jakarta.faces.view.facelets.ConverterHandler Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
* Copyright 2005-2007 The Apache Software Foundation
*
* Licensed 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 jakarta.faces.view.facelets;
import jakarta.faces.view.ValueHolderAttachedObjectHandler;
/**
*
* Handles setting a {@link jakarta.faces.convert.Converter} instance on a {@link jakarta.faces.component.ValueHolder}
* parent. Will wire all attributes set to the Converter instance created/fetched. Uses the "binding"
* attribute for grabbing instances to apply attributes to.
*
*
*
* Will only set/create Converter if the passed UIComponent's parent is
* null, signifying that it wasn't restored from an existing tree.
*
*
*/
public class ConverterHandler extends FaceletsAttachedObjectHandler implements ValueHolderAttachedObjectHandler {
private String converterId;
private TagHandlerDelegate helper;
/**
* Creates a new ConverterHandler using the given config.
*
* @param config converter config where the converter Id is taken from.
*/
public ConverterHandler(ConverterConfig config) {
super(config);
converterId = config.getConverterId();
}
@Override
protected TagHandlerDelegate getTagHandlerDelegate() {
if (helper == null) {
helper = delegateFactory.createConverterHandlerDelegate(this);
}
return helper;
}
/**
* Returns the converter Id.
*
*
* The converter Id is taken from the attribute "converterId"
*
* @param ctx facelet context used to resolve the converter Id from an attribute.
* @return the converter Id.
*/
public String getConverterId(FaceletContext ctx) {
if (converterId == null) {
TagAttribute idAttr = getAttribute("converterId");
if (idAttr == null) {
return null;
}
return idAttr.getValue(ctx);
}
return converterId;
}
}