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      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: AVTPartSimple.java 468643 2006-10-28 06:56:03Z minchau $
     20  */
     21 package org.apache.xalan.templates;
     22 
     23 import org.apache.xml.utils.FastStringBuffer;
     24 import org.apache.xpath.XPathContext;
     25 
     26 /**
     27  * Simple string part of a complex AVT.
     28  * @xsl.usage internal
     29  */
     30 public class AVTPartSimple extends AVTPart
     31 {
     32     static final long serialVersionUID = -3744957690598727913L;
     33 
     34   /**
     35    * Simple string value;
     36    * @serial
     37    */
     38   private String m_val;
     39 
     40   /**
     41    * Construct a simple AVT part.
     42    * @param val A pure string section of an AVT.
     43    */
     44   public AVTPartSimple(String val)
     45   {
     46     m_val = val;
     47   }
     48 
     49   /**
     50    * Get the AVT part as the original string.
     51    *
     52    * @return the AVT part as the original string.
     53    */
     54   public String getSimpleString()
     55   {
     56     return m_val;
     57   }
     58 
     59   /**
     60    * This function is used to fixup variables from QNames to stack frame
     61    * indexes at stylesheet build time.
     62    * @param vars List of QNames that correspond to variables.  This list
     63    * should be searched backwards for the first qualified name that
     64    * corresponds to the variable reference qname.  The position of the
     65    * QName in the vector from the start of the vector will be its position
     66    * in the stack frame (but variables above the globalsTop value will need
     67    * to be offset to the current stack frame).
     68    */
     69   public void fixupVariables(java.util.Vector vars, int globalsSize)
     70   {
     71     // no-op
     72   }
     73 
     74 
     75   /**
     76    * Write the value into the buffer.
     77    *
     78    * @param xctxt An XPathContext object, providing infomation specific
     79    * to this invocation and this thread. Maintains SAX state, variables,
     80    * error handler and  so on, so the transformation/XPath object itself
     81    * can be simultaneously invoked from multiple threads.
     82    * @param buf Buffer to write into.
     83    * @param context The current source tree context.
     84    * @param nsNode The current namespace context (stylesheet tree context).
     85    */
     86   public void evaluate(XPathContext xctxt, FastStringBuffer buf,
     87                        int context,
     88                        org.apache.xml.utils.PrefixResolver nsNode)
     89   {
     90     buf.append(m_val);
     91   }
     92   /**
     93    * @see XSLTVisitable#callVisitors(XSLTVisitor)
     94    */
     95   public void callVisitors(XSLTVisitor visitor)
     96   {
     97   	// Don't do anything for the subpart for right now.
     98   }
     99 
    100 }
    101