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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Copyright (C) 2019 Nordix Foundation.
* Modifications Copyright (C) 2020 AT&T Inc.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.distribution.main.parameters;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import java.lang.reflect.Type;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class deserialises policy forwarder parameters from JSON.
*/
public class PolicyForwarderConfigurationParametersJsonAdapter
implements JsonDeserializer<PolicyForwarderConfigurationParameterGroup> {
private static final Logger LOGGER =
LoggerFactory.getLogger(PolicyForwarderConfigurationParametersJsonAdapter.class);
private static final String PARAMETER_CLASS_NAME = "parameterClassName";
private static final String POLICY_FORWARDER_PARAMETERS = "parameters";
@Override
public PolicyForwarderConfigurationParameterGroup deserialize(final JsonElement json, final Type typeOfT,
final JsonDeserializationContext context) {
final JsonObject jsonObject = json.getAsJsonObject();
final String policyForwarderParameterClassName = getParameterGroupClassName(jsonObject);
final Class<?> policyForwarderParameterClass = getParameterGroupClass(policyForwarderParameterClassName);
return context.deserialize(jsonObject.get(POLICY_FORWARDER_PARAMETERS), policyForwarderParameterClass);
}
private String getParameterGroupClassName(final JsonObject jsonObject) {
final JsonPrimitive classNameJsonPrimitive = ((JsonPrimitive) jsonObject.get(PARAMETER_CLASS_NAME));
if (classNameJsonPrimitive == null || classNameJsonPrimitive.getAsString().length() == 0) {
final String errorMessage = "parameter \"" + PARAMETER_CLASS_NAME + "\" value \""
+ (classNameJsonPrimitive != null ? classNameJsonPrimitive.getAsString() : "null")
+ "\" invalid in JSON file";
LOGGER.warn(errorMessage);
throw new IllegalArgumentException(errorMessage);
}
return classNameJsonPrimitive.getAsString().replaceAll("\\s+", "");
}
private Class<?> getParameterGroupClass(final String policyForwarderParameterClassName) {
Class<?> policyForwarderParameterClass = null;
try {
policyForwarderParameterClass = Class.forName(policyForwarderParameterClassName);
} catch (final ClassNotFoundException e) {
final String errorMessage = "parameter \"" + PARAMETER_CLASS_NAME + "\" value \""
+ policyForwarderParameterClassName + "\", could not find class";
throw new IllegalArgumentException(errorMessage, e);
}
return policyForwarderParameterClass;
}
}
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