/*
* Copyright (c) 2009 WiQuery team
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.odlabs.wiquery.ui.autocomplete;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.markup.html.form.IChoiceRenderer;
import org.apache.wicket.model.IModel;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* $Id: AutocompleteComponent.java 463 2010-10-19 12:14:45Z richardjohnwilkinson@gmail.com
* $
* <p>
* Creates an autocomplete UI component which will bind on a Wicket model
* </p>
*
* @author Julien Roche
* @param <T>
* The model object type
* @since 1.1
*/
public abstract class AutocompleteComponent<T> extends AbstractAutocompleteComponent<T>
{
// Constants
/** Constant of serialization */
private static final long serialVersionUID = -3377109382248062940L;
// Properties
private final IModel< ? extends List< ? extends T>> list;
/**
* Constructor
*
* @param id
* Wicket identifier
* @param model
* Model of the default value
* @param list
* List of possibles values
*/
public AutocompleteComponent(String id, final IModel<T> model,
final IModel< ? extends List< ? extends T>> list)
{
super(id, model);
this.list = list;
}
/**
* Constructor
*
* @param id
* Wicket identifier
* @param model
* Model of the default value
* @param list
* List of possibles values
*/
public AutocompleteComponent(String id, final IModel<T> model,
final IModel< ? extends List< ? extends T>> list,
IChoiceRenderer< ? super T> choiceRenderer)
{
super(id, model, choiceRenderer);
this.list = list;
}
@Override
protected void onBeforeRenderAutocomplete(Autocomplete< ? > autocomplete)
{
StringWriter sw = new StringWriter();
try
{
JsonGenerator gen = new JsonFactory().createGenerator(sw);
List<Object> json = new ArrayList<Object>();
T defaultValue = AutocompleteComponent.this.getModelObject();
AutocompleteJson value = null;
Integer index = 0;
for (T obj : AutocompleteComponent.this.list.getObject())
{
index++;
value = newAutocompleteJson(index, obj);
json.add(value);
if (obj.equals(defaultValue))
{
autocomplete.setDefaultModelObject(value.getLabel());
getAutocompleteHidden().setModelObject(value.getValueId());
}
}
new ObjectMapper().writeValue(gen, json);
}
catch (IOException e)
{
throw new WicketRuntimeException(e);
}
autocomplete.getOptions().put("source", sw.toString());
}
@Override
protected List< ? extends T> getChoices()
{
return list.getObject();
}
@Override
protected void onDetach()
{
super.onDetach();
if (list != null)
{
list.detach();
}
}
}