nh.examples.springintegration.order.framework.domain.internal.ReflectionHelper.java Source code

Introduction

Here is the source code for nh.examples.springintegration.order.framework.domain.internal.ReflectionHelper.java

Source

/**********************************************************************
 * Copyright (c) 2010 Nils Hartmann and others
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Nils Hartmann initial implementation
 **********************************************************************/
package nh.examples.springintegration.order.framework.domain.internal;

import static com.google.common.base.Preconditions.checkNotNull;
import static java.lang.String.format;

import java.lang.reflect.Method;

import org.springframework.util.ReflectionUtils;

/**
 * @author Nils Hartmann (nils@nilshartmann.net)
 * 
 */
public class ReflectionHelper {

    public static Method getAccessibleMethod(String name, Class<?> targetClass, Object parameter) {
        checkNotNull(name);
        checkNotNull(targetClass);
        checkNotNull(parameter);

        Method executeMethod = ReflectionUtils.findMethod(targetClass, name, parameter.getClass());
        if (executeMethod == null) {
            throw new IllegalStateException(format("No '%s'-method for command type %s found on class %s", name,
                    parameter.getClass().getName(), targetClass.getName()));
        }
        ReflectionUtils.makeAccessible(executeMethod);

        return executeMethod;
    }

}