--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/org/apache/xml/internal/security/utils/CachedXPathAPIHolder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,67 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright  1999-2004 The Apache Software Foundation.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package com.sun.org.apache.xml.internal.security.utils;
+
+import com.sun.org.apache.xpath.internal.CachedXPathAPI;
+import org.w3c.dom.Document;
+
+
+/**
+ * @author Raul Benito
+ */
+public class CachedXPathAPIHolder {
+         static java.util.logging.Logger log =
+                java.util.logging.Logger.getLogger(CachedXPathAPIHolder.class.getName());
+
+    static ThreadLocal  local=new ThreadLocal();
+    static ThreadLocal localDoc=new ThreadLocal();
+
+        /**
+         * Sets the doc for the xpath transformation. Resets the cache if needed
+         * @param doc
+         */
+        public static void setDoc(Document doc) {
+       if (localDoc.get()!=doc) {
+            CachedXPathAPI cx=(CachedXPathAPI)local.get();
+            if (cx==null) {
+               cx=new CachedXPathAPI();
+               local.set(cx);
+               localDoc.set(doc);
+               return;
+            }
+            //Different docs reset.
+            cx.getXPathContext().reset();
+            localDoc.set(doc);
+        }
+        }
+    /**
+     * @return the cachexpathapi for this thread
+     */
+    public static CachedXPathAPI getCachedXPathAPI() {
+        CachedXPathAPI cx=(CachedXPathAPI)local.get();
+        if (cx==null) {
+            cx=new CachedXPathAPI();
+            local.set(cx);
+            localDoc.set(null);
+        }
+        return cx;
+    }
+}