1 package org.apache.lucene.util.encoding;
3 import java.io.IOException;
4 import java.io.InputStream;
7 * Licensed to the Apache Software Foundation (ASF) under one or more
8 * contributor license agreements. See the NOTICE file distributed with
9 * this work for additional information regarding copyright ownership.
10 * The ASF licenses this file to You under the Apache License, Version 2.0
11 * (the "License"); you may not use this file except in compliance with
12 * the License. You may obtain a copy of the License at
14 * http://www.apache.org/licenses/LICENSE-2.0
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
24 * An {@link IntDecoder} which wraps another {@link IntDecoder} and reverts the
25 * d-gap that was encoded by {@link DGapIntEncoder}. The wrapped decoder
26 * performs the actual decoding, while this class simply adds the decoded value
27 * to the previous value.
29 * @lucene.experimental
31 public class DGapIntDecoder extends IntDecoder {
33 private final IntDecoder decoder;
37 public DGapIntDecoder(IntDecoder decoder) {
38 this.decoder = decoder;
42 public long decode() throws IOException {
43 long decode = decoder.decode();
48 return prev += decode;
52 public void reInit(InputStream in) {
58 public String toString() {
59 return "DGap (" + decoder.toString() + ")";