/*
* 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.myfaces.tobago.facelets;
import javax.el.ELException;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagAttributeException;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagException;
import javax.faces.view.facelets.TagHandler;
import java.io.IOException;
public class ConverterHandler extends TagHandler {
private final TagAttribute converterId;
private final TagAttribute binding;
public ConverterHandler(TagConfig config) {
super(config);
binding = getAttribute("binding");
converterId = getAttribute("type");
}
public void apply(FaceletContext faceletContext, UIComponent parent)
throws IOException, FacesException, ELException {
if (parent instanceof ValueHolder) {
if (ComponentHandler.isNew(parent)) {
ValueHolder valueHolder = (ValueHolder) parent;
Converter converter = null;
ValueExpression valueExpression = null;
if (binding != null) {
valueExpression = binding.getValueExpression(faceletContext, Converter.class);
converter = (Converter) valueExpression.getValue(faceletContext);
}
if (converter == null) {
try {
converter = FacesContext.getCurrentInstance().getApplication().createConverter(
(String) converterId.getValueExpression(faceletContext, String.class).getValue(faceletContext));
} catch (Exception e) {
throw new TagAttributeException(tag, converterId, e.getCause());
}
if (valueExpression != null) {
valueExpression.setValue(faceletContext, converter);
}
}
if (converter != null) {
valueHolder.setConverter(converter);
}
// TODO else LOG.warn?
}
} else {
throw new TagException(tag, "Parent is not of type ValueHolder, type is: " + parent);
}
}
}