org.apache.myfaces.view.facelets.tag.jsf.ComponentRule Maven / Gradle / Ivy
/*
* 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.view.facelets.tag.jsf;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.MetaRule;
import javax.faces.view.facelets.Metadata;
import javax.faces.view.facelets.MetadataTarget;
import javax.faces.view.facelets.TagAttribute;
/**
*
* @author Jacob Hookom
* @version $Id: ComponentRule.java,v 1.4 2008/07/13 19:01:47 rlubke Exp $
*/
final class ComponentRule extends MetaRule
{
final class LiteralAttributeMetadata extends Metadata
{
private final String _name;
private final String _value;
public LiteralAttributeMetadata(String name, String value)
{
_name = name;
_value = value;
}
public void applyMetadata(FaceletContext ctx, Object instance)
{
((UIComponent) instance).getAttributes().put(_name, _value);
}
}
final static class ValueExpressionMetadata extends Metadata
{
private final String _name;
private final TagAttribute _attr;
private final Class _type;
public ValueExpressionMetadata(String name, Class type, TagAttribute attr)
{
_name = name;
_attr = attr;
_type = type;
}
public void applyMetadata(FaceletContext ctx, Object instance)
{
((UIComponent) instance).setValueExpression(_name, _attr.getValueExpression(ctx, _type));
}
}
//private final static Logger log = Logger.getLogger("facelets.tag.component");
private final static Logger log = Logger.getLogger(ComponentRule.class.getName());
public final static ComponentRule Instance = new ComponentRule();
public ComponentRule()
{
super();
}
public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta)
{
if (meta.isTargetInstanceOf(UIComponent.class))
{
// if component and dynamic, then must set expression
if (!attribute.isLiteral())
{
Class type = meta.getPropertyType(name);
if (type == null)
{
type = Object.class;
}
return new ValueExpressionMetadata(name, type, attribute);
}
else if (meta.getWriteMethod(name) == null)
{
// this was an attribute literal, but not property
warnAttr(attribute, meta.getTargetClass(), name);
return new LiteralAttributeMetadata(name, attribute.getValue());
}
}
return null;
}
private static void warnAttr(TagAttribute attr, Class type, String n)
{
if (log.isLoggable(Level.FINER))
{
log.finer(attr + " Property '" + n + "' is not on type: " + type.getName());
}
}
}