net.sf.jec
Class InvertibleOperator

java.lang.Object
  net.sf.jec.Operator
      net.sf.jec.InvertibleOperator

Direct Known Subclasses:

AccessorOperator, IndexerOperator

public abstract class InvertibleOperator

extends Operator

Abstract class parent of every invertible operator. An invertible operator is an operator able to perform the inverse function. Thus, being y=OP.apply(x) is true that x=OP.applyInverse(y)

Author:

mballesteros

Field Summary

Fields inherited from class net.sf.jec.Operator

argOps, nestedOp, showFunctionString

Constructor Summary

InvertibleOperator()
Creates a new operator that nest another operator

InvertibleOperator(Operator nestedOp)
Creates a new operator that nest another operator

Method Summary

void	applyInverse(java.lang.Object rootCtx, java.lang.Object ctx, java.lang.Object value)
protected abstract void	inverseMap(java.lang.Object rootCtx, java.lang.Object ctx, java.lang.Object value) Sets the given value if this operator is at the end of the operator chain or just resolves the context object and passes it to the next operator in the chain.

Methods inherited from class net.sf.jec.Operator

apply, directMap, setArgumentOperators, setNestedOperator, toExpressionString, toFunctionString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

InvertibleOperator

public InvertibleOperator()

Creates a new operator that nest another operator

InvertibleOperator

public InvertibleOperator(Operator nestedOp)

Creates a new operator that nest another operator

Method Detail

applyInverse

public final void applyInverse(java.lang.Object rootCtx,
                               java.lang.Object ctx,
                               java.lang.Object value)
                        throws EvaluationException

Throws:

EvaluationException

inverseMap

protected abstract void inverseMap(java.lang.Object rootCtx,
                                   java.lang.Object ctx,
                                   java.lang.Object value)
                            throws EvaluationException

Sets the given value if this operator is at the end of the operator chain or just resolves the context object and passes it to the next operator in the chain.

Parameters:

rootCtx - The root context, needed for operators that require expression evaluation from root point. Example: Indexer operators

ctx - The current context where the operator will work over

value - The value to set.

Throws:

EvaluationException