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/*
 * Copyright (C) 2010, Google Inc.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
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package org.eclipse.jgit.storage.pack;

import java.util.concurrent.Callable;

import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.ThreadSafeProgressMonitor;

final class DeltaTask implements Callable {
	private final PackConfig config;

	private final ObjectReader templateReader;

	private final DeltaCache dc;

	private final ThreadSafeProgressMonitor pm;

	private final int batchSize;

	private final int start;

	private final ObjectToPack[] list;

	DeltaTask(PackConfig config, ObjectReader reader, DeltaCache dc,
			ThreadSafeProgressMonitor pm, int batchSize, int start,
			ObjectToPack[] list) {
		this.config = config;
		this.templateReader = reader;
		this.dc = dc;
		this.pm = pm;
		this.batchSize = batchSize;
		this.start = start;
		this.list = list;
	}

	public Object call() throws Exception {
		final ObjectReader or = templateReader.newReader();
		try {
			DeltaWindow dw;
			dw = new DeltaWindow(config, dc, or);
			dw.search(pm, list, start, batchSize);
		} finally {
			or.release();
			pm.endWorker();
		}
		return null;
	}
}