# HG changeset patch
# User aefimov
# Date 1477317749 -10800
# Node ID 35561b665acd1a34333144a6a5b30d577df0e9f5
# Parent  e114b1e35683a2d5c9a472a3391c69b9fcfc530d
8167179: Make XSL generated namespace prefixes local to transformation process
Reviewed-by: joehw

diff -r e114b1e35683 -r 35561b665acd src/com/sun/org/apache/xalan/internal/xsltc/compiler/Stylesheet.java
--- a/src/com/sun/org/apache/xalan/internal/xsltc/compiler/Stylesheet.java	Tue Feb 07 01:26:20 2017 +0000
+++ b/src/com/sun/org/apache/xalan/internal/xsltc/compiler/Stylesheet.java	Mon Oct 24 17:02:29 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
@@ -31,6 +31,7 @@
 import com.sun.org.apache.bcel.internal.generic.GETSTATIC;
 import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
 import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
+import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
 import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
 import com.sun.org.apache.bcel.internal.generic.ISTORE;
 import com.sun.org.apache.bcel.internal.generic.InstructionHandle;
@@ -1252,6 +1253,10 @@
                                 classGen.getConstantPool());
         transf.addException("com.sun.org.apache.xalan.internal.xsltc.TransletException");
 
+        // call resetPrefixIndex at the beginning of transform
+        final int check = cpg.addMethodref(BASIS_LIBRARY_CLASS, "resetPrefixIndex", "()V");
+        il.append(new INVOKESTATIC(check));
+
         // Define and initialize current with the root node
         final LocalVariableGen current =
             transf.addLocalVariable("current",
diff -r e114b1e35683 -r 35561b665acd src/com/sun/org/apache/xalan/internal/xsltc/runtime/BasisLibrary.java
--- a/src/com/sun/org/apache/xalan/internal/xsltc/runtime/BasisLibrary.java	Tue Feb 07 01:26:20 2017 +0000
+++ b/src/com/sun/org/apache/xalan/internal/xsltc/runtime/BasisLibrary.java	Mon Oct 24 17:02:29 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
@@ -48,6 +48,7 @@
 import java.text.NumberFormat;
 import java.util.Locale;
 import java.util.ResourceBundle;
+import java.util.concurrent.atomic.AtomicInteger;
 import javax.xml.transform.dom.DOMSource;
 import org.w3c.dom.Attr;
 import org.w3c.dom.Document;
@@ -1530,16 +1531,25 @@
     }
 
     /**
-     * This function is used in the execution of xsl:element
+     * These functions are used in the execution of xsl:element to generate
+     * and reset namespace prefix index local to current transformation process
      */
-    private static int prefixIndex = 0;
-
     public static String generatePrefix() {
-        synchronized (BasisLibrary.class) {
-            return ("ns" + prefixIndex++);
-        }
+        return ("ns" + threadLocalPrefixIndex.get().getAndIncrement());
+    }
+
+    public static void resetPrefixIndex() {
+        threadLocalPrefixIndex.get().set(0);
     }
 
+    private static final ThreadLocal<AtomicInteger> threadLocalPrefixIndex =
+        new ThreadLocal<AtomicInteger>() {
+            @Override
+            protected AtomicInteger initialValue() {
+                return new AtomicInteger();
+            }
+        };
+
     public static final String RUN_TIME_INTERNAL_ERR =
                                            "RUN_TIME_INTERNAL_ERR";
     public static final String RUN_TIME_COPY_ERR =