textimpl.java

Java的面向对象数据库系统的源代码

/**
 * org/ozone-db/xml/dom/TextImpl.java
 *
 * The contents of this file are subject to the OpenXML Public
 * License Version 1.0; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 * http://www.openxml.org/license.html
 *
 * THIS SOFTWARE IS DISTRIBUTED ON AN "AS IS" BASIS WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED. THE INITIAL DEVELOPER
 * AND ALL CONTRIBUTORS SHALL NOT BE LIABLE FOR ANY DAMAGES AS A
 * RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. SEE THE LICENSE FOR THE SPECIFIC LANGUAGE GOVERNING
 * RIGHTS AND LIMITATIONS UNDER THE LICENSE.
 *
 * The Initial Developer of this code under the License is Assaf Arkin.
 * Portions created by Assaf Arkin are Copyright (C) 1998, 1999.
 * All Rights Reserved.
 *
 * The Initial Developer of this code under the License is Assaf Arkin.
 * Portions created by Assaf Arkin are Copyright (C) 1998, 1999.
 * All Rights Reserved.
 */

/**
 * Changes for Persistent DOM running with ozone are
 * Copyright 1999 by SMB GmbH. All rights reserved.
 */

package org.ozoneDB.xml.dom;

import org.w3c.dom.*;


/**
 * Implements the textual content (termed  character data) of a {@link
 * org.w3c.dom.Element} or {@link org.w3c.dom.Attr}. If there is no markup
 * inside an element's content, the text is contained in a single object
 * implementing the {@link org.w3c.dom.Text} interface; if there is markup,
 * it is parsed into a list of elements and {@link org.w3c.dom.Text} nodes
 * that form the list of children of the element.
 * <P>
 * Notes:
 * <OLl>
 * <LI>Node type is {@link org.w3c.dom.Node#TEXT_NODE}
 * <LI>Node does not support childern
 * <LI>Node name is always "#text"
 * <LI>One of two nodes that may be added to an attribute
 * </OL>
 *
 *
 * @version $Revision: 1.2 $ $Date: 2003/11/20 23:18:42 $
 * @author <a href="mailto:[e-mail]">Assaf Arkin</a>
 * @see org.w3c.dom.Text
 * @see CharacterDataImpl
 */
public class TextImpl extends CharacterDataImpl implements TextProxy {

    final static long serialVersionUID = 1;


    public short getNodeType() {
        return TEXT_NODE;
    }


    public synchronized final Text splitText( int offset ) throws DOMException {
        TextProxy next = null;

        if (isReadOnly()) {
            throw new DOMExceptionImpl( DOMException.NO_MODIFICATION_ALLOWED_ERR );
        }
        if (offset < 0 || offset > getLength()) {
            throw new DOMExceptionImpl( DOMException.INDEX_SIZE_ERR, "Offest is negative or greater than text size." );
        }
        // Create new Text node, splice the first section and place it in the new
        // text node, then add it before this node. Splice the second section and
        // place it in the existing node. Note that this Text node might not have
        // a parent.
        try {
            next = (TextProxy)database().createObject( TextImpl.class.getName() );
            next.init( _ownerDocument, substringData( 0, offset ) );
        } catch (Exception except) {
            throw new DOMExceptionImpl( DOMExceptionImpl.PDOM_ERR, except.getMessage() );
        }
        if (getParentNode() != null) {
            getParentNode().insertBefore( next, this );
        }
        setData( substringData( offset, getLength() - offset ) );
        return next;
    }


    public String toString() {
        String value;

        value = getData();
        if (value.length() > 64) {
            value = value.substring( 0, 64 ) + "..";
        }
        value = value.replace( '\n', '|' );
        return "Text node: [" + value + "]";
    }


    public Object clone() {
        TextProxy clone = null;
        try {
            clone = (TextProxy)database().createObject( TextImpl.class.getName() );
            clone.init( _ownerDocument, getNodeValue() );
            cloneInto( clone, true );
        } catch (Exception except) {
            throw new DOMExceptionImpl( DOMExceptionImpl.PDOM_ERR, except.getMessage() );
        }
        return clone;
    }


    public Node cloneNode( boolean deep ) {
        TextProxy clone = null;
        try {
            clone = (TextProxy)database().createObject( TextImpl.class.getName() );
            clone.init( _ownerDocument, getNodeValue() );
            cloneInto( clone, deep );
        } catch (Exception except) {
            throw new DOMExceptionImpl( DOMExceptionImpl.PDOM_ERR, except.getMessage() );
        }
        return clone;
    }


    /**
     * Constructor requires only owner document and initial text.
     *
     * @param owner The owner of this document
     * @param text The initial text
     */
    TextImpl( DocumentImpl owner, String text ) {
        super( owner, "#text", text );
    }


    /**
     * Constructor for {@link CDATASectionImpl}.
     */
    TextImpl( DocumentImpl owner, String name, String text ) {
        super( owner, name, text );
    }


    public TextImpl() {
        super();
    }


    public void init( DocumentProxy owner, String text ) {
        super.init( owner, "#text", text );
    }
}