1 package org.apache.lucene.store;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import org.apache.lucene.util.BytesRef;
22 /** @lucene.experimental */
23 public final class ByteArrayDataInput extends DataInput {
30 public ByteArrayDataInput(byte[] bytes) {
34 public ByteArrayDataInput(byte[] bytes, int offset, int len) {
35 reset(bytes, offset, len);
38 public ByteArrayDataInput() {
39 reset(BytesRef.EMPTY_BYTES);
42 public void reset(byte[] bytes) {
43 reset(bytes, 0, bytes.length);
46 public int getPosition() {
50 public void reset(byte[] bytes, int offset, int len) {
56 public boolean eof() {
60 public void skipBytes(int count) {
66 public short readShort() {
67 return (short) (((bytes[pos++] & 0xFF) << 8) | (bytes[pos++] & 0xFF));
71 public int readInt() {
72 assert pos+4 <= limit;
73 return ((bytes[pos++] & 0xFF) << 24) | ((bytes[pos++] & 0xFF) << 16)
74 | ((bytes[pos++] & 0xFF) << 8) | (bytes[pos++] & 0xFF);
78 public long readLong() {
79 assert pos+8 <= limit;
80 final int i1 = ((bytes[pos++] & 0xff) << 24) | ((bytes[pos++] & 0xff) << 16) |
81 ((bytes[pos++] & 0xff) << 8) | (bytes[pos++] & 0xff);
82 final int i2 = ((bytes[pos++] & 0xff) << 24) | ((bytes[pos++] & 0xff) << 16) |
83 ((bytes[pos++] & 0xff) << 8) | (bytes[pos++] & 0xff);
84 return (((long)i1) << 32) | (i2 & 0xFFFFFFFFL);
88 public int readVInt() {
90 byte b = bytes[pos++];
92 for (int shift = 7; (b & 0x80) != 0; shift += 7) {
95 i |= (b & 0x7F) << shift;
101 public long readVLong() {
103 byte b = bytes[pos++];
105 for (int shift = 7; (b & 0x80) != 0; shift += 7) {
108 i |= (b & 0x7FL) << shift;
113 // NOTE: AIOOBE not EOF if you read too much
115 public byte readByte() {
120 // NOTE: AIOOBE not EOF if you read too much
122 public void readBytes(byte[] b, int offset, int len) {
123 assert pos + len <= limit;
124 System.arraycopy(bytes, pos, b, offset, len);
128 private boolean checkBounds() {