Home | History | Annotate | Download | only in functions 
      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    */
     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    */
     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