| /* |
| * 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.gearpump.streaming.refactor.coder; |
| |
| import java.io.*; |
| |
| public class DoubleCoder extends AtomicCoder<Double> { |
| |
| public static DoubleCoder of() { |
| return INSTANCE; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| private static final DoubleCoder INSTANCE = new DoubleCoder(); |
| |
| private DoubleCoder() { |
| } |
| |
| @Override |
| public void encode(Double value, OutputStream outStream) |
| throws CoderException { |
| if (value == null) { |
| throw new CoderException("cannot encode a null Double"); |
| } |
| try { |
| new DataOutputStream(outStream).writeDouble(value); |
| } catch (IOException e) { |
| throw new CoderException(e); |
| } |
| } |
| |
| @Override |
| public Double decode(InputStream inStream) |
| throws CoderException { |
| try { |
| return new DataInputStream(inStream).readDouble(); |
| } catch (EOFException | UTFDataFormatException exn) { |
| // These exceptions correspond to decoding problems, so change |
| // what kind of exception they're branded as. |
| throw new CoderException(exn); |
| } catch (IOException e) { |
| throw new CoderException(e); |
| } |
| } |
| |
| @Override |
| public void verifyDeterministic() { |
| throw new NonDeterministicException(this, |
| "Floating point encodings are not guaranteed to be deterministic."); |
| } |
| |
| @Override |
| public boolean consistentWithEquals() { |
| return true; |
| } |
| |
| @Override |
| public boolean isRegisterByteSizeObserverCheap(Double value) { |
| return true; |
| } |
| |
| @Override |
| protected long getEncodedElementByteSize(Double value) { |
| if (value == null) { |
| throw new CoderException("cannot encode a null Double"); |
| } |
| return 8; |
| } |
| } |