59 lines
2.4 KiB
C#
59 lines
2.4 KiB
C#
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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.IEnumerableGeneric)]
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internal class IEnumerableGenericBuild : 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 arrayItemType = type.GetElementType();
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if (arrayItemType == null)
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{
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Type[] genericArguments = type.GetGenericArguments();
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if (genericArguments.Length == 0)
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arrayItemType = type.GetInterface("IEnumerable`1").GetGenericArguments()[0];
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else
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arrayItemType = genericArguments[0];
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}
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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.Array));
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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(arrayItemType, "loopVar"),
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item => Expression.Block(new[] { isFirst },
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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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ExpressionMembers.GetMethodCall(arrayItemType, item)
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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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