108 lines
2.8 KiB
C#
108 lines
2.8 KiB
C#
/*
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* dbMango
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*
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* Copyright 2025 Deutsche Bank AG
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace Rms.Risk.Mango.Language.Ast;
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public class AstExpressionUnary : AstExpression
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{
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public enum OperationType
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{
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NOT,
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MINUS,
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PLUS
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}
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public AstExpressionUnary(OperationType op, AstExpression arg1)
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{
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Operator = op;
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Add(arg1);
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}
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public OperationType Operator { get; }
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public string OperatorStr => Operator switch
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{
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OperationType.NOT => "NOT",
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OperationType.MINUS => "-",
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OperationType.PLUS => "+",
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_ => throw new($"Invalid operator '{Operator}'")
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};
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public AstExpression Arg1 => Children.OfType<AstExpression>().First();
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public override void Append(StringBuilder sb, int indent)
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{
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switch (Operator)
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{
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case OperationType.MINUS:
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sb.Append("- ");
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break;
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case OperationType.PLUS:
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sb.Append("+ ");
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break;
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case OperationType.NOT:
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sb.Append("NOT ");
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break;
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}
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Arg1.Append(sb, indent);
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}
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public override JsonNode? AsJson()
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{
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switch (Operator)
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{
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case OperationType.PLUS:
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return Arg1.AsJson();
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case OperationType.MINUS:
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{
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var left = JsonValue.Create(0);
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var right = Arg1.AsJson();
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var op = new JsonObject(
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[
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new(
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"$subtract",
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new JsonArray { new []{left,right} }
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)
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]
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);
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return op;
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}
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case OperationType.NOT:
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{
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var right = Arg1.AsJson();
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var op = new JsonObject(
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[
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new(
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"$not",
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new JsonArray { new []{right} }
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)
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]
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);
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return op;
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}
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default:
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throw new($"Invalid operator '{Operator}'");
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}
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}
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}
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