/*
* 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.taglib;
import java.util.logging.Logger;
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;
/**
* @since 1.2
*/
public class UIComponentELTagUtils
{
//private static final Log log = LogFactory.getLog(UIComponentELTagUtils.class);
private static final Logger log = Logger
.getLogger(UIComponentELTagUtils.class.getName());
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.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.severe("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.renderkit.JSFAttr.CONVERTER_ATTR,
value);
}
}
else
{
log.severe("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);
}
}