package org.aksw.sparqlify.core.cast;
import java.util.List;
import org.aksw.sparqlify.algebra.sql.exprs2.SqlExpr;
import org.aksw.sparqlify.core.sparql.algebra.transform.SqlExprUtils;
import org.aksw.sparqlify.core.sql.expr.evaluation.SqlExprEvaluator;
public abstract class SqlExprEvaluatorConstantsOnly
implements SqlExprEvaluator
{
public SqlExpr eval(List<SqlExpr> args) {
boolean isConstantsOnly = SqlExprUtils.isConstantsOnly(args);
SqlExpr result;
if(isConstantsOnly) {
result = _eval(args);
} else {
result = null;
}
return result;
}
protected abstract SqlExpr _eval(List<SqlExpr> args);
}