OmaDrmContainerBox.java

/*  
 * Copyright 2008 CoreMedia AG, Hamburg
 *
 * Licensed 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 com.coremedia.iso.boxes.odf;

import com.coremedia.iso.IsoOutputStream;
import com.coremedia.iso.boxes.Box;
import com.coremedia.iso.boxes.FullContainerBox;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * The OMA DRM Container box is the container for a single content object in a OMA DCF file.
 * See OMA DCF Specification for details.
 */
public class OmaDrmContainerBox extends FullContainerBox {
    public static final String TYPE = "odrm";

    protected long getHeaderSize() {
        return 20;
    }

    public byte[] getHeader() {
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            IsoOutputStream ios = new IsoOutputStream(baos);
            ios.writeUInt32(1);
            ios.write(getType());
            ios.writeUInt64(getSize());
            ios.writeUInt8(getVersion());
            ios.writeUInt24(getFlags());

            assert baos.size() == getHeaderSize();
            return baos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    public OmaDrmContainerBox() {
        super(TYPE);
    }

    /**
     * Gets the <code>OmaDrmDiscreteHeadersBox</code> child box. If none can be
     * found <code>null</code> is returned.
     *
     * @return the <code>OmaDrmDiscreteHeadersBox</code> if any or <code>null</code>
     */
    public OmaDrmDiscreteHeadersBox getOmaDrmDiscreteHeadersBox() {
        for (Box box : boxes) {
            if (box instanceof OmaDrmDiscreteHeadersBox) {
                return (OmaDrmDiscreteHeadersBox) box;
            }
        }
        return null;
    }


    public OmaDrmContentObjectBox getOmaDrmContentObjectBox() {
        for (Box box : boxes) {
            if (box instanceof OmaDrmContentObjectBox) {
                return (OmaDrmContentObjectBox) box;
            }
        }
        return null;
    }
}