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package com.sun.faces.application;
import static java.util.logging.Level.FINE;
import java.text.MessageFormat;
import java.util.logging.Logger;
import javax.faces.FacesException;
import javax.faces.application.NavigationHandler;
import javax.faces.component.ActionSource;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.MethodBinding;
import javax.faces.el.MethodNotFoundException;
import javax.faces.event.ActionEvent;
import javax.faces.event.ActionListener;
import com.sun.faces.util.FacesLogger;
/**
* This action listener implementation processes action events during the
* <em>Apply Request Values</em> or <em>Invoke Application</em>
* phase of the request processing lifecycle (depending upon the
* <code>immediate</code> property of the {@link ActionSource} that
* queued this event. It invokes the specified application action method,
* and uses the logical outcome value to invoke the default navigation handler
* mechanism to determine which view should be displayed next.</p>
*/
public class ActionListenerImpl implements ActionListener {
// Log instance for this class
private static final Logger LOGGER = FacesLogger.APPLICATION.getLogger();
// --------------------------------------------- Methods From ActionListener
@SuppressWarnings("deprecation")
@Override
public void processAction(ActionEvent event) {
if (LOGGER.isLoggable(FINE)) {
LOGGER.fine(MessageFormat.format("processAction({0})", event.getComponent().getId()));
}
UIComponent source = event.getComponent();
FacesContext context = event.getFacesContext();
MethodBinding binding = ((ActionSource) source).getAction();
invokeNavigationHandling(
context, source, binding,
getNavigationOutcome(context, binding));
// Trigger a switch to Render Response if needed
context.renderResponse();
}
@SuppressWarnings("deprecation")
private String getNavigationOutcome(FacesContext context, MethodBinding binding) {
if (binding != null) {
try {
Object invokeResult;
if ((invokeResult = binding.invoke(context, null)) != null) {
return invokeResult.toString();
}
// else, default to null, as returned at the end
} catch (MethodNotFoundException e) {
if (LOGGER.isLoggable(FINE)) {
LOGGER.log(FINE, e.getMessage(), e);
}
throw new FacesException(binding.getExpressionString() + ": " + e.getMessage(), e);
}
catch (EvaluationException e) {
if (LOGGER.isLoggable(FINE)) {
LOGGER.log(FINE, e.getMessage(), e);
}
throw new FacesException(binding.getExpressionString() + ": " + e.getMessage(), e);
}
}
return null;
}
@SuppressWarnings("deprecation")
private void invokeNavigationHandling(FacesContext context, UIComponent source, MethodBinding binding, String outcome) {
NavigationHandler navHandler = context.getApplication().getNavigationHandler();
String toFlowDocumentId = (String) source.getAttributes().get(TO_FLOW_DOCUMENT_ID_ATTR_NAME);
if (toFlowDocumentId == null) {
navHandler.handleNavigation(context,
binding != null ?
binding.getExpressionString() : null,
outcome);
} else {
navHandler.handleNavigation(context,
binding != null ?
binding.getExpressionString() : null,
outcome, toFlowDocumentId);
}
}
}