/*
 * 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.hyracks.algebricks.core.algebra.expressions;

import java.util.Collection;
import java.util.Map;

import org.apache.hyracks.algebricks.core.algebra.base.EquivalenceClass;
import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression;
import org.apache.hyracks.algebricks.core.algebra.base.LogicalVariable;
import org.apache.hyracks.algebricks.core.algebra.properties.FunctionalDependency;
import org.apache.hyracks.api.exceptions.SourceLocation;

public abstract class AbstractLogicalExpression implements ILogicalExpression {

    protected SourceLocation sourceLoc;

    @Override
    public void getConstraintsAndEquivClasses(Collection<FunctionalDependency> fds,
            Map<LogicalVariable, EquivalenceClass> equivClasses) {
        // do nothing
    }

    @Override
    public void getConstraintsForOuterJoin(Collection<FunctionalDependency> fds,
            Collection<LogicalVariable> innerSideVars) {
        // do nothing
    }

    @Override
    public boolean isFunctional() {
        return true;
    }

    @Override
    public SourceLocation getSourceLocation() {
        return sourceLoc;
    }

    public void setSourceLocation(SourceLocation sourceLoc) {
        this.sourceLoc = sourceLoc;
    }
}
