/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.ajax4jsf.taglib.html.facelets;
import javax.faces.application.Application;
import javax.faces.component.ActionSource;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import org.ajax4jsf.Messages;
import org.ajax4jsf.component.UIActionParameter;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.el.LegacyValueBinding;
import com.sun.facelets.tag.MetaRule;
import com.sun.facelets.tag.MetaRuleset;
import com.sun.facelets.tag.Metadata;
import com.sun.facelets.tag.MetadataTarget;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagAttributeException;
import com.sun.facelets.tag.jsf.ComponentConfig;
import com.sun.facelets.tag.jsf.ComponentHandler;
/**
* @author shura (latest modification by $Author: alexsmirnov $)
* @version $Revision: 1.1.2.1 $ $Date: 2007/02/01 15:31:23 $
*
*/
public class ActionParamHandler extends ComponentHandler {
/**
* @author shura (latest modification by $Author: alexsmirnov $)
* @version $Revision: 1.1.2.1 $ $Date: 2007/02/01 15:31:23 $
*
*/
public static class ActionParamMetaRule extends MetaRule {
/* (non-Javadoc)
* @see org.ajax4jsf.tag.SuggestionHandler.SuggestionMetaRule#applyRule(java.lang.String, com.sun.facelets.tag.TagAttribute, com.sun.facelets.tag.MetadataTarget)
*/
public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta) {
if (meta.isTargetInstanceOf(UIActionParameter.class)) {
if ("assignTo".equals(name)) {
return new AssignToValueBindingMetadata(attribute);
} else if ("converter".equals(name)) {
if (attribute.isLiteral()) {
return new LiteralConverterMetadata(attribute.getValue());
} else {
return new DynamicConverterMetadata(attribute);
}
}
}
return null;
}
}
final static class LiteralConverterMetadata extends Metadata {
private final String converterId;
public LiteralConverterMetadata(String converterId) {
this.converterId = converterId;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIActionParameter) instance).setConverter(ctx.getFacesContext()
.getApplication().createConverter(this.converterId));
}
}
final static class DynamicConverterMetadata extends Metadata {
private final TagAttribute attr;
public DynamicConverterMetadata(TagAttribute attr) {
this.attr = attr;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIActionParameter) instance).setConverter((Converter) this.attr
.getObject(ctx, Converter.class));
}
}
final static class AssignToValueBindingMetadata extends Metadata {
private final TagAttribute attr;
public AssignToValueBindingMetadata(TagAttribute attr) {
this.attr = attr;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIActionParameter) instance).setAssignToBinding(
new LegacyValueBinding(attr.getValueExpression(ctx,
Object.class)));
}
}
private TagAttribute _assignTo;
private TagAttribute _converter;
/**
* @param config
*/
public ActionParamHandler(ComponentConfig config) {
super(config);
_assignTo = getAttribute("assignTo");
_converter = getAttribute("converter");
if(null != _assignTo) {
if (_assignTo.isLiteral()) {
throw new TagAttributeException(this.tag, this._assignTo, Messages.getMessage(Messages.MUST_BE_EXPRESSION_ERROR));
}
}
// TODO Auto-generated constructor stub
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletHandler#apply(com.sun.facelets.FaceletContext,
* javax.faces.component.UIComponent)
*/
public void onComponentCreated(FaceletContext ctx, UIComponent c, UIComponent parent) {
if (parent instanceof ActionSource)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
Application application = facesContext.getApplication();
if (_assignTo != null) {
UIActionParameter al = (UIActionParameter)c;
// TODO - in jsf 1.2 use ELValueExpression
// al.setAssignToBinding(application.createValueBinding(_assignTo.getValue()));
// if (_converter != null) {
// Converter converter = application.createConverter(_converter.getValue(ctx));
// al.setConverter(converter);
// }
((ActionSource)parent).addActionListener(al);
}
}
}
private static final ActionParamMetaRule actionParamMetaRule = new ActionParamMetaRule();
/* (non-Javadoc)
* @see org.ajax4jsf.tag.AjaxComponentHandler#createMetaRuleset(java.lang.Class)
*/
protected MetaRuleset createMetaRuleset(Class type) {
MetaRuleset metaRules = super.createMetaRuleset(type);
metaRules.addRule(actionParamMetaRule);
return metaRules;
}
}