com.bea.p13n.expression.operator.comparative
Class ComparativeOperator

java.lang.Object
  com.bea.p13n.expression.internal.ComplexExpressionImpl
      com.bea.p13n.expression.operator.Operator
          com.bea.p13n.expression.operator.comparative.ComparativeOperator

All Implemented Interfaces:

BinaryOperator, Cloneable, Expression, com.bea.p13n.expression.ExpressionEvents, Serializable

Direct Known Subclasses:

Equals, GreaterOrEquals, GreaterThan, LessOrEquals, LessThan, NotEquals

public abstract class ComparativeOperator

extends Operator

implements BinaryOperator

Abstract base class for all Comparative Operators.

See Also:

Serialized Form

Field Summary

Fields inherited from interface com.bea.p13n.expression.operator.BinaryOperator

LHS_INDEX, RHS_INDEX

Constructor Summary

protected	ComparativeOperator() Allocates a ComparativeOperator object.
protected	ComparativeOperator(Object lhs, Object rhs) Allocates a ComparativeOperator object by associating the given two operands.

Method Summary

Object	getLeftHandSide() Returns left hand side operand of this binary operator.
Class[]	getParameterSignature() Returns the parameter signature for this Expression.
Object	getRightHandSide() Returns right hand side operand of this binary operator.

Methods inherited from class com.bea.p13n.expression.operator.Operator

leftHandSide, operand, rightHandSide

Methods inherited from class com.bea.p13n.expression.internal.ComplexExpressionImpl

addListener, addSubExpression, clearCache, clone, createProxyExpression, equals, getCachedValue, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, hashCode, isCached, isCacheEnabled, isEqualitySubExpression, notifyListeners, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setParent, setSource, setSubExpression, setUserData, toString, write

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ComparativeOperator

protected ComparativeOperator()

Allocates a ComparativeOperator object.

ComparativeOperator

protected ComparativeOperator(Object lhs,
                              Object rhs)

Allocates a ComparativeOperator object by associating the given two operands.

Method Detail

getLeftHandSide

public final Object getLeftHandSide()

Description copied from interface: BinaryOperator

Returns left hand side operand of this binary operator.

Specified by:

getLeftHandSide in interface BinaryOperator

Returns:

The left hand side operand.

getParameterSignature

public Class[] getParameterSignature()

Description copied from interface: Expression

Returns the parameter signature for this Expression. Because the sub-expressions within the Expression are typically arguments or operands, some type validation is performed by examining the class types of the sub-expressions against the Expression's parameter signature.
The tests that are performed are:
1. The number of sub-expressions must equals the number of parameter entries.
2. The class type of any sub-expression (or the result of evaluating the sub-expresssion) must equal the class type of the corresponding parameter entry.
3. Any null parameter entries are ignored and are considered optional sub-expressions.

Specified by:

getParameterSignature in interface Expression

Returns:

the Class array containing the parameter signature.

getRightHandSide

public final Object getRightHandSide()

Description copied from interface: BinaryOperator

Returns right hand side operand of this binary operator.

Specified by:

getRightHandSide in interface BinaryOperator

Returns:

The left hand side operand.