| /* |
| * 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.hadoop.hbase.util; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| import org.apache.hbase.thirdparty.com.google.common.collect.Lists; |
| |
| /** |
| * Utility methods for working with {@link ByteRange}. |
| */ |
| @InterfaceAudience.Public |
| public class ByteRangeUtils { |
| public static int numEqualPrefixBytes(ByteRange left, ByteRange right, int rightInnerOffset) { |
| int maxCompares = Math.min(left.getLength(), right.getLength() - rightInnerOffset); |
| final byte[] lbytes = left.getBytes(); |
| final byte[] rbytes = right.getBytes(); |
| final int loffset = left.getOffset(); |
| final int roffset = right.getOffset(); |
| for (int i = 0; i < maxCompares; ++i) { |
| if (lbytes[loffset + i] != rbytes[roffset + rightInnerOffset + i]) { |
| return i; |
| } |
| } |
| return maxCompares; |
| } |
| |
| public static ArrayList<byte[]> copyToNewArrays(Collection<ByteRange> ranges) { |
| if (ranges == null) { |
| return new ArrayList<>(0); |
| } |
| ArrayList<byte[]> arrays = Lists.newArrayListWithCapacity(ranges.size()); |
| for (ByteRange range : ranges) { |
| arrays.add(range.deepCopyToNewArray()); |
| } |
| return arrays; |
| } |
| |
| public static ArrayList<ByteRange> fromArrays(Collection<byte[]> arrays) { |
| if (arrays == null) { |
| return new ArrayList<>(0); |
| } |
| ArrayList<ByteRange> ranges = Lists.newArrayListWithCapacity(arrays.size()); |
| for (byte[] array : arrays) { |
| ranges.add(new SimpleMutableByteRange(array)); |
| } |
| return ranges; |
| } |
| |
| public static void write(OutputStream os, ByteRange byteRange) throws IOException { |
| os.write(byteRange.getBytes(), byteRange.getOffset(), byteRange.getLength()); |
| } |
| |
| public static void write(OutputStream os, ByteRange byteRange, int byteRangeInnerOffset) |
| throws IOException { |
| os.write(byteRange.getBytes(), byteRange.getOffset() + byteRangeInnerOffset, |
| byteRange.getLength() - byteRangeInnerOffset); |
| } |
| } |