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/**
 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.liferay.portal.kernel.util;

import java.io.ByteArrayOutputStream;

/**
 * View Source
 *
 * @author Harry Mark
 *
 */
public class ByteArrayMaker extends ByteArrayOutputStream {

	static boolean collect = false;

	static {
		String collectString = System.getProperty(MakerStats.class.getName());

		if (collectString != null) {
			if (collectString.equals("true")) {
				collect = true;
			}
		}
	}

	static MakerStats stats = null;

	static {
		if (collect) {
			stats = new MakerStats(ByteArrayMaker.class.toString());
		}
	}

	static int defaultInitSize = 8000;

	static {
		String defaultInitSizeString = System.getProperty(
			ByteArrayMaker.class.getName() + ".initial.size");

		if (defaultInitSizeString != null) {
			try {
				defaultInitSize = Integer.parseInt(defaultInitSizeString);
			}
			catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	public static MakerStats getStatistics() {
		return stats;
	}

	public ByteArrayMaker() {
		super(defaultInitSize);

		if (collect) {
			_getInfo(new Throwable());
		}
	}

	public ByteArrayMaker(int size) {
		super(size);

		if (collect) {
			_getInfo(new Throwable());
		}
	}

	public byte[] toByteArray() {
		if (collect) {
			stats.add(_caller, _initSize, count);
		}

		return super.toByteArray();
	}

	public String toString() {
		return super.toString();
	}

	private void _getInfo(Throwable t) {
		_initSize = buf.length;

		StackTraceElement[] elements = t.getStackTrace();

		if (elements.length > 1) {
			StackTraceElement el = elements[1];

			_caller =
				el.getClassName() + StringPool.PERIOD + el.getMethodName() +
					StringPool.COLON + el.getLineNumber();
		}
	}

	private int _initSize;
	private String _caller;

}