it.unibz.inf.ontop.iq.node.impl.QueryNodeImpl Maven / Gradle / Ivy

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package it.unibz.inf.ontop.iq.node.impl;

import it.unibz.inf.ontop.injection.IntermediateQueryFactory;
import it.unibz.inf.ontop.iq.IQTree;
import it.unibz.inf.ontop.iq.node.*;
import it.unibz.inf.ontop.model.term.Variable;

import java.util.Optional;

public abstract class QueryNodeImpl implements QueryNode {

    protected final IntermediateQueryFactory iqFactory;

    QueryNodeImpl(IntermediateQueryFactory iqFactory) {
        this.iqFactory = iqFactory;
    }

    @Override
    public abstract int hashCode();

    @Override
    public abstract boolean equals(Object obj);

    /**
     * Default value, to be overridden
     */
    @Override
    public boolean wouldKeepDescendingGroundTermInFilterAbove(Variable variable, boolean isConstant) {
        return false;
    }

}