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* Licensed to the Apache Software Foundation (ASF) under one *
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* 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 *
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package org.apache.james.mime4j.field;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.List;
import org.apache.james.mime4j.codec.DecodeMonitor;
import org.apache.james.mime4j.dom.FieldParser;
import org.apache.james.mime4j.dom.field.ContentLanguageField;
import org.apache.james.mime4j.stream.Field;
import org.apache.james.mime4j.stream.ParserCursor;
import org.apache.james.mime4j.stream.RawField;
import org.apache.james.mime4j.stream.RawFieldParser;
import org.apache.james.mime4j.util.ByteSequence;
import org.apache.james.mime4j.util.ContentUtil;
/**
* Represents a <code>Content-Transfer-Encoding</code> field.
*/
public class ContentLanguageFieldLenientImpl extends AbstractField implements ContentLanguageField {
private final static int COMMA = ',';
private final static BitSet DELIM = RawFieldParser.INIT_BITSET(COMMA);
private boolean parsed = false;
private List<String> languages;
ContentLanguageFieldLenientImpl(final Field rawField, final DecodeMonitor monitor) {
super(rawField, monitor);
}
private void parse() {
parsed = true;
languages = new ArrayList<String>();
RawField f = getRawField();
ByteSequence buf = f.getRaw();
int pos = f.getDelimiterIdx() + 1;
if (buf == null) {
String body = f.getBody();
if (body == null) {
return;
}
buf = ContentUtil.encode(body);
pos = 0;
}
RawFieldParser parser = RawFieldParser.DEFAULT;
ParserCursor cursor = new ParserCursor(pos, buf.length());
for (;;) {
String token = parser.parseToken(buf, cursor, DELIM);
if (token.length() > 0) {
languages.add(token);
}
if (cursor.atEnd()) {
break;
} else {
pos = cursor.getPos();
if (buf.byteAt(pos) == COMMA) {
cursor.updatePos(pos + 1);
}
}
}
}
public List<String> getLanguages() {
if (!parsed) {
parse();
}
return new ArrayList<String>(languages);
}
public static final FieldParser<ContentLanguageField> PARSER = new FieldParser<ContentLanguageField>() {
public ContentLanguageField parse(final Field rawField, final DecodeMonitor monitor) {
return new ContentLanguageFieldLenientImpl(rawField, monitor);
}
};
}