com.bea.p13n.expression.operator.string
Class StringConcat

java.lang.Object
  com.bea.p13n.expression.internal.ComplexExpressionImpl
      com.bea.p13n.expression.operator.Operator
          com.bea.p13n.expression.operator.string.StringOperator
              com.bea.p13n.expression.operator.string.StringConcat

All Implemented Interfaces

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

public final class StringConcat
extends StringOperator
implements BinaryOperator

Implementation of the MathSubtract operator.
Input 1: A String (or Expression returning a String) that is LHS of the operator.
Input 2: A String (or Expression returning a String) that is RHS of the operator.
Returns: A String: LHS.concat( RHS ).

See Also

Serialized Form

Field Summary

Fields inherited from class com.bea.p13n.expression.operator.string.StringOperator

BINARY_PARAMETER_SIGNATURE, UNARY_PARAMETER_SIGNATURE

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

StringConcat(Object lhs, Object rhs)

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

StringConcat

public StringConcat(Object lhs,
                    Object rhs)

Method Detail

getLeftHandSide

public 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 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.