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## com.bea.p13n.expression.operator
Class ObjectGetClass

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

All Implemented Interfaces:
  Cloneable, Expression, com.bea.p13n.expression.ExpressionEvents, Serializable, UnaryOperator

public final class ObjectGetClass
extends Operator
implements UnaryOperator

Implementation of the ObjectGetClass operator. Returns the Class object for an Object instance.
Input 1: An Object or Expression returning an Object.
Returns: A Class that is the result of calling getClass on the Object.

See Also:
  Serialized Form

Field Summary

Fields inherited from interface com.bea.p13n.expression.operator.UnaryOperator
`UNARY_OPERAND_INDEX`

Constructor Summary
`ObjectGetClass()` Constructs an empty operator and operands can be added later by calling addSubExpression() on this.
`ObjectGetClass(Object obj)` Constructs this by associating the given parameters as an operand of this.

Method Summary
`Object` | `getOperand()` Returns unary operand.
`Class[]` | `getParameterSignature()` Returns the parameter signature for this `Expression`.

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

### ObjectGetClass

    public ObjectGetClass()

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

### ObjectGetClass

    public ObjectGetClass(Object obj)

  Constructs this by associating the given parameters as an operand of this.

Method Detail

### getOperand

    public Object getOperand()

  Description copied from interface: `UnaryOperator`
  Returns unary operand.

  Specified by:
    `getOperand` in interface `UnaryOperator`
  Returns:
    An unary 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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Copyright © 2004 BEA Systems, Inc. All Rights Reserved