--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/share/classes/com/sun/org/apache/xpath/internal/functions/FuncSum.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.
+ */
+/*
+ * $Id: FuncSum.java,v 1.2.4.1 2005/09/14 20:18:46 jeffsuttor Exp $
+ */
+package com.sun.org.apache.xpath.internal.functions;
+
+import com.sun.org.apache.xml.internal.dtm.DTM;
+import com.sun.org.apache.xml.internal.dtm.DTMIterator;
+import com.sun.org.apache.xml.internal.utils.XMLString;
+import com.sun.org.apache.xpath.internal.XPathContext;
+import com.sun.org.apache.xpath.internal.objects.XNumber;
+import com.sun.org.apache.xpath.internal.objects.XObject;
+
+/**
+ * Execute the Sum() function.
+ * @xsl.usage advanced
+ */
+public class FuncSum extends FunctionOneArg
+{
+    static final long serialVersionUID = -2719049259574677519L;
+
+  /**
+   * Execute the function.  The function must return
+   * a valid object.
+   * @param xctxt The current execution context.
+   * @return A valid XObject.
+   *
+   * @throws javax.xml.transform.TransformerException
+   */
+  public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
+  {
+
+    DTMIterator nodes = m_arg0.asIterator(xctxt, xctxt.getCurrentNode());
+    double sum = 0.0;
+    int pos;
+
+    while (DTM.NULL != (pos = nodes.nextNode()))
+    {
+      DTM dtm = nodes.getDTM(pos);
+      XMLString s = dtm.getStringValue(pos);
+
+      if (null != s)
+        sum += s.toDouble();
+    }
+    nodes.detach();
+
+    return new XNumber(sum);
+  }
+}