Add isContainedIn methods on all types of Resource, mostly with default impls

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@383 7e9141cc-0065-0410-87d8-b60c137991c4

jetty-util/src/main/java/org/eclipse/jetty/util/resource/Resource.java

@@ -278,7 +278,10 @@ public abstract class Resource implements Serializable
         return newResource(url,useCaches);
     }
     
-    
+    public static boolean isContainedIn (Resource r, Resource containingResource) throws MalformedURLException
+    {
+        return r.isContainedIn(containingResource);
+    }
 
     /* ------------------------------------------------------------ */
     protected void finalize()
@@ -286,6 +289,9 @@ public abstract class Resource implements Serializable
         release();
     }
 
+    public abstract boolean isContainedIn (Resource r) throws MalformedURLException;
+    
+    
     /* ------------------------------------------------------------ */
     /** Release any resources held by the resource.
      */
@@ -592,4 +598,7 @@ public abstract class Resource implements Serializable
             in.close();
         }
     }    
+    
+    
+   
 }

jetty-util/src/main/java/org/eclipse/jetty/util/resource/ResourceCollection.java

@@ -439,4 +439,11 @@ public class ResourceCollection extends Resource
         return buffer.toString();
     }
 
+
+    public boolean isContainedIn(Resource r) throws MalformedURLException
+    {
+        // TODO could look at implementing the semantic of is this collection a subset of the Resource r?
+        return false;
+    }
+
 }

jetty-util/src/main/java/org/eclipse/jetty/util/resource/URLResource.java

@@ -289,4 +289,9 @@ public class URLResource extends Resource
     {
         return _useCaches;
     }
+    
+    public boolean isContainedIn (Resource containingResource) throws MalformedURLException
+    {
+        return false; //TODO gregw check this!
+    }
 }