//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package ognl;

import java.lang.reflect.Method;

/**
 * Superclass for OGNL exceptions, incorporating an optional encapsulated exception.
 *
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
public class OgnlException extends Exception
{
    // cache initCause method - if available..to be used during throwable constructor
    // to properly setup superclass.

    static Method _initCause;
    static {
        try {
            _initCause = OgnlException.class.getMethod("initCause", new Class[] { Throwable.class});
        } catch (NoSuchMethodException e) { /** ignore */ }
    }

    /**
     * The root evaluation of the expression when the exception was thrown
     */
    private Evaluation _evaluation;

    /**
     * Why this exception was thrown.
     * @serial
     */
    private Throwable _reason;

    /** Constructs an OgnlException with no message or encapsulated exception. */
    public OgnlException()
    {
        this( null, null );
    }

    /**
     * Constructs an OgnlException with the given message but no encapsulated exception.
     * @param msg the exception's detail message
     */
    public OgnlException( String msg )
    {
        this( msg, null );
    }

    /**
     * Constructs an OgnlException with the given message and encapsulated exception.
     * @param msg     the exception's detail message
     * @param reason  the encapsulated exception
     */
    public OgnlException( String msg, Throwable reason )
    {
        super( msg );
        this._reason = reason;

        if (_initCause != null)
        {
            try {
                _initCause.invoke(this, new Object[] { reason });
            } catch (Exception t) { /** ignore */ }
        }
    }

    /**
     * Returns the encapsulated exception, or null if there is none.
     * @return the encapsulated exception
     */
    public Throwable getReason()
    {
        return _reason;
    }

    /**
     * Returns the Evaluation that was the root evaluation when the exception was
     * thrown.
     * @return The {@link Evaluation}.
     */
    public Evaluation getEvaluation()
    {
        return _evaluation;
    }

    /**
     * Sets the Evaluation that was current when this exception was thrown.
     *
     * @param value The {@link Evaluation}.
     */
    public void setEvaluation(Evaluation value)
    {
        _evaluation = value;
    }

    /**
     * Returns a string representation of this exception.
     * @return a string representation of this exception
     */
    public String toString()
    {
        if ( _reason == null )
            return super.toString();

        return super.toString() + " [" + _reason + "]";
    }

    /**
     * Prints the stack trace for this (and possibly the encapsulated) exception on
     * System.err.
     */
    public void printStackTrace()
    {
        printStackTrace( System.err );
    }

    /**
     * Prints the stack trace for this (and possibly the encapsulated) exception on the
     * given print stream.
     */
    public void printStackTrace(java.io.PrintStream s)
    {
        synchronized (s)
        {
            super.printStackTrace(s);
            if ( _reason != null ) {
                s.println(  "/-- Encapsulated exception ------------\\" );
                _reason.printStackTrace(s);
                s.println( "\\--------------------------------------/" );
            }
        }
    }

    /**
     * Prints the stack trace for this (and possibly the encapsulated) exception on the
     * given print writer.
     */
    public void printStackTrace(java.io.PrintWriter s)
    {
        synchronized (s)
        {
            super.printStackTrace(s);
            if ( _reason != null ) {
                s.println(  "/-- Encapsulated exception ------------\\" );
                _reason.printStackTrace(s);
                s.println( "\\--------------------------------------/" );
            }
        }
    }
}


//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package ognl;

import java.util.*;

/**
 * Implementation of NullHandler that returns null in all cases,
 * so that NullPointerException will be thrown by the caller.
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
public class ObjectNullHandler implements NullHandler
{
    /* NullHandler interface */
    public Object nullMethodResult(Map context, Object target, String methodName, Object[] args)
    {
        return null;
    }

    public Object nullPropertyValue(Map context, Object target, Object property)
    {
        return null;
    }
}


/* Generated By:JavaCC: Do not edit this line. JavaCharStream.java Version 4.1 */
/* JavaCCOptions:STATIC=false */
package ognl;

/**
 * An implementation of interface CharStream, where the stream is assumed to
 * contain only ASCII characters (with java-like unicode escape processing).
 */

public class JavaCharStream
{
/** Whether parser is static. */
  public static final boolean staticFlag = false;
  static final int hexval(char c) throws java.io.IOException {
    switch(c)
    {
       case '0' :
          return 0;
       case '1' :
          return 1;
       case '2' :
          return 2;
       case '3' :
          return 3;
       case '4' :
          return 4;
       case '5' :
          return 5;
       case '6' :
          return 6;
       case '7' :
          return 7;
       case '8' :
          return 8;
       case '9' :
          return 9;

       case 'a' :
       case 'A' :
          return 10;
       case 'b' :
       case 'B' :
          return 11;
       case 'c' :
       case 'C' :
          return 12;
       case 'd' :
       case 'D' :
          return 13;
       case 'e' :
       case 'E' :
          return 14;
       case 'f' :
       case 'F' :
          return 15;
    }

    throw new java.io.IOException(); // Should never come here
  }

/** Position in buffer. */
  public int bufpos = -1;
  int bufsize;
  int available;
  int tokenBegin;
  protected int bufline[];
  protected int bufcolumn[];

  protected int column = 0;
  protected int line = 1;

  protected boolean prevCharIsCR = false;
  protected boolean prevCharIsLF = false;

  protected java.io.Reader inputStream;

  protected char[] nextCharBuf;
  protected char[] buffer;
  protected int maxNextCharInd = 0;
  protected int nextCharInd = -1;
  protected int inBuf = 0;
  protected int tabSize = 8;

  protected void setTabSize(int i) { tabSize = i; }
  protected int getTabSize(int i) { return tabSize; }

  protected void ExpandBuff(boolean wrapAround)
  {
     char[] newbuffer = new char[bufsize + 2048];
     int newbufline[] = new int[bufsize + 2048];
     int newbufcolumn[] = new int[bufsize + 2048];

     try
     {
        if (wrapAround)
        {
           System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
           System.arraycopy(buffer, 0, newbuffer,
                                             bufsize - tokenBegin, bufpos);
           buffer = newbuffer;

           System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
           System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
           bufline = newbufline;

           System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
           System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
           bufcolumn = newbufcolumn;

           bufpos += (bufsize - tokenBegin);
        }
        else
        {
           System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
           buffer = newbuffer;

           System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
           bufline = newbufline;

           System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
           bufcolumn = newbufcolumn;

           bufpos -= tokenBegin;
        }
     }
     catch (Throwable t)
     {
        throw new Error(t.getMessage());
     }

     available = (bufsize += 2048);
     tokenBegin = 0;
  }

  protected void FillBuff() throws java.io.IOException
  {
     int i;
     if (maxNextCharInd == 4096)
        maxNextCharInd = nextCharInd = 0;

     try {
        if ((i = inputStream.read(nextCharBuf, maxNextCharInd,
                                            4096 - maxNextCharInd)) == -1)
        {
           inputStream.close();
           throw new java.io.IOException();
        }
        else
           maxNextCharInd += i;
        return;
     }
     catch(java.io.IOException e) {
        if (bufpos != 0)
        {
           --bufpos;
           backup(0);
        }
        else
        {
           bufline[bufpos] = line;
           bufcolumn[bufpos] = column;
        }
        throw e;
     }
  }

  protected char ReadByte() throws java.io.IOException
  {
     if (++nextCharInd >= maxNextCharInd)
        FillBuff();

     return nextCharBuf[nextCharInd];
  }

/** @return starting character for token. */
  public char BeginToken() throws java.io.IOException
  {
     if (inBuf > 0)
     {
        --inBuf;

        if (++bufpos == bufsize)
           bufpos = 0;

        tokenBegin = bufpos;
        return buffer[bufpos];
     }

     tokenBegin = 0;
     bufpos = -1;

     return readChar();
  }

  protected void AdjustBuffSize()
  {
     if (available == bufsize)
     {
        if (tokenBegin > 2048)
        {
           bufpos = 0;
           available = tokenBegin;
        }
        else
           ExpandBuff(false);
     }
     else if (available > tokenBegin)
        available = bufsize;
     else if ((tokenBegin - available) < 2048)
        ExpandBuff(true);
     else
        available = tokenBegin;
  }

  protected void UpdateLineColumn(char c)
  {
     column++;

     if (prevCharIsLF)
     {
        prevCharIsLF = false;
        line += (column = 1);
     }
     else if (prevCharIsCR)
     {
        prevCharIsCR = false;
        if (c == '\n')
        {
           prevCharIsLF = true;
        }
        else
           line += (column = 1);
     }

     switch (c)
     {
        case '\r' :
           prevCharIsCR = true;
           break;
        case '\n' :
           prevCharIsLF = true;
           break;
        case '\t' :
           column--;
           column += (tabSize - (column % tabSize));
           break;
        default :
           break;
     }

     bufline[bufpos] = line;
     bufcolumn[bufpos] = column;
  }

/** Read a character. */
  public char readChar() throws java.io.IOException
  {
     if (inBuf > 0)
     {
        --inBuf;

        if (++bufpos == bufsize)
           bufpos = 0;

        return buffer[bufpos];
     }

     char c;

     if (++bufpos == available)
        AdjustBuffSize();

     if ((buffer[bufpos] = c = ReadByte()) == '\\')
     {
        UpdateLineColumn(c);

        int backSlashCnt = 1;

        for (;;) // Read all the backslashes
        {
           if (++bufpos == available)
              AdjustBuffSize();

           try
           {
              if ((buffer[bufpos] = c = ReadByte()) != '\\')
              {
                 UpdateLineColumn(c);
                 // found a non-backslash char.
                 if ((c == 'u') && ((backSlashCnt & 1) == 1))
                 {
                    if (--bufpos < 0)
                       bufpos = bufsize - 1;

                    break;
                 }

                 backup(backSlashCnt);
                 return '\\';
              }
           }
           catch(java.io.IOException e)
           {
              if (backSlashCnt > 1)
                 backup(backSlashCnt-1);

              return '\\';
           }

           UpdateLineColumn(c);
           backSlashCnt++;
        }

        // Here, we have seen an odd number of backslash's followed by a 'u'
        try
        {
           while ((c = ReadByte()) == 'u')
              ++column;

           buffer[bufpos] = c = (char)(hexval(c) << 12 |
                                       hexval(ReadByte()) << 8 |
                                       hexval(ReadByte()) << 4 |
                                       hexval(ReadByte()));

           column += 4;
        }
        catch(java.io.IOException e)
        {
           throw new Error("Invalid escape character at line " + line +
                                         " column " + column + ".");
        }

        if (backSlashCnt == 1)
           return c;
        else
        {
           backup(backSlashCnt - 1);
           return '\\';
        }
     }
     else
     {
        UpdateLineColumn(c);
        return c;
     }
  }

  /**
   * @deprecated
   * @see #getEndColumn
   */
  public int getColumn() {
     return bufcolumn[bufpos];
  }

  /**
   * @deprecated
   * @see #getEndLine
   */
  public int getLine() {
     return bufline[bufpos];
  }

/** Get end column. */
  public int getEndColumn() {
     return bufcolumn[bufpos];
  }

/** Get end line. */
  public int getEndLine() {
     return bufline[bufpos];
  }

/** @return column of token start */
  public int getBeginColumn() {
     return bufcolumn[tokenBegin];
  }

/** @return line number of token start */
  public int getBeginLine() {
     return bufline[tokenBegin];
  }

/** Retreat. */
  public void backup(int amount) {

    inBuf += amount;
    if ((bufpos -= amount) < 0)
       bufpos += bufsize;
  }

/** Constructor. */
  public JavaCharStream(java.io.Reader dstream,
                 int startline, int startcolumn, int buffersize)
  {
    inputStream = dstream;
    line = startline;
    column = startcolumn - 1;

    available = bufsize = buffersize;
    buffer = new char[buffersize];
    bufline = new int[buffersize];
    bufcolumn = new int[buffersize];
    nextCharBuf = new char[4096];
  }

/** Constructor. */
  public JavaCharStream(java.io.Reader dstream,
                                        int startline, int startcolumn)
  {
     this(dstream, startline, startcolumn, 4096);
  }

/** Constructor. */
  public JavaCharStream(java.io.Reader dstream)
  {
     this(dstream, 1, 1, 4096);
  }
/** Reinitialise. */
  public void ReInit(java.io.Reader dstream,
                 int startline, int startcolumn, int buffersize)
  {
    inputStream = dstream;
    line = startline;
    column = startcolumn - 1;

    if (buffer == null || buffersize != buffer.length)
    {
      available = bufsize = buffersize;
      buffer = new char[buffersize];
      bufline = new int[buffersize];
      bufcolumn = new int[buffersize];
      nextCharBuf = new char[4096];
    }
    prevCharIsLF = prevCharIsCR = false;
    tokenBegin = inBuf = maxNextCharInd = 0;
    nextCharInd = bufpos = -1;
  }

/** Reinitialise. */
  public void ReInit(java.io.Reader dstream,
                                        int startline, int startcolumn)
  {
     ReInit(dstream, startline, startcolumn, 4096);
  }

/** Reinitialise. */
  public void ReInit(java.io.Reader dstream)
  {
     ReInit(dstream, 1, 1, 4096);
  }
/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream, String encoding, int startline,
  int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
  {
     this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
  }

/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream, int startline,
  int startcolumn, int buffersize)
  {
     this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
  }

/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream, String encoding, int startline,
                        int startcolumn) throws java.io.UnsupportedEncodingException
  {
     this(dstream, encoding, startline, startcolumn, 4096);
  }

/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream, int startline,
                        int startcolumn)
  {
     this(dstream, startline, startcolumn, 4096);
  }

/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
  {
     this(dstream, encoding, 1, 1, 4096);
  }

/** Constructor. */
  public JavaCharStream(java.io.InputStream dstream)
  {
     this(dstream, 1, 1, 4096);
  }

/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream, String encoding, int startline,
  int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
  {
     ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
  }

/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream, int startline,
  int startcolumn, int buffersize)
  {
     ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);
  }
/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream, String encoding, int startline,
                     int startcolumn) throws java.io.UnsupportedEncodingException
  {
     ReInit(dstream, encoding, startline, startcolumn, 4096);
  }
/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream, int startline,
                     int startcolumn)
  {
     ReInit(dstream, startline, startcolumn, 4096);
  }
/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
  {
     ReInit(dstream, encoding, 1, 1, 4096);
  }

/** Reinitialise. */
  public void ReInit(java.io.InputStream dstream)
  {
     ReInit(dstream, 1, 1, 4096);
  }

  /** @return token image as String */
  public String GetImage()
  {
     if (bufpos >= tokenBegin)
        return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
     else
        return new String(buffer, tokenBegin, bufsize - tokenBegin) +
                              new String(buffer, 0, bufpos + 1);
  }

  /** @return suffix */
  public char[] GetSuffix(int len)
  {
     char[] ret = new char[len];

     if ((bufpos + 1) >= len)
        System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
     else
     {
        System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
                                                          len - bufpos - 1);
        System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
     }

     return ret;
  }

  /** Set buffers back to null when finished. */
  public void Done()
  {
     nextCharBuf = null;
     buffer = null;
     bufline = null;
     bufcolumn = null;
  }

  /**
   * Method to adjust line and column numbers for the start of a token.
   */
  public void adjustBeginLineColumn(int newLine, int newCol)
  {
     int start = tokenBegin;
     int len;

     if (bufpos >= tokenBegin)
     {
        len = bufpos - tokenBegin + inBuf + 1;
     }
     else
     {
        len = bufsize - tokenBegin + bufpos + 1 + inBuf;
     }

     int i = 0, j = 0, k = 0;
     int nextColDiff = 0, columnDiff = 0;

     while (i < len &&
            bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
     {
        bufline[j] = newLine;
        nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
        bufcolumn[j] = newCol + columnDiff;
        columnDiff = nextColDiff;
        i++;
     }

     if (i < len)
     {
        bufline[j] = newLine++;
        bufcolumn[j] = newCol + columnDiff;

        while (i++ < len)
        {
           if (bufline[j = start % bufsize] != bufline[++start % bufsize])
              bufline[j] = newLine++;
           else
              bufline[j] = newLine;
        }
     }

     line = bufline[j];
     column = bufcolumn[j];
  }

}
/* JavaCC - OriginalChecksum=7ef64849e2b59fe6d1ffdca3bf0ddd2b (do not edit this line) */