2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2018 Ericsson. All rights reserved.
4 * Copyright (C) 2019 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.distribution.reception.parameters;
24 import com.google.gson.JsonDeserializationContext;
25 import com.google.gson.JsonDeserializer;
26 import com.google.gson.JsonElement;
27 import com.google.gson.JsonObject;
28 import com.google.gson.JsonPrimitive;
30 import java.lang.reflect.Type;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
36 * This class deserialises policy decoder parameters from JSON.
38 * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
40 public class PolicyDecoderConfigurationParametersJsonAdapter
41 implements JsonDeserializer<PolicyDecoderConfigurationParameterGroup> {
42 private static final Logger LOGGER = LoggerFactory.getLogger(PolicyDecoderConfigurationParametersJsonAdapter.class);
44 private static final String PARAMETER_CLASS_NAME = "parameterClassName";
45 private static final String POLICY_DECODER_PARAMETERS = "parameters";
48 public PolicyDecoderConfigurationParameterGroup deserialize(final JsonElement json, final Type typeOfT,
49 final JsonDeserializationContext context) {
50 final JsonObject jsonObject = json.getAsJsonObject();
52 final String policyDecoderParameterClassName = getParameterGroupClassName(jsonObject);
53 final Class<?> policyDecoderParameterClass = getParameterGroupClass(policyDecoderParameterClassName);
55 return context.deserialize(jsonObject.get(POLICY_DECODER_PARAMETERS), policyDecoderParameterClass);
58 private String getParameterGroupClassName(final JsonObject jsonObject) {
59 final JsonPrimitive classNameJsonPrimitive = ((JsonPrimitive) jsonObject.get(PARAMETER_CLASS_NAME));
61 if (classNameJsonPrimitive == null || classNameJsonPrimitive.getAsString().length() == 0) {
62 final String errorMessage = "parameter \"" + PARAMETER_CLASS_NAME + "\" value \""
63 + (classNameJsonPrimitive != null ? classNameJsonPrimitive.getAsString() : "null")
64 + "\" invalid in JSON file";
65 LOGGER.warn(errorMessage);
66 throw new IllegalArgumentException(errorMessage);
68 return classNameJsonPrimitive.getAsString().replaceAll("\\s+", "");
71 private Class<?> getParameterGroupClass(final String policyDecoderParameterClassName) {
72 Class<?> policyDecoderParameterClass = null;
74 policyDecoderParameterClass = Class.forName(policyDecoderParameterClassName);
75 } catch (final ClassNotFoundException exp) {
76 final String errorMessage = "parameter \"" + PARAMETER_CLASS_NAME + "\" value \""
77 + policyDecoderParameterClassName + "\", could not find class";
78 LOGGER.warn(errorMessage, exp);
79 throw new IllegalArgumentException(errorMessage, exp);
81 return policyDecoderParameterClass;