/*
* Entagged Audio Tag library
* Copyright (c) 2004-2005 Christian Laireiter <liree@web.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jaudiotagger.audio.asf.util;
import org.jaudiotagger.audio.asf.data.*;
import org.jaudiotagger.tag.FieldKey;
import org.jaudiotagger.tag.Tag;
import org.jaudiotagger.tag.asf.*;
import org.jaudiotagger.tag.reference.GenreTypes;
import java.util.Iterator;
import java.util.List;
/**
* This class provides functionality to convert
* {@link org.jaudiotagger.audio.asf.data.AsfHeader}objects into
* {@link org.jaudiotagger.tag.Tag}objects.<br>
*
* @author Christian Laireiter (liree)
*/
public final class TagConverter {
/**
* This method assigns those tags of <code>tag</code> which are defined to
* be common by jaudiotagger. <br>
*
* @param tag
* The tag from which the values are gathered. <br>
* Assigned values are: <br>
* @param description
* The extended content description which should receive the
* values. <br>
* <b>Warning: </b> the common values will be replaced.
*/
public static void assignCommonTagValues(Tag tag,
MetadataContainer description) {
assert description.getContainerType() == ContainerType.EXTENDED_CONTENT;
MetadataDescriptor tmp;
if (!Utils.isBlank(tag.getFirst(FieldKey.ALBUM))) {
tmp = new MetadataDescriptor(description.getContainerType(),
AsfFieldKey.ALBUM.getFieldName(),
MetadataDescriptor.TYPE_STRING);
tmp.setStringValue(tag.getFirst(FieldKey.ALBUM));
description.removeDescriptorsByName(tmp.getName());
description.addDescriptor(tmp);
} else {
description.removeDescriptorsByName(AsfFieldKey.ALBUM
.getFieldName());
}
if (!Utils.isBlank(tag.getFirst(FieldKey.TRACK))) {
tmp = new MetadataDescriptor(description.getContainerType(),
AsfFieldKey.TRACK.getFieldName(),
MetadataDescriptor.TYPE_STRING);
tmp.setStringValue(tag.getFirst(FieldKey.TRACK));
description.removeDescriptorsByName(tmp.getName());
description.addDescriptor(tmp);
} else {
description.removeDescriptorsByName(AsfFieldKey.TRACK
.getFieldName());
}
if (!Utils.isBlank(tag.getFirst(FieldKey.YEAR))) {
tmp = new MetadataDescriptor(description.getContainerType(),
AsfFieldKey.YEAR.getFieldName(),
MetadataDescriptor.TYPE_STRING);
tmp.setStringValue(tag.getFirst(FieldKey.YEAR));
description.removeDescriptorsByName(tmp.getName());
description.addDescriptor(tmp);
} else {
description
.removeDescriptorsByName(AsfFieldKey.YEAR.getFieldName());
}
if (!Utils.isBlank(tag.getFirst(FieldKey.GENRE))) {
// Write Genre String value
tmp = new MetadataDescriptor(description.getContainerType(),
AsfFieldKey.GENRE.getFieldName(),
MetadataDescriptor.TYPE_STRING);
tmp.setStringValue(tag.getFirst(FieldKey.GENRE));
description.removeDescriptorsByName(tmp.getName());
description.addDescriptor(tmp);
Integer genreNum = GenreTypes.getInstanceOf().getIdForName(
tag.getFirst(FieldKey.GENRE));
// ..and if it is one of the standard genre types used the id as
// well
if (genreNum != null) {
tmp = new MetadataDescriptor(description.getContainerType(),
AsfFieldKey.GENRE_ID.getFieldName(),
MetadataDescriptor.TYPE_STRING);
tmp.setStringValue("(" + genreNum + ")");
description.removeDescriptorsByName(tmp.getName());
description.addDescriptor(tmp);
} else {
description.removeDescriptorsByName(AsfFieldKey.GENRE_ID
.getFieldName());
}
} else {
description.removeDescriptorsByName(AsfFieldKey.GENRE
.getFieldName());
description.removeDescriptorsByName(AsfFieldKey.GENRE_ID
.getFieldName());
}
}
/**
* This method creates a {@link Tag}and fills it with the contents of the
* given {@link AsfHeader}.<br>
*
* @param source
* The ASF header which contains the information. <br>
* @return A Tag with all its values.
*/
public static AsfTag createTagOf(AsfHeader source) {
// TODO do we need to copy here.
AsfTag result = new AsfTag(true);
for (int i = 0; i < ContainerType.values().length; i++) {
MetadataContainer current = source
.findMetadataContainer(ContainerType.values()[i]);
if (current != null) {
List<MetadataDescriptor> descriptors = current.getDescriptors();
for (MetadataDescriptor descriptor : descriptors) {
AsfTagField toAdd;
if (descriptor.getType() == MetadataDescriptor.TYPE_BINARY) {
if (descriptor.getName().equals(
AsfFieldKey.COVER_ART.getFieldName())) {
toAdd = new AsfTagCoverField(descriptor);
} else if (descriptor.getName().equals(
AsfFieldKey.BANNER_IMAGE.getFieldName())) {
toAdd = new AsfTagBannerField(descriptor);
} else {
toAdd = new AsfTagField(descriptor);
}
} else {
toAdd = new AsfTagTextField(descriptor);
}
result.addField(toAdd);
}
}
}
return result;
}
/**
* This method distributes the tags fields among the
* {@linkplain ContainerType#getOrdered()} {@linkplain MetadataContainer
* containers}.
*
* @param tag
* the tag with the fields to distribute.
* @return distribution
*/
public static MetadataContainer[] distributeMetadata(final AsfTag tag) {
final Iterator<AsfTagField> asfFields = tag.getAsfFields();
final MetadataContainer[] createContainers = MetadataContainerFactory
.getInstance().createContainers(ContainerType.getOrdered());
boolean assigned;
AsfTagField current;
while (asfFields.hasNext()) {
current = asfFields.next();
assigned = false;
for (int i = 0; !assigned && i < createContainers.length; i++) {
if (ContainerType.areInCorrectOrder(createContainers[i]
.getContainerType(), AsfFieldKey.getAsfFieldKey(
current.getId()).getHighestContainer())) {
if (createContainers[i].isAddSupported(current
.getDescriptor())) {
createContainers[i].addDescriptor(current
.getDescriptor());
assigned = true;
}
}
}
assert assigned;
}
return createContainers;
}
/**
* Hidden utility class constructor.
*/
private TagConverter() {
// Nothing to do.
}
} |
