/*
* 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.data;
import org.jaudiotagger.audio.asf.util.Utils;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* This class represents the data of a chunk which contains title, author,
* copyright, description and the rating of the file. <br>
* It is optional within ASF files. But if, exists only once.
*
* @author Christian Laireiter
*/
public final class ContentDescription extends MetadataContainer {
/**
* Stores the only allowed keys of this metadata container.
*/
public final static Set<String> ALLOWED;
/**
* Field key for author.
*/
public final static String KEY_AUTHOR = "AUTHOR";
/**
* Field key for copyright.
*/
public final static String KEY_COPYRIGHT = "COPYRIGHT";
/**
* Field key for description.
*/
public final static String KEY_DESCRIPTION = "DESCRIPTION";
/**
* Field key for rating.
*/
public final static String KEY_RATING = "RATING";
/**
* Field key for title.
*/
public final static String KEY_TITLE = "TITLE";
static {
ALLOWED = new HashSet<String>(Arrays.asList(KEY_AUTHOR,
KEY_COPYRIGHT, KEY_DESCRIPTION, KEY_RATING, KEY_TITLE));
}
/**
* Creates an instance. <br>
*/
public ContentDescription() {
this(0, BigInteger.ZERO);
}
/**
* Creates an instance.
*
* @param pos
* Position of content description within file or stream
* @param chunkLen
* Length of content description.
*/
public ContentDescription(final long pos,final BigInteger chunkLen) {
super(ContainerType.CONTENT_DESCRIPTION, pos, chunkLen);
}
/**
* @return Returns the author.
*/
public String getAuthor() {
return getValueFor(KEY_AUTHOR);
}
/**
* @return Returns the comment.
*/
public String getComment() {
return getValueFor(KEY_DESCRIPTION);
}
/**
* @return Returns the copyRight.
*/
public String getCopyRight() {
return getValueFor(KEY_COPYRIGHT);
}
/**
* {@inheritDoc}
*/
@Override
public long getCurrentAsfChunkSize() {
long result = 44; // GUID + UINT64 for size + 5 times string length
// (each
// 2 bytes) + 5 times zero term char (2 bytes each).
result += getAuthor().length() * 2; // UTF-16LE
result += getComment().length() * 2;
result += getRating().length() * 2;
result += getTitle().length() * 2;
result += getCopyRight().length() * 2;
return result;
}
/**
* @return returns the rating.
*/
public String getRating() {
return getValueFor(KEY_RATING);
}
/**
* @return Returns the title.
*/
public String getTitle() {
return getValueFor(KEY_TITLE);
}
/**
* {@inheritDoc}
*/
@Override
public boolean isAddSupported(final MetadataDescriptor descriptor) {
return ALLOWED.contains(descriptor.getName())
&& super.isAddSupported(descriptor);
}
/**
*
* {@inheritDoc}
*/
@Override
public String prettyPrint(final String prefix) {
final StringBuilder result = new StringBuilder(super.prettyPrint(prefix));
result.append(prefix).append(" |->Title : ").append(getTitle())
.append(Utils.LINE_SEPARATOR);
result.append(prefix).append(" |->Author : ").append(getAuthor())
.append(Utils.LINE_SEPARATOR);
result.append(prefix).append(" |->Copyright : ").append(
getCopyRight()).append(Utils.LINE_SEPARATOR);
result.append(prefix).append(" |->Description: ").append(getComment())
.append(Utils.LINE_SEPARATOR);
result.append(prefix).append(" |->Rating :").append(getRating())
.append(Utils.LINE_SEPARATOR);
return result.toString();
}
/**
* @param fileAuthor
* The author to set.
* @throws IllegalArgumentException
* If "UTF-16LE"-byte-representation would take more than 65535
* bytes.
*/
public void setAuthor(final String fileAuthor) throws IllegalArgumentException {
setStringValue(KEY_AUTHOR, fileAuthor);
}
/**
* @param tagComment
* The comment to set.
* @throws IllegalArgumentException
* If "UTF-16LE"-byte-representation would take more than 65535
* bytes.
*/
public void setComment(final String tagComment) throws IllegalArgumentException {
setStringValue(KEY_DESCRIPTION, tagComment);
}
/**
* @param cpright
* The copyRight to set.
* @throws IllegalArgumentException
* If "UTF-16LE"-byte-representation would take more than 65535
* bytes.
*/
public void setCopyright(final String cpright) throws IllegalArgumentException {
setStringValue(KEY_COPYRIGHT, cpright);
}
/**
* @param ratingText
* The rating to be set.
* @throws IllegalArgumentException
* If "UTF-16LE"-byte-representation would take more than 65535
* bytes.
*/
public void setRating(final String ratingText) throws IllegalArgumentException {
setStringValue(KEY_RATING, ratingText);
}
/**
* @param songTitle
* The title to set.
* @throws IllegalArgumentException
* If "UTF-16LE"-byte-representation would take more than 65535
* bytes.
*/
public void setTitle(final String songTitle) throws IllegalArgumentException {
setStringValue(KEY_TITLE, songTitle);
}
/**
* {@inheritDoc}
*/
@Override
public long writeInto(final OutputStream out) throws IOException {
final long chunkSize = getCurrentAsfChunkSize();
out.write(this.getGuid().getBytes());
Utils.writeUINT64(getCurrentAsfChunkSize(), out);
// write the sizes of the string representations plus 2 bytes zero term
// character
Utils.writeUINT16(getTitle().length() * 2 + 2, out);
Utils.writeUINT16(getAuthor().length() * 2 + 2, out);
Utils.writeUINT16(getCopyRight().length() * 2 + 2, out);
Utils.writeUINT16(getComment().length() * 2 + 2, out);
Utils.writeUINT16(getRating().length() * 2 + 2, out);
// write the Strings
out.write(Utils.getBytes(getTitle(), AsfHeader.ASF_CHARSET));
out.write(AsfHeader.ZERO_TERM);
out.write(Utils.getBytes(getAuthor(), AsfHeader.ASF_CHARSET));
out.write(AsfHeader.ZERO_TERM);
out.write(Utils.getBytes(getCopyRight(), AsfHeader.ASF_CHARSET));
out.write(AsfHeader.ZERO_TERM);
out.write(Utils.getBytes(getComment(), AsfHeader.ASF_CHARSET));
out.write(AsfHeader.ZERO_TERM);
out.write(Utils.getBytes(getRating(), AsfHeader.ASF_CHARSET));
out.write(AsfHeader.ZERO_TERM);
return chunkSize;
}
} |
