/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.extensions.markup.html.form.select;
import org.apache.wicket.Component;
import org.apache.wicket.IGenericComponent;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.model.IModel;
/**
* Component representing a single <code><option></code> html element
*
* @see Select
* @param <T>
*
* @author Igor Vaynberg
*/
public class SelectOption<T> extends WebMarkupContainer implements IGenericComponent<T, SelectOption<T>>
{
private static final long serialVersionUID = 1L;
/**
* page-scoped uuid of this option. this property must not be accessed directly, instead
* {@link #getValue()} must be used
*/
private int uuid = -1;
/**
* @see WebMarkupContainer#WebMarkupContainer(String)
*/
public SelectOption(final String id)
{
super(id);
}
/**
* @param id
* @param model
* @see WebMarkupContainer#WebMarkupContainer(String, IModel)
*/
public SelectOption(final String id, final IModel<T> model)
{
super(id, model);
}
/**
* Form submission value used for this select option. This string will appear as the value of
* the <code>value</code> html attribute for the <code>option</code> tag.
*
* @return form submission value
*/
public String getValue()
{
if (uuid < 0)
{
uuid = getPage().getAutoIndex();
}
return "option" + uuid;
}
/**
* @see Component#onComponentTag(ComponentTag)
* @param tag
* the abstraction representing html tag of this component
*/
@Override
protected void onComponentTag(final ComponentTag tag)
{
// must be attached to <option .../> tag
checkComponentTag(tag, "option");
Select<?> select = findParent(Select.class);
if (select == null)
{
throw new WicketRuntimeException(
"SelectOption component [" +
getPath() +
"] cannot find its parent Select. All SelectOption components must be a child of or below in the hierarchy of a Select component.");
}
final String uuid = getValue();
// assign value
tag.put("value", uuid);
if (select.isSelected(this))
{
tag.put("selected", "selected");
}
// Default handling for component tag
super.onComponentTag(tag);
}
}