EmbeddedXMLObject.java

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/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
 
package org.openoffice.xmerge.converter.xml;
 
import java.io.IOException;
 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
 
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
 
import org.xml.sax.SAXException;
 
public class EmbeddedXMLObject extends EmbeddedObject {
 
    // Entries for the subdocuments that constitute this object;
    private Document contentDOM  = null;
    private Document settingsDOM = null;
    private Document stylesDOM   = null;
 
    private DocumentBuilder builder = null;
 
    public EmbeddedXMLObject(String name, String type) {
        super(name, type);
    }
 
    EmbeddedXMLObject(String name, String type, OfficeZip source) {
        super(name, type, source);
    }
 
    public Document getContentDOM() throws SAXException, IOException {
 
        if (contentDOM == null) {
            contentDOM = getNamedDOM("content.xml");
        }
 
        return contentDOM;
    }
 
    public void setContentDOM(Document content) {
        contentDOM = content;
        hasChanged = true;
    }
 
    public Document getSettingsDOM() throws SAXException, IOException {
 
        if (settingsDOM == null) {
            settingsDOM = getNamedDOM("settings.xml");
        }
 
        return settingsDOM;
    }
 
    public void setSettingsDOM(Document settings) {
        settingsDOM = settings;
        hasChanged = true;
    }
 
    public Document getStylesDOM() throws SAXException, IOException {
 
        if (stylesDOM == null) {
            stylesDOM = getNamedDOM("styles.xml");
        }
 
        return stylesDOM;
    }
 
    public void setStylesDOM(Document styles) {
        stylesDOM = styles;
        hasChanged = true;
    }
 
    private Document getNamedDOM(String name) throws SAXException, IOException {
        if (zipFile == null) {
            return null;
        }
 
        try {
            if (builder == null) {
                DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 
                factory.setValidating(false);
                builder = factory.newDocumentBuilder();
            }
 
            byte[] data = zipFile.getNamedBytes((objName + "/" + name));
            if (data != null) {
                return OfficeDocument.parse(builder, data);
            } else {
                return null;
            }
 
        } catch (ParserConfigurationException pce) {
            throw new SAXException(pce);
        }
    }
 
    @Override
    void write(OfficeZip zip) throws IOException {
        if (hasChanged) {
            if (contentDOM != null) {
                zip.setNamedBytes((objName + "/content.xml"),
                                        OfficeDocument.docToBytes(contentDOM));
            }
            if (settingsDOM != null) {
                zip.setNamedBytes((objName + "/settings.xml"),
                                        OfficeDocument.docToBytes(settingsDOM));
            }
            if (stylesDOM != null) {
                zip.setNamedBytes((objName + "/styles.xml"),
                                        OfficeDocument.docToBytes(stylesDOM));
            }
        }
    }
 
    @Override
    void writeManifestData(Document manifestDoc) throws DOMException {
        Node root = manifestDoc.getDocumentElement();
 
        if (contentDOM != null) {
            Element contentNode = manifestDoc.createElement(OfficeConstants.TAG_MANIFEST_FILE);
 
            contentNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_TYPE, "text/xml");
            contentNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_PATH, (objName + "/content.xml"));
 
            root.appendChild(contentNode);
        }
 
        if (settingsDOM != null) {
            Element settingsNode = manifestDoc.createElement(OfficeConstants.TAG_MANIFEST_FILE);
 
            settingsNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_TYPE, "text/xml");
            settingsNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_PATH, (objName + "/settings.xml"));
 
            root.appendChild(settingsNode);
        }
 
        if (stylesDOM != null) {
            Element stylesNode = manifestDoc.createElement(OfficeConstants.TAG_MANIFEST_FILE);
 
            stylesNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_TYPE, "text/xml");
            stylesNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_PATH, (objName + "/styles.xml"));
        }
 
        Element objectNode = manifestDoc.createElement(OfficeConstants.TAG_MANIFEST_FILE);
 
        objectNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_TYPE, objType);
        objectNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_PATH, (objName + "/"));
 
        root.appendChild(objectNode);
    }
}