| /* |
| * 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.search.suggest; |
| |
| import java.util.Comparator; |
| |
| import org.apache.lucene.search.suggest.fst.BytesRefSorter; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.BytesRefArray; |
| import org.apache.lucene.util.BytesRefIterator; |
| import org.apache.lucene.util.Counter; |
| |
| /** |
| * An {@link BytesRefSorter} that keeps all the entries in memory. |
| * @lucene.experimental |
| * @lucene.internal |
| */ |
| public final class InMemorySorter implements BytesRefSorter { |
| private final BytesRefArray buffer = new BytesRefArray(Counter.newCounter()); |
| private boolean closed = false; |
| private final Comparator<BytesRef> comparator; |
| |
| /** |
| * Creates an InMemorySorter, sorting entries by the |
| * provided comparator. |
| */ |
| public InMemorySorter(Comparator<BytesRef> comparator) { |
| this.comparator = comparator; |
| } |
| |
| @Override |
| public void add(BytesRef utf8) { |
| if (closed) throw new IllegalStateException(); |
| buffer.append(utf8); |
| } |
| |
| @Override |
| public BytesRefIterator iterator() { |
| closed = true; |
| return buffer.iterator(comparator); |
| } |
| |
| @Override |
| public Comparator<BytesRef> getComparator() { |
| return comparator; |
| } |
| } |