org.glassfish.grizzly.ChainProcessorSelector Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
/**
* {@link ProcessorSelector} implementation, which acts like wrapper for chain
* of {@link ProcessorSelector}s.
* So, when {@link ProcessorSelector#select(IOEvent, Connection)} operation is
* called - it delegates selecting to the first {@link ProcessorSelector} from
* chain. If first {@link ProcessorSelector} returns not null
* {@link Processor} - {@link ChainProcessorSelector} returns it as result,
* otherwise next {@link ProcessorSelector} will be taken from chain... etc
*
* @author Alexey Stashok
*/
public class ChainProcessorSelector implements ProcessorSelector,
List {
private final List selectorChain;
public ChainProcessorSelector() {
this(new ArrayList());
}
public ChainProcessorSelector(ProcessorSelector... selectorChain) {
this(new ArrayList(Arrays.asList(selectorChain)));
}
public ChainProcessorSelector(List selectorChain) {
this.selectorChain = selectorChain;
}
/**
* {@inheritDoc}
*/
@Override
public Processor select(IOEvent ioEvent,
Connection connection) {
for(ProcessorSelector processorSelector : selectorChain) {
Processor processor = processorSelector.select(ioEvent, connection);
if (processor != null) {
return processor;
}
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public int size() {
return selectorChain.size();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isEmpty() {
return selectorChain.isEmpty();
}
/**
* {@inheritDoc}
*/
@Override
public boolean contains(Object o) {
return selectorChain.contains(o);
}
/**
* {@inheritDoc}
*/
@Override
public Iterator iterator() {
return selectorChain.iterator();
}
/**
* {@inheritDoc}
*/
@Override
public Object[] toArray() {
return selectorChain.toArray();
}
/**
* {@inheritDoc}
*/
@Override
public T[] toArray(T[] a) {
return selectorChain.toArray(a);
}
/**
* {@inheritDoc}
*/
@Override
public boolean add(ProcessorSelector o) {
return selectorChain.add(o);
}
/**
* {@inheritDoc}
*/
@Override
public boolean remove(Object o) {
return selectorChain.remove(o);
}
/**
* {@inheritDoc}
*/
@Override
public boolean containsAll(Collection c) {
return selectorChain.containsAll(c);
}
/**
* {@inheritDoc}
*/
@Override
public boolean addAll(Collection c) {
return selectorChain.addAll(c);
}
/**
* {@inheritDoc}
*/
@Override
public boolean addAll(int index,
Collection c) {
return selectorChain.addAll(index, c);
}
/**
* {@inheritDoc}
*/
@Override
public boolean removeAll(Collection c) {
return selectorChain.removeAll(c);
}
/**
* {@inheritDoc}
*/
@Override
public boolean retainAll(Collection c) {
return selectorChain.retainAll(c);
}
/**
* {@inheritDoc}
*/
@Override
public void clear() {
selectorChain.clear();
}
/**
* {@inheritDoc}
*/
@Override
public ProcessorSelector get(int index) {
return selectorChain.get(index);
}
/**
* {@inheritDoc}
*/
@Override
public ProcessorSelector set(int index,
ProcessorSelector element) {
return selectorChain.set(index, element);
}
/**
* {@inheritDoc}
*/
@Override
public void add(int index, ProcessorSelector element) {
selectorChain.add(index, element);
}
/**
* {@inheritDoc}
*/
@Override
public ProcessorSelector remove(int index) {
return selectorChain.remove(index);
}
/**
* {@inheritDoc}
*/
@Override
public int indexOf(Object o) {
return selectorChain.indexOf(o);
}
/**
* {@inheritDoc}
*/
@Override
public int lastIndexOf(Object o) {
return selectorChain.lastIndexOf(o);
}
/**
* {@inheritDoc}
*/
@Override
public ListIterator listIterator() {
return selectorChain.listIterator();
}
/**
* {@inheritDoc}
*/
@Override
public ListIterator listIterator(int index) {
return selectorChain.listIterator(index);
}
/**
* {@inheritDoc}
*/
@Override
public List subList(int fromIndex, int toIndex) {
return selectorChain.subList(fromIndex, toIndex);
}
}