/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/postem/trunk/postem-app/src/java/com/corejsf/util/Tags.java $
* $Id: Tags.java 105079 2012-02-24 23:08:11Z ottenhoff@longsight.com $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006, 2008 The Sakai Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ECL-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 com.corejsf.util;
import java.io.Serializable;
import java.util.Iterator;
import java.util.Map;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import javax.faces.el.ValueBinding;
import javax.faces.event.ActionEvent;
import javax.faces.event.ValueChangeEvent;
import javax.faces.webapp.UIComponentTag;
public class Tags {
public static void setString(UIComponent component, String attributeName,
String attributeValue) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue))
setValueBinding(component, attributeName, attributeValue);
else
component.getAttributes().put(attributeName, attributeValue);
}
public static void setInteger(UIComponent component, String attributeName,
String attributeValue) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue))
setValueBinding(component, attributeName, attributeValue);
else
component.getAttributes().put(attributeName, new Integer(attributeValue));
}
public static void setDouble(UIComponent component, String attributeName,
String attributeValue) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue))
setValueBinding(component, attributeName, attributeValue);
else
component.getAttributes().put(attributeName, new Double(attributeValue));
}
public static void setBoolean(UIComponent component, String attributeName,
String attributeValue) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue))
setValueBinding(component, attributeName, attributeValue);
else
component.getAttributes().put(attributeName, new Boolean(attributeValue));
}
public static void setStrings(UIComponent component, Map map) {
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
setString(component, (String) entry.getKey(), (String) entry.getValue());
}
}
public static void setValueBinding(UIComponent component,
String attributeName, String attributeValue) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
ValueBinding vb = app.createValueBinding(attributeValue);
component.setValueBinding(attributeName, vb);
}
public static void setActionListener(UIComponent component,
String attributeValue) {
setMethodBinding(component, "actionListener", attributeValue,
new Class[] { ActionEvent.class });
}
public static void setValueChangeListener(UIComponent component,
String attributeValue) {
setMethodBinding(component, "valueChangeListener", attributeValue,
new Class[] { ValueChangeEvent.class });
}
public static void setValidator(UIComponent component, String attributeValue) {
setMethodBinding(component, "validator", attributeValue, new Class[] {
FacesContext.class, UIComponent.class, Object.class });
}
public static void setAction(UIComponent component, String attributeValue) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue))
setMethodBinding(component, "action", attributeValue, new Class[] {});
else {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
MethodBinding mb = new ActionMethodBinding(attributeValue);
component.getAttributes().put("action", mb);
}
}
public static void setMethodBinding(UIComponent component,
String attributeName, String attributeValue, Class[] paramTypes) {
if (attributeValue == null)
return;
if (UIComponentTag.isValueReference(attributeValue)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
MethodBinding mb = app.createMethodBinding(attributeValue, paramTypes);
component.getAttributes().put(attributeName, mb);
}
}
public static String eval(String expression) {
if (expression == null)
return null;
if (UIComponentTag.isValueReference(expression)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
return "" + app.createValueBinding(expression).getValue(context);
} else
return expression;
}
public static Integer evalInteger(String expression) {
if (expression == null)
return null;
if (UIComponentTag.isValueReference(expression)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
Object r = app.createValueBinding(expression).getValue(context);
if (r == null)
return null;
else if (r instanceof Integer)
return (Integer) r;
else
return new Integer(r.toString());
} else
return new Integer(expression);
}
public static Double evalDouble(String expression) {
if (expression == null)
return null;
if (UIComponentTag.isValueReference(expression)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
Object r = app.createValueBinding(expression).getValue(context);
if (r == null)
return null;
else if (r instanceof Double)
return (Double) r;
else
return new Double(r.toString());
} else
return new Double(expression);
}
public static Boolean evalBoolean(String expression) {
if (expression == null)
return null;
if (UIComponentTag.isValueReference(expression)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
Object r = app.createValueBinding(expression).getValue(context);
if (r == null)
return null;
else if (r instanceof Boolean)
return (Boolean) r;
else
return new Boolean(r.toString());
} else
return new Boolean(expression);
}
private static class ActionMethodBinding extends MethodBinding implements
Serializable {
private String result;
public ActionMethodBinding(String result) {
this.result = result;
}
public Object invoke(FacesContext context, Object params[]) {
return result;
}
public String getExpressionString() {
return result;
}
public Class getType(FacesContext context) {
return String.class;
}
}
}