Execution.java :  » MVC » webwind » org » expressme » webwind » Java Open Source

package org.expressme.webwind;

import java.lang.reflect.InvocationTargetException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Execution contains all information that needed to invocation on method.
 * 
 * @author Michael Liao (askxuefeng@gmail.com)
 */
public class Execution {

    public final HttpServletRequest request;
    public final HttpServletResponse response;
    private final Action action;
    private final Object[] args;

    public Execution(HttpServletRequest request, HttpServletResponse response, Action action, Object[] args) {
        this.request = request;
        this.response = response;
        this.action = action;
        this.args = args;
    }

    public Object execute() throws Exception {
        try {
            return action.method.invoke(action.instance, args);
        }
        catch (InvocationTargetException e) {
            Throwable t = e.getCause();
            if (t!=null && t instanceof Exception)
                throw (Exception) t;
            throw e;
        }
    }
}