| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 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 end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``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 THE APACHE SOFTWARE FOUNDATION 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2002, International |
| * Business Machines Corporation., http://www.ibm.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xpath.impl.parser; |
| |
| import org.apache.xpath.impl.FunctionCallImpl; |
| import org.apache.xpath.impl.KindTestImpl; |
| import org.apache.xpath.impl.LiteralImpl; |
| import org.apache.xpath.impl.NameTestImpl; |
| import org.apache.xpath.impl.OperatorImpl; |
| import org.apache.xpath.impl.PathExprImpl; |
| import org.apache.xpath.impl.SequenceTypeImpl; |
| import org.apache.xpath.impl.StepExprImpl; |
| import org.apache.xpath.impl.VariableImpl; |
| |
| /** |
| * Implementation of {@link NodeFactory}. Returns null for each |
| * factory method. |
| * <p>Provides also a way to create a node factory. By now, it tries |
| * to instantiate an user class, by looking at the system property |
| * with the key {@link #FACTORY_PROPERTY}. If its value is a valid |
| * class name which implements {@link NodeFactory}, then a new |
| * instance of this class is returned. Otherwise, a singletion of this object |
| * is returned. |
| |
| * @author <a href="mailto:villard@us.ibm.com">Lionel Villard</a> |
| * @version $Id$ |
| */ |
| public class DefaultNodeFactory implements NodeFactory |
| { |
| |
| final static private NodeFactory DEFAULT_NODE_FACTORY = new DefaultNodeFactory(); |
| |
| static protected NodeFactory createNodeFactory() |
| { |
| String cn = System.getProperty(FACTORY_PROPERTY_KEY); |
| NodeFactory result; |
| if (cn != null) |
| { |
| try |
| { |
| Class c = Class.forName(cn); |
| |
| result = (NodeFactory) c.newInstance(); |
| } catch (ClassNotFoundException e) |
| { |
| result = DEFAULT_NODE_FACTORY; |
| } catch (InstantiationException e) |
| { |
| result = DEFAULT_NODE_FACTORY; |
| } catch (IllegalAccessException e) |
| { |
| result = DEFAULT_NODE_FACTORY; |
| } catch (ClassCastException e) |
| { |
| result = DEFAULT_NODE_FACTORY; |
| } |
| } |
| else |
| { |
| result = DEFAULT_NODE_FACTORY; |
| } |
| |
| return result; |
| } |
| |
| // Implements NodeFactory |
| |
| public FunctionCallImpl createFunctionCallNode(int id) { |
| return null; |
| } |
| |
| public KindTestImpl createKindTestNode(int id) { |
| return null; |
| } |
| |
| public LiteralImpl createLiteralNode(int id) { |
| return null; |
| } |
| |
| public NameTestImpl createNameTestNode(int id) { |
| return null; |
| } |
| |
| public Node createNode(int id) { |
| return null; |
| } |
| |
| public OperatorImpl createOperatorNode(int id) { |
| return null; |
| } |
| |
| public PathExprImpl createPathNode(int id) { |
| return null; |
| } |
| |
| public StepExprImpl createStepNode(int id) { |
| return null; |
| } |
| |
| public VariableImpl createVarNameNode(int id) { |
| return null; |
| } |
| |
| public SequenceTypeImpl createSequenceTypeNode(int id) { |
| return null; |
| |
| } |
| |
| public SequenceTypeImpl createCastAsNode(int id) { |
| return null; |
| } |
| |
| public SequenceTypeImpl createTreatAsNode(int id) { |
| return null; |
| } |
| |
| } |