AbstractProblem

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javax.constraints.impl
Class AbstractProblem

java.lang.Object
  javax.constraints.impl.AbstractProblem

All Implemented Interfaces:: Problem

public abstract class AbstractProblem
extends java.lang.Object
implements Problem
extends java.lang.Object
implements Problem

Problem - a placeholder for all components used to represent and resolve a constraint satisfaction problem (Problem). A Problem usually consists of two parts:

Problem Definition: contains all constrained objects and constraints that define and control relationships between constrained objects
Problem Resolution: contains search algorithm (goals) that allows to solve the problem

The decision variables are represented in form of Java objects which may use the predefined constrained variables types such as Var, VarReal, VarSet. The constraints themselves are objects inherited from a generic class Constraint. The interface covers major binary and global constraints required for the practical CP programming. It is possible to define and add new constraints.

To find the problem solutions, javax.constraints uses search algorithms presented using objects of the predefined type Goal. Goals are building blocks to define different search algorithms.

See Also:: Var, Constraint, Goal

Field Summary

Fields inherited from interface javax.constraints.Problem
`JSR331_VERSION`

Constructor Summary
`AbstractProblem(java.lang.String name)`

Method Summary
`Constraint`	`add(Constraint constraint)` Adds a Constraint "constraint" to the problem, then returns the constraint.
`Constraint`	`add(java.lang.String name, Constraint constraint)` Gives a Constraint "constraint" a new name "name", adds the Constraint to the problem and returns the newly added Constraint.
`Var`	`add(java.lang.String name, Var var)` Gives the Var variable "var" a new name "name", adds it to the problem, and returns the newly added Var.
`VarReal`	`add(java.lang.String name, VarReal var)` Gives the VarReal variable "var" a new name "name", adds it to the problem, and returns the newly added VarReal.
`Var`	`add(Var var)` Adds a Var variable "var" to the problem, and returns the newly added Var.
`VarBool`	`add(VarBool varBool)` Adds a VarBool variable "var" to the problem, and returns the newly added Var.
`VarReal`	`add(VarReal var)` Adds a VarReal variable "var" to the problem, and returns the newly added VarReal.
`void`	`add(VarString var)`
`Reversible`	`addReversible(java.lang.String name, int value)` Creates a Reversible integer with the name "name" and value "value" and returns the newly added Reversible.
`Var[]`	`addVarArray(java.lang.String arrayName, java.lang.String[] varNames)` Creates an array of Var variables with name "arrayName".
`Var[]`	`addVarArray(java.lang.String name, Var[] vars)` Gives the array of Var variables "vars" a new name "name", adds the array of variables to the problem, and returns the newly added Var array.
`Constraint`	`allDiff(VarList vars)` This method create a new Constraint stating that all of the elements of the list of variables "vars" must take different values from each other.
`Constraint`	`and(Constraint[] array)` Returns an "AND" Constraint.
`abstract Var`	`createVariable(java.lang.String name, int min, int max)` Creates a Var with the name "name" and domain [min;max] of the default domain type, and returns the newly added Var.
`abstract void`	`debug(java.lang.String text)` Log the String parameter "text"
`Var`	`element(int[] array, Var indexVar)` Returns a constrained integer variable that is an element of the integer "array" with index defined as another constrained integer variable "indexVar".
`VarSet`	`element(java.util.Set<java.lang.Integer>[] sets, Var indexVar)` Creates a set variable that corresponds to sets[index]
`Var`	`element(Var[] array, Var indexVar)` Returns a constrained integer variable that is an element of the "array" of variables with index defined as another constrained integer variable "indexVar".
`Var`	`element(VarList list, Var indexVar)`
`abstract void`	`error(java.lang.String text)` Log the String parameter "text"
`java.lang.String`	`getAPIVersion()` Returns JSR331 API version number
`Constraint`	`getConstraint(java.lang.String name)` Returns the Constraint the name "name", or null if no such constraints exists in the problem.
`Constraint[]`	`getConstraints()` Returns an array of Objects containing the Constraints previously added to the problem.
`DomainType`	`getDomainType()`
`Constraint`	`getFalseConstraint()` Returns the constant constraint that always will fail when it is posted or executed.
`abstract java.lang.String`	`getImplVersion()` Returns JSR331 Implementation version number
`java.lang.String`	`getName()` Returns the problem name
`double`	`getRealPrecision()` Returns the precision for VarReals
`Solver`	`getSolver()` Returns an instance of a Solver associated with this problem.
`Constraint`	`getTrueConstraint()` Returns the constant constraint that always succeeds when it is posted or executed.
`Var`	`getVar(java.lang.String name)` Returns the Var variable with the name "name", or null if no such variable exists in the problem.
`Var[]`	`getVarArray(java.lang.String name)` Returns the array of Var variables with the name "name", or null if no such array exists in the problem.
`VarBool[]`	`getVarBools()` Returns an array containing the VarBool variables previously added to the problem.
`VarMatrix`	`getVarMatrix(java.lang.String name)`
`VarReal`	`getVarReal(java.lang.String name)` Returns the VarReal variable with the name "name", or null if no such variable exists in the problem.
`VarReal[]`	`getVarReals()` Returns an array containing the VarReal variables previously added to the problem.
`Var[]`	`getVars()` Returns an array containing the Var variables previously added to the problem.
`VarReal[]`	`getVarSets()` Returns an array containing the VarSet variables previously added to the problem.
`VarString`	`getVarString(java.lang.String name)`
`VarString[]`	`getVarStrings()`
`boolean`	`isSolverCreated()`
`Constraint`	`linear(VarString var, java.lang.String oper, java.lang.String value)`
`void`	`log(Constraint[] constraints)` Logs all Constraints contained in the array "constraints".
`abstract void`	`log(java.lang.String text)` Log the String parameter "text"
`void`	`log(java.lang.String text, Var[] vars)` Logs the String "text" and then all integer constrained variables added to the problem.
`void`	`log(java.lang.String text, VarReal[] vars)` Logs the String "text" and then all real constrained variables contained in the array "vars".
`void`	`log(java.lang.String text, VarSet[] vars)` Logs the String "text" and then all constrained set variables contained in the array "vars".
`void`	`log(Var[] vars)` Logs the integer constrained variables contained in the array "vars".
`void`	`log(VarList vars)`
`void`	`log(VarReal[] vars)` Logs the real constrained variables contained in the array "vars".
`void`	`log(VarSet[] vars)` Logs the constrained set variables contained in the array "vars".
`Var`	`max(Var[] vars)` Returns a constrained integer variable that is equal to the maximal variable in the array "arrayOfVariables" when they are all instantiated.
`Var`	`max(VarList listOfVariables)`
`Var`	`max(Var var1, Var var2)` Returns a constrained integer variable that is equal to the maximal of two variablea var1 or var 2 when they are both instantiated.
`Var`	`min(Var[] vars)` Returns a constrained integer variable that is equal to the minimal variable in the array "arrayOfVariables" when they are all instantiated.
`Var`	`min(VarList listOfVariables)`
`Var`	`min(Var var1, Var var2)` Returns a constrained integer variable that is equal to the minimal of two variablea var1 or var 2 when they are both instantiated.
`void`	`notImplementedException(java.lang.String feature)`
`abstract void`	`post(Constraint constraint)` This method takes a constraint's implementation and uses its own implementation-specific post-method.
`Constraint`	`post(int[] array, VarList vars, java.lang.String oper, int value)`
`Constraint`	`post(int[] array, VarList vars, java.lang.String oper, Var var)`
`Constraint`	`post(java.lang.String name, java.lang.String symbolicExpression)` Creates a Constraint based on the symbolicExpression such as "xy-z<3r", adds this constraint to the problem, and returns the newly added Constraint.
`Constraint`	`post(VarList vars, java.lang.String oper, int value)` Creates and posts a constraint: sum of vars value
`Constraint`	`post(VarList vars, java.lang.String oper, Var var)` Creates and posts a constraint: sum of vars "oper" var
`Constraint`	`post(VarString var, java.lang.String oper, java.lang.String value)`
`Constraint`	`post(VarString var1, java.lang.String oper, VarString var2)`
`Constraint`	`post(Var var1, Var var2, java.lang.String oper, int value)` Creates and posts a constraint: (var1 + var2) "oper" value
`Constraint`	`post(Var var1, Var var2, java.lang.String oper, Var var)` Creates and posts a constraint: (var1 + var2) "oper" var
`Constraint`	`postAllDiff(java.util.ArrayList<Var> vars)` Similar to postAllDiff for variables saved in the ArrayList vars
`Constraint`	`postAllDiff(Var[] vars)` This constraint is a synonym for constraintAllDifferent
`Constraint`	`postAllDifferent(java.util.ArrayList<Var> vars)` Similar to postAllDifferent for variables saved in the ArrayList vars
`Constraint`	`postAllDifferent(java.util.List vars)`
`Constraint`	`postAllDifferent(Var[] vars)` Creates and posts a new Constraint stating that all of the elements of the array of variables "vars" must take different values from each other.
`Constraint`	`postAllDifferent(VarList vars)`
`Constraint`	`postAnd(Constraint c1, Constraint c2)` Creates and posts a constraint an "AND" Constraint.
`Constraint`	`postCardinality(Var[] vars, Var cardVar, java.lang.String oper, int value)` This method is similar to the one above but instead of �var� it uses "value"
`Constraint`	`postCardinality(Var[] vars, Var cardVar, java.lang.String oper, Var var)` This method creates a new cardinality constraint �cardinality(vars,cardVar) < value�.
`Constraint`	`postCardinality(VarList vars, int cardValue, java.lang.String oper, int value)`
`Constraint`	`postCardinality(VarList vars, int cardValue, java.lang.String oper, Var var)`
`Constraint`	`postCardinality(VarList vars, Var cardVar, java.lang.String oper, int value)`
`Constraint`	`postCardinality(VarList vars, Var cardVar, java.lang.String oper, Var var)`
`Constraint`	`postElement(java.util.Set[] arrayOfSets, Var indexVar, java.lang.String oper, VarSet var)` Creates and posts a constraint: arrayOfSets[indexVar] setVar Here "arrayOfSets[indexVar]" denotes a constrained set variable, which domain consists of sets of integers arrayOfSets[i] where i is within domain of the "indexVar".
`Constraint`	`postGlobalCardinality(Var[] vars, int[] values, int[] cardMin, int[] cardMax)` For each index i the number of times the value "values[i]" occurs in the array "vars" should be cardMin[i] and cardMax[i] (inclusive)
`Constraint`	`postGlobalCardinality(Var[] vars, int[] values, Var[] cardinalityVars)` Creates and posts a new global cardinality constraint that states:
`Constraint`	`postGlobalCardinality(VarList vars, int[] values, int[] cardMin, int[] cardMax)`
`Constraint`	`postGlobalCardinality(VarList vars, int[] values, Var[] cardinalityVars)`
`Constraint`	`postIfThen(Constraint constraint1, Constraint constraint2)` Creates and posts a constraint that states the implication: constraint1 => constraint2.
`Constraint`	`postLinear(int[] array, Var[] vars, java.lang.String oper, int value)` Synonym for constraint(int[] array, Var[] vars, String oper, int value)
`Constraint`	`postLinear(int[] array, Var[] vars, java.lang.String oper, Var var)` Synonym for constraint(int[] array, Var[] vars, String oper, Var var)
`Constraint`	`postLinear(int[] array, VarList vars, java.lang.String oper, int value)`
`Constraint`	`postLinear(int[] array, VarList vars, java.lang.String oper, Var var)`
`Constraint`	`postLinear(Var[] vars, java.lang.String oper, int value)` Synonym for constraint(Var[] vars, String oper, int value)
`Constraint`	`postLinear(Var[] vars, java.lang.String oper, Var var)` Synonym for constraint(Var[] vars, String oper, Var var)
`Constraint`	`postLinear(Var var, java.lang.String oper, int value)` Synonym for constraint(Var var, String oper, int value)
`Constraint`	`postLinear(Var var1, java.lang.String oper, Var var2)` Synonym for constraint(Var var1, String oper, Var var2)
`Constraint`	`postMax(Var[] vars, java.lang.String oper, int value)` Creates and posts a constraint: max(vars) "oper" value where max(vars) is a maximal variable in the array "vars" when they are all instantiated.
`Constraint`	`postMax(Var[] vars, java.lang.String oper, Var var)` Creates and posts a constraint: max(vars) "oper" var where max(vars) is a maximal variable in the array "vars" when they are all instantiated.
`Constraint`	`postMin(Var[] vars, java.lang.String oper, int value)` Creates and posts a constraint: min(vars) "oper" value where max(vars) is a minimal variable in the array "vars" when they are all instantiated.
`Constraint`	`postMin(Var[] vars, java.lang.String oper, Var var)` Creates and posts a constraint: min(vars) "oper" var where max(vars) is a minimal variable in the array "vars" when they are all instantiated.
`Constraint`	`postOr(Constraint c1, Constraint c2)` Creates and posts a constraint an "OR" Constraint.
`void`	`remove(java.lang.String varName)` Removes a Var variable by "name".
`Var`	`scalProd(int[] arrayOfValues, VarList vars)`
`void`	`setDomainType(DomainType domainType)` Sets the domain type that will be used as the default for subsequent creation of variables using addVar-methods
`void`	`setName(java.lang.String name)` Sets the problem name
`void`	`setRealPrecision(double value)` Sets the precision for VarReals
`void`	`setSolver(Solver solver)` Associates a "solver" with the problem making it available through the method "getSolver()".
`Var`	`sum(Var[] vars)` Returns a constrained integer variable that is constrained to be the sum of the variables in the array "vars".
`Var`	`sum(VarList vars)` Returns a constrained integer variable that is constrained to be the sum of the variables in the VarList "vars".
`Var`	`var(java.lang.String name, java.lang.String symbolicExpression)` Creates a Var variable based on the symbolicExpression, adds this variable to the problem, and returns the newly added Var.
`Var`	`variable(int[] domain)` An equivalent of var("",domain)
`Var`	`variable(int min, int max)` Creates a Var with domain [min;max].
`Var`	`variable(java.lang.String name, int[] domain)` Creates a Var with the name "name", and domain int[]
`Var`	`variable(java.lang.String name, int min, int max)` Creates a Var by calling createVariable(name,min,max) and adds this variable to the problem.
`Var`	`variable(java.lang.String name, int min, int max, DomainType domainType)` Similar to variable(String name, int min, int max) but also has one more parameter that defines the default domain type
`Var[]`	`variableArray(java.lang.String name, int min, int max, int size)` Adds an array of Var variables with the name "name" and domains [min;max] of domain type "type", adds this array of variables to the problem, and returns the newly added Var array.
`VarBool`	`variableBool()` Creates a bool var not added to the problem.
`abstract VarBool`	`variableBool(java.lang.String name)` Creates a boolean constrained variable with the name "name" and adds this variable to the problem, and returns the newly added VarBool.
`VarList`	`variableList()`
`VarMatrix`	`variableMatrix(java.lang.String name, int min, int max, int rows, int columns)`
`VarReal`	`variableReal(java.lang.String name)` Creates a VarReal with the name "name" and default domain [Double.MIN_VALUE+1;Double.MAX_VALUE-1], adds this variable to the problem, and returns the newly added VarReal.
`VarReal`	`variableReal(java.lang.String name, double min, double max)` Creates a VarReal with the name "name" and domain [min;max], adds this variable to the problem, and returns the newly added VarReal.
`VarSet`	`variableSet(java.lang.String name, int[] values)` Creates a constrained set variable VarSet with the name "name" and which domain consists of integer values from the array "value".
`VarSet`	`variableSet(java.lang.String name, int min, int max)` Creates a constrained set variable VarSet with the name "name" and domain of integer values from "min" to "max" inclusive.
`VarSet`	`variableSet(java.lang.String name, java.util.Set set)` Creates a constrained set variable VarSet with the name "name" and which domain consists of integer values from the Set "set".
`VarString`	`variableString(java.lang.String name, java.lang.String[] allStrings)`
`Var[]`	`varSquare(java.lang.String name, int min, int max, int size)` Creates a 2-dimensional array of Var variables, with dimensions "size"x"size".

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface javax.constraints.Problem
`allDiff, linear, linear, loadFromXML, post, post, post, post, post, post, postCardinality, postCardinality, postElement, postElement, postElement, postElement, scalProd, storeToXML`

Constructor Detail

AbstractProblem

public AbstractProblem(java.lang.String name)

Method Detail

add

public Constraint add(Constraint constraint)

Adds a Constraint "constraint" to the problem, then returns the constraint. The Constraint is not posted.

Specified by:: add in interface Problem

Parameters:: constraint - the constraint to add to the problem.
Returns:: the Constraint added to the problem.

add

public Constraint add(java.lang.String name,
                      Constraint constraint)

Gives a Constraint "constraint" a new name "name", adds the Constraint to the problem and returns the newly added Constraint. The Constraint is not posted.

Parameters:: name - the new name for the Constraint.; constraint - the Constraint to add to the problem
Returns:: the Constraint added to the problem.

add

public Var add(java.lang.String name,
               Var var)

Gives the Var variable "var" a new name "name", adds it to the problem, and returns the newly added Var.

Specified by:: add in interface Problem

Parameters:: name - the new name for var.; var - the variable to add to the problem.
Returns:: the Var variable added to the problem.

add

public VarReal add(java.lang.String name,
                   VarReal var)

Gives the VarReal variable "var" a new name "name", adds it to the problem, and returns the newly added VarReal.

Parameters:: name - the new name for var.; var - the real variable to add to the problem.
Returns:: the VarReal variable added to the problem.

add

public Var add(Var var)

Adds a Var variable "var" to the problem, and returns the newly added Var.

Specified by:: add in interface Problem

Parameters:: var - the variable to add to the problem.
Returns:: the Var variable added to the problem.

add

public VarBool add(VarBool varBool)

Adds a VarBool variable "var" to the problem, and returns the newly added Var.

Specified by:: add in interface Problem

Parameters:: varBool - the bolean variable to add to the problem.
Returns:: the VarBool variable added to the problem.

add

public VarReal add(VarReal var)

Adds a VarReal variable "var" to the problem, and returns the newly added VarReal.

Specified by:: add in interface Problem

Parameters:: var - the real variable to add to the problem.
Returns:: the VarReal variable added to the problem.

add

public void add(VarString var)

Specified by:: add in interface Problem

addReversible

public Reversible addReversible(java.lang.String name,
                                int value)

Creates a Reversible integer with the name "name" and value "value" and returns the newly added Reversible.

Parameters:: name - the name for the new reversible.; value - the initial value
Returns:: the reversible integer

addVarArray

public Var[] addVarArray(java.lang.String arrayName,
                         java.lang.String[] varNames)

Creates an array of Var variables with name "arrayName". The variables to be contained in the array must have already been added to the problem, and their names are specified in "varNames".

Parameters:: arrayName - the name for the new Var array.; varNames - an array of names of already added variables, which are to form the new array.
Returns:: the array of Var variables created and added to the problem.

addVarArray

public Var[] addVarArray(java.lang.String name,
                         Var[] vars)

Gives the array of Var variables "vars" a new name "name", adds the array of variables to the problem, and returns the newly added Var array.

Parameters:: name - the new name for the array "vars".; vars - the array of Var variables to add to the problem.
Returns:: the array of Var variables added to the problem.

allDiff

public Constraint allDiff(VarList vars)

Description copied from interface: Problem

This method create a new Constraint stating that all of the elements of the list of variables "vars" must take different values from each other. To have an effect the constraint should be posted using Constraint's methods post() or post(ConsistencyLevel consistencyLevel)

Specified by:: allDiff in interface Problem

Parameters:: vars - the VarList which must all take different values.
Returns:: a newly created constraint

and

public Constraint and(Constraint[] array)

Returns an "AND" Constraint. The Constraint "AND" is satisfied if all of the Constraints in the array "array" are satisfied. The Constraint "AND" is not satisfied if at least one of the Constraints in "array" is not satisfied.

Parameters:: array - the array of constraints forming the new "AND" Constraint.
Returns:: a Constraint "AND" between all the Constraints in the array "array".

createVariable

public abstract Var createVariable(java.lang.String name,
                                   int min,
                                   int max)

Description copied from interface: Problem

Creates a Var with the name "name" and domain [min;max] of the default domain type, and returns the newly added Var. The variable will be created with the default domain type or by the latest call of the method setDomainType().

Specified by:: createVariable in interface Problem

Parameters:: name - the name for the new Var.; min - the minimum value in the domain for the new Var.; max - the maximum value in the domain for the new Var.
Returns:: the Var variable created and added to the problem.

debug

public abstract void debug(java.lang.String text)

Log the String parameter "text"

element

public Var element(int[] array,
                   Var indexVar)

Returns a constrained integer variable that is an element of the integer "array" with index defined as another constrained integer variable "indexVar". When index is bound to the value i, the value of the resulting variable is array[i]. More generally, the domain of the returned variable is the set of values array[i] where the i are in the domain of index.

Specified by:: element in interface Problem

Parameters:: array - an array of integers; indexVar - a constrained integer variable whose domain serves as an index into the array.
Returns:: a constrained integer variable whose domain is the set of values array[i] where each i is in the domain of "indexVar".

element

public VarSet element(java.util.Set<java.lang.Integer>[] sets,
                      Var indexVar)
               throws java.lang.Exception

Creates a set variable that corresponds to sets[index]

Specified by:: element in interface Problem

Parameters:: sets -; indexVar -
Returns:: a set variable
Throws:: java.lang.Exception

element

public Var element(Var[] array,
                   Var indexVar)

Returns a constrained integer variable that is an element of the "array" of variables with index defined as another constrained integer variable "indexVar". When index is bound to the value i, the value of the resulting variable is array[i]. More generally, the domain of the returned variable is the set of values array[i] where the i are in the domain of index.

Specified by:: element in interface Problem

Parameters:: array - an array of Var variables.; indexVar - a constrained integer variable whose domain serves as an index into the array.
Returns:: a constrained integer variable whose domain is the set of values array[i] where each i is in the domain of "indexVar".

element

public Var element(VarList list,
                   Var indexVar)

Specified by:: element in interface Problem

error

public abstract void error(java.lang.String text)

Log the String parameter "text"

getAPIVersion

public java.lang.String getAPIVersion()

Description copied from interface: Problem

Returns JSR331 API version number

Specified by:: getAPIVersion in interface Problem

Returns:: JSR331 API version number

getConstraint

public final Constraint getConstraint(java.lang.String name)

Description copied from interface: Problem

Returns the Constraint the name "name", or null if no such constraints exists in the problem.

Specified by:: getConstraint in interface Problem

Parameters:: name - the name of the desired constraint.
Returns:: the Constraint the name "name", or null if no such constraints exists in the problem.

getConstraints

public Constraint[] getConstraints()

Returns an array of Objects containing the Constraints previously added to the problem.

Specified by:: getConstraints in interface Problem

Returns:: an array of Objects containing the Constraints previously added to the problem.

getDomainType

public final DomainType getDomainType()

getFalseConstraint

public Constraint getFalseConstraint()

Returns the constant constraint that always will fail when it is posted or executed.

Specified by:: getFalseConstraint in interface Problem

Returns:: the False Constraint

getImplVersion

public abstract java.lang.String getImplVersion()

Description copied from interface: Problem

Returns JSR331 Implementation version number

Specified by:: getImplVersion in interface Problem

Returns:: JSR331 Implementation version number

getName

public final java.lang.String getName()

Description copied from interface: Problem

Returns the problem name

Specified by:: getName in interface Problem

Returns:: the problem name

getRealPrecision

public double getRealPrecision()

Returns the precision for VarReals

Specified by:: getRealPrecision in interface Problem

Returns:: the precision for VarReals

getSolver

public Solver getSolver()

Returns an instance of a Solver associated with this problem. If a solver is not defined yet, creates a new Solver and associates it with the problem.

Specified by:: getSolver in interface Problem

Returns:: a solver

getTrueConstraint

public Constraint getTrueConstraint()

Returns the constant constraint that always succeeds when it is posted or executed.

Specified by:: getTrueConstraint in interface Problem

Returns:: the True Constraint

getVar

public Var getVar(java.lang.String name)

Returns the Var variable with the name "name", or null if no such variable exists in the problem.

Specified by:: getVar in interface Problem

Parameters:: name - the name of the desired variable.
Returns:: the Var variable with the name "name", or null if no such variable exists in the problem.

getVarArray

public Var[] getVarArray(java.lang.String name)

Returns the array of Var variables with the name "name", or null if no such array exists in the problem.

Specified by:: getVarArray in interface Problem

Parameters:: name - the name of the desired array of Var variables.
Returns:: the array of Var variables with the name "name", or null if no such array exists in the problem.

getVarBools

public VarBool[] getVarBools()

Returns an array containing the VarBool variables previously added to the problem.

Specified by:: getVarBools in interface Problem

Returns:: an array containing the VarBool variables previously added to the problem.

getVarMatrix

public VarMatrix getVarMatrix(java.lang.String name)

Specified by:: getVarMatrix in interface Problem

getVarReal

public VarReal getVarReal(java.lang.String name)

Returns the VarReal variable with the name "name", or null if no such variable exists in the problem.

Specified by:: getVarReal in interface Problem

Parameters:: name - the name of the desired variable.
Returns:: the VarReal variable with the name "name", or null if no such variable exists in the problem.

getVarReals

public VarReal[] getVarReals()

Returns an array containing the VarReal variables previously added to the problem.

Specified by:: getVarReals in interface Problem

Returns:: an array containing the VarReal variables previously added to the problem.

getVars

public Var[] getVars()

Returns an array containing the Var variables previously added to the problem.

Specified by:: getVars in interface Problem

Returns:: an array containing the Var variables previously added to the problem.

getVarSets

public VarReal[] getVarSets()

Returns an array containing the VarSet variables previously added to the problem.

Specified by:: getVarSets in interface Problem

Returns:: an array containing the VarSet variables previously added to the problem.

getVarString

public VarString getVarString(java.lang.String name)

Specified by:: getVarString in interface Problem

getVarStrings

public VarString[] getVarStrings()

Specified by:: getVarStrings in interface Problem

isSolverCreated

public boolean isSolverCreated()

linear

public Constraint linear(VarString var,
                         java.lang.String oper,
                         java.lang.String value)

Specified by:: linear in interface Problem

log

public void log(Constraint[] constraints)

Logs all Constraints contained in the array "constraints".

log

public abstract void log(java.lang.String text)

Log the String parameter "text"

Specified by:: log in interface Problem

log

public void log(java.lang.String text,
                Var[] vars)

Logs the String "text" and then all integer constrained variables added to the problem.

Parameters:: text - the text to log prior to logging all the integer constrained variables added to the problem.

log

public void log(java.lang.String text,
                VarReal[] vars)

Logs the String "text" and then all real constrained variables contained in the array "vars".

Parameters:: text - the text to log prior to logging all the real constrained variables added to the problem.

log

public void log(java.lang.String text,
                VarSet[] vars)

Logs the String "text" and then all constrained set variables contained in the array "vars".

Parameters:: text - the text to log prior to logging all the constrained set variables added to the problem.

log

public void log(Var[] vars)

Logs the integer constrained variables contained in the array "vars".

Specified by:: log in interface Problem

Parameters:: vars - the array of Vars to log.

log

public void log(VarList vars)

Specified by:: log in interface Problem

log

public void log(VarReal[] vars)

Logs the real constrained variables contained in the array "vars".

Parameters:: vars - the array of VarReals to log.

log

public void log(VarSet[] vars)

Logs the constrained set variables contained in the array "vars".

Parameters:: vars - the array of VarSets to log.

max

public Var max(Var[] vars)

Returns a constrained integer variable that is equal to the maximal variable in the array "arrayOfVariables" when they are all instantiated.

Specified by:: max in interface Problem

Parameters:: vars - the array of variables from which we desire the maximal variable.
Returns:: a constrained integer variable that is equal to the maximal variable in the array "arrayOfVariables" when they are all instantiated.

max

public Var max(VarList listOfVariables)

Specified by:: max in interface Problem

max

public Var max(Var var1,
               Var var2)

Description copied from interface: Problem

Returns a constrained integer variable that is equal to the maximal of two variablea var1 or var 2 when they are both instantiated.

Specified by:: max in interface Problem

Parameters:: var1 - integer variable; var2 - integer variable
Returns:: maximum of two variables: var1 and var2

min

public Var min(Var[] vars)

Returns a constrained integer variable that is equal to the minimal variable in the array "arrayOfVariables" when they are all instantiated.

Specified by:: min in interface Problem

Parameters:: vars - the array of variables from which we desire the minimal variable.
Returns:: a constrained integer variable that is equal to the minimal variable in the array "arrayOfVariables" when they are all instantiated.

min

public Var min(VarList listOfVariables)

Specified by:: min in interface Problem

min

public Var min(Var var1,
               Var var2)

Description copied from interface: Problem

Returns a constrained integer variable that is equal to the minimal of two variablea var1 or var 2 when they are both instantiated.

Specified by:: min in interface Problem

Parameters:: var1 - integer variable; var2 - integer variable
Returns:: minimum of two variables: var1 and var2

notImplementedException

public void notImplementedException(java.lang.String feature)

post

public abstract void post(Constraint constraint)

This method takes a constraint's implementation and uses its own implementation-specific post-method.

Specified by:: post in interface Problem

Parameters:: constraint - the constraint to post.
Throws:: java.lang.RuntimeException - if a failure happened during the posting

post

public Constraint post(int[] array,
                       VarList vars,
                       java.lang.String oper,
                       int value)

Specified by:: post in interface Problem

post

public Constraint post(int[] array,
                       VarList vars,
                       java.lang.String oper,
                       Var var)

post

public Constraint post(java.lang.String name,
                       java.lang.String symbolicExpression)

Creates a Constraint based on the symbolicExpression such as "x*y-z<3*r", adds this constraint to the problem, and returns the newly added Constraint. It is assumed that all variables in the expression were previously created under names used within this expression. If the returned Constraint is null, there is either an error inside the symbolicExpression or there is no concrete solver implementation of this method. In either case, the constraint will not have been added to the problem.

Specified by:: post in interface Problem

Parameters:: name - the name for a new constraint; symbolicExpression - a string that defines a constrained expression that uses already defined variables, e.g. "x*y-z<3*r"
Returns:: the constraint created and added to the problem, or null if there is an error inside the symbolicExpression or if this method is not defined by a concrete solver implementation.

post

public Constraint post(VarList vars,
                       java.lang.String oper,
                       int value)

Description copied from interface: Problem

Creates and posts a constraint: sum of vars value

Specified by:: post in interface Problem

Returns:: a newly created constraint

post

public Constraint post(VarList vars,
                       java.lang.String oper,
                       Var var)

Description copied from interface: Problem

Creates and posts a constraint: sum of vars "oper" var

Specified by:: post in interface Problem

Returns:: a newly created constraint

post

public Constraint post(VarString var,
                       java.lang.String oper,
                       java.lang.String value)

Specified by:: post in interface Problem

post

public Constraint post(VarString var1,
                       java.lang.String oper,
                       VarString var2)

Specified by:: post in interface Problem

post

public Constraint post(Var var1,
                       Var var2,
                       java.lang.String oper,
                       int value)

Creates and posts a constraint: (var1 + var2) "oper" value

Specified by:: post in interface Problem

Returns:: a newly created constraint

post

public Constraint post(Var var1,
                       Var var2,
                       java.lang.String oper,
                       Var var)

Creates and posts a constraint: (var1 + var2) "oper" var

Specified by:: post in interface Problem

Returns:: a newly created constraint

postAllDiff

public Constraint postAllDiff(java.util.ArrayList<Var> vars)

Description copied from interface: Problem

Similar to postAllDiff for variables saved in the ArrayList vars

Specified by:: postAllDiff in interface Problem

postAllDiff

public Constraint postAllDiff(Var[] vars)

This constraint is a synonym for constraintAllDifferent

Specified by:: postAllDiff in interface Problem

postAllDifferent

public Constraint postAllDifferent(java.util.ArrayList<Var> vars)

Description copied from interface: Problem

Similar to postAllDifferent for variables saved in the ArrayList vars

Specified by:: postAllDifferent in interface Problem

postAllDifferent

public Constraint postAllDifferent(java.util.List vars)

Specified by:: postAllDifferent in interface Problem

postAllDifferent

public Constraint postAllDifferent(Var[] vars)

Creates and posts a new Constraint stating that all of the elements of the array of variables "vars" must take different values from each other.

Specified by:: postAllDifferent in interface Problem

Parameters:: vars - the array of Vars which must all take different values.
Returns:: the all-different Constraint on the array of Vars.

postAllDifferent

public Constraint postAllDifferent(VarList vars)

Specified by:: postAllDifferent in interface Problem

postAnd

public Constraint postAnd(Constraint c1,
                          Constraint c2)

Creates and posts a constraint an "AND" Constraint. The Constraint "AND" is satisfied if both of the Constraints "c1" and "c2" are satisfied. The Constraint "AND" is not satisfied if at least one of the Constraints "c1" or "c2" are not satisfied.

Specified by:: postAnd in interface Problem

Parameters:: c1 - a Constraint; c2 - a Constraint
Returns:: a Constraint "AND" between the Constraints "c1" and "c2".

postCardinality

public Constraint postCardinality(Var[] vars,
                                  Var cardVar,
                                  java.lang.String oper,
                                  int value)

This method is similar to the one above but instead of �var� it uses "value"

Specified by:: postCardinality in interface Problem

postCardinality

public Constraint postCardinality(Var[] vars,
                                  Var cardVar,
                                  java.lang.String oper,
                                  Var var)

This method creates a new cardinality constraint �cardinality(vars,cardVar) < value�. Here �cardinality(vars,cardVar)� denotes a constrained integer variable that is equal to the number of those elements in the array "vars" that are bound to the value of the variable "cardVar" when it is instantiated. For example, if �oper� is "<" it means that the variable �cardinality(vars,cardValue)� must be less than the �var�. This constraint does NOT assume a creation of an intermediate variable "cardinality(vars,cardValue)".

Specified by:: postCardinality in interface Problem

postCardinality

public Constraint postCardinality(VarList vars,
                                  int cardValue,
                                  java.lang.String oper,
                                  int value)

Specified by:: postCardinality in interface Problem

postCardinality

public Constraint postCardinality(VarList vars,
                                  int cardValue,
                                  java.lang.String oper,
                                  Var var)

Specified by:: postCardinality in interface Problem

postCardinality

public Constraint postCardinality(VarList vars,
                                  Var cardVar,
                                  java.lang.String oper,
                                  int value)

Specified by:: postCardinality in interface Problem

postCardinality

public Constraint postCardinality(VarList vars,
                                  Var cardVar,
                                  java.lang.String oper,
                                  Var var)

Specified by:: postCardinality in interface Problem

postElement

public Constraint postElement(java.util.Set[] arrayOfSets,
                              Var indexVar,
                              java.lang.String oper,
                              VarSet var)

Creates and posts a constraint: arrayOfSets[indexVar] setVar Here "arrayOfSets[indexVar]" denotes a constrained set variable, which domain consists of sets of integers arrayOfSets[i] where i is within domain of the "indexVar". When indexVar is bound to the value v, the value of the resulting variable is arrayOfSets[v]. The operator "oper" defines the type of relationships between "arrayOfSets[indexVar]" and "setVar"

Specified by:: postElement in interface Problem

Parameters:: arrayOfSets - an array of integer sets.; indexVar - a constrained integer variable whose domain serves as an index into the "arrayOfSets".
Returns:: a newly created constraint
Throws:: java.lang.RuntimeException - if the posting fails

postGlobalCardinality

public Constraint postGlobalCardinality(Var[] vars,
                                        int[] values,
                                        int[] cardMin,
                                        int[] cardMax)

For each index i the number of times the value "values[i]" occurs in the array "vars" should be cardMin[i] and cardMax[i] (inclusive)

Specified by:: postGlobalCardinality in interface Problem

Parameters:: vars - array of constrained integer variables; values - array of integer values within domain of all vars; cardMin - array of integers that serves as lower bounds for values[i]; cardMax - array of integers that serves as upper bounds for values[i] Note that arrays values, cardMin, and cardMax should have the same size otherwise a RuntimeException will be thrown

postGlobalCardinality

public Constraint postGlobalCardinality(Var[] vars,
                                        int[] values,
                                        Var[] cardinalityVars)

Description copied from interface: Problem

Creates and posts a new global cardinality constraint that states:

For each index i the number of times the value "values[i]" occurs in the array "vars" is exactly "cardinalityVars[i]"

Specified by:: postGlobalCardinality in interface Problem

Parameters:: vars - array of constrained integer variables; values - array of integer values; cardinalityVars - array of constrained integer variables (cardinality variables)
Returns:: a newly created constraint

postGlobalCardinality

public Constraint postGlobalCardinality(VarList vars,
                                        int[] values,
                                        int[] cardMin,
                                        int[] cardMax)

Specified by:: postGlobalCardinality in interface Problem

postGlobalCardinality

public Constraint postGlobalCardinality(VarList vars,
                                        int[] values,
                                        Var[] cardinalityVars)

Specified by:: postGlobalCardinality in interface Problem

postIfThen

public Constraint postIfThen(Constraint constraint1,
                             Constraint constraint2)

Creates and posts a constraint that states the implication: constraint1 => constraint2. In other words, if this constraint is satisfied, then constraint "c" should also be satisfied.

Specified by:: postIfThen in interface Problem

Parameters:: constraint1 - If-Constraint in the implication.; constraint2 - Then-Constraint in the implication.
Returns:: a Constraint that means: if constraint1 then constraint2

postLinear

public Constraint postLinear(int[] array,
                             Var[] vars,
                             java.lang.String oper,
                             int value)

Description copied from interface: Problem

Synonym for constraint(int[] array, Var[] vars, String oper, int value)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(int[] array,
                             Var[] vars,
                             java.lang.String oper,
                             Var var)

Description copied from interface: Problem

Synonym for constraint(int[] array, Var[] vars, String oper, Var var)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(int[] array,
                             VarList vars,
                             java.lang.String oper,
                             int value)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(int[] array,
                             VarList vars,
                             java.lang.String oper,
                             Var var)

postLinear

public Constraint postLinear(Var[] vars,
                             java.lang.String oper,
                             int value)

Description copied from interface: Problem

Synonym for constraint(Var[] vars, String oper, int value)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(Var[] vars,
                             java.lang.String oper,
                             Var var)

Description copied from interface: Problem

Synonym for constraint(Var[] vars, String oper, Var var)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(Var var,
                             java.lang.String oper,
                             int value)

Description copied from interface: Problem

Synonym for constraint(Var var, String oper, int value)

Specified by:: postLinear in interface Problem

postLinear

public Constraint postLinear(Var var1,
                             java.lang.String oper,
                             Var var2)

Description copied from interface: Problem

Synonym for constraint(Var var1, String oper, Var var2)

Specified by:: postLinear in interface Problem

postMax

public Constraint postMax(Var[] vars,
                          java.lang.String oper,
                          int value)

Creates and posts a constraint: max(vars) "oper" value where max(vars) is a maximal variable in the array "vars" when they are all instantiated.

Specified by:: postMax in interface Problem

Parameters:: vars -; oper -; value -

postMax

public Constraint postMax(Var[] vars,
                          java.lang.String oper,
                          Var var)

Creates and posts a constraint: max(vars) "oper" var where max(vars) is a maximal variable in the array "vars" when they are all instantiated.

Specified by:: postMax in interface Problem

Parameters:: vars -; oper -; var -

postMin

public Constraint postMin(Var[] vars,
                          java.lang.String oper,
                          int value)

Creates and posts a constraint: min(vars) "oper" value where max(vars) is a minimal variable in the array "vars" when they are all instantiated.

Specified by:: postMin in interface Problem

Parameters:: vars -; oper -; value -

postMin

public Constraint postMin(Var[] vars,
                          java.lang.String oper,
                          Var var)

Creates and posts a constraint: min(vars) "oper" var where max(vars) is a minimal variable in the array "vars" when they are all instantiated.

Specified by:: postMin in interface Problem

Parameters:: vars -; oper -; var -

postOr

public Constraint postOr(Constraint c1,
                         Constraint c2)

Creates and posts a constraint an "OR" Constraint. The Constraint "OR" is satisfied if at least one of constraints "c1" or "c2" are satisfied. The Constraint "OR" is not satisfied if both constraints "c1" or "c2" are not satisfied.

Specified by:: postOr in interface Problem

Parameters:: c1 - a Constraint; c2 - a Constraint
Returns:: a Constraint "OR" between the Constraints "c1" and "c2".

remove

public void remove(java.lang.String varName)

Removes a Var variable by "name".

Parameters:: varName - the name of the variable to be removed from the problem.

scalProd

public Var scalProd(int[] arrayOfValues,
                    VarList vars)

Specified by:: scalProd in interface Problem

setDomainType

public final void setDomainType(DomainType domainType)

Description copied from interface: Problem

Sets the domain type that will be used as the default for subsequent creation of variables using addVar-methods

Specified by:: setDomainType in interface Problem

setName

public final void setName(java.lang.String name)

Sets the problem name

Specified by:: setName in interface Problem

Parameters:: name -

setRealPrecision

public void setRealPrecision(double value)

Sets the precision for VarReals

Specified by:: setRealPrecision in interface Problem

Parameters:: value - the new precision for VarReals

setSolver

public void setSolver(Solver solver)

Associates a "solver" with the problem making it available through the method "getSolver()".

Specified by:: setSolver in interface Problem

Parameters:: solver -

sum

public Var sum(Var[] vars)

Returns a constrained integer variable that is constrained to be the sum of the variables in the array "vars".

Specified by:: sum in interface Problem

Parameters:: vars - the array of variables from which we desire the sum.
Returns:: a constrained integer variable that is equal to the sum of the variables in the array "var".

sum

public Var sum(VarList vars)

Returns a constrained integer variable that is constrained to be the sum of the variables in the VarList "vars".

Specified by:: sum in interface Problem

Parameters:: vars - the list of variables from which we desire the sum.
Returns:: a constrained integer variable that is equal to the sum of the variables in the array "var".

var

public Var var(java.lang.String name,
               java.lang.String symbolicExpression)

Creates a Var variable based on the symbolicExpression, adds this variable to the problem, and returns the newly added Var. If the returned Var is null, there is either an error inside the symbolicExpression or there is no concrete solver implementation of this method. In either case, the constraint will not have been added to the problem.

Parameters:: symbolicExpression - a string that defines a constrained expression that uses already defined variables.
Returns:: the Var variable created and added to the problem, or null if there is an error inside the symbolicExpression or if this method is not defined by a concrete solver implementation.

variable

public Var variable(int[] domain)

Description copied from interface: Problem

An equivalent of var("",domain)

Specified by:: variable in interface Problem

Parameters:: domain - an array specifying the values in the domain for the new Var.
Returns:: the Var variable created and added to the problem.

variable

public Var variable(int min,
                    int max)

Description copied from interface: Problem

Creates a Var with domain [min;max]. The variable will be created with the default domain type or by the latest call of the method setDomainType(). This variable has an empty name and is not added to the problem.

Specified by:: variable in interface Problem

Parameters:: min - the minimum value in the domain for the new Var.; max - the maximum value in the domain for the new Var.
Returns:: the Var created variable

variable

public Var variable(java.lang.String name,
                    int[] domain)

Creates a Var with the name "name", and domain int[]

Specified by:: variable in interface Problem

Parameters:: name - a string; domain - an array of integers
Returns:: the created variable

variable

public Var variable(java.lang.String name,
                    int min,
                    int max)

Description copied from interface: Problem

Creates a Var by calling createVariable(name,min,max) and adds this variable to the problem. The variable will be created with the default domain type or by the latest call of the method setDomainType().

Specified by:: variable in interface Problem

Parameters:: name - the name for the new Var.; min - the minimum value in the domain for the new Var.; max - the maximum value in the domain for the new Var.
Returns:: the Var variable created and added to the problem.

variable

public Var variable(java.lang.String name,
                    int min,
                    int max,
                    DomainType domainType)

Similar to variable(String name, int min, int max) but also has one more parameter that defines the default domain type

Specified by:: variable in interface Problem

Parameters:: name - the name for the new Var; min - the minimum value in the domain for the new Var; max - the maximum value in the domain for the new Var; domainType - DomainType
Returns:: the Var variable created and added to the problem

variableArray

public Var[] variableArray(java.lang.String name,
                           int min,
                           int max,
                           int size)

Adds an array of Var variables with the name "name" and domains [min;max] of domain type "type", adds this array of variables to the problem, and returns the newly added Var array. The "size" parameter specifies how many Var variables are contained in this new array.

Specified by:: variableArray in interface Problem

Parameters:: name - the name for the new Var array.; min - the minimum value in the domains for the new Vars in the new Var array.; max - the maximum value in the domain for the new Vars in the new Var array.; size - the number of Vars in the new Var array.
Returns:: the array of Var variables created and added to the problem.

variableBool

public VarBool variableBool()

Creates a bool var not added to the problem.

Specified by:: variableBool in interface Problem

Returns:: the Var variable created

variableBool

public abstract VarBool variableBool(java.lang.String name)

Creates a boolean constrained variable with the name "name" and adds this variable to the problem, and returns the newly added VarBool.

Specified by:: variableBool in interface Problem

Parameters:: name - the name for the new Var.
Returns:: the Var variable created and added to the problem.

variableList

public VarList variableList()

Specified by:: variableList in interface Problem

variableMatrix

public VarMatrix variableMatrix(java.lang.String name,
                                int min,
                                int max,
                                int rows,
                                int columns)

Specified by:: variableMatrix in interface Problem

variableReal

public VarReal variableReal(java.lang.String name)

Creates a VarReal with the name "name" and default domain [Double.MIN_VALUE+1;Double.MAX_VALUE-1], adds this variable to the problem, and returns the newly added VarReal.

Specified by:: variableReal in interface Problem

Parameters:: name - the name for the new VarReal.
Returns:: the VarReal variable created and added to the problem.

variableReal

public VarReal variableReal(java.lang.String name,
                            double min,
                            double max)

Creates a VarReal with the name "name" and domain [min;max], adds this variable to the problem, and returns the newly added VarReal.

Specified by:: variableReal in interface Problem

Parameters:: name - the name for the new VarReal.; min - the minimum value in the domain for the new VarReal.; max - the maximum value in the domain for the new VarReal.
Returns:: the VarReal variable created and added to the problem.

variableSet

public VarSet variableSet(java.lang.String name,
                          int[] values)
                   throws java.lang.Exception

Creates a constrained set variable VarSet with the name "name" and which domain consists of integer values from the array "value".

Specified by:: variableSet in interface Problem

Parameters:: name -; values -
Returns:: the VarSet variable created and added to the problem.
Throws:: java.lang.Exception

variableSet

public VarSet variableSet(java.lang.String name,
                          int min,
                          int max)
                   throws java.lang.Exception

Creates a constrained set variable VarSet with the name "name" and domain of integer values from "min" to "max" inclusive. This interface show how to create a new constrained set variable which, when bound, is equal to a set of elements. The domain of a constrained set variable is a set of Sets that consist of regular integers.The cardinality of a set constrained variable is an integer constrained variable.

Specified by:: variableSet in interface Problem

Parameters:: name -; min -; max -
Returns:: a new VarSet variable
Throws:: java.lang.Exception

variableSet

public VarSet variableSet(java.lang.String name,
                          java.util.Set set)
                   throws java.lang.Exception

Creates a constrained set variable VarSet with the name "name" and which domain consists of integer values from the Set "set".

Specified by:: variableSet in interface Problem

Parameters:: name -; set -
Returns:: the VarSet variable created and added to the problem.
Throws:: java.lang.Exception

variableString

public VarString variableString(java.lang.String name,
                                java.lang.String[] allStrings)

Specified by:: variableString in interface Problem

varSquare

public Var[] varSquare(java.lang.String name,
                       int min,
                       int max,
                       int size)

Creates a 2-dimensional array of Var variables, with dimensions "size"x"size". The array has name "name" and each Var in the array has domain[min;max] of default domain type. The array is added to the problem, and then the array is returned. If "name" is a non-null string "X" then each element [i,j] can be found by using Problem method getInt("X[i,j]"). The default domain type is Var.DOMAIN_SMALL, but the chosen implementation may override this default with its own default.

Parameters:: min - the minimum value in the domains for the new Vars in the new Var array.; max - the maximum value in the domain for the new Vars in the new Var array.; size - the dimensions of the new 2-dimensional array. The array contains size*size elements.
Returns:: the array of Var variables created and added to the problem.

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javax.constraints.impl Class AbstractProblem

AbstractProblem

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addReversible

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allDiff

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debug

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javax.constraints.impl
Class AbstractProblem