ComplexEObjectListDataProvider.java

/**
 * (C) Copyright 2013 Jabylon (http://www.jabylon.org) 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
 */
/**
 *
 */
package org.jabylon.rest.ui.model;


import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.wicket.markup.repeater.data.IDataProvider;
import org.apache.wicket.model.IModel;
import org.eclipse.emf.cdo.CDOObject;
import org.eclipse.emf.ecore.EStructuralFeature;


/**
 * @author Johannes Utzig (jutzig.dev@googlemail.com)
 */
public class ComplexEObjectListDataProvider<R extends CDOObject>
    implements IDataProvider<R>, IModel<List<R>>
{

    private static final long serialVersionUID = 1L;
    private String featureName;
    private IModel<? extends CDOObject> model;


    public ComplexEObjectListDataProvider(IModel<? extends CDOObject> model, EStructuralFeature feature)
    {
        this.model = model;
        featureName = feature.getName();
    }

    @SuppressWarnings("unchecked")
    @Override
    public Iterator< ? extends R> iterator(long arg0, long arg1)
    {
        CDOObject parent = model.getObject();
        EStructuralFeature feature = parent.eClass().getEStructuralFeature(featureName);
        List<R> result = (List<R>)parent.eGet(feature);
        return result.subList((int)arg0, (int)arg1).iterator();
    }


    @SuppressWarnings("unchecked")
    @Override
    public long size()
    {
        CDOObject parent = model.getObject();;
        EStructuralFeature feature = parent.eClass().getEStructuralFeature(featureName);
        List<R> result = (List<R>)parent.eGet(feature);
        return result.size();
    }



    @Override
    public IModel<R> model(R object)
    {
        return new EObjectModel<R>(object);
    }

    @Override
    public void detach() {
    	model.detach();

    }

    @Override
    public List<R> getObject() {
        CDOObject parent = model.getObject();
        EStructuralFeature feature = parent.eClass().getEStructuralFeature(featureName);
        List<R> result = (List<R>)parent.eGet(feature);
        return result;
    }

    @Override
    public void setObject(List<R> object) {
        CDOObject parent = model.getObject();
        EStructuralFeature feature = parent.eClass().getEStructuralFeature(featureName);
        parent.eSet(feature, new ArrayList<R>(object));
    }
    
    public IModel<? extends CDOObject> getModel() {  
		return model;
	}

}