ArrayClassFactory.java

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 * 
 * ----------------------
 * ArrayClassFactory.java
 * ----------------------
 * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: ArrayClassFactory.java,v 1.2 2005/10/18 13:31:58 mungady Exp $
 *
 * Changes (from 19-Feb-2003)
 * -------------------------
 * 06-May-2003 : Initial version
 */
package org.jfree.xml.factory.objects;

import java.util.ArrayList;
import java.util.Iterator;

import org.jfree.util.Configuration;

/**
 * An class that implements the {@link ClassFactory} interface to
 * create Arrays of objects. The object descriptions are created on
 * demand.
 *
 * @author Thomas Morgner.
 */
public class ArrayClassFactory implements ClassFactory {

    /**
     * Default constructor.
     */
    public ArrayClassFactory() {
        super();
    }

    /**
     * Returns an object description for a class.
     *
     * @param c  the class.
     *
     * @return The object description.
     */
    public ObjectDescription getDescriptionForClass(final Class c) {
        if (!c.isArray()) {
            return null;
        }
        else {
            return new ArrayObjectDescription(c);
        }
    }

    /**
     * Returns an object description for the super class of a class.
     * This method always returns null.
     *
     * @param d  the class.
     * @param knownSuperClass the last known super class or null.
     *
     * @return The object description.
     */
    public ObjectDescription getSuperClassObjectDescription
        (final Class d, final ObjectDescription knownSuperClass) {
        return null;
    }

    /**
     * Returns an iterator for the registered classes. This returns a list
     * of pre-registered classes known to this ClassFactory. A class may be able
     * to handle more than the registered classes.
     * <p>
     * This method exists to support query tools for UI design, do not rely on it
     * for day to day work.
     *
     * @return The iterator.
     */
    public Iterator getRegisteredClasses() {
        final ArrayList l = new ArrayList();
        l.add(Object[].class);
        return l.iterator();
    }

    /**
     * Configures this factory. The configuration contains several keys and
     * their defined values. The given reference to the configuration object
     * will remain valid until the report parsing or writing ends.
     * <p>
     * The configuration contents may change during the reporting.
     *
     * @param config the configuration, never null
     */
    public void configure(final Configuration config) {
        // nothing required
    }

    /**
     * ArrayClassFactories are always equal, there is nothing that could
     * not be equal :)
     *
     * @param o the other object.
     * @return true, if both object factories describe the same objects, false otherwise.
     */
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ArrayClassFactory)) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code value for the object. This method is
     * supported for the benefit of hashtables such as those provided by
     * <code>java.util.Hashtable</code>.
     *
     * @return the computed hashcode.
     */
    public int hashCode() {
        return getClass().hashCode();
    }
}