org.apache.juneau.internal.IdentityList Maven / Gradle / Ivy
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// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file *
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// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance *
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// * *
// * http://www.apache.org/licenses/LICENSE-2.0 *
// * *
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// ***************************************************************************************************************************
package org.apache.juneau.internal;
import java.util.*;
/**
* Combination of a {@link LinkedList} and IdentitySet.
*
*
* -
* Duplicate objects (by identity) will be skipped during insertion.
*
-
* Order of insertion maintained.
*
*
* Notes:
*
* - This class is NOT thread safe, and is intended for use on small lists.
*
*
* @param Entry type.
*/
public class IdentityList extends LinkedList {
private static final long serialVersionUID = 1L;
@Override /* List */
public boolean add(T t) {
for (T t2 : this)
if (t2 == t)
return false;
super.add(t);
return true;
}
@Override /* List */
public boolean contains(Object t) {
for (T t2 : this)
if (t2 == t)
return true;
return false;
}
}