/*
* ModeShape (http://www.modeshape.org)
*
* 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 org.modeshape.sequencer.audio;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.jcr.NamespaceRegistry;
import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.RepositoryException;
import org.modeshape.common.util.CheckArg;
import org.modeshape.common.util.StringUtil;
import org.modeshape.jcr.api.Binary;
import org.modeshape.jcr.api.JcrConstants;
import org.modeshape.jcr.api.nodetype.NodeTypeManager;
import org.modeshape.jcr.api.sequencer.Sequencer;
/**
* A sequencer that processes the binary content of an audio file, extracts the metadata for the file, and then writes that
* audio metadata to the repository.
* <p>
* This sequencer produces data that corresponds to the following structure:
* <ul>
* <li><strong>audio:metadata</strong> node of type <code>audio:metadata</code>
* <ul>
* <li><strong>jcr:mimeType</strong> - optional string property for the mime type of the file</li>
* <li><strong>audio:format</strong> - mandatory string property for specifying the format name</li>
* <li><strong>audio:bitrate</strong> - optional long property for specifying the bitrate</li>
* <li><strong>audio:sampleRate</strong> - optional long property for specifying the sample rate</li>
* <li><strong>audio:channels</strong> - optional string property for specifying the channel mode</li>
* <li><strong>audio:length</strong> - optional long property specifying estimation of length</li>
* <li><strong>audio:tag</strong> - optional child node which contains additional id3 (or other) tag information (if available)</li>
* <ul>
* <li><strong>audio:title</strong> - optional string property for the name of the audio file or recording</li>
* <li><strong>audio:artist</strong> - optional string property for the artist of the recording</li>
* <li><strong>audio:album</strong> - optional string property for the name of the album</li>
* <li><strong>audio:year</strong> - optional string property for the year the recording as created</li>
* <li><strong>audio:comment</strong> - optional string property specifying a comment</li>
* <li><strong>audio:track</strong> - optional string property for the number of the track</li>
* <li><strong>audio:genre</strong> - optional string property specifying the genre</li>
* <li><strong>audio:artwork</strong> - optional child node specifying the artwork (cover) saved in metadata</li>
* <ul>
* <li><strong>jcr:mimeType</strong> - optional string property for the mime type of the file</li>
* <li><strong>jcr:data</strong> - optional binary property for the content of the artwork</li>
* <li><strong>audio:artworkType</strong> - optional string property for the type of the artwork</li>
* </ul>
* </ul>
* </li>
* </ul>
* </p>
*
* @since 5.1
*/
public class AudioMetadataSequencer extends Sequencer {
@Override
public void initialize(NamespaceRegistry registry,
NodeTypeManager nodeTypeManager) throws RepositoryException, IOException {
super.registerNodeTypes("audio.cnd", nodeTypeManager, true);
registerDefaultMimeTypes(AudioMetadata.MIME_TYPE_STRINGS);
}
@Override
public boolean execute(Property inputProperty,
Node outputNode,
Context context) throws Exception {
Binary binaryValue = (Binary) inputProperty.getBinary();
CheckArg.isNotNull(binaryValue, "binary");
final String mimeType = binaryValue.getMimeType();
boolean isValid = false;
AudioMetadata metadata = null;
try (InputStream stream = binaryValue.getStream()) {
metadata = new AudioMetadata(stream, mimeType);
isValid = metadata.check();
} catch (Exception e) {
getLogger().error(e, "Could not sequence audio file with MIMEType {0}", mimeType);
}
if (isValid) {
Node sequencedNode = outputNode;
if (outputNode.isNew()) {
outputNode.setPrimaryType(AudioMetadataLexicon.METADATA_NODE);
} else {
sequencedNode = outputNode.addNode(AudioMetadataLexicon.METADATA_NODE, AudioMetadataLexicon.METADATA_NODE);
}
sequencedNode.setProperty(AudioMetadataLexicon.FORMAT_NAME, metadata.getFormatName());
setPropertyIfMetadataPresent(sequencedNode, JcrConstants.JCR_MIME_TYPE, mimeType);
setPropertyIfMetadataPresent(sequencedNode, AudioMetadataLexicon.BITRATE, metadata.getBitrate());
setPropertyIfMetadataPresent(sequencedNode, AudioMetadataLexicon.SAMPLE_RATE, metadata.getSampleRate());
setPropertyIfMetadataPresent(sequencedNode, AudioMetadataLexicon.CHANNELS, metadata.getChannels());
setPropertyIfMetadataPresent(sequencedNode, AudioMetadataLexicon.DURATION, metadata.getDuration());
addTagNode(sequencedNode, metadata);
return true;
} else {
getLogger().error("Could not sequence audio file with MIMEType {0}", mimeType);
return false;
}
}
private void addTagNode(Node sequencedNode,
AudioMetadata metadata) throws RepositoryException {
Node tagNode = sequencedNode.addNode(AudioMetadataLexicon.TAG_NODE, AudioMetadataLexicon.TAG_NODE);
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.TITLE, metadata.getTitle());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.ARTIST, metadata.getArtist());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.ALBUM, metadata.getAlbum());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.YEAR, metadata.getYear());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.COMMENT, metadata.getComment());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.TRACK, metadata.getTrack());
setPropertyIfMetadataPresent(tagNode, AudioMetadataLexicon.GENRE, metadata.getGenre());
for (AudioMetadataArtwork artwork : metadata.getArtwork()) {
Node artworkNode = tagNode.addNode(AudioMetadataLexicon.ARTWORK_NODE, AudioMetadataLexicon.ARTWORK_NODE);
setPropertyIfMetadataPresent(artworkNode, JcrConstants.JCR_MIME_TYPE, artwork.getMimeType());
setPropertyIfMetadataPresent(artworkNode, AudioMetadataLexicon.ARTWORK_TYPE, artwork.getType());
setPropertyIfMetadataPresent(artworkNode, JcrConstants.JCR_DATA, artwork.getData());
}
}
private void setPropertyIfMetadataPresent(Node node,
String propertyName,
Object value) throws RepositoryException {
if (value == null) {
return;
}
if (value instanceof String && !StringUtil.isBlank((String) value)) {
node.setProperty(propertyName, (String) value);
} else if (value instanceof Double) {
node.setProperty(propertyName, (Double) value);
} else if (value instanceof Number) {
node.setProperty(propertyName, ((Number) value).longValue());
} else if (value instanceof byte[]) {
InputStream is = new ByteArrayInputStream((byte[]) value);
Binary binaryProperty = (Binary) node.getSession().getValueFactory().createBinary(is);
node.setProperty(propertyName, binaryProperty);
} else {
getLogger().warn("The value of the property {0} has unknown type and couldn't be saved.", propertyName);
}
}
}