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/*
 * Copyright 2017 the original author or authors.
 *
 * 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.
 */

package org.awaitility.proxy.internal;

import org.awaitility.core.CheckedExceptionRethrower;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.concurrent.Callable;

/**
 * The Class MethodCaller.
 *
 * @param  the generic type
 */
class MethodCaller implements Callable {

    /**
     * The target.
     */
    final Object target;

    /**
     * The method.
     */
    final Method method;

    /**
     * The args.
     */
    final Object[] args;

    /**
     * Instantiates a new method caller.
     *
     * @param target the target
     * @param method the method
     * @param args   the args
     */
    public MethodCaller(Object target, Method method, Object[] args) {
        this.target = target;
        this.method = method;
        this.args = args;
        method.setAccessible(true);
    }

    /*
       * (non-Javadoc)
       *
       * @see java.util.concurrent.Callable#call()
       */
    @SuppressWarnings("unchecked")
    public T call() throws InvocationTargetException, IllegalAccessException {
        try {
            return (T) method.invoke(target, args);
        } catch (IllegalAccessException e) {
            return CheckedExceptionRethrower.safeRethrow(e);
        } catch (InvocationTargetException e) {
            return CheckedExceptionRethrower.safeRethrow(e.getCause());
        }
    }
}