package logging;

import java.util.Vector;

public final class LogElementList<LOG extends LogElement> extends Vector<LOG> {
	private int actual;
	private boolean initialized;

	public LogElementList() {
		super();
		actual = -1;
		initialized = false;
	}

	public LOG get() {
		return get(actual);
	}

	public boolean isInitialized() {
		return initialized;
	}

	public void clear() {
		super.clear();
		actual = -1;
		initialized = false;
	}

	public void prev() {
		if (actual > 0) {
			actual--;
		} else {
			actual = 0;
		}
		initialized = true;
	}

	public void next() {
		if (actual < size() - 1) {
			actual++;
		} else {
			actual = size() - 1;
		}
		initialized = true;
	}

	public void first() {
		actual = 0;
		initialized = true;
	}

	public void last() {
		actual = size() - 1;
		initialized = true;
	}
}