/*
* 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 javax.faces.component;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ActionEvent;
import javax.faces.event.ActionListener;
import javax.faces.event.FacesEvent;
import javax.faces.event.PhaseId;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;
/**
*
* UICommand is a base abstraction for components that implement ActionSource.
*
* <h4>Events:</h4>
* <table border="1" width="100%" cellpadding="3" summary="">
* <tr bgcolor="#CCCCFF" class="TableHeadingColor">
* <th align="left">Type</th>
* <th align="left">Phases</th>
* <th align="left">Description</th>
* </tr>
* <tr class="TableRowColor">
* <td valign="top"><code>javax.faces.event.ActionEvent</code></td>
* <td valign="top" nowrap>Invoke Application<br>
* Apply Request Values</td>
* <td valign="top">Event delivered when the "action" of the component has been
* invoked; for example, by clicking on a button. The action may result in page
* navigation.</td>
* </tr>
* </table>
*/
@JSFComponent(defaultRendererType = "javax.faces.Button")
public class UICommand extends UIComponentBase implements ActionSource2
{
public static final String COMPONENT_TYPE = "javax.faces.Command";
public static final String COMPONENT_FAMILY = "javax.faces.Command";
private boolean _immediate;
private boolean _immediateSet;
private Object _value;
private MethodExpression _actionExpression;
private MethodBinding _actionListener;
/**
* Construct an instance of the UICommand.
*/
public UICommand()
{
setRendererType("javax.faces.Button");
}
/**
* Specifies the action to take when this command is invoked.
* <p>
* If the value is an expression, it is expected to be a method
* binding EL expression that identifies an action method. An action method
* accepts no parameters and has a String return value, called the action
* outcome, that identifies the next view displayed. The phase that this
* event is fired in can be controlled via the immediate attribute.
* </p>
* <p>
* If the value is a string literal, it is treated as a navigation outcome
* for the current view. This is functionally equivalent to a reference to
* an action method that returns the string literal.
* </p>
*
* @deprecated Use getActionExpression() instead.
*/
@Deprecated
public MethodBinding getAction()
{
MethodExpression actionExpression = getActionExpression();
if (actionExpression instanceof _MethodBindingToMethodExpression)
{
return ((_MethodBindingToMethodExpression) actionExpression)
.getMethodBinding();
}
if (actionExpression != null)
{
return new _MethodExpressionToMethodBinding(actionExpression);
}
return null;
}
/**
* @deprecated Use setActionExpression instead.
*/
@Deprecated
public void setAction(MethodBinding action)
{
if (action != null)
{
setActionExpression(new _MethodBindingToMethodExpression(action));
}
else
{
setActionExpression(null);
}
}
@Override
public void broadcast(FacesEvent event) throws AbortProcessingException
{
super.broadcast(event);
if (event instanceof ActionEvent)
{
FacesContext context = getFacesContext();
MethodBinding mb = getActionListener();
if (mb != null)
{
mb.invoke(context, new Object[]
{ event });
}
ActionListener defaultActionListener = context.getApplication()
.getActionListener();
if (defaultActionListener != null)
{
defaultActionListener.processAction((ActionEvent) event);
}
}
}
@Override
public void queueEvent(FacesEvent event)
{
if (event != null && event instanceof ActionEvent)
{
if (isImmediate())
{
event.setPhaseId(PhaseId.APPLY_REQUEST_VALUES);
}
else
{
event.setPhaseId(PhaseId.INVOKE_APPLICATION);
}
}
super.queueEvent(event);
}
/**
* A boolean value that identifies the phase during which action events
* should fire.
* <p>
* During normal event processing, action methods and action listener methods are fired during the
* "invoke application" phase of request processing. If this attribute is set to "true", these methods
* are fired instead at the end of the "apply request values" phase.
* </p>
*/
@JSFProperty
public boolean isImmediate()
{
if (_immediateSet)
{
return _immediate;
}
ValueExpression expression = getValueExpression("immediate");
if (expression != null)
{
return (Boolean) expression.getValue(getFacesContext()
.getELContext());
}
return false;
}
public void setImmediate(boolean immediate)
{
this._immediate = immediate;
this._immediateSet = true;
}
/**
* The text to display to the user for this command component.
*/
@JSFProperty
public Object getValue()
{
if (_value != null)
{
return _value;
}
ValueExpression expression = getValueExpression("value");
if (expression != null)
{
return expression.getValue(getFacesContext().getELContext());
}
return null;
}
public void setValue(Object value)
{
this._value = value;
}
/**
* The action to take when this command is invoked.
* <p>
* If the value is an expression, it is expected to be a method binding EL expression that identifies
* an action method. An action method accepts no parameters and has a String return value, called the
* action outcome, that identifies the next view displayed. The phase that this event is fired in
* can be controlled via the immediate attribute.
* </p>
* <p>
* If the value is a string literal, it is treated as a navigation outcome for the current view. This
* is functionally equivalent to a reference to an action method that returns the string literal.
* </p>
*/
@JSFProperty(stateHolder = true, returnSignature = "java.lang.Object", jspName = "action")
public MethodExpression getActionExpression()
{
if (_actionExpression != null)
{
return _actionExpression;
}
ValueExpression expression = getValueExpression("actionExpression");
if (expression != null)
{
return (MethodExpression) expression.getValue(getFacesContext()
.getELContext());
}
return null;
}
public void setActionExpression(MethodExpression actionExpression)
{
this._actionExpression = actionExpression;
}
/**
* A method binding EL expression that identifies an action listener method to be invoked if
* this component is activated by the user.
* <p>
* An action listener method accepts a parameter of type javax.faces.event.ActionEvent and returns void.
* The phase that this event is fired in can be controlled via the immediate attribute.
*
* @deprecated
*/
@Deprecated
@JSFProperty(stateHolder = true, returnSignature = "void", methodSignature = "javax.faces.event.ActionEvent")
public MethodBinding getActionListener()
{
if (_actionListener != null)
{
return _actionListener;
}
ValueExpression expression = getValueExpression("actionListener");
if (expression != null)
{
return (MethodBinding) expression.getValue(getFacesContext()
.getELContext());
}
return null;
}
@Deprecated
@JSFProperty(returnSignature="void",methodSignature="javax.faces.event.ActionEvent")
public void setActionListener(MethodBinding actionListener)
{
this._actionListener = actionListener;
}
public void addActionListener(ActionListener listener)
{
addFacesListener(listener);
}
public void removeActionListener(ActionListener listener)
{
removeFacesListener(listener);
}
public ActionListener[] getActionListeners()
{
return (ActionListener[]) getFacesListeners(ActionListener.class);
}
@Override
public Object saveState(FacesContext facesContext)
{
Object[] values = new Object[6];
values[0] = super.saveState(facesContext);
values[1] = _immediate;
values[2] = _immediateSet;
values[3] = _value;
values[4] = saveAttachedState(facesContext, _actionExpression);
values[5] = saveAttachedState(facesContext, _actionListener);
return values;
}
@Override
public void restoreState(FacesContext facesContext, Object state)
{
Object[] values = (Object[]) state;
super.restoreState(facesContext, values[0]);
_immediate = (Boolean) values[1];
_immediateSet = (Boolean) values[2];
_value = values[3];
_actionExpression = (MethodExpression) restoreAttachedState(
facesContext, values[4]);
_actionListener = (MethodBinding) restoreAttachedState(facesContext,
values[5]);
}
@Override
public String getFamily()
{
return COMPONENT_FAMILY;
}
}