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PatternTesting Runtime (patterntesting-rt) is the runtime component for the PatternTesting framework. It provides the annotations and base classes for the PatternTesting testing framework (e.g. patterntesting-check, patterntesting-concurrent or patterntesting-exception) but can be also used standalone for classpath monitoring or profiling. It uses AOP and AspectJ to perform this feat.

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/**
 * $Id: Contract.java,v 1.5 2016/12/10 20:55:23 oboehm Exp $
 *
 * Copyright (c) 2008 by Oliver Boehm
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express orimplied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * (c)reated 29.01.2009 by oliver ([email protected])
 */
package patterntesting.runtime.dbc;

/**
 * With this Contract interface you can realize Design-by-Contract, also known
 * as DbC. See also
 * Jass (as another
 * approach for DbC).
 *
 * @author oliver
 * @version $Revision: 1.5 $
 * @since 29.01.2009
 */
public interface Contract {

	/**
	 * This method checks if the conditions of the invariants are still true. It
	 * is evaluated at the end of each method call (e.g. you can think of it as
	 * a global postcondition).
	 *
	 * @return true otherwise the invariant contract was violated
	 */
	boolean invariant();

}