| /* |
| * 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. |
| */ |
| package org.apache.lucene.analysis.payloads; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** 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 = StandardCharsets.UTF_8; |
| |
| public IdentityEncoder() {} |
| |
| public IdentityEncoder(Charset charset) { |
| this.charset = charset; |
| } |
| |
| @Override |
| public BytesRef encode(char[] buffer, int offset, int length) { |
| final ByteBuffer bb = charset.encode(CharBuffer.wrap(buffer, offset, length)); |
| if (bb.hasArray()) { |
| return new BytesRef(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 BytesRef(b); |
| } |
| } |
| } |