- /*
- * 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 1.10 2004/02/17 04:34:01 minchau 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
- {
-
- /**
- * 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);
- }
- }