BaseReader.java

/*
  BaseReader.java

  (c) 2012-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.engine.demos.stream;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

import ejs.base.utils.CountingInputStream;

/**
 * @author ejs
 *
 */
public class BaseReader {

	protected CountingInputStream is;

	/**
	 * 
	 */
	public BaseReader(InputStream is) {
		BufferedInputStream bis = is instanceof BufferedInputStream ? 
				(BufferedInputStream) is : new BufferedInputStream(is);
		this.is = new CountingInputStream(bis);
	}
	
	public long getPosition() {
		return is.getPosition();
	}

	public IOException newFormatException(String string) {
		return newFormatException(string, getPosition());
	}

	public IOException newFormatException(String string, long effectivePos) {
		return new IOException("Demo corrupted at 0x" + 
				Long.toHexString(effectivePos) + ": " + string);

	}

	/**
	 * @return the is
	 */
	public CountingInputStream getInputStream() {
		return is;
	}


}