/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/sam/trunk/samigo-app/src/java/com/corejsf/util/Tags.java $
* $Id: Tags.java 106463 2012-04-02 12:20:09Z david.horwitz@uct.ac.za $
***********************************************************************************
* Copyright (c) 2004 Sun Microsystems from the Java Series, Core Java ServerFaces
* source freely distributable.
* see http://www.sun.com/books/java_series.html
***********************************************************************************
*
* Copyright (c) 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,
Double.valueOf(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,
Boolean.valueOf(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 Boolean.valueOf(r.toString());
}
else return Boolean.valueOf(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; }
}
}