[jboss-cvs] jboss-seam/src/main/org/jboss/seam/core ...

[Gavin King]

  User: gavin   
  Date: 06/10/08 20:17:30

  Added:       src/main/org/jboss/seam/core  SafeActions.java
  Log:
  forgt to add
  
  Revision  Changes    Path
  1.1      date: 2006/10/09 00:17:30;  author: gavin;  state: Exp;jboss-seam/src/main/org/jboss/seam/core/SafeActions.java
  
  Index: SafeActions.java
  ===================================================================
  package org.jboss.seam.core;
  
  import static org.jboss.seam.InterceptionType.NEVER;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.faces.context.FacesContext;
  
  import org.jboss.seam.Component;
  import org.jboss.seam.ScopeType;
  import org.jboss.seam.annotations.Intercept;
  import org.jboss.seam.annotations.Name;
  import org.jboss.seam.annotations.Scope;
  import org.jboss.seam.contexts.Contexts;
  
  @Scope(ScopeType.APPLICATION)
  @Intercept(NEVER)
  @Name("oeg.jboss.seam.core.safeActions")
  public class SafeActions
  {
     
     private Set<String> safeActions = Collections.synchronizedSet( new HashSet<String>() );
     
     public static String toActionId(String viewId, String expression)
     {
        return viewId.substring(1) + ':' + expression.substring( 2, expression.length()-1 );
     }
     
     public static String toAction(String id)
     {
        int loc = id.indexOf(':');
        if (loc<0) throw new IllegalArgumentException();
        return "#{" + id.substring(loc+1) + "}";
     }
     
     public void addSafeAction(String id)
     {
        safeActions.add(id);
     }
     
     public boolean isActionSafe(String id)
     {
        if ( safeActions.contains(id) ) return true;
        
        int loc = id.indexOf(':');
        if (loc<0) throw new IllegalArgumentException();
        String viewId = id.substring(0, loc);
        String action = "\"#{" + id.substring(loc+1) + "}\"";
        
        InputStream is = FacesContext.getCurrentInstance().getExternalContext().getResourceAsStream(viewId);
        if (is==null) throw new IllegalStateException();
        BufferedReader reader = new BufferedReader( new InputStreamReader(is) );
        try
        {
           while ( reader.ready() ) 
           {
              if ( reader.readLine().contains(action) ) 
              {
                 addSafeAction(id);
                 return true;
              }
           }
           return false;
        }
        catch (IOException ioe)
        {
           throw new RuntimeException(ioe);
        }
        finally
        {
           try
           {
              reader.close();
           }
           catch (IOException ioe) {
              throw new RuntimeException(ioe);
           }
        }
     }
     
     public static SafeActions instance()
     {
        if ( !Contexts.isApplicationContextActive() )
        {
           throw new IllegalStateException("No active application context");
        }
        return (SafeActions) Component.getInstance(SafeActions.class, ScopeType.APPLICATION, true);
     }
     
  }