Instanceof Class

com.bea.p13n.expression.operator
Instanceof Class

public final class Instanceof

    extends Operator
    implements BinaryOperator

Implementation of the Instanceof operator. Returns a Boolean if the Object parameter (which can be an expression) is an instance of a class type.
Input 1: An object or Expression returning an object.
Input 2: A Class or an Expression returning a Class
Returns: A Boolean that is the result of testing the object against the Class.

Hierarchy
Object
  ComplexExpressionImpl
    Operator
      Instanceof
All Implemented Interfaces

BinaryOperator, Cloneable, Expression, Serializable

Constructor Summary
Instanceof()

Constructs an empty operator and operands can be added later by calling addSubExpression() on this.
Instanceof(Object obj, Class clazz)

Constructs this by associating the given parameters as operands.
 

Method Summary
public Object
getLeftHandSide()
Returns left hand side operand of this binary operator.
public Class[]
getParameterSignature()
Returns the parameter signature for this Expression.
public Object
getRightHandSide()
Returns right hand side operand of this binary operator.
public Object
getTargetClass()
Returns Class operand of this operator.
public Object
getTargetObject()
Returns Object operand of this operator.
 
Methods from  com.bea.p13n.expression.operator.Operator
leftHandSide, operand, rightHandSide
 
Methods from  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 from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
   
Methods from interface com.bea.p13n.expression.operator.BinaryOperator
getLeftHandSide, getRightHandSide
 
Methods from interface com.bea.p13n.expression.Expression
accept, addListener, addSubExpression, clearCache, clone, getCachedValue, getParameterSignature, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, isCached, isCacheEnabled, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setSource, setSubExpression, setUserData, write
 

Constructor Detail

Instanceof

public Instanceof()
Constructs an empty operator and operands can be added later by calling addSubExpression() on this.

Instanceof

public Instanceof(Object obj, 
                  Class clazz)
Constructs this by associating the given parameters as operands.
 

Method Detail

getLeftHandSide() Method

public Object getLeftHandSide()
Description copied from BinaryOperator.getLeftHandSide()
Returns left hand side operand of this binary operator.

Returns

The left hand side operand.

getParameterSignature() Method

public Class[] getParameterSignature()
Description copied from Expression.getParameterSignature()
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.

Returns

the Class array containing the parameter signature.

getRightHandSide() Method

public Object getRightHandSide()
Description copied from BinaryOperator.getRightHandSide()
Returns right hand side operand of this binary operator.

Returns

The left hand side operand.

getTargetClass() Method

public Object getTargetClass()
Returns Class operand of this operator.

Returns

Object representing a Class operand of this.

getTargetObject() Method

public Object getTargetObject()
Returns Object operand of this operator.

Returns

Object An Object or Expression that is used as an Object operand of this.