package org.apache.lucene.analysis.payloads;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 under the License.
*/
import org.apache.lucene.index.Payload;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
/**
* Does nothing other than convert the char array to a byte array using the specified encoding.
*
**/
public class IdentityEncoder extends AbstractEncoder implements PayloadEncoder{
protected Charset charset = Charset.forName("UTF-8");
/** @deprecated This field is no longer used. Use {@link #charset} instead. */
@Deprecated
protected String charsetName = charset.name();
public IdentityEncoder() {
}
public IdentityEncoder(Charset charset) {
this.charset = charset;
// @deprecated, remove this in 4.0:
charsetName = charset.name();
}
public Payload encode(char[] buffer, int offset, int length) {
final ByteBuffer bb = charset.encode(CharBuffer.wrap(buffer, offset, length));
if (bb.hasArray()) {
return new Payload(bb.array(), bb.arrayOffset() + bb.position(), bb.remaining());
} else {
// normally it should always have an array, but who knows?
final byte[] b = new byte[bb.remaining()];
bb.get(b);
return new Payload(b);
}
}
}