AOO410/main/xmerge/source/xmerge/java/org/openoffice/xmerge/converter/xml/EmbeddedBinaryObject.java

/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



package org.openoffice.xmerge.converter.xml;

import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;


/**
 * This class represents embedded object's in an OpenOffice.org document that
 * have a binary representation.
 */
public class EmbeddedBinaryObject extends EmbeddedObject {
    
    /** The object's binary representation. */
    protected byte[] objData = null;
    
    /**
     * Constructor for an embedded object stored using an XML representation.
     *
     * @param   name    The name of the object.
     * @param   type    The mime-type of the object.  See the class summary.
     */    
    public EmbeddedBinaryObject(String name, String type) {
        super(name, type);
    }
    
    
    /**
     * Package private constructor for use when reading an object from a 
     * compressed SX? file.
     *
     * @param   name    The name of the object.
     * @param   type    The mime-type of the object.  See the class summary.
     * @param   source  The OfficeZip representation of the SX? file that stores
     *                  the object.
     */    
    EmbeddedBinaryObject(String name, String type, OfficeZip source) {
        super(name, type, source);
    }

    
    /**
     * This method returns the data for this object.
     *
     * @return  A <code>byte</code> array containing the object's data.
     */
    public byte[] getBinaryData() {
        
        if (objData == null) {
            // See if we came from a Zip file
            if (zipFile != null) {
                objData = zipFile.getNamedBytes(objName);
            }
        }
        
        return objData;
    }
    
    
    /**
     * Sets the data for this object.
     *
     * @param   data    A <code>byte</code> array containing data for the object.
     */
    public void setBinaryData(byte[] data) {
        objData = data;
        hasChanged = true;
    }
    
    /** 
     * Package private method for writing the data of the EmbeddedObject to a
     * SX? file.
     *
     * @param   zip     An <code>OfficeZip</code> instance representing the file
     *                  the data is to be written to.
     */
    void write(OfficeZip zip) {
        if (hasChanged) {
            zip.setNamedBytes(objName, objData);
        }
    }
    
    
    /** 
     * Package private method that constructs the manifest.xml entries for this
     * embedded object.
     */
    void writeManifestData(Document manifestDoc) throws DOMException {        
        Element objNode = manifestDoc.createElement(OfficeConstants.TAG_MANIFEST_FILE);
        
        objNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_TYPE, objType);
        objNode.setAttribute(OfficeConstants.ATTRIBUTE_MANIFEST_FILE_PATH,  objName);
        
        manifestDoc.getDocumentElement().appendChild(objNode);
    }
    
}