/* * Copyright 2016 Sai Pullabhotla. * * Licensed 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 com.jmethods.catatumbo.mappers; import com.google.cloud.datastore.LongValue; import com.google.cloud.datastore.NullValue; import com.google.cloud.datastore.Value; import com.google.cloud.datastore.ValueBuilder; import com.jmethods.catatumbo.Mapper; import com.jmethods.catatumbo.MappingException; /** * An implementation of {@link Mapper} for mapping primitive and wrapper integer types to/from Cloud * Datastore. * * @author Sai Pullabhotla * */ public class IntegerMapper implements Mapper { @Override public ValueBuilder<?, ?, ?> toDatastore(Object input) { if (input == null) { return NullValue.newBuilder(); } return LongValue.newBuilder((int) input); } @Override public Object toModel(Value<?> input) { if (input instanceof NullValue) { return null; } Long l = ((LongValue) input).get(); if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) { throw new MappingException(String.format("Value %d is out of range for integer type", l)); } return l.intValue(); } }