extras/rya.forwardchain/src/main/java/org/apache/rya/forwardchain/rule/AbstractInconsistencyRule.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.rya.forwardchain.rule;

import java.util.Arrays;
import java.util.Collection;

import org.apache.rya.api.domain.StatementMetadata;
import org.apache.rya.forwardchain.ForwardChainException;
import org.apache.rya.forwardchain.strategy.AbstractRuleExecutionStrategy;
import org.eclipse.rdf4j.query.algebra.StatementPattern;

/**
 * A rule that identifies an inconsistency in the data, but does not add or
 * modify any triples.
 */
public abstract class AbstractInconsistencyRule implements Rule {

    @Override
    public boolean canConclude(StatementPattern sp) {
        return false;
    }

    @Override
    public Collection<StatementPattern> getConsequentPatterns() {
        return Arrays.asList();
    }

    @Override
    public long execute(AbstractRuleExecutionStrategy strategy,
            StatementMetadata metadata) throws ForwardChainException {
        return strategy.executeInconsistencyRule(this, metadata);
    }

}