package org.vertexium.cypher.functions.aggregate;
import org.vertexium.cypher.VertexiumCypherQueryContext;
import org.vertexium.cypher.ast.model.CypherAstBase;
import org.vertexium.cypher.exceptions.VertexiumCypherTypeErrorException;
import org.vertexium.cypher.executor.ExpressionScope;
import org.vertexium.cypher.utils.ObjectUtils;
import java.util.List;
import java.util.Objects;
public class MinFunction extends AggregationFunction {
@Override
public Object invoke(VertexiumCypherQueryContext ctx, CypherAstBase[] arguments, ExpressionScope scope) {
assertArgumentCount(arguments, 1);
Object arg0 = ctx.getExpressionExecutor().executeExpression(ctx, arguments[0], scope);
if (arg0 instanceof List) {
List<?> list = (List<?>) arg0;
return list.stream()
.filter(Objects::nonNull)
.min(ObjectUtils::compare)
.orElse(null);
}
throw new VertexiumCypherTypeErrorException(arg0, List.class);
}
}