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package ru.curs.celesta.dbutils.term;

import ru.curs.celesta.dbutils.QueryBuildingHelper;
import ru.curs.celesta.dbutils.stmt.ParameterSetter;

import java.util.List;

/**
 * Negation of where clause.
 */
public final class NotTerm extends WhereTerm {
    private final WhereTerm a;

    private NotTerm(WhereTerm a) {
        this.a = a;
    }

    static WhereTerm construct(WhereTerm a) {
        if (a instanceof AlwaysFalse) {
            return AlwaysTrue.TRUE;
        } else if (a instanceof AlwaysTrue) {
            return AlwaysFalse.FALSE;
        } else {
            return new NotTerm(a);
        }
    }

    @Override
    public String getWhere()  {
        return String.format("(not %s)", a.getWhere());
    }

    @Override
    public void programParams(
            List program, QueryBuildingHelper queryBuildingHelper
    )  {
        a.programParams(program, queryBuildingHelper);
    }
}