| /* |
| * 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 |
| * |
| * https://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.avro.file.codec; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.avro.file.Codec; |
| |
| /** |
| * Simple Custom Codec to validate making Codec Public Compress and Decompress |
| * operations are just bitwise-NOT of data |
| */ |
| public class CustomCodec extends Codec { |
| |
| private static final String CODECNAME = "CUSTOMCODEC"; |
| |
| @Override |
| public String getName() { |
| return CODECNAME; |
| } |
| |
| @Override |
| public ByteBuffer compress(ByteBuffer in) throws IOException { |
| ByteBuffer out = ByteBuffer.allocate(in.remaining()); |
| while (in.position() < in.capacity()) |
| out.put((byte) ~in.get()); |
| return out; |
| } |
| |
| @Override |
| public ByteBuffer decompress(ByteBuffer in) throws IOException { |
| ByteBuffer out = ByteBuffer.allocate(in.remaining()); |
| while (in.position() < in.capacity()) |
| out.put((byte) ~in.get()); |
| return out; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (this == other) |
| return true; |
| if (other instanceof Codec) { |
| ByteBuffer original = ByteBuffer.allocate(getName().getBytes(UTF_8).length); |
| original.put(getName().getBytes(UTF_8)); |
| original.rewind(); |
| try { |
| return compareDecompress((Codec) other, original); |
| } catch (IOException e) { |
| return false; |
| } |
| } else |
| return false; |
| } |
| |
| /** |
| * Codecs must implement an equals() method. Two codecs, A and B are equal if: |
| * the result of A and B decompressing content compressed by A is the same AND |
| * the result of A and B decompressing content compressed by B is the same |
| */ |
| private boolean compareDecompress(Codec other, ByteBuffer original) throws IOException { |
| ByteBuffer compressedA = this.compress(original); |
| original.rewind(); |
| ByteBuffer compressedB = other.compress(original); |
| |
| return this.decompress(compressedA).equals(other.decompress((ByteBuffer) compressedA.rewind())) |
| && this.decompress(compressedB).equals(other.decompress((ByteBuffer) compressedB.rewind())); |
| } |
| |
| @Override |
| public int hashCode() { |
| return getName().hashCode(); |
| } |
| } |