org.directwebremoting.json.parse.impl.ReflectionJsonDecoder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of dwr Show documentation

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.

The newest version!

package org.directwebremoting.json.parse.impl;

import java.lang.reflect.InvocationTargetException;
import java.util.Collection;

import org.directwebremoting.json.parse.JsonDecoder;
import org.directwebremoting.json.parse.JsonParseException;
import org.directwebremoting.util.LocalUtil;

/**
 * A {@link JsonDecoder} that de-serializes the data into an existing set of
 * objects.
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class ReflectionJsonDecoder extends StatefulJsonDecoder
{
    private final Class marshallInto;

    /**
     * @param marshallInto ...
     */
    public ReflectionJsonDecoder(Class marshallInto)
    {
        this.marshallInto = marshallInto;
    }

    @Override
    protected Object createObject(Object parent, String propertyName) throws JsonParseException
    {
        return createArray(parent, propertyName);
    }

    @Override
    protected Object createArray(Object parent, String propertyName) throws JsonParseException
    {
        if (parent == null)
        {
            return createType(marshallInto);
        }
        else
        {
            Class type = LocalUtil.getPropertyType(parent.getClass(), propertyName);
            return createType(type);
        }
    }

    @Override
    protected void addMemberToObject(Object parent, String propertyName, Object member) throws JsonParseException
    {
        try
        {
            LocalUtil.setProperty(parent, propertyName, member);
        }
        catch (SecurityException | InvocationTargetException | IllegalArgumentException | NoSuchMethodException |
               IllegalAccessException ex)
        {
            throw new JsonParseException(ex);
        }
    }

    @Override
    protected void addMemberToArray(Object parent, Object member)
    {
        @SuppressWarnings("unchecked")
        Collection