add Pdh.getPerflibCounterMap()

bindings/java/src/org/hyperic/sigar/win32/Pdh.java

@@ -19,11 +19,16 @@
 package org.hyperic.sigar.win32;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Properties;
 
 public class Pdh extends Win32 {
 
+    public static final String PERFLIB_KEY =
+        "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib";
+
     private long   query = -1l; // Handle to the query
     private String hostname = null;
     private Properties names;
@@ -57,6 +62,52 @@ public class Pdh extends Win32 {
         }
     }
 
+    private static class PerflibCounterMap extends ArrayList {
+        private Map map = new HashMap();
+        private String index = null;
+
+        //called by RegistryKey.getMultiStringValue
+        //format description see: http://support.microsoft.com/kb/q287159/
+        public boolean add(Object o) {
+            if (index == null) {
+                index = (String)o;
+                return true;
+            }
+            //name -> index
+            this.map.put(o, index);
+            index = null; //reset
+            return true;
+        }
+    }
+
+    public static Map getEnglishPerflibCounterMap()
+        throws Win32Exception {
+
+        LocaleInfo locale =
+            new LocaleInfo(LocaleInfo.LANG_ENGLISH);
+
+        return getPerflibCounterMap(locale);
+    }
+
+    public static Map getPerflibCounterMap(LocaleInfo locale)
+        throws Win32Exception {
+
+        String path =
+            PERFLIB_KEY + "\\" + locale.getPerflibLangId();
+
+        RegistryKey key =
+            RegistryKey.LocalMachine.openSubKey(path);
+
+        PerflibCounterMap counters = new PerflibCounterMap();
+        try {
+            key.getMultiStringValue("Counter", counters);
+        } finally {
+            key.close();
+        }
+
+        return counters.map;
+    }
+
     /**
      * @deprecated
      * @see #getRawValue(String path)

bindings/java/src/org/hyperic/sigar/win32/test/TestPdh.java

@@ -18,6 +18,8 @@
 
 package org.hyperic.sigar.win32.test;
 
+import java.util.Map;
+
 import org.hyperic.sigar.test.SigarTestCase;
 import org.hyperic.sigar.win32.Pdh;
 
@@ -56,6 +58,23 @@ public class TestPdh extends SigarTestCase {
         */
     }
 
+    public void testCounterMap() throws Exception {
+        Map counters = Pdh.getEnglishPerflibCounterMap();
+
+        assertGtZeroTrace("counters", counters.size());
+
+        String[] keys = {
+            "System", "System Up Time"
+        };
+        String last = null;
+        for (int i=0; i<keys.length; i++) {
+            String index = (String)counters.get(keys[i]);
+            assertFalse(index.equals(last));
+            traceln(keys[i] + "=" + index);
+            last = index;
+        }
+    }
+
     public void testPdh() throws Exception {
 
         String[] iface = Pdh.getKeys("Thread");