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/* Generated by: ParserGeneratorCC: Do not edit this line. StreamProvider.java Version 1.1 */
/* ParserGeneratorCCOptions:KEEP_LINE_COLUMN=true */
/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2016 The JavaParser Team.
 * Copyright 2019 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 *
 * Modified by Red Hat, Inc.
 */
package org.drools.mvel.parser;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

/**
 * NOTE : This generated class can be safely deleted if installing in a GWT installation (use StringProvider instead)
 */
public class StreamProvider implements Provider {
	private Reader _reader;
	
  @Deprecated
  public StreamProvider(final InputStream stream, final String charsetName) throws IOException {
    this (new BufferedReader(new InputStreamReader(stream, charsetName)));
  }
  
  public StreamProvider(final InputStream stream, final java.nio.charset.Charset charset) {
    this (new BufferedReader(new InputStreamReader(stream, charset)));
  }

  public StreamProvider(final Reader reader) {
    _reader = reader;
  }

  public int read(final char[] aDest, final int nOfs, final int nLen) throws IOException {
    int result = _reader.read(aDest, nOfs, nLen);

    /* CBA -- Added 2014/03/29 -- 
       This logic allows the generated Java code to be easily translated to C# (via sharpen) -
       as in C# 0 represents end of file, and in Java, -1 represents end of file
       See : http://msdn.microsoft.com/en-us/library/9kstw824(v=vs.110).aspx
       ** Technically, this is not required for java but the overhead is extremely low compared to the code generation benefits.
	   */
    if (result == 0)
      if (nOfs < aDest.length && nLen > 0)
        result = -1;
	   
    return result;
	}

	public void close() throws IOException {
    _reader.close();
	}
}
/* ParserGeneratorCC - OriginalChecksum=a21003ed051749d1e2e38e18fe29d1c7 (do not edit this line) */