DelegateBoManager.java

package ddth.dasp.framework.bo;

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

/**
 * Delegate-enabled Business Object manager.
 * 
 * @author NBThanh <btnguyen2k@gmail.com>
 * @version 0.1.0
 */
public abstract class DelegateBoManager<T> extends CacheBoManager {

    private T delegatedBoManager;

    protected T getDelegatedBoManager() {
        return delegatedBoManager;
    }

    public void setDelegatedBoManager(T delegatedBoManager) {
        this.delegatedBoManager = delegatedBoManager;
    }

    /**
     * Delegates a call to the delegated object.
     * 
     * @param methodName
     * @param params
     * @param paramTypes
     * @return
     * @throws SecurityException
     * @throws NoSuchMethodException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    protected Object delegate(String methodName, Object[] params, Class<?>[] paramTypes)
            throws SecurityException, NoSuchMethodException, IllegalArgumentException,
            IllegalAccessException, InvocationTargetException {
        if (delegatedBoManager == null) {
            return null;
        }
        Method m = delegatedBoManager.getClass().getMethod(methodName, paramTypes);
        Object result = m.invoke(delegatedBoManager, params);
        return result;
    }
}