Java tutorial
/* * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. * * This software is open source. * See the bottom of this file for the licence. */ package org.dom4j.tree; import org.dom4j.Element; import org.dom4j.Node; import java.util.Collections; import java.util.Map; /** * <p> * <code>FlyweightProcessingInstruction</code> is a Flyweight pattern * implementation of a singly linked, read-only XML Processing Instruction. * </p> * * <p> * This node could be shared across documents and elements though it does not * support the parent relationship. * </p> * * @author <a href="mailto:jstrachan@apache.org">James Strachan </a> * @version $Revision: 1.7 $ */ public class FlyweightProcessingInstruction extends AbstractProcessingInstruction { /** The target of the PI */ protected String target; /** The values for the PI as a String */ protected String text; /** The values for the PI in name/value pairs */ protected Map<String, String> values; /** * A default constructor for implementors to use. */ public FlyweightProcessingInstruction() { } /** * <p> * This will create a new PI with the given target and values * </p> * * @param target * is the name of the PI * @param values * is the <code>Map</code> of the values for the PI */ public FlyweightProcessingInstruction(String target, Map<String, String> values) { this.target = target; this.values = values; this.text = toString(values); } /** * <p> * This will create a new PI with the given target and values * </p> * * @param target * is the name of the PI * @param text * is the values for the PI as text */ public FlyweightProcessingInstruction(String target, String text) { this.target = target; this.text = text; this.values = parseValues(text); } public String getTarget() { return target; } public void setTarget(String target) { throw new UnsupportedOperationException("This PI is read-only and " + "cannot be modified"); } public String getText() { return text; } public String getValue(String name) { String answer = (String) values.get(name); if (answer == null) { return ""; } return answer; } public Map<String, String> getValues() { return Collections.unmodifiableMap(values); } protected Node createXPathResult(Element parent) { return new DefaultProcessingInstruction(parent, getTarget(), getText()); } } /* * Redistribution and use of this software and associated documentation * ("Software"), with or without modification, are permitted provided that the * following conditions are met: * * 1. Redistributions of source code must retain copyright statements and * notices. Redistributions must also contain a copy of this document. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The name "DOM4J" must not be used to endorse or promote products derived * from this Software without prior written permission of MetaStuff, Ltd. For * written permission, please contact dom4j-info@metastuff.com. * * 4. Products derived from this Software may not be called "DOM4J" nor may * "DOM4J" appear in their names without prior written permission of MetaStuff, * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd. * * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org * * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved. */