//$Id: FacesExpressions.java 9684 2008-12-01 21:41:20Z dan.j.allen $
package org.jboss.seam.faces;
import static org.jboss.seam.annotations.Install.FRAMEWORK;
import javax.el.ELContext;
import javax.faces.context.FacesContext;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.intercept.BypassInterceptors;
import org.jboss.seam.contexts.FacesLifecycle;
import org.jboss.seam.core.Expressions;
/**
* Factory for method and value bindings in a JSF environment.
*
* @author Gavin King
*/
@Scope(ScopeType.APPLICATION)
@BypassInterceptors
@Install(precedence=FRAMEWORK, classDependencies="javax.faces.context.FacesContext")
@Name("org.jboss.seam.core.expressions")
public class FacesExpressions extends Expressions
{
/**
* Get an appropriate ELContext. If there is an active JSF request,
* use JSF's ELContext. Otherwise, use one that we created.
*/
@Override
public ELContext getELContext()
{
return isFacesContextActive() ? FacesContext.getCurrentInstance().getELContext() : super.getELContext();
}
@Override
protected boolean isFacesContextActive()
{
return FacesContext.getCurrentInstance() != null && FacesLifecycle.getPhaseId() != null;
}
}