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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package com.sun.star.wizards.ui.event;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* Encapsulate a Method invocation.
* In the constructor one defines a method, a target object and an optional
* Parameter.
* Then one calls "invoke", with or without a parameter. <br/>
* Limitations: I do not check anything myself. If the param is not ok, from the
* wrong type, or the mothod doesnot exist on the given object.
* You can trick this class howmuch you want: it will all throw exceptions
* on the java level. i throw no error warnings or my own excceptions...
* @author rpiterman
*/
public class MethodInvocation
{
static final Class[] EMPTY_ARRAY =
{
};
//the method to invoke.
Method mMethod;
//the object to invoke the method on.
Object mObject;
//with one Parameter / without
boolean mWithParam;
/** Creates a new instance of MethodInvokation */
public MethodInvocation(String methodName, Object obj) throws NoSuchMethodException
{
this(methodName, obj, null);
}
public MethodInvocation(Method method, Object obj)
{
this(method, obj, null);
}
public MethodInvocation(String methodName, Object obj, Class paramClass) throws NoSuchMethodException
{
this(paramClass == null ? obj.getClass().getMethod(methodName, null) : obj.getClass().getMethod(methodName, new Class[]
{
paramClass
}), obj, paramClass);
}
public MethodInvocation(Method method, Object obj, Class paramClass)
{
mMethod = method;
mObject = obj;
mWithParam = !(paramClass == null);
}
/**
* Returns the result of calling the method on the object, or null, if no result.
*/
public Object invoke(Object param) throws IllegalAccessException, InvocationTargetException
{
if (mWithParam)
{
return mMethod.invoke(mObject, new Object[]
{
(Object) param
});
}
else
{
return mMethod.invoke(mObject, EMPTY_ARRAY);
}
}
/**
* This method is a convenience method.
* It is the same as calling invoke(null);
*/
public Object invoke() throws IllegalAccessException, InvocationTargetException
{
return invoke(null);
}
}
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