/*
* 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.shared_tomahawk.taglib;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.el.ELContext;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.component.ActionSource2;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UICommand;
import javax.faces.component.UIComponent;
import javax.faces.component.UIGraphic;
import javax.faces.component.UIParameter;
import javax.faces.component.UISelectBoolean;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.event.MethodExpressionActionListener;
import javax.faces.event.MethodExpressionValueChangeListener;
import javax.faces.validator.MethodExpressionValidator;
/**
* @author Manfred Geiler (latest modification by $Author: skitching $)
* @author Bruno Aranda (JSR-252)
* @version $Revision: 673827 $ $Date: 2008-07-03 16:46:23 -0500 (Thu, 03 Jul 2008) $
*
* @since 1.2
*/
public class UIComponentELTagUtils
{
private static final Log log = LogFactory.getLog(UIComponentELTagUtils.class);
private UIComponentELTagUtils() {} //util class, no instantiation allowed
/**
* @since 1.2
*/
public static void setIntegerProperty(UIComponent component,
String propName,
ValueExpression value)
{
setIntegerProperty(component, propName, value, null);
}
/**
* @since 1.2
*/
public static void setIntegerProperty(UIComponent component,
String propName,
ValueExpression value,
Integer defaultValue)
{
if (value != null)
{
if (value.isLiteralText())
{
component.getAttributes().put(propName, Integer.valueOf(value.getExpressionString()));
}
else
{
component.setValueExpression(propName, value);
}
}
else
{
if (defaultValue != null)
{
component.getAttributes().put(propName, defaultValue);
}
}
}
/**
* @since 1.2
*/
public static void setLongProperty(UIComponent component,
String propName,
ValueExpression value)
{
setLongProperty(component, propName, value, null);
}
/**
* @since 1.2
*/
public static void setLongProperty(UIComponent component,
String propName,
ValueExpression value,
Long defaultValue)
{
if (value != null)
{
if (value.isLiteralText())
{
component.getAttributes().put(propName, Long.valueOf(value.getExpressionString()));
}
else
{
component.setValueExpression(propName, value);
}
}
else
{
if (defaultValue != null)
{
component.getAttributes().put(propName, defaultValue);
}
}
}
/**
* @since 1.2
*/
public static void setStringProperty(UIComponent component,
String propName,
ValueExpression value)
{
setStringProperty(component, propName, value, null);
}
/**
* @since 1.2
*/
public static void setStringProperty(UIComponent component,
String propName,
ValueExpression value,
String defaultValue)
{
if (value != null)
{
if (value.isLiteralText())
{
component.getAttributes().put(propName, value.getExpressionString());
}
else
{
component.setValueExpression(propName, value);
}
}
else
{
if (defaultValue != null)
{
component.getAttributes().put(propName, defaultValue);
}
}
}
/**
* @since 1.2
*/
public static void setBooleanProperty(UIComponent component,
String propName,
ValueExpression value)
{
setBooleanProperty(component, propName, value, null);
}
/**
* @since 1.2
*/
public static void setBooleanProperty(UIComponent component,
String propName,
ValueExpression value,
Boolean defaultValue)
{
if (value != null)
{
if (value.isLiteralText())
{
component.getAttributes().put(propName, Boolean.valueOf(value.getExpressionString()));
}
else
{
component.setValueExpression(propName, value);
}
}
else
{
if (defaultValue != null)
{
component.getAttributes().put(propName, defaultValue);
}
}
}
/**
* @since 1.2
*/
public static void setValueProperty(FacesContext context,
UIComponent component,
ValueExpression value)
{
if (value != null)
{
if (!value.isLiteralText())
{
component.setValueExpression(org.apache.myfaces.shared_tomahawk.renderkit.JSFAttr.VALUE_ATTR, value);
}
else if (component instanceof UICommand)
{
((UICommand)component).setValue(value.getExpressionString());
}
else if (component instanceof UIParameter)
{
((UIParameter)component).setValue(value.getExpressionString());
}
else if (component instanceof UISelectBoolean)
{
((UISelectBoolean)component).setValue(Boolean.valueOf(value.getExpressionString()));
}
else if (component instanceof UIGraphic)
{
((UIGraphic)component).setValue(value.getExpressionString());
}
//Since many input components are ValueHolders the special components
//must come first, ValueHolder is the last resort.
else if (component instanceof ValueHolder)
{
((ValueHolder)component).setValue(value.getExpressionString());
}
else
{
log.error("Component " + component.getClass().getName() + " is no ValueHolder, cannot set value.");
}
}
}
/**
* @since 1.2
*/
public static void setConverterProperty(FacesContext context,
UIComponent component,
ValueExpression value)
{
if (value != null)
{
if (component instanceof ValueHolder)
{
if (value.isLiteralText())
{
FacesContext facesContext = FacesContext.getCurrentInstance();
Converter converter = facesContext.getApplication().createConverter(value.getExpressionString());
((ValueHolder)component).setConverter(converter);
}
else
{
component.setValueExpression(org.apache.myfaces.shared_tomahawk.renderkit.JSFAttr.CONVERTER_ATTR, value);
}
}
else
{
log.error("Component " + component.getClass().getName() + " is no ValueHolder, cannot set value.");
}
}
}
/**
* @since 1.2
*/
public static void addValidatorProperty(FacesContext context,
UIComponent component,
MethodExpression validator)
{
if (validator != null)
{
if (!(component instanceof EditableValueHolder))
{
throw new IllegalArgumentException("Component " + component.getClientId(context) + " is no EditableValueHolder");
}
((EditableValueHolder)component).addValidator(new MethodExpressionValidator(validator));
}
}
/**
* @since 1.2
*/
public static void setValueBinding(FacesContext context,
UIComponent component,
String propName,
ValueExpression value)
{
if (value != null)
{
if (!value.isLiteralText())
{
component.setValueExpression(propName, value);
}
else
{
throw new IllegalArgumentException("Component " + component.getClientId(context) + " attribute " + propName + " must be a value reference, was " + value);
}
}
}
/**
* @since 1.2
*/
public static void setActionProperty(FacesContext context,
UIComponent component,
MethodExpression action)
{
if (action != null)
{
if (!(component instanceof ActionSource2))
{
throw new IllegalArgumentException("Component " + component.getClientId(context) + " is no ActionSource2");
}
((ActionSource2)component).setActionExpression(action);
}
}
/**
* @since 1.2
*/
public static void addActionListenerProperty(FacesContext context,
UIComponent component,
MethodExpression actionListener)
{
if (actionListener != null)
{
if (!(component instanceof ActionSource2))
{
throw new IllegalArgumentException("Component " + component.getClientId(context) + " is no ActionSource");
}
((ActionSource2)component).addActionListener(new MethodExpressionActionListener(actionListener));
}
}
/**
* @since 1.2
*/
public static void addValueChangedListenerProperty(FacesContext context,
UIComponent component,
MethodExpression valueChangedListener)
{
if (valueChangedListener != null)
{
if (!(component instanceof EditableValueHolder))
{
throw new IllegalArgumentException("Component " + component.getClientId(context) + " is no EditableValueHolder");
}
((EditableValueHolder)component).addValueChangeListener(
new MethodExpressionValueChangeListener(valueChangedListener));
}
}
/**
* @since 1.2
*/
public static Object evaluateValueExpression(ELContext elContext, ValueExpression valueExpression )
{
return valueExpression.isLiteralText() ? valueExpression.getExpressionString() : valueExpression.getValue(elContext);
}
/**
* @since 1.2
*/
public static Boolean getBooleanValue(ELContext elContext, ValueExpression valueExpression)
{
if (valueExpression.isLiteralText()){
return Boolean.valueOf(valueExpression.getExpressionString());
}
return (Boolean) valueExpression.getValue(elContext);
}
public static Integer getIntegerValue(ELContext elContext, ValueExpression valueExpression)
{
if (valueExpression.isLiteralText()){
return Integer.valueOf(valueExpression.getExpressionString());
}
return (Integer) valueExpression.getValue(elContext);
}
}