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'jdbacl' stands for 'Java DataBase ACcess Layer' and provides utilities for accessing JDBC databases from Java programs, retrieving meta information in an object model and querying database data. 'rapiddweller jdbacl' is forked from Databene jdbacl by Volker Bergmann.

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/*
 * (c) Copyright 2010-2014 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License (GPL).
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. 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 com.rapiddweller.jdbacl.sql.parser;

import com.rapiddweller.common.IOUtil;
import org.antlr.runtime.ANTLRFileStream;
import org.antlr.runtime.ANTLRInputStream;
import org.antlr.runtime.CharStream;

import java.io.IOException;

/**
 * Helper class which provides the content of a file as {@link ANTLRInputStream}
 * while transforming token characters to upper case.


 * Created: 10.08.2010 15:44:57
 *
 * @author Volker Bergmann
 * @since 0.1
 */
public class ANTLRNoCaseFileStream extends ANTLRFileStream implements TextHolder {

  /**
   * The File name.
   */
  String fileName;

  /**
   * Instantiates a new Antlr no case file stream.
   *
   * @param fileName the file name
   * @throws IOException the io exception
   */
  public ANTLRNoCaseFileStream(String fileName) throws IOException {
    this(fileName, null);
  }

  /**
   * Instantiates a new Antlr no case file stream.
   *
   * @param fileName the file name
   * @param encoding the encoding
   * @throws IOException the io exception
   */
  public ANTLRNoCaseFileStream(String fileName, String encoding) throws IOException {
    super(fileName, encoding);
    this.fileName = fileName;
  }

  @Override
  public int LA(int i) {
    if (i == 0) {
      return 0; // undefined
    }
    if (i < 0) {
      i++; // e.g., translate LA(-1) to use offset 0
    }
    if ((p + i - 1) >= n) {
      return CharStream.EOF;
    }
    return Character.toUpperCase(data[p + i - 1]);
  }

  @Override
  public String getText() {
    try {
      return IOUtil.getContentOfURI(fileName);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

}