2 * ================================================================================
3 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 * ============LICENSE_END=========================================================
20 package org.onap.dcae.analytics.model.util.function;
22 import com.fasterxml.jackson.core.type.TypeReference;
23 import com.fasterxml.jackson.databind.ObjectMapper;
25 import java.io.IOException;
26 import java.util.Optional;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * Converts given Json String to Java Object if possible
34 * @param <T> Target Java Object class Type for JSON String
36 * @author Rajiv Singla
38 public class JsonToJavaObjectBiFunction<T> implements BiFunctionExtension<TypeReference<T>, String, Optional<T>> {
40 private static final Logger logger = LoggerFactory.getLogger(JsonToJavaObjectBiFunction.class);
42 private final ObjectMapper objectMapper;
44 public JsonToJavaObjectBiFunction(final ObjectMapper objectMapper) {
45 this.objectMapper = objectMapper;
50 public Optional<T> apply(final TypeReference<T> typeReference, final String jsonString) {
53 return Optional.of(objectMapper.readValue(jsonString, typeReference));
54 } catch (IOException e) {
55 logger.error("Unable to convert given JSON String to Java Object. JSON String: " + jsonString, e);
58 return Optional.empty();