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

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

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

public final class ClassNewInstance
extends Operator

Implementation of the ClassNewInstance operator. Returns an newly constructed object by invoking a specified constructor.
Input 1: A Class object (or expression that evaluates to a Class) that defines the Class that should be created.
Input 2: A Class[] (or expression that evaluates to a Class[]) that defines the signature of the constructor that should be invoked. If input 2 is null the operator will attempt to deduce the constructor to call from the arguments (input 3).
Input 3: A Object[] (or expression that evaluates to a Object[]) that contains the arguments that should be passed to the constructor.
Returns: A new instance of the class, instantiated with the constructor of the provided signature using the supplied arguments..

See Also:
  Serialized Form

Constructor Summary
`ClassNewInstance()` Constructs an empty operator and operands can be added later by calling addSubExpression() on this.
`ClassNewInstance(Object clazz, Object constructorSignature, Object args)` Constructs this with the given `clazz`, `constructorSignature`

Method Summary
`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

### ClassNewInstance

    public ClassNewInstance()

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

### ClassNewInstance

    public ClassNewInstance(Object clazz,
                            Object constructorSignature,
                            Object args)

  Constructs this with the given `clazz`, `constructorSignatureargs` parameters.

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.

  Returns:
    the Class array containing the parameter signature.

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Copyright © 2005 BEA Systems, Inc. All Rights Reserved