2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. 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.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.model.utilities.json;
23 import com.google.gson.Gson;
24 import com.google.gson.GsonBuilder;
25 import java.io.InputStream;
26 import java.io.InputStreamReader;
27 import java.io.Reader;
30 * This class reads objects of the given class from an input stream.
32 * @author Liam Fallon (liam.fallon@ericsson.com)
33 * @param <P> the generic type
35 public class JsonHandler<P> {
38 * This method reads objects of a given class from an input stream.
40 * @param inputClass The class to read
41 * @param inputStream the input stream to read from
42 * @return the object read
44 public P read(final Class<P> inputClass, final InputStream inputStream) {
45 // Register the adapters for our carrier technologies and event protocols with GSON
46 final GsonBuilder gsonBuilder = new GsonBuilder();
48 final Gson gson = gsonBuilder.serializeNulls().create();
49 final Reader jsonResourceReader = new InputStreamReader(inputStream);
50 return gson.fromJson(jsonResourceReader, inputClass);