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.service.parameters.eventprotocol;
23 import com.google.gson.JsonDeserializationContext;
24 import com.google.gson.JsonDeserializer;
25 import com.google.gson.JsonElement;
26 import com.google.gson.JsonObject;
27 import com.google.gson.JsonPrimitive;
28 import com.google.gson.JsonSerializationContext;
29 import com.google.gson.JsonSerializer;
31 import java.lang.reflect.Type;
32 import java.util.HashMap;
35 import org.onap.policy.apex.service.engine.event.impl.apexprotocolplugin.ApexEventProtocolParameters;
36 import org.onap.policy.apex.service.engine.event.impl.jsonprotocolplugin.JsonEventProtocolParameters;
37 import org.onap.policy.common.parameters.ParameterRuntimeException;
38 import org.slf4j.ext.XLogger;
39 import org.slf4j.ext.XLoggerFactory;
42 * This class serialises and deserialises various type of event protocol parameters to and from
45 * @author Liam Fallon (liam.fallon@ericsson.com)
47 public class EventProtocolParametersJsonAdapter
48 implements JsonSerializer<EventProtocolParameters>, JsonDeserializer<EventProtocolParameters> {
49 private static final XLogger LOGGER = XLoggerFactory.getXLogger(EventProtocolParametersJsonAdapter.class);
51 // Recurring string constants
52 private static final String EVENT_PROTOCOL_PREFIX = "event protocol \"";
53 private static final String VALUE_TAG = "\" value \"";
55 private static final String PARAMETER_CLASS_NAME = "parameterClassName";
57 private static final String EVENT_PROTOCOL_TOKEN = "eventProtocol";
58 private static final String EVENT_PROTOCOL_PARAMETERS = "parameters";
60 // Built in event protocol parameters
61 private static final Map<String, String> BUILT_IN_EVENT_PROTOCOL_PARMETER_CLASS_MAP = new HashMap<>();
64 BUILT_IN_EVENT_PROTOCOL_PARMETER_CLASS_MAP.put("JSON", JsonEventProtocolParameters.class.getName());
65 BUILT_IN_EVENT_PROTOCOL_PARMETER_CLASS_MAP.put("APEX", ApexEventProtocolParameters.class.getName());
71 * @see com.google.gson.JsonSerializer#serialize(java.lang.Object, java.lang.reflect.Type,
72 * com.google.gson.JsonSerializationContext)
75 public JsonElement serialize(final EventProtocolParameters src, final Type typeOfSrc,
76 final JsonSerializationContext context) {
77 final String returnMessage = "serialization of Apex event protocol parameters to Json is not supported";
78 LOGGER.error(returnMessage);
79 throw new ParameterRuntimeException(returnMessage);
85 * @see com.google.gson.JsonDeserializer#deserialize(com.google.gson.JsonElement,
86 * java.lang.reflect.Type, com.google.gson.JsonDeserializationContext)
89 public EventProtocolParameters deserialize(final JsonElement json, final Type typeOfT,
90 final JsonDeserializationContext context) {
91 final JsonObject jsonObject = json.getAsJsonObject();
93 // Get the event protocol label primitive
94 final JsonPrimitive labelJsonPrimitive = (JsonPrimitive) jsonObject.get(EVENT_PROTOCOL_TOKEN);
96 // Check if we found our event protocol
97 if (labelJsonPrimitive == null) {
98 LOGGER.warn("event protocol parameter \"" + EVENT_PROTOCOL_TOKEN + "\" not found in JSON file");
102 // Get and check the event protocol label
103 final String eventProtocolLabel = labelJsonPrimitive.getAsString().replaceAll("\\s+", "");
104 if (eventProtocolLabel == null || eventProtocolLabel.length() == 0) {
105 final String errorMessage = "event protocol parameter \"" + EVENT_PROTOCOL_TOKEN + VALUE_TAG
106 + labelJsonPrimitive.getAsString() + "\" invalid in JSON file";
107 LOGGER.warn(errorMessage);
108 throw new ParameterRuntimeException(errorMessage);
111 // We now get the event protocol parameter class
112 String eventProtocolParameterClassName = null;
114 // Get the event protocol parameter class for the event protocol plugin class from the
115 // configuration parameters
116 final JsonPrimitive classNameJsonPrimitive = (JsonPrimitive) jsonObject.get(PARAMETER_CLASS_NAME);
118 // If no event protocol parameter class was specified, we use the default
119 if (classNameJsonPrimitive == null) {
120 eventProtocolParameterClassName = BUILT_IN_EVENT_PROTOCOL_PARMETER_CLASS_MAP.get(eventProtocolLabel);
122 // We use the specified one
123 eventProtocolParameterClassName = classNameJsonPrimitive.getAsString().replaceAll("\\s+", "");
126 // Check the event protocol parameter class
127 if (eventProtocolParameterClassName == null || eventProtocolParameterClassName.length() == 0) {
128 final String errorMessage =
129 EVENT_PROTOCOL_PREFIX + eventProtocolLabel + "\" parameter \"" + PARAMETER_CLASS_NAME + VALUE_TAG
130 + (classNameJsonPrimitive != null ? classNameJsonPrimitive.getAsString() : "null")
131 + "\" invalid in JSON file";
132 LOGGER.warn(errorMessage);
133 throw new ParameterRuntimeException(errorMessage);
136 // Get the class for the event protocol
137 Class<?> eventProtocolParameterClass = null;
139 eventProtocolParameterClass = Class.forName(eventProtocolParameterClassName);
140 } catch (final ClassNotFoundException e) {
141 final String errorMessage =
142 EVENT_PROTOCOL_PREFIX + eventProtocolLabel + "\" parameter \"" + PARAMETER_CLASS_NAME + VALUE_TAG
143 + eventProtocolParameterClassName + "\", could not find class";
144 LOGGER.warn(errorMessage, e);
145 throw new ParameterRuntimeException(errorMessage, e);
148 // Deserialise the class
149 EventProtocolParameters eventProtocolParameters =
150 context.deserialize(jsonObject.get(EVENT_PROTOCOL_PARAMETERS), eventProtocolParameterClass);
151 if (eventProtocolParameters == null) {
152 // OK no parameters for the event protocol have been specified, just instantiate the
153 // default parameters
155 eventProtocolParameters = (EventProtocolParameters) eventProtocolParameterClass.newInstance();
156 } catch (final Exception e) {
157 final String errorMessage = "could not create default parameters for event protocol \""
158 + eventProtocolLabel + "\"\n" + e.getMessage();
159 LOGGER.warn(errorMessage, e);
160 throw new ParameterRuntimeException(errorMessage, e);
164 // Check that the event protocol label matches the label in the event protocol parameters
166 if (!eventProtocolParameters.getLabel().equals(eventProtocolLabel)) {
167 final String errorMessage = EVENT_PROTOCOL_PREFIX + eventProtocolLabel + "\" does not match plugin \""
168 + eventProtocolParameters.getLabel() + "\" in \"" + eventProtocolParameterClassName
169 + "\", specify correct event protocol parameter plugin in parameter \"" + PARAMETER_CLASS_NAME
171 LOGGER.warn(errorMessage);
172 throw new ParameterRuntimeException(errorMessage);
175 return eventProtocolParameters;