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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.gson.internal;
import com.google.gson.Gson;
import com.google.gson.JsonParseException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
/**
* Super class of adapters used to serialize and de-serialize a method.
*/
public class MethodAdapter extends Adapter {
public static final String INVOKE_ERR = "cannot invoke method to serialize/deserialize: ";
/**
* Method used to access the item within an object.
*/
private final Method accessor;
/**
* Constructs the object.
*
* @param gson Gson object providing type adapters
* @param accessor method used to access the item from within an object
* @param type the class of value on which this operates
*/
public MethodAdapter(Gson gson, Method accessor, Type type) {
super(gson, accessor, type);
this.accessor = accessor;
}
/**
* Invokes the accessor method.
*
* @param self object on which to invoke the method
* @param args arguments to be passed to the method
* @return the method's result
*/
public Object invoke(Object self, Object... args) {
try {
return accessor.invoke(self, args);
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
throw new JsonParseException(makeError(INVOKE_ERR), e);
}
}
}
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