001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: FuncNormalizeSpace.java 468655 2006-10-28 07:12:06Z minchau $
020 */
021 package org.apache.xpath.functions;
022
023 import org.apache.xml.dtm.DTM;
024 import org.apache.xml.utils.XMLString;
025 import org.apache.xpath.XPathContext;
026 import org.apache.xpath.objects.XObject;
027 import org.apache.xpath.objects.XString;
028 import org.xml.sax.ContentHandler;
029
030 /**
031 * Execute the normalize-space() function.
032 * @xsl.usage advanced
033 */
034 public class FuncNormalizeSpace extends FunctionDef1Arg
035 {
036 static final long serialVersionUID = -3377956872032190880L;
037
038 /**
039 * Execute the function. The function must return
040 * a valid object.
041 * @param xctxt The current execution context.
042 * @return A valid XObject.
043 *
044 * @throws javax.xml.transform.TransformerException
045 */
046 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
047 {
048 XMLString s1 = getArg0AsString(xctxt);
049
050 return (XString)s1.fixWhiteSpace(true, true, false);
051 }
052
053 /**
054 * Execute an expression in the XPath runtime context, and return the
055 * result of the expression.
056 *
057 *
058 * @param xctxt The XPath runtime context.
059 *
060 * @return The result of the expression in the form of a <code>XObject</code>.
061 *
062 * @throws javax.xml.transform.TransformerException if a runtime exception
063 * occurs.
064 */
065 public void executeCharsToContentHandler(XPathContext xctxt,
066 ContentHandler handler)
067 throws javax.xml.transform.TransformerException,
068 org.xml.sax.SAXException
069 {
070 if(Arg0IsNodesetExpr())
071 {
072 int node = getArg0AsNode(xctxt);
073 if(DTM.NULL != node)
074 {
075 DTM dtm = xctxt.getDTM(node);
076 dtm.dispatchCharactersEvents(node, handler, true);
077 }
078 }
079 else
080 {
081 XObject obj = execute(xctxt);
082 obj.dispatchCharactersEvents(handler);
083 }
084 }
085
086 }