| package org.apache.lucene.store; |
| |
| /* |
| * 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. |
| */ |
| |
| import org.apache.lucene.util.BytesRef; |
| |
| /** |
| * DataOutput backed by a byte array. |
| * <b>WARNING:</b> This class omits most low-level checks, |
| * so be sure to test heavily with assertions enabled. |
| * @lucene.experimental |
| */ |
| public class ByteArrayDataOutput extends DataOutput { |
| private byte[] bytes; |
| |
| private int pos; |
| private int limit; |
| |
| public ByteArrayDataOutput(byte[] bytes) { |
| reset(bytes); |
| } |
| |
| public ByteArrayDataOutput(byte[] bytes, int offset, int len) { |
| reset(bytes, offset, len); |
| } |
| |
| public ByteArrayDataOutput() { |
| reset(BytesRef.EMPTY_BYTES); |
| } |
| |
| public void reset(byte[] bytes) { |
| reset(bytes, 0, bytes.length); |
| } |
| |
| public void reset(byte[] bytes, int offset, int len) { |
| this.bytes = bytes; |
| pos = offset; |
| limit = offset + len; |
| } |
| |
| public int getPosition() { |
| return pos; |
| } |
| |
| @Override |
| public void writeByte(byte b) { |
| assert pos < limit; |
| bytes[pos++] = b; |
| } |
| |
| @Override |
| public void writeBytes(byte[] b, int offset, int length) { |
| assert pos + length <= limit; |
| System.arraycopy(b, offset, bytes, pos, length); |
| pos += length; |
| } |
| } |