javax.faces.view.facelets.ConverterHandler Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 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 javax.faces.view.facelets;
import javax.faces.view.ValueHolderAttachedObjectHandler;
/**
* Handles setting a {@link
* javax.faces.convert.Converter} instance on a {@link
* javax.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;
public ConverterHandler(ConverterConfig config) {
super(config);
this.converterId = config.getConverterId();
}
@Override
protected TagHandlerDelegate getTagHandlerDelegate() {
if (null == helper) {
helper = delegateFactory.createConverterHandlerDelegate(this);
}
return helper;
}
public String getConverterId(FaceletContext ctx) {
if (converterId == null) {
TagAttribute idAttr = getAttribute("converterId");
if (idAttr == null) {
return null;
} else {
return idAttr.getValue(ctx);
}
}
return converterId;
}
}