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

java.lang.Object
  extended by com.bea.p13n.expression.internal.ComplexExpressionImpl
      extended by com.bea.p13n.expression.operator.Operator
          extended by com.bea.p13n.expression.operator.comparative.ComparativeOperator
All Implemented Interfaces
Expression, com.bea.p13n.expression.ExpressionEvents, BinaryOperator, Serializable, Cloneable
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
 
Fields inherited from interface com.bea.p13n.expression.ExpressionEvents
EVENT_ADD_SUBEXPRESSION, EVENT_CLEAR_CACHE, EVENT_INTERNAL_MAX, EVENT_REMOVE_SUBEXPRESSION, EVENT_SET_CACHE_ENABLED, EVENT_SET_CACHED_VALUE, EVENT_SET_PARENT, EVENT_SET_SOURCE, EVENT_SET_SUBEXPRESSION, EVENT_SET_USER_DATA
 
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.

Parameters
lhs - The left hand side operand of this operator.
rhs - The right hand side operand of this operator.
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.

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.

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.


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