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/** * Copyright 2014 Groupon.com * * 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.arpnetworking.jackson; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.JsonSerializer; import com.fasterxml.jackson.databind.SerializerProvider; import com.google.common.base.Optional; import java.io.IOException; /** * Serializer for <code>Optional</code>. The serialized format of an optional * is simply the serialized format of the object contained in the optional or * null if no instance is present. * * @author Ville Koskela (vkoskela at groupon dot com) */ @SuppressWarnings("rawtypes") public final class OptionalSerializer extends JsonSerializer<Optional> { /** * Create a new instance of <code>JsonSerializer<Optional></code>. * * @return New instance of <code>JsonSerializer<Optional></code>. */ public static JsonSerializer<Optional> newInstance() { return new OptionalSerializer(); } /** * {@inheritDoc} */ @Override public void serialize(final Optional optional, final JsonGenerator generator, final SerializerProvider provider) throws IOException { if (optional.isPresent()) { provider.defaultSerializeValue(optional.get(), generator); } else { provider.defaultSerializeNull(generator); } } private OptionalSerializer() { } }