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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
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...
*/
public class MethodInvocation
{
//the method to invoke.
private Method mMethod;
//the object to invoke the method on.
private Object mObject;
//with one Parameter / without
private 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) : obj.getClass().getMethod(methodName, paramClass), obj, paramClass);
}
private 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, param);
}
else
{
return mMethod.invoke(mObject);
}
}
/**
* 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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