com.bea.p13n.expression.operator
Class ClassForName

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

All Implemented Interfaces

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

public final class ClassForName
extends Operator
implements UnaryOperator

Implementation of the ClassForName operator. Returns an newly constructed object by invoking a specified constructor.
Input 1: A String object (or expression that evaluates to a String) that defines the class name for the Class instance to be retrieved.
Returns: A Class instance for the named class.

See Also

Serialized Form

Field Summary

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

UNARY_OPERAND_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

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

ClassForName(Object name)
Constructs this by associating the given name.

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

ClassForName

public ClassForName()

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

ClassForName

public ClassForName(Object name)

Constructs this by associating the given name.

Parameters

name - A string object (or an expression that evaluates to a string), this string defines the name of the class to be loaded.

Method Detail

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.

getOperand

public Object getOperand()

Description copied from interface: UnaryOperator

Returns unary operand.

Specified by:

getOperand in interface UnaryOperator

Returns

An unary operand.