AddExpressionFactory

java.lang.Object
- org.projog.core.predicate.AbstractSingleResultPredicate
- - org.projog.core.predicate.builtin.clp.AddExpressionFactory

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory
```
public final class AddExpressionFactory
extends AbstractSingleResultPredicate
```
pj_add_clp_expression(X,Y) - defines a Java class as an CLP expression.
X represents the name and arity of the expression. Y represents the full class name of an implementation of org.projog.core.predicate.builtin.clp.ExpressionFactory.

Field Summary

Fields
Modifier and Type Field Description

private ExpressionFactories expressions

Constructor Summary

Constructors
Constructor Description

AddExpressionFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected boolean`	`evaluate(Term functionNameAndArity, Term javaClass)`
`protected void`	`init()`	This method is called by `AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase)`.

Methods inherited from class org.projog.core.predicate.AbstractSingleResultPredicate
evaluate, evaluate, evaluate, evaluate, evaluate, getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, getPredicate, getPredicates, getProjogListeners, getSpyPoints, getTermFormatter, isRetryable, setKnowledgeBase

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

Methods inherited from interface org.projog.core.predicate.PredicateFactory
isAlwaysCutOnBacktrack

- Field Detail
  - expressions
```
private ExpressionFactories expressions
```
- Constructor Detail
  - AddExpressionFactory
```
public AddExpressionFactory()
```
- Method Detail
  - evaluate
```
protected boolean evaluate(Term functionNameAndArity,
                           Term javaClass)
```
    Overrides:
    
    evaluate in class AbstractSingleResultPredicate
  - init
```
protected void init()
```
    Description copied from class: AbstractSingleResultPredicate
    
    This method is called by AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase).
    Can be overridden by subclasses to perform initialisation before any calls to AbstractSingleResultPredicate.evaluate(Term...) are made. As AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase) will have already been called before this method is invoked, overridden versions will be able to access the KnowledgeBase using AbstractSingleResultPredicate.getKnowledgeBase().
    
    Overrides:
    
    init in class AbstractSingleResultPredicate