1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements. See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership. The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the  "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 /*
19  * $Id: FuncNormalizeSpace.java 468655 2006-10-28 07:12:06Z minchau $
20  */
21 package org.apache.xpath.functions;
22 
23 import org.apache.xml.dtm.DTM;
24 import org.apache.xml.utils.XMLString;
25 import org.apache.xpath.XPathContext;
26 import org.apache.xpath.objects.XObject;
27 import org.apache.xpath.objects.XString;
28 import org.xml.sax.ContentHandler;
29 
30 /**
31  * Execute the normalize-space() function.
32  * @xsl.usage advanced
33  */
34 public class FuncNormalizeSpace extends FunctionDef1Arg
35 {
36     static final long serialVersionUID = -3377956872032190880L;
37 
38   /**
39    * Execute the function.  The function must return
40    * a valid object.
41    * @param xctxt The current execution context.
42    * @return A valid XObject.
43    *
44    * @throws javax.xml.transform.TransformerException
45    */
execute(XPathContext xctxt)46   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
47   {
48     XMLString s1 = getArg0AsString(xctxt);
49 
50     return (XString)s1.fixWhiteSpace(true, true, false);
51   }
52 
53   /**
54    * Execute an expression in the XPath runtime context, and return the
55    * result of the expression.
56    *
57    *
58    * @param xctxt The XPath runtime context.
59    *
60    * @return The result of the expression in the form of a <code>XObject</code>.
61    *
62    * @throws javax.xml.transform.TransformerException if a runtime exception
63    *         occurs.
64    */
executeCharsToContentHandler(XPathContext xctxt, ContentHandler handler)65   public void executeCharsToContentHandler(XPathContext xctxt,
66                                               ContentHandler handler)
67     throws javax.xml.transform.TransformerException,
68            org.xml.sax.SAXException
69   {
70     if(Arg0IsNodesetExpr())
71     {
72       int node = getArg0AsNode(xctxt);
73       if(DTM.NULL != node)
74       {
75         DTM dtm = xctxt.getDTM(node);
76         dtm.dispatchCharactersEvents(node, handler, true);
77       }
78     }
79     else
80     {
81       XObject obj = execute(xctxt);
82       obj.dispatchCharactersEvents(handler);
83     }
84   }
85 
86 }
87