exmcimovie.java

来自「EXCEL read and write」· Java 代码 · 共 101 行

/*
* 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.apache.poi.hslf.record;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.POILogger;

/**
 * A container record that specifies information about a movie stored externally.
 *
 * @author Yegor Kozlov
 */
public class ExMCIMovie extends RecordContainer {
    private byte[] _header;

    //An ExVideoContainer record that specifies information about the MCI movie
    private ExVideoContainer exVideo;

    /**
     * Set things up, and find our more interesting children
     */
    protected ExMCIMovie(byte[] source, int start, int len) {
        // Grab the header
        _header = new byte[8];
        System.arraycopy(source, start, _header, 0, 8);

        // Find our children
        _children = Record.findChildRecords(source, start + 8, len - 8);
        findInterestingChildren();
    }

    /**
     * Create a new ExMCIMovie, with blank fields
     */
    public ExMCIMovie() {
        _header = new byte[8];
        // Setup our header block
        _header[0] = 0x0f; // We are a container record
        LittleEndian.putShort(_header, 2, (short) getRecordType());

        exVideo = new ExVideoContainer();
        _children = new Record[]{exVideo};

    }

    /**
     * Go through our child records, picking out the ones that are
     * interesting, and saving those for use by the easy helper
     * methods.
     */
    private void findInterestingChildren() {

        // First child should be the ExVideoContainer
        if (_children[0] instanceof ExVideoContainer) {
            exVideo = (ExVideoContainer) _children[0];
        } else {
            logger.log(POILogger.ERROR, "First child record wasn't a ExVideoContainer, was of type " + _children[0].getRecordType());
        }
    }

    /**
     * We are of type 4103
     */
    public long getRecordType() {
        return RecordTypes.ExMCIMovie.typeID;
    }

    /**
     * Write the contents of the record back, so it can be written
     * to disk
     */
    public void writeOut(OutputStream out) throws IOException {
        writeOut(_header[0], _header[1], getRecordType(), _children, out);
    }

    /**
     * Returns the ExVideoContainer that specifies information about the MCI movie
     */
    public ExVideoContainer getExVideo() {
        return exVideo; }


}