/*
* © Copyright IBM Corp. 2012-2013
*
* 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 com.ibm.commons.util;
/**
* Thread map, that maps an object to a thread.
* This class hide how data are stored and may have different implementation,
* depending on the JDK.
* @deprecated
* @ibm-not-published
*/
public class ThreadMap {
private static class Item {
private Item next;
private Thread thread;
private Object object;
Item( Thread thread, Object object ) {
this.thread = thread;
this.object = object;
}
}
private Item firstItem;
public ThreadMap() {
}
public boolean hasItems() {
return firstItem!=null;
}
public synchronized void clear() {
this.firstItem = null;
}
public synchronized void remove(Thread thread) {
if( firstItem!=null ) {
if( firstItem.thread==thread ) {
firstItem = firstItem.next;
} else {
for( Item it=firstItem; it.next!=null; it=it.next ) {
if( it.next.thread==thread ) {
it.next = it.next.next;
break;
}
}
}
return;
}
}
public Object get(Thread thread) {
for( Item it=firstItem; it!=null; it=it.next ) {
if( it.thread==thread ) {
return it.object;
}
}
return null;
}
public synchronized void put( Thread thread, Object object ) {
if( object!=null ) {
for( Item it=firstItem; it!=null; it=it.next ) {
if( it.thread==thread ) {
it.object = object;
return;
}
}
Item item = new Item( thread, object );
item.next = firstItem;
firstItem = item;
} else {
remove(thread);
}
}
}