| /* |
| * 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.icu.tokenattributes; |
| |
| import com.ibm.icu.text.Collator; |
| import com.ibm.icu.text.RawCollationKey; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttributeImpl; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** |
| * Extension of {@link CharTermAttributeImpl} that encodes the term text as a binary Unicode |
| * collation key instead of as UTF-8 bytes. |
| */ |
| public class ICUCollatedTermAttributeImpl extends CharTermAttributeImpl { |
| private final Collator collator; |
| private final RawCollationKey key = new RawCollationKey(); |
| |
| /** |
| * Create a new ICUCollatedTermAttributeImpl |
| * |
| * @param collator Collation key generator |
| */ |
| public ICUCollatedTermAttributeImpl(Collator collator) { |
| // clone the collator: see http://userguide.icu-project.org/collation/architecture |
| try { |
| this.collator = (Collator) collator.clone(); |
| } catch (CloneNotSupportedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public BytesRef getBytesRef() { |
| collator.getRawCollationKey(toString(), key); |
| final BytesRef ref = this.builder.get(); |
| ref.bytes = key.bytes; |
| ref.offset = 0; |
| ref.length = key.size; |
| return ref; |
| } |
| } |