pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / contrib / facet / src / java / org / apache / lucene / util / encoding / VInt8IntEncoder.java

diff --git a/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/encoding/VInt8IntEncoder.java b/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/encoding/VInt8IntEncoder.java
deleted file mode 100644 (file)
index 228951d..0000000
--- a/lucene-java-3.4.0/lucene/contrib/facet/src/java/org/apache/lucene/util/encoding/VInt8IntEncoder.java
+++ /dev/null
@@ -1,86 +0,0 @@
-package org.apache.lucene.util.encoding;
-
-import java.io.IOException;
-
-/**
- * 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.
- */
-
-/**
- * An {@link IntEncoder} which implements variable length encoding. A number is
- * encoded as follows:
- * <ul>
- * <li>If it is less than 127 and non-negative, i.e. uses only 7 bits, it is
- * encoded as a single byte: 0bbbbbbb.
- * <li>If it occupies more than 7 bits, it is represented as a series of bytes,
- * each byte carrying 7 bits. All but the last byte have the MSB set, the last
- * one has it unset.
- * </ul>
- * Example:
- * <ol>
- * <li>n = 117 = 01110101: This has less than 8 significant bits, therefore is
- * encoded as 01110101 = 0x75.
- * <li>n = 100000 = (binary) 11000011010100000. This has 17 significant bits,
- * thus needs three Vint8 bytes. Pad it to a multiple of 7 bits, then split it
- * into chunks of 7 and add an MSB, 0 for the last byte, 1 for the others:
- * 1|0000110 1|0001101 0|0100000 = 0x86 0x8D 0x20.
- * </ol>
- * <b>NOTE:</b> although this encoder is not limited to values &ge; 0, it is not
- * recommended for use with negative values, as their encoding will result in 5
- * bytes written to the output stream, rather than 4. For such values, either
- * use {@link SimpleIntEncoder} or write your own version of variable length
- * encoding, which can better handle negative values.
- * 
- * @lucene.experimental
- */
-public class VInt8IntEncoder extends IntEncoder {
-
-  @Override
-  public void encode(int value) throws IOException {
-    if ((value & ~0x7F) == 0) {
-      out.write(value);
-    } else if ((value & ~0x3FFF) == 0) {
-      out.write(0x80 | (value >> 7));
-      out.write(0x7F & value);
-    } else if ((value & ~0x1FFFFF) == 0) {
-      out.write(0x80 | (value >> 14));
-      out.write(0x80 | (value >> 7));
-      out.write(0x7F & value);
-    } else if ((value & ~0xFFFFFFF) == 0) {
-      out.write(0x80 | (value >> 21));
-      out.write(0x80 | (value >> 14));
-      out.write(0x80 | (value >> 7));
-      out.write(0x7F & value);
-    } else {
-      out.write(0x80 | (value >> 28));
-      out.write(0x80 | (value >> 21));
-      out.write(0x80 | (value >> 14));
-      out.write(0x80 | (value >> 7));
-      out.write(0x7F & value);
-    }
-  }
-
-  @Override
-  public IntDecoder createMatchingDecoder() {
-    return new VInt8IntDecoder();
-  }
-
-  @Override
-  public String toString() {
-    return "VInt8";
-  }
-
-}