org.apache.lucene.analysis.payloads.IdentityEncoder Maven / Gradle / Ivy
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.charset.Charset;
import java.util.Arrays;
import java.io.UnsupportedEncodingException;
/**
* 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");
protected String charsetName = "UTF-8"; //argh, stupid 1.4
public IdentityEncoder() {
}
public IdentityEncoder(Charset charset) {
this.charset = charset;
charsetName = charset.name();
}
public Payload encode(char[] buffer, int offset, int length) {
//what's the most efficient way to get a byte [] from a char[] array
//Do we have to go through String?
String tmp = new String(buffer, offset, length);
Payload result = null;//Can we avoid allocating by knowing where using the new API?
try {
result = new Payload(tmp.getBytes(charsetName));
} catch (UnsupportedEncodingException e) {
//should never hit this, since we get the name from the Charset
}
return result;
}
}