| /* |
| * 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.phoenix.util; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.DataOutput; |
| import java.io.DataOutputStream; |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| |
| import com.google.common.collect.Lists; |
| |
| public class PrefixByteCodec { |
| |
| public static List<byte[]> decodeBytes(ImmutableBytesWritable encodedBytes, int maxLength) throws IOException { |
| ByteArrayInputStream stream = new ByteArrayInputStream(encodedBytes.get(), encodedBytes.getOffset(), encodedBytes.getLength()); |
| DataInput input = new DataInputStream(stream); |
| PrefixByteDecoder decoder = new PrefixByteDecoder(maxLength); |
| List<byte[]> listOfBytes = Lists.newArrayList(); |
| try { |
| while (true) { |
| ImmutableBytesWritable ptr = decoder.decode(input); |
| // For this test, copy the bytes, but we wouldn't do this unless |
| // necessary for non testing |
| listOfBytes.add(ptr.copyBytes()); |
| } |
| } catch (EOFException e) { // Ignore as this signifies we're done |
| |
| } |
| return listOfBytes; |
| } |
| |
| public static int encodeBytes(List<byte[]> listOfBytes, ImmutableBytesWritable ptr) throws IOException { |
| try (TrustedByteArrayOutputStream stream = new TrustedByteArrayOutputStream(calculateSize(listOfBytes))) { |
| DataOutput output = new DataOutputStream(stream); |
| PrefixByteEncoder encoder = new PrefixByteEncoder(); |
| for (byte[] bytes : listOfBytes) { |
| encoder.encode(output, bytes, 0, bytes.length); |
| } |
| ptr.set(stream.getBuffer(), 0, stream.size()); |
| return encoder.getMaxLength(); |
| } |
| } |
| |
| public static int calculateSize(List<byte[]> listOfBytes) { |
| int size = 0; |
| for (byte[] bytes : listOfBytes) { |
| size += bytes.length; |
| } |
| return size; |
| } |
| |
| public static ImmutableBytesWritable decode(PrefixByteDecoder decoder, DataInput input) throws EOFException { |
| try { |
| ImmutableBytesWritable val= decoder.decode(input); |
| return val; |
| } catch(EOFException eof){ |
| throw eof; |
| }catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |