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Stochastice Performance Logic is a formalism for capturing performance assumptions. It is, for example, possible to capture assumption that newer version of a function bar is faster than the previous version or that library foobar is faster than library barfoo when rendering antialiased text. The purpose of this framework is to allow evaluation of SPL formulas inside Java applications.

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/*
 * Copyright 2015 Charles University in Prague
 * Copyright 2015 Vojtech Horky
 * 
 * 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 or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cz.cuni.mff.d3s.spl;

/** Result of evaluation of SPL formula.
 * 
 */
public enum Result {
	/** The result cannot be computed.
	 * 
	 * There can be several reasons, e.g. insufficient amount of data
	 * (number of collected samples too small). 
	 */
	CANNOT_COMPUTE {
		@Override
		public String toString() {
			return "cannot compute";
		}
	},

	/** The SPL formula evaluates to true. */
	TRUE {
		@Override
		public String toString() {
			return "complies";
		}
	},

	/** The SPL formula evaluates to false. */
	FALSE {
		@Override
		public String toString() {
			return "violates";
		}
	}
}