From ffb9044301d1c169f934e0adf4f473e99da39a47 Mon Sep 17 00:00:00 2001
From: boli <boli@localhost>
Date: Mon, 27 Aug 2007 18:58:10 +0000
Subject: [PATCH] This adds the numSubordinates and hasSubordinates operational attribute support in OpenDS.    - Implemented as virtual attributes    - They are enabled by default    - numSubordinates and hasSubordinates methods added to the backend API and implemented for all existing backends    - JE implementation uses the id2children index to keep count of the number of subordinates for each entry.    - The behavior of exceeding the index-entry-limit (ALL-IDs) has changed to store a 8 byte entry ID set count with the most significant bit  set to 1 instead of a 0 byte array to signify the index-entry-limit has been exceeded. The previous format is still compatible but all requests  for numSubordinates will return undefined (-1).    - The DBTest tool is also included in this fix. This can be used to list root containers, entry containers, database containers, index  status, as well as dumping a database with or without decoding the data. 

---
 opends/src/server/org/opends/server/backends/MonitorBackend.java |   89 ++++++++++++++++++++++++++++++++++----------
 1 files changed, 69 insertions(+), 20 deletions(-)

diff --git a/opends/src/server/org/opends/server/backends/MonitorBackend.java b/opends/src/server/org/opends/server/backends/MonitorBackend.java
index 5d00097..8e55f48 100644
--- a/opends/src/server/org/opends/server/backends/MonitorBackend.java
+++ b/opends/src/server/org/opends/server/backends/MonitorBackend.java
@@ -48,25 +48,6 @@
 import org.opends.server.core.ModifyDNOperation;
 import org.opends.server.core.SearchOperation;
 import org.opends.server.protocols.asn1.ASN1OctetString;
-import org.opends.server.types.Attribute;
-import org.opends.server.types.AttributeType;
-import org.opends.server.types.AttributeValue;
-import org.opends.server.types.BackupConfig;
-import org.opends.server.types.BackupDirectory;
-import org.opends.server.types.ConfigChangeResult;
-import org.opends.server.types.DirectoryException;
-import org.opends.server.types.DN;
-import org.opends.server.types.Entry;
-import org.opends.server.types.InitializationException;
-import org.opends.server.types.LDIFExportConfig;
-import org.opends.server.types.LDIFImportConfig;
-import org.opends.server.types.LDIFImportResult;
-import org.opends.server.types.ObjectClass;
-import org.opends.server.types.RDN;
-import org.opends.server.types.RestoreConfig;
-import org.opends.server.types.ResultCode;
-import org.opends.server.types.SearchFilter;
-import org.opends.server.types.SearchScope;
 import org.opends.server.util.DynamicConstants;
 import org.opends.server.util.LDIFWriter;
 import org.opends.server.util.TimeThread;
@@ -75,7 +56,7 @@
 import static org.opends.server.config.ConfigConstants.*;
 import static org.opends.server.loggers.debug.DebugLogger.*;
 import org.opends.server.loggers.debug.DebugTracer;
-import org.opends.server.types.DebugLogLevel;
+import org.opends.server.types.*;
 import static org.opends.messages.BackendMessages.*;
 import static org.opends.messages.ConfigMessages.*;
 import static org.opends.server.util.ServerConstants.*;
@@ -355,7 +336,75 @@
     return true;
   }
 
+  /**
+   * {@inheritDoc}
+   */
+  public ConditionResult hasSubordinates(DN entryDN) throws DirectoryException
+  {
+    long ret = numSubordinates(entryDN);
+    if(ret < 0)
+    {
+      return ConditionResult.UNDEFINED;
+    }
+    else if(ret == 0)
+    {
+      return ConditionResult.FALSE;
+    }
+    else
+    {
+      return ConditionResult.TRUE;
+    }
+  }
 
+  /**
+   * {@inheritDoc}
+   */
+  public long numSubordinates(DN entryDN) throws DirectoryException
+  {
+    // If the requested entry was null, then return undefined.
+    if (entryDN == null)
+    {
+      return -1;
+    }
+
+
+    // If the requested entry was the monitor base entry, then return
+    // the number of monitor providers.
+    if (entryDN.equals(baseMonitorDN))
+    {
+      return DirectoryServer.getMonitorProviders().size();
+    }
+
+
+    // See if the monitor base entry is the immediate parent for the requested
+    // entry.  If not, then its undefined.
+    DN parentDN = entryDN.getParentDNInSuffix();
+    if ((parentDN == null) || (! parentDN.equals(baseMonitorDN)))
+    {
+      return -1;
+    }
+
+
+    // Get the RDN for the requested DN and make sure it is single-valued.
+    RDN entryRDN = entryDN.getRDN();
+    if (entryRDN.isMultiValued())
+    {
+      return -1;
+    }
+
+
+    // Get the RDN value and see if it matches the instance name for one of
+    // the directory server monitor providers.
+    String rdnValue = entryRDN.getAttributeValue(0).getStringValue();
+    MonitorProvider<? extends MonitorProviderCfg> monitorProvider =
+         DirectoryServer.getMonitorProvider(rdnValue.toLowerCase());
+    if (monitorProvider == null)
+    {
+      return -1;
+    }
+
+    return 0;
+  }
 
   /**
    * Retrieves the requested entry from this backend.

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