org.apache.openjpa.kernel.exps
Class CompareExpression

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

All Implemented Interfaces:

Serializable, Expression

Direct Known Subclasses:

EndsWithExpression, EqualExpression, GreaterThanEqualExpression, GreaterThanExpression, LessThanEqualExpression, LessThanExpression, MatchesExpression, NotEqualExpression, StartsWithExpression

abstract class CompareExpression
extends Exp

Expression that compares two others.

Author:

Abe White

Constructor Summary

CompareExpression(Val val1, Val val2)
Constructor.

Method Summary

void	acceptVisit(ExpressionVisitor visitor) Accept a visit from a tree visitor.
protected abstract boolean	compare(Object o1, Object o2) Compare the two values.
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.

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

CompareExpression

public CompareExpression(Val val1,
                         Val val2)

Constructor. Supply values to compare.

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

compare

protected abstract boolean compare(Object o1,
                                   Object o2)

Compare the two values.

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