| /* |
| * 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.flink.api.common.typeutils.base; |
| |
| import java.io.IOException; |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.common.typeutils.SimpleTypeSerializerSnapshot; |
| import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| |
| /** |
| * Serializer for serializing/deserializing BigDecimal values including null values. |
| */ |
| @Internal |
| public final class BigDecSerializer extends TypeSerializerSingleton<BigDecimal> { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public static final BigDecSerializer INSTANCE = new BigDecSerializer(); |
| |
| @Override |
| public boolean isImmutableType() { |
| return true; |
| } |
| |
| @Override |
| public BigDecimal createInstance() { |
| return BigDecimal.ZERO; |
| } |
| |
| @Override |
| public BigDecimal copy(BigDecimal from) { |
| return from; |
| } |
| |
| @Override |
| public BigDecimal copy(BigDecimal from, BigDecimal reuse) { |
| return from; |
| } |
| |
| @Override |
| public int getLength() { |
| return -1; |
| } |
| |
| @Override |
| public void serialize(BigDecimal record, DataOutputView target) throws IOException { |
| // null value support |
| if (record == null) { |
| BigIntSerializer.writeBigInteger(null, target); |
| return; |
| } |
| // fast paths for 0, 1, 10 |
| // only reference equality is checked because equals would be too expensive |
| else if (record == BigDecimal.ZERO) { |
| BigIntSerializer.writeBigInteger(BigInteger.ZERO, target); |
| target.writeInt(0); |
| return; |
| } |
| else if (record == BigDecimal.ONE) { |
| BigIntSerializer.writeBigInteger(BigInteger.ONE, target); |
| target.writeInt(0); |
| return; |
| } |
| else if (record == BigDecimal.TEN) { |
| BigIntSerializer.writeBigInteger(BigInteger.TEN, target); |
| target.writeInt(0); |
| return; |
| } |
| // default |
| BigIntSerializer.writeBigInteger(record.unscaledValue(), target); |
| target.writeInt(record.scale()); |
| } |
| |
| @Override |
| public BigDecimal deserialize(DataInputView source) throws IOException { |
| return readBigDecimal(source); |
| } |
| |
| @Override |
| public BigDecimal deserialize(BigDecimal reuse, DataInputView source) throws IOException { |
| return readBigDecimal(source); |
| } |
| |
| @Override |
| public void copy(DataInputView source, DataOutputView target) throws IOException { |
| final boolean isNull = BigIntSerializer.copyBigInteger(source, target); |
| if (!isNull) { |
| final int scale = source.readInt(); |
| target.writeInt(scale); |
| } |
| } |
| |
| @Override |
| public boolean canEqual(Object obj) { |
| return obj instanceof BigDecSerializer; |
| } |
| |
| // -------------------------------------------------------------------------------------------- |
| // Static Helpers for BigInteger Serialization |
| // -------------------------------------------------------------------------------------------- |
| |
| public static BigDecimal readBigDecimal(DataInputView source) throws IOException { |
| final BigInteger unscaledValue = BigIntSerializer.readBigInteger(source); |
| if (unscaledValue == null) { |
| return null; |
| } |
| final int scale = source.readInt(); |
| // fast-path for 0, 1, 10 |
| if (scale == 0) { |
| if (unscaledValue == BigInteger.ZERO) { |
| return BigDecimal.ZERO; |
| } |
| else if (unscaledValue == BigInteger.ONE) { |
| return BigDecimal.ONE; |
| } |
| else if (unscaledValue == BigInteger.TEN) { |
| return BigDecimal.TEN; |
| } |
| } |
| // default |
| return new BigDecimal(unscaledValue, scale); |
| } |
| |
| @Override |
| public TypeSerializerSnapshot<BigDecimal> snapshotConfiguration() { |
| return new BigDecSerializerSnapshot(); |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Serializer configuration snapshot for compatibility and format evolution. |
| */ |
| @SuppressWarnings("WeakerAccess") |
| public static final class BigDecSerializerSnapshot extends SimpleTypeSerializerSnapshot<BigDecimal> { |
| |
| public BigDecSerializerSnapshot() { |
| super(() -> INSTANCE); |
| } |
| } |
| } |