dev-npgsql/npgsql: Npgsql is the .NET data provider for PostgreSQL.

src/Npgsql.SourceGenerators/NpgsqlConnectionStringBuilder.snbtxt
123 строки4 KB
Shay Rojansky
Case-insensitive enum parsing in the connection string (#4314)
05 фев 2022, 14:56
05 фев 2022, 14:56403da2e
using System;
using System.Collections.Generic;

#nullable disable
#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
#pragma warning disable RS0016 // Add public types and members to the declared API
#pragma warning disable 618 // Member is obsolete

namespace Npgsql
{
    public sealed partial class NpgsqlConnectionStringBuilder
    {
        private partial int Init()
        {
            // Set the strongly-typed properties to their default values
            {{
               for p in properties
                 if p.is_obsolete
                   continue
                 end

                 if (p.default_value != null)
            }}
            {{ p.name }} = {{ p.default_value }};
            {{
                 end
               end }}

            // Setting the strongly-typed properties here also set the string-based properties in the base class.
            // Clear them (default settings = empty connection string)
            base.Clear();

            return 0;
        }

        private partial int GeneratedSetter(string keyword, object value)
        {
            switch (keyword)
            {
            {{ for kv in properties_by_keyword }}
            case "{{ kv.key }}":
            {{ p = kv.value }}
            {{ if p.is_enum }}
            {
                {{ p.name }} = value is string s
                    ? ({{ p.type_name }})Enum.Parse(typeof({{ p.type_name }}), s, ignoreCase: true)
                    : ({{ p.type_name }})Convert.ChangeType(value, typeof({{ p.type_name }}));
            }
            {{ else }}
                {{ p.name }} = ({{ p.type_name }})Convert.ChangeType(value, typeof({{ p.type_name }}));
            {{ end }}
                break;
            {{ end }}

                default:
                    throw new KeyNotFoundException();
            }

            return 0;
        }

        private partial bool TryGetValueGenerated(string keyword, out object value)
        {
            switch (keyword)
            {
            {{ for kv in properties_by_keyword }}
            case "{{ kv.key }}":
            {{ p = kv.value }}
                value = (object){{ p.name }} ?? "";
                return true;
            {{ end }}
            }

            value = null;
            return false;
        }

        private partial bool ContainsKeyGenerated(string keyword)
            => keyword switch
            {
                {{ for kv in properties_by_keyword }}
                "{{ kv.key }}" => true,
                {{ end }}

                _ => false
            };

        private partial bool RemoveGenerated(string keyword)
        {
            switch (keyword)
            {
            {{ for kv in properties_by_keyword }}
            case "{{ kv.key }}":
            {
                {{ p = kv.value }}
                var removed = base.ContainsKey("{{ p.canonical_name }}");
                // Note that string property setters call SetValue, which itself calls base.Remove().
                {{ if p.default_value == null }}
                {{ p.name }} = default;
                {{ else }}
                {{ p.name }} = {{ p.default_value }};
                {{ end }}
                base.Remove("{{ p.canonical_name }}");
                return removed;
            }
            {{ end }}

            default:
                throw new KeyNotFoundException();
            }
        }

        private partial string ToCanonicalKeyword(string keyword)
            => keyword switch
            {
                {{ for kv in properties_by_keyword }}
                "{{ kv.key }}" => "{{ kv.value.canonical_name }}",
                {{ end }}

                _ => throw new KeyNotFoundException()
            };
    }
}