1 package org.apache.torque.util;
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19 import java.util.ArrayList;
20
21 /***
22 * List with unique entries. UniqueList does not allow null nor duplicates.
23 *
24 * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a>
25 * @version $Id: UniqueList.java 239630 2005-08-24 12:25:32Z henning $
26 */
27 public class UniqueList extends ArrayList
28 {
29 /***
30 * Adds an Object to the list.
31 *
32 * @param o the Object to add
33 * @return true if the Object is added
34 */
35 public boolean add(Object o)
36 {
37 if (o != null && !contains(o))
38 {
39 return super.add(o);
40 }
41 return false;
42 }
43 }