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// Copyright (c) 2003-2014, Jodd Team (com.facebook.presto.hive.$internal.jodd.org). All Rights Reserved.

package com.facebook.presto.hive.$internal.jodd.io;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * Output stream used for debugging purposes.
 */
public class DebugOutputStream extends FilterOutputStream {

	// ---------------------------------------------------------------- ctors

	protected boolean passThrough = true;

	/**
	 * Output stream that debugs to system out.
	 */
	public DebugOutputStream() {
		super(System.out);
	}

	public DebugOutputStream(OutputStream out) {
		super(out);
	}

	public DebugOutputStream(boolean passThrough) {
		super(System.out);
		this.passThrough = passThrough;
	}

	public DebugOutputStream(OutputStream out, boolean passThrough) {
		super(out);
		this.passThrough = passThrough;
	}


	// ---------------------------------------------------------------- methods

	@Override
	public void close() throws IOException {
		super.close();
	}

	@Override
	public void flush() throws IOException {
		super.flush();
	}

	@Override
	public void write(int b) throws IOException {
		if (passThrough == true) {
			super.write(b);
		}
		dumpByte(b);
		System.out.println();
	}

	@Override
	public void write(byte b[]) throws IOException {
		super.write(b);
	}

	@Override
	public void write(byte b[], int off, int len) throws IOException {
		if (passThrough == true) {
			super.write(b, off, len);
		}
		int i = off;
		int count = len;
		while (count-- > 0) {
			dumpByte(b[i++]);
		}
		System.out.println();
	}


	/**
	 * Dumps single byte to output stream.
	 */
	protected void dumpByte(int b) {
		if (passThrough == true) {
			System.out.print('\t');
		}
		if (b < 0) {
			b += 128;
		}
		if (b < 0x10) {
			System.out.print('0');
		}

		System.out.print(' ');		
		System.out.print(Integer.toHexString(b).toUpperCase());
	}
}