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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.java.sip.communicator.impl.protocol.irc;
/**
* Small container class that can contain a result and/or an exception.
*
* The container can be used for synchronizing between threads and
* simultaneously provide a container for storing a result and/or an exception
* that occurred within the separate thread that should be passed on to the
* calling thread.
*
* @author Danny van Heumen
*
* @param <T> type of the value
* @param <E> type of the exception
*/
public class Result<T, E extends Exception>
{
/**
* Boolean flag done.
*/
private boolean done = false;
/**
* The result.
*/
private T value = null;
/**
* The (possible) exception.
*/
private E exception = null;
/**
* Constructor for result without initial value.
*/
public Result()
{
}
/**
* Constructor for result with initial value.
*
* @param initialValue initial value
*/
public Result(final T initialValue)
{
this.value = initialValue;
}
/**
* Check whether it is actually done.
*
* @return return true when done or false otherwise
*/
public boolean isDone()
{
return this.done;
}
/**
* Set done without setting anything else.
*/
public void setDone()
{
this.done = true;
}
/**
* Set done and provide a result.
*
* @param value the result
*/
public void setDone(final T value)
{
this.value = value;
this.setDone();
}
/**
* Set done and provide an exception.
*
* @param exception the exception
*/
public void setDone(final E exception)
{
this.exception = exception;
this.setDone();
}
/**
* Set done and set both result and exception.
*
* @param value the value
* @param exception the exception
*/
public void setDone(final T value, final E exception)
{
this.value = value;
this.exception = exception;
this.setDone();
}
/**
* Get the value.
*
* @return return the value
*/
public T getValue()
{
return this.value;
}
/**
* Get the exception.
*
* @return return the exception
*/
public E getException()
{
return this.exception;
}
}
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