org.apache.openjpa.kernel.exps
Class ContainsExpression

java.lang.Object
  org.apache.openjpa.kernel.exps.Exp
      org.apache.openjpa.kernel.exps.ContainsExpression

All Implemented Interfaces:

Serializable, Expression

Direct Known Subclasses:

ContainsKeyExpression, ContainsValueExpression

 class ContainsExpression
extends Exp

Tests that a Collection contains a value.

Author:

Abe White

Constructor Summary

ContainsExpression(Val val1, Val val2)
Constructor.

Method Summary

void	acceptVisit(ExpressionVisitor visitor) Accept a visit from a tree visitor.
protected boolean	eval(Collection candidates, StoreContext ctx, Object[] params) Evaluate the expression for the given group.
protected boolean	eval(Object candidate, Object orig, StoreContext ctx, Object[] params) Evaluate the expression for the given context candidate and original candidate.
protected Collection	getCollection(Object obj) Return the container collection for the given value.

Methods inherited from class org.apache.openjpa.kernel.exps.Exp

evaluate, evaluate

Methods inherited from class java.lang.Object

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

Constructor Detail

ContainsExpression

public ContainsExpression(Val val1,
                          Val val2)

Constructor.

Parameters:

val1 - the container value

val2 - the containee to test

Method Detail

eval

protected boolean eval(Object candidate,
                       Object orig,
                       StoreContext ctx,
                       Object[] params)

Description copied from class: Exp

Evaluate the expression for the given context candidate and original candidate.

Overrides:

eval in class Exp

eval

protected boolean eval(Collection candidates,
                       StoreContext ctx,
                       Object[] params)

Description copied from class: Exp

Evaluate the expression for the given group.

Overrides:

eval in class Exp

getCollection

protected Collection getCollection(Object obj)

Return the container collection for the given value.

acceptVisit

public void acceptVisit(ExpressionVisitor visitor)

Description copied from interface: Expression

Accept a visit from a tree visitor.

Specified by:

acceptVisit in interface Expression

Overrides:

acceptVisit in class Exp