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The core parser functionality. This may be all you need.

There is a newer version: 3.26.2

/* Generated by: ParserGeneratorCC: Do not edit this line. StringProvider.java Version 1.1 */
/* ParserGeneratorCCOptions:KEEP_LINE_COLUMN=true */
/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2023 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */
package com.github.javaparser;

  
import java.io.IOException;
  
public class StringProvider implements Provider
{
  private String m_sStr;
  private int m_nPos = 0;
  private final int m_nLen;
  
  public StringProvider(final String sStr)
  {
    m_sStr = sStr;
    m_nLen = sStr.length();
  }
  
  public int read (final char[] aDest, final int nOfs, final int nLen) throws IOException
  {
    final int nLeft = m_nLen - m_nPos;
    if (nLeft <= 0)
      return -1;
    
    int nCharsRead = aDest.length - nOfs;
    if (nLen < nCharsRead)
      nCharsRead = nLen;
    if (nLeft < nCharsRead)
      nCharsRead = nLeft;
    
    m_sStr.getChars(m_nPos, m_nPos + nCharsRead, aDest, nOfs);
    m_nPos += nCharsRead;
    
    return nCharsRead;
  }

  public void close()
  {
    m_sStr = null;
  }
}
/* ParserGeneratorCC - OriginalChecksum=56b8d75f48c4e7fa2a8ef17224bd8003 (do not edit this line) */