org.fabric3.implementation.reflection.jdk.MethodLifecycleInvoker Maven / Gradle / Ivy

Go to download
/*
 * Fabric3
 * Copyright (c) 2009-2013 Metaform Systems
 *
 * Fabric3 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version, with the
 * following exception:
 *
 * Linking this software statically or dynamically with other
 * modules is making a combined work based on this software.
 * Thus, the terms and conditions of the GNU General Public
 * License cover the whole combination.
 *
 * As a special exception, the copyright holders of this software
 * give you permission to link this software with independent
 * modules to produce an executable, regardless of the license
 * terms of these independent modules, and to copy and distribute
 * the resulting executable under terms of your choice, provided
 * that you also meet, for each linked independent module, the
 * terms and conditions of the license of that module. An
 * independent module is a module which is not derived from or
 * based on this software. If you modify this software, you may
 * extend this exception to your version of the software, but
 * you are not obligated to do so. If you do not wish to do so,
 * delete this exception statement from your version.
 *
 * Fabric3 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the
 * GNU General Public License along with Fabric3.
 * If not, see .
 *
 * ----------------------------------------------------
 *
 * Portions originally based on Apache Tuscany 2007
 * licensed under the Apache 2.0 license.
 *
 */
package org.fabric3.implementation.reflection.jdk;

import org.fabric3.implementation.pojo.spi.reflection.LifecycleInvoker;
import org.fabric3.implementation.pojo.spi.reflection.ObjectCallbackException;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Performs an invocation on a method of a given instance
 */
public class MethodLifecycleInvoker implements LifecycleInvoker {
    private final Method method;

    /**
     * Instantiates an invoker for the given method.
     *
     * @param method the method to invoke on
     */
    public MethodLifecycleInvoker(Method method) {
        assert method != null;
        this.method = method;
        this.method.setAccessible(true);
    }

    public void invoke(Object instance) throws ObjectCallbackException {
        try {
            method.invoke(instance);
        } catch (IllegalArgumentException e) {
            String signature = getSignature();
            throw new ObjectCallbackException("Invalid arguments provided when invoking method: " + signature, e.getCause());
        } catch (IllegalAccessException e) {
            String signature = getSignature();
            throw new ObjectCallbackException("Method is not accessible: " + signature);
        } catch (InvocationTargetException e) {
            String signature = getSignature();
            throw new ObjectCallbackException("Exception thrown when invoking method: " + signature, e.getCause());
        }
    }

    private String getSignature() {
        String name = method.getName();
        return method.getDeclaringClass().getName() + "." + name + "()";
    }

}