001: /* ========================================================================
002: * JCommon : a free general purpose class library for the Java(tm) platform
003: * ========================================================================
004: *
005: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006: *
007: * Project Info: http://www.jfree.org/jcommon/index.html
008: *
009: * This library is free software; you can redistribute it and/or modify it
010: * under the terms of the GNU Lesser General Public License as published by
011: * the Free Software Foundation; either version 2.1 of the License, or
012: * (at your option) any later version.
013: *
014: * This library is distributed in the hope that it will be useful, but
015: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017: * License for more details.
018: *
019: * You should have received a copy of the GNU Lesser General Public
020: * License along with this library; if not, write to the Free Software
021: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022: * USA.
023: *
024: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025: * in the United States and other countries.]
026: *
027: * ---------------
028: * ObjectList.java
029: * ---------------
030: * (C)opyright 2003, 2004, by Object Refinery Limited and Contributors.
031: *
032: * Original Author: David Gilbert (for Object Refinery Limited);
033: * Contributor(s): -;
034: *
035: * $Id: ObjectList.java,v 1.6 2005/11/14 10:56:42 mungady Exp $
036: *
037: * Changes
038: * -------
039: * 17-Jul-2003 : Version 1 (DG);
040: * 13-Aug-2003 : Refactored to extend AbstractObjectList (DG);
041: * 21-Oct-2004 : removed duplicate interface declarations and empty methods.
042: * 22-Oct-2004 : Restored removed methods - see note in code (DG);
043: *
044: */
045:
046: package org.jfree.util;
047:
048: /**
049: * A list of objects that can grow as required.
050: * <p>
051: * When cloning, the objects in the list are NOT cloned, only the references.
052: *
053: * @author Thomas Morgner
054: */
055: public class ObjectList extends AbstractObjectList {
056:
057: /**
058: * Default constructor.
059: */
060: public ObjectList() {
061: }
062:
063: /**
064: * Creates a new list.
065: *
066: * @param initialCapacity the initial capacity.
067: */
068: public ObjectList(final int initialCapacity) {
069: super (initialCapacity);
070: }
071:
072: // NOTE: the methods below look redundant, but their purpose is to provide public
073: // access to the the get(), set() and indexOf() methods defined in the
074: // AbstractObjectList class, for this class only. For other classes
075: // (e.g. PaintList, ShapeList etc) we don't want the Object versions of these
076: // methods to be visible in the public API.
077:
078: /**
079: * Returns the object at the specified index, if there is one, or <code>null</code>.
080: *
081: * @param index the object index.
082: *
083: * @return The object or <code>null</code>.
084: */
085: public Object get(final int index) {
086: return super .get(index);
087: }
088:
089: /**
090: * Sets an object reference (overwriting any existing object).
091: *
092: * @param index the object index.
093: * @param object the object (<code>null</code> permitted).
094: */
095: public void set(final int index, final Object object) {
096: super .set(index, object);
097: }
098:
099: /**
100: * Returns the index of the specified object, or -1 if the object is not in the list.
101: *
102: * @param object the object.
103: *
104: * @return The index or -1.
105: */
106: public int indexOf(final Object object) {
107: return super.indexOf(object);
108: }
109:
110: }
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