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/*
 * 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;

import java.nio.charset.StandardCharsets;

import org.apache.lucene.analysis.tokenattributes.CharTermAttributeImpl;
import org.apache.lucene.util.AttributeFactory;
import org.apache.lucene.util.BytesRef;

/**
 * Extension of {@link CharTermAttributeImpl} that encodes the term
 * text as UTF-16 bytes instead of as UTF-8 bytes.
 */
public class MockUTF16TermAttributeImpl extends CharTermAttributeImpl {
  
  /** Factory that returns an instance of this class for CharTermAttribute */
  public static final AttributeFactory UTF16_TERM_ATTRIBUTE_FACTORY =
      AttributeFactory.getStaticImplementation(AttributeFactory.DEFAULT_ATTRIBUTE_FACTORY, MockUTF16TermAttributeImpl.class);
  
  @Override
  public BytesRef getBytesRef() {
    final BytesRef ref = this.builder.get();
    ref.bytes = toString().getBytes(StandardCharsets.UTF_16LE);
    ref.offset = 0;
    ref.length = ref.bytes.length;
    return ref;
  }
}