72 lines
3.1 KiB
C#
72 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq.Expressions;
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namespace CPF.Windows.Json.Serializer
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{
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[ExpressionBuildType(SerializerBuildTypeEnum.IDictionaryGeneric)]
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internal class IDictionaryGenericBuild : ExpressionJsonFormatter
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{
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internal static Expression Build(Type type, ParameterExpression instanceArg)
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{
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Type[] genericArguments = type.GetGenericArguments();
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if (genericArguments.Length == 0)
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{
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Type idic = type.GetInterface("IDictionary`2");
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genericArguments = idic.GetGenericArguments();
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}
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Type keyType = genericArguments[0];
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Type valueType = genericArguments[1];
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List<Expression> methodCall = new List<Expression>();
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if (!type.IsValueType)
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{
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ConditionalExpression ifNullAppendNull = Expression.IfThen(
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Expression.Equal(instanceArg, Expression.Constant(null, type)),
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Expression.Block(ExpressionMembers.Append("null"),
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Expression.Return(ExpressionMembers.ReturnLable)
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));
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methodCall.Add(ifNullAppendNull);
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}
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methodCall.Add(ExpressionMembers.IsIgnoreSelfRefernce(instanceArg, ExpressionMembers.RefernceByEmptyType.Dictionary));
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methodCall.Add(ExpressionMembers.Append("{"));
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ParameterExpression isFirst = Expression.Variable(typeof(bool), "isFirst");
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Expression foreachs = ExpressionHelper.ForEach(instanceArg, Expression.Parameter(typeof(KeyValuePair<,>).MakeGenericType(keyType, valueType), "loopVar"),
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item =>
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{
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List<Expression> calls = new List<Expression>
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{
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Expression.IfThenElse(
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Expression.IsFalse(isFirst),
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Expression.Assign(isFirst, Expression.Constant(true)),
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ExpressionMembers.Append(",")
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)
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};
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MemberExpression key = Expression.MakeMemberAccess(item, typeof(KeyValuePair<,>).MakeGenericType(keyType, valueType).GetProperty("Key"));
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MemberExpression value = Expression.MakeMemberAccess(item, typeof(KeyValuePair<,>).MakeGenericType(keyType, valueType).GetProperty("Value"));
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calls.Add(ExpressionMembers.WriteKeyValuePairKey(keyType, key));
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calls.Add(ExpressionMembers.GetMethodCall(valueType, value));
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return Expression.Block(new[] { isFirst }, calls);
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}
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);
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methodCall.Add(foreachs);
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methodCall.Add(ExpressionMembers.Append("}"));
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methodCall.Add(ExpressionMembers.IsReferenceLoopHandlingIsNoneSerializeStacksArgPop);
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methodCall.Add(Expression.Label(ExpressionMembers.ReturnLable));
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return Expression.Block(methodCall);
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}
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}
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}
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