| /* |
| * 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.beam.sdk.extensions.sql.impl.utils; |
| |
| import java.math.BigDecimal; |
| import java.util.Map; |
| import org.apache.beam.sdk.schemas.Schema.TypeName; |
| import org.apache.beam.sdk.transforms.SerializableFunction; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableMap; |
| |
| /** |
| * Provides converters from {@link BigDecimal} to other numeric types based on the input {@link |
| * TypeName}. |
| */ |
| public class BigDecimalConverter { |
| |
| private static final Map<TypeName, SerializableFunction<BigDecimal, ? extends Number>> |
| CONVERTER_MAP = |
| ImmutableMap.<TypeName, SerializableFunction<BigDecimal, ? extends Number>>builder() |
| .put(TypeName.INT32, BigDecimal::intValue) |
| .put(TypeName.INT16, BigDecimal::shortValue) |
| .put(TypeName.BYTE, BigDecimal::byteValue) |
| .put(TypeName.INT64, BigDecimal::longValue) |
| .put(TypeName.FLOAT, BigDecimal::floatValue) |
| .put(TypeName.DOUBLE, BigDecimal::doubleValue) |
| .put(TypeName.DECIMAL, v -> v) |
| .build(); |
| |
| public static SerializableFunction<BigDecimal, ? extends Number> forSqlType(TypeName typeName) { |
| if (!CONVERTER_MAP.containsKey(typeName)) { |
| throw new UnsupportedOperationException( |
| "Conversion from " + typeName + " to BigDecimal is not supported"); |
| } |
| |
| return CONVERTER_MAP.get(typeName); |
| } |
| } |