| /* |
| * 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); |
| } |
| } |