/*
 * Copyright (c) 2010, 2011 Artem Tikhomirov 
 */
package com.tmate.hgkit.ll;

/**
 *
 * @author artem
 */
public abstract class Revlog {

	private final HgRepository hgRepo;
	protected final RevlogStream content;

	protected Revlog(HgRepository hgRepo, RevlogStream content) {
		if (hgRepo == null) {
			throw new NullPointerException();
		}
		this.hgRepo = hgRepo;
		this.content = content;
	}

	public final HgRepository getRepo() {
		return hgRepo;
	}

	public int getRevisionCount() {
		return content.revisionCount();
	}

	// FIXME byte[] data might be too expensive, for few usecases it may be better to have intermediate Access object (when we don't need full data 
	// instantly - e.g. calculate hash, or comparing two revisions
	public interface Inspector {
		// XXX boolean retVal to indicate whether to continue?
		// TODO specify nodeid and data length, and reuse policy (i.e. if revlog stream doesn't reuse nodeid[] for each call) 
		void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[/*20*/] nodeid, byte[] data);
	}
}