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: AVTPartSimple.java 468643 2006-10-28 06:56:03Z minchau $
020     */
021    package org.apache.xalan.templates;
022    
023    import org.apache.xml.utils.FastStringBuffer;
024    import org.apache.xpath.XPathContext;
025    
026    /**
027     * Simple string part of a complex AVT.
028     * @xsl.usage internal
029     */
030    public class AVTPartSimple extends AVTPart
031    {
032        static final long serialVersionUID = -3744957690598727913L;
033    
034      /**
035       * Simple string value;
036       * @serial
037       */
038      private String m_val;
039    
040      /**
041       * Construct a simple AVT part.
042       * @param val A pure string section of an AVT.
043       */
044      public AVTPartSimple(String val)
045      {
046        m_val = val;
047      }
048    
049      /**
050       * Get the AVT part as the original string.
051       *
052       * @return the AVT part as the original string.
053       */
054      public String getSimpleString()
055      {
056        return m_val;
057      }
058      
059      /**
060       * This function is used to fixup variables from QNames to stack frame 
061       * indexes at stylesheet build time.
062       * @param vars List of QNames that correspond to variables.  This list 
063       * should be searched backwards for the first qualified name that 
064       * corresponds to the variable reference qname.  The position of the 
065       * QName in the vector from the start of the vector will be its position 
066       * in the stack frame (but variables above the globalsTop value will need 
067       * to be offset to the current stack frame).
068       */
069      public void fixupVariables(java.util.Vector vars, int globalsSize)
070      {
071        // no-op
072      }
073    
074    
075      /**
076       * Write the value into the buffer.
077       *
078       * @param xctxt An XPathContext object, providing infomation specific
079       * to this invocation and this thread. Maintains SAX state, variables, 
080       * error handler and  so on, so the transformation/XPath object itself
081       * can be simultaneously invoked from multiple threads.
082       * @param buf Buffer to write into.
083       * @param context The current source tree context.
084       * @param nsNode The current namespace context (stylesheet tree context).
085       */
086      public void evaluate(XPathContext xctxt, FastStringBuffer buf,
087                           int context,
088                           org.apache.xml.utils.PrefixResolver nsNode)
089      {
090        buf.append(m_val);
091      }
092      /**
093       * @see XSLTVisitable#callVisitors(XSLTVisitor)
094       */
095      public void callVisitors(XSLTVisitor visitor)
096      {
097            // Don't do anything for the subpart for right now.
098      }
099    
100    }