org.directwebremoting.create.NewCreator Maven / Gradle / Ivy

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DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boilerplate code between the web browser and your Java code. This version 4.0.2 works with Jakarta Servlet 4.0.2.

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package org.directwebremoting.create;

import org.directwebremoting.extend.AbstractCreator;
import org.directwebremoting.extend.Creator;
import org.directwebremoting.util.LocalUtil;

/**
 * A creator that simply uses the default constructor each time it is called.
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class NewCreator extends AbstractCreator implements Creator
{
    /**
     * What sort of class do we create?
     * @param classname The name of the class
     */
    public void setClass(String classname)
    {
        try
        {
            clazz = LocalUtil.classForName(classname);
            if (getJavascript() == null)
            {
                setJavascript(clazz.getSimpleName());
            }
        }
        catch (ExceptionInInitializerError ex)
        {
            throw new IllegalArgumentException("Error loading class: " + classname, ex);
        }
        catch (ClassNotFoundException ex)
        {
            throw new IllegalArgumentException("Class not found: " + classname, ex);
        }
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.Creator#getType()
     */
    public Class getType()
    {
        return clazz;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.Creator#getInstance()
     */
    public Object getInstance() throws InstantiationException
    {
        try
        {
            return clazz.getDeclaredConstructor().newInstance();
        }
        catch (Exception ex)
        {
            throw new InstantiationException("Illegal Access to default constructor on " + clazz.getName());
        }
    }

    /**
     * Sets the class name to create.
     * @param className The name of the class to create
     */
    public void setClassName(String className)
    {
        setClass(className);
    }

    /**
     * Gets the name of the class to create.
     * @return The name of the class to create
     */
    public String getClassName()
    {
        return getType().getName();
    }

    /**
     * The type of the class that we are creating
     */
    private Class clazz;
}