| /* |
| * 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.orc.impl; |
| |
| import org.apache.hadoop.hive.common.io.DiskRange; |
| import org.apache.hadoop.hive.common.io.DiskRangeList; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * The sections of stripe that we have read. |
| * This might not match diskRange - 1 disk range can be multiple buffer chunks, |
| * depending on DFS block boundaries. |
| */ |
| public class BufferChunk extends DiskRangeList { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(BufferChunk.class); |
| private ByteBuffer chunk; |
| |
| public BufferChunk(long offset, int length) { |
| super(offset, offset + length); |
| chunk = null; |
| } |
| |
| public BufferChunk(ByteBuffer chunk, long offset) { |
| super(offset, offset + chunk.remaining()); |
| this.chunk = chunk; |
| } |
| |
| public void setChunk(ByteBuffer chunk) { |
| this.chunk = chunk; |
| } |
| |
| @Override |
| public boolean hasData() { |
| return chunk != null; |
| } |
| |
| @Override |
| public final String toString() { |
| if (chunk == null) { |
| return "data range[" + offset + ", " + end +")"; |
| } else { |
| boolean makesSense = chunk.remaining() == (end - offset); |
| return "data range [" + offset + ", " + end + "), size: " + chunk.remaining() |
| + (makesSense ? "" : "(!)") + " type: " + |
| (chunk.isDirect() ? "direct" : "array-backed"); |
| } |
| } |
| |
| @Override |
| public DiskRange sliceAndShift(long offset, long end, long shiftBy) { |
| assert offset <= end && offset >= this.offset && end <= this.end; |
| assert offset + shiftBy >= 0; |
| ByteBuffer sliceBuf = chunk.slice(); |
| int newPos = (int) (offset - this.offset); |
| int newLimit = newPos + (int) (end - offset); |
| try { |
| sliceBuf.position(newPos); |
| sliceBuf.limit(newLimit); |
| } catch (Throwable t) { |
| LOG.error("Failed to slice buffer chunk with range" + " [" + this.offset + ", " + this.end |
| + "), position: " + chunk.position() + " limit: " + chunk.limit() + ", " |
| + (chunk.isDirect() ? "direct" : "array") + "; to [" + offset + ", " + end + ") " |
| + t.getClass()); |
| throw new RuntimeException(t); |
| } |
| return new BufferChunk(sliceBuf, offset + shiftBy); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == null || other.getClass() != getClass()) { |
| return false; |
| } |
| BufferChunk ob = (BufferChunk) other; |
| return chunk.equals(ob.chunk); |
| } |
| |
| @Override |
| public int hashCode() { |
| return chunk.hashCode(); |
| } |
| |
| @Override |
| public ByteBuffer getData() { |
| return chunk; |
| } |
| } |