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From elecha...@apache.org
Subject svn commit: r1051869 - in /directory/shared/branches/shared-AP/ldap/src: main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java
Date Wed, 22 Dec 2010 12:19:12 GMT
Author: elecharny
Date: Wed Dec 22 12:19:11 2010
New Revision: 1051869

URL: http://svn.apache.org/viewvc?rev=1051869&view=rev
Log:
Added a method and a test to get the closest parent in a DnNode which has an element from
a starting point.

Modified:
    directory/shared/branches/shared-AP/ldap/src/main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java
    directory/shared/branches/shared-AP/ldap/src/test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java

Modified: directory/shared/branches/shared-AP/ldap/src/main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java
URL: http://svn.apache.org/viewvc/directory/shared/branches/shared-AP/ldap/src/main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java?rev=1051869&r1=1051868&r2=1051869&view=diff
==============================================================================
--- directory/shared/branches/shared-AP/ldap/src/main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java
(original)
+++ directory/shared/branches/shared-AP/ldap/src/main/java/org/apache/directory/shared/ldap/util/tree/DnNode.java
Wed Dec 22 12:19:11 2010
@@ -780,6 +780,59 @@ public class DnNode<N> implements Clonea
         return hasElement;
     }
 
+
+    /**
+     * Get the closest Node for a given DN which has an element, if present in the tree.<br>
+     * For instance, if we have stored dc=acme, dc=org into the tree,
+     * the DN: ou=example, dc=acme, dc=org will have a parent, and
+     * dc=acme, dc=org will be returned if it has an associated element.
+     * <br>For the DN ou=apache, dc=org, there is no parent, so null will be returned.
+     *
+     * @param dn the normalized distinguished name to resolve to a parent
+     * @return the Node associated with the normalized dn
+     */
+    public DN getParentWithElement( DN dn )
+    {
+        List<RDN> rdns = dn.getRdns();
+
+        DnNode<N> currentNode = this;
+        int pos = 0;
+
+        // Iterate through all the RDN until we find the associated partition
+        for ( int i = rdns.size() - 1; i >= 1; i-- )
+        {
+            RDN rdn = rdns.get( i );
+
+            if ( currentNode.hasChildren() )
+            {
+                currentNode = currentNode.children.get( rdn );
+
+                if ( currentNode == null )
+                {
+                    break;
+                }
+
+                if ( currentNode.hasElement() )
+                {
+                    pos = i;
+                }
+
+                parent = currentNode;
+            }
+            else
+            {
+                break;
+            }
+        }
+
+        if ( pos == 0 )
+        {
+            return DN.EMPTY_DN;
+        }
+        
+        return dn.getPrefix( dn.size() - pos );
+    }
+
     
     /**
      * {@inheritDoc}

Modified: directory/shared/branches/shared-AP/ldap/src/test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java
URL: http://svn.apache.org/viewvc/directory/shared/branches/shared-AP/ldap/src/test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java?rev=1051869&r1=1051868&r2=1051869&view=diff
==============================================================================
--- directory/shared/branches/shared-AP/ldap/src/test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java
(original)
+++ directory/shared/branches/shared-AP/ldap/src/test/java/org/apache/directory/shared/ldap/util/tree/TestDnNode.java
Wed Dec 22 12:19:11 2010
@@ -802,4 +802,40 @@ public class TestDnNode
         dns = dnLookupTree.getDescendantElements( dn6 );
         assertEquals( 0, dns.size() );
     }
+    
+    
+    //---------------------------------------------------------------------------
+    // Test the getParentElement(DN) method
+    //---------------------------------------------------------------------------
+    @Test
+    public void testGetParentElement() throws Exception
+    {
+        DnNode<DN> dnLookupTree = new DnNode<DN>();
+        DN dn1 = new DN( "dc=directory,dc=apache,dc=org" );
+        DN dn2 = new DN( "dc=mina,dc=apache,dc=org" );
+        DN dn3 = new DN( "dc=test,dc=com" );
+        DN dn4 = new DN( "dc=acme,dc=com" );
+        DN dn5 = new DN( "dc=acme,c=us,dc=com" );
+        DN dn6 = new DN( "dc=empty" );
+        
+        DN org = new DN( "dc=org" );
+        DN apache =  new DN( "dc=apache,dc=org" );
+        DN test =  new DN( "dc=test,dc=directory,dc=apache,dc=org" );
+    
+        dnLookupTree.add( dn1, dn1 );
+        dnLookupTree.add( dn2, dn2 );
+        dnLookupTree.add( dn3, dn3 );
+        dnLookupTree.add( dn4, dn4 );
+        dnLookupTree.add( dn5 );
+        dnLookupTree.add( dn6, dn6 );
+        
+        // Inject some intermediary nodes
+        dnLookupTree.add( org, org );
+        
+        assertTrue( dnLookupTree.hasParentElement( apache ) );
+        assertEquals( org, dnLookupTree.getParentWithElement( dn1 ) );
+        assertEquals( org, dnLookupTree.getParentWithElement( apache ) );
+        assertEquals( dn1, dnLookupTree.getParentWithElement( test ) );
+        assertEquals( DN.EMPTY_DN, dnLookupTree.getParentWithElement( org ) );
+    }
 }



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