org.liveontologies.puli.AbstractProofStep Maven / Gradle / Ivy

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/*-
 * #%L
 * Proof Utility Library
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2014 - 2017 Live Ontologies Project
 * %%
 * 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.
 * #L%
 */
package org.liveontologies.puli;

public abstract class AbstractProofStep implements ProofStep {

	protected int hashCode = 0;

	@Override
	public boolean equals(Object o) {
		return Inferences.equals(this, o);
	}

	@Override
	public synchronized int hashCode() {
		if (hashCode == 0) {
			hashCode = Inferences.hashCode(this);
		}
		return hashCode;
	}

	@Override
	public String toString() {
		return Inferences.toString(this);
	}

}