| /* |
| * 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.solr.common.util; |
| |
| public class BytesBlock { |
| private int bufSize; |
| public byte[] buf; |
| //current position |
| private int pos; |
| //going to expand. mark the start position |
| private int startPos = 0; |
| |
| public BytesBlock(int sz) { |
| this.bufSize = sz; |
| create(); |
| } |
| |
| public int getPos() { |
| return pos; |
| } |
| |
| public int getStartPos() { |
| return startPos; |
| } |
| |
| public byte[] getBuf() { |
| return buf; |
| } |
| |
| public BytesBlock expand(int sz) { |
| if (bufSize - pos >= sz) { |
| return markPositions(sz); |
| } |
| if (sz > (bufSize / 4)) return new BytesBlock(sz).expand(sz);// a reasonably large block, create new |
| create(); |
| return markPositions(sz); |
| } |
| |
| private BytesBlock markPositions(int sz) { |
| this.startPos = pos; |
| pos += sz; |
| return this; |
| } |
| |
| |
| private void create() { |
| buf = new byte[bufSize]; |
| startPos = pos = 0; |
| } |
| } |