svn commit: r406333 - /myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java

[lo...@apache.org]

Author: lofwyr
Date: Sun May 14 07:14:56 2006
New Revision: 406333

URL: http://svn.apache.org/viewcvs?rev=406333&view=rev
Log:
Utility to remove a managed-bean from any scope

Modified:
    myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java

Modified: myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java
URL: http://svn.apache.org/viewcvs/myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java?rev=406333&r1=406332&r2=406333&view=diff
==============================================================================
--- myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java (original)
+++ myfaces/tobago/trunk/core/src/main/java/org/apache/myfaces/tobago/util/VariableResolverUtil.java Sun May 14 07:14:56 2006
@@ -19,12 +19,30 @@
 import javax.faces.application.Application;
 import javax.faces.context.FacesContext;
 import javax.faces.el.VariableResolver;
+import javax.faces.el.ValueBinding;
 
 public class VariableResolverUtil {
 
+  private VariableResolverUtil() {
+  }
+
   public static Object resolveVariable(FacesContext context, String variable) {
     Application application = context.getApplication();
     VariableResolver variableResolver = application.getVariableResolver();
     return variableResolver.resolveVariable(context, variable);
+  }
+
+  /**
+   * Clears the value of the variable.
+   * Useful for cleaning up e.g. a session or application variable
+   * to save memory without the knowledge of the scope.
+   * Also useful to enforce a new creation of a managed-bean.
+   * @param context
+   * @param variable
+   */
+  public static void clearVariable(FacesContext context, String variable) {
+    Application application = context.getApplication();
+    ValueBinding valueBinding = application.createValueBinding("#{" + variable + "}");
+    valueBinding.setValue(context, null);
   }
 }