org.apache.commons.jexl2.introspection

Class UberspectImpl.ConstructorMethod

java.lang.Object

org.apache.commons.jexl2.introspection.UberspectImpl.ConstructorMethod

All Implemented Interfaces:

JexlMethod

Enclosing class:

UberspectImpl

private final class UberspectImpl.ConstructorMethod
extends java.lang.Object
implements JexlMethod

A JexlMethod that wraps constructor.

Since:

2.1

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.reflect.Constructor<?>	ctor The wrapped constructor.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ConstructorMethod(java.lang.reflect.Constructor<?> theCtor) Creates a constructor method.

Method Summary

Modifier and Type	Method and Description
java.lang.Class<?>	getReturnType() returns the return type of the method invoked.
java.lang.Object	invoke(java.lang.Object obj, java.lang.Object[] params) Invocation method, called when the method invocation should be performed and a value returned.
boolean	isCacheable() Specifies if this JexlMethod is cacheable and able to be reused for this class of object it was returned for.
boolean	tryFailed(java.lang.Object rval) Checks whether a tryInvoke failed or not.
java.lang.Object	tryInvoke(java.lang.String name, java.lang.Object obj, java.lang.Object[] params) Attempts to reuse this JexlMethod, checking that it is compatible with the actual set of arguments.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ctor

private final java.lang.reflect.Constructor<?> ctor

The wrapped constructor.

Constructor Detail

ConstructorMethod

private ConstructorMethod(java.lang.reflect.Constructor<?> theCtor)

Creates a constructor method.

Parameters:

theCtor - the constructor to wrap

Method Detail

invoke

public java.lang.Object invoke(java.lang.Object obj,
                               java.lang.Object[] params)
                        throws java.lang.Exception

Invocation method, called when the method invocation should be performed and a value returned.

Specified by:

invoke in interface JexlMethod

Parameters:

obj - the object

params - method parameters.

Returns:

the result

Throws:

java.lang.Exception - on any error.

tryInvoke

public java.lang.Object tryInvoke(java.lang.String name,
                                  java.lang.Object obj,
                                  java.lang.Object[] params)

Attempts to reuse this JexlMethod, checking that it is compatible with the actual set of arguments. Related to isCacheable since this method is often used with cached JexlMethod instances.

Specified by:

tryInvoke in interface JexlMethod

Parameters:

name - the method name

obj - the object to invoke the method upon

params - the method arguments

Returns:

the result of the method invocation that should be checked by tryFailed to determine if it succeeded or failed.

tryFailed

public boolean tryFailed(java.lang.Object rval)

Checks whether a tryInvoke failed or not.

Specified by:

tryFailed in interface JexlMethod

Parameters:

rval - the value returned by tryInvoke

Returns:

true if tryInvoke failed, false otherwise

isCacheable

public boolean isCacheable()

Specifies if this JexlMethod is cacheable and able to be reused for this class of object it was returned for.

Specified by:

isCacheable in interface JexlMethod

Returns:

true if can be reused for this class, false if not

getReturnType

public java.lang.Class<?> getReturnType()

returns the return type of the method invoked.

Specified by:

getReturnType in interface JexlMethod

Returns:

return type