documentimpl.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 146 行

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001, 2002 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 "Xerces" 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 [e-mail].
 *
 * 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) 1999, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.impl.xs.dom;

import com.sun.org.apache.xerces.internal.dom.TextImpl;
import com.sun.org.apache.xerces.internal.dom.AttrNSImpl;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
import org.w3c.dom.Attr;


/**
 * Our own document implementation, which knows how to create an element
 * with line/column information
 * 
 * @author Sandy Gao, IBM
 * 
 * @version $Id: DocumentImpl.java,v 1.3 2002/11/20 00:49:47 twl Exp $
 */
public class DocumentImpl extends com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl {

    protected DOMNodePool fNodePool;
    //
    // Constructors
    //
    
    /**
     * Create a document
     */
    public DocumentImpl() {
        super();
    }


    /**
     * create an element with line/colument information
     */
    public Element createElementNS(String namespaceURI, String qualifiedName,
                                   String localpart,
                                   int lineNum, int columnNum)
        throws DOMException
    {
        if (fNodePool !=null) {
            ElementNSImpl element = fNodePool.getElementNode();
            element.setValues(this, namespaceURI, qualifiedName,
                                 localpart, lineNum, columnNum);
            return element;
        } 
        return new ElementNSImpl(this, namespaceURI, qualifiedName,
                                 localpart, lineNum, columnNum);
    }

    /**
     * Create a text node. If node pool is available use text node from the pool.
     * 
     * @param data
     * @return a usable TextNode
     */
    public Text createTextNode(String data) {
        if (fNodePool != null) {
            TextImpl text = fNodePool.getTextNode();
            text.setValues(this, data);
            return text;
        }
        return new TextImpl(this, data);
    }  
      

    /**
     * Create attribute node. If node pool is available use 
     * attribute node from the pool.
     * 
     * @param namespaceURI
     * @param qualifiedName
     * @param localName
     * @return a new attribute node
     * @exception DOMException
     */
    public Attr createAttributeNS(String namespaceURI, String qualifiedName,
                                  String localName)  throws DOMException {
        if (fNodePool != null) {
            AttrNSImpl attr = fNodePool.getAttrNode();
            attr.setValues(this, namespaceURI, qualifiedName, localName);
            return attr;
        }
        return new AttrNSImpl(this, namespaceURI, qualifiedName, localName);
    } 
    
} // class DocumentImpl