http://cobertura.sourceforge.net: Cobertura is a free Java tool that calculates the percentage of code accessed by tests. It can be used to identify which parts of your Java program are lacking test coverage. It is based on jcoverage.
  • Steven Christou 
/*
 * Cobertura - http://cobertura.sourceforge.net/
 *
 * Copyright (C) 2005 Mark Doliner
 *
 * Cobertura is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Cobertura is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cobertura; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package net.sourceforge.cobertura.coveragedata;

public interface CoverageData {

	double getBranchCoverageRate();

	double getLineCoverageRate();

	int getNumberOfCoveredBranches();

	int getNumberOfCoveredLines();

	int getNumberOfValidBranches();

	int getNumberOfValidLines();

	
Warning: This is generally implemented as a
"shallow" merge.  For our current use, this
should be fine, but in the future it may make
sense to modify the merge methods of the
various classes to do a deep copy of the
appropriate objects.

/**
	 * Warning: This is generally implemented as a
	 * "shallow" merge.  For our current use, this
	 * should be fine, but in the future it may make
	 * sense to modify the merge methods of the
	 * various classes to do a deep copy of the
	 * appropriate objects.
	 */
	void merge(CoverageData coverageData);
}