忽略dll文件git
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“wanyongkang”
@@ -1,364 +0,0 @@
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Linq.Expressions;
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namespace Hncore.Infrastructure.EntitiesExtension
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{
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public abstract class ExpressionVisitor
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{
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protected ExpressionVisitor() { }
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protected virtual Expression Visit(Expression exp)
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{
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if (exp == null)
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return exp;
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switch (exp.NodeType)
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{
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case ExpressionType.Negate:
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case ExpressionType.NegateChecked:
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case ExpressionType.Not:
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case ExpressionType.Convert:
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case ExpressionType.ConvertChecked:
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case ExpressionType.ArrayLength:
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case ExpressionType.Quote:
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case ExpressionType.TypeAs:
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return this.VisitUnary((UnaryExpression)exp);
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case ExpressionType.Add:
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case ExpressionType.AddChecked:
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case ExpressionType.Subtract:
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case ExpressionType.SubtractChecked:
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case ExpressionType.Multiply:
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case ExpressionType.MultiplyChecked:
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case ExpressionType.Divide:
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case ExpressionType.Modulo:
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case ExpressionType.And:
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case ExpressionType.AndAlso:
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case ExpressionType.Or:
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case ExpressionType.OrElse:
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case ExpressionType.LessThan:
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case ExpressionType.LessThanOrEqual:
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case ExpressionType.GreaterThan:
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case ExpressionType.GreaterThanOrEqual:
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case ExpressionType.Equal:
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case ExpressionType.NotEqual:
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case ExpressionType.Coalesce:
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case ExpressionType.ArrayIndex:
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case ExpressionType.RightShift:
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case ExpressionType.LeftShift:
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case ExpressionType.ExclusiveOr:
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return this.VisitBinary((BinaryExpression)exp);
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case ExpressionType.TypeIs:
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return this.VisitTypeIs((TypeBinaryExpression)exp);
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case ExpressionType.Conditional:
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return this.VisitConditional((ConditionalExpression)exp);
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case ExpressionType.Constant:
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return this.VisitConstant((ConstantExpression)exp);
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case ExpressionType.Parameter:
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return this.VisitParameter((ParameterExpression)exp);
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case ExpressionType.MemberAccess:
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return this.VisitMemberAccess((MemberExpression)exp);
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case ExpressionType.Call:
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return this.VisitMethodCall((MethodCallExpression)exp);
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case ExpressionType.Lambda:
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return this.VisitLambda((LambdaExpression)exp);
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case ExpressionType.New:
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return this.VisitNew((NewExpression)exp);
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case ExpressionType.NewArrayInit:
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case ExpressionType.NewArrayBounds:
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return this.VisitNewArray((NewArrayExpression)exp);
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case ExpressionType.Invoke:
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return this.VisitInvocation((InvocationExpression)exp);
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case ExpressionType.MemberInit:
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return this.VisitMemberInit((MemberInitExpression)exp);
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case ExpressionType.ListInit:
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return this.VisitListInit((ListInitExpression)exp);
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default:
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throw new Exception(string.Format("Unhandled expression type: '{0}'", exp.NodeType));
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}
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}
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protected virtual MemberBinding VisitBinding(MemberBinding binding)
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{
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switch (binding.BindingType)
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{
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case MemberBindingType.Assignment:
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return this.VisitMemberAssignment((MemberAssignment)binding);
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case MemberBindingType.MemberBinding:
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return this.VisitMemberMemberBinding((MemberMemberBinding)binding);
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case MemberBindingType.ListBinding:
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return this.VisitMemberListBinding((MemberListBinding)binding);
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default:
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throw new Exception(string.Format("Unhandled binding type '{0}'", binding.BindingType));
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}
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}
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protected virtual ElementInit VisitElementInitializer(ElementInit initializer)
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{
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ReadOnlyCollection<Expression> arguments = this.VisitExpressionList(initializer.Arguments);
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if (arguments != initializer.Arguments)
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{
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return Expression.ElementInit(initializer.AddMethod, arguments);
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}
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return initializer;
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}
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protected virtual Expression VisitUnary(UnaryExpression u)
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{
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Expression operand = this.Visit(u.Operand);
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if (operand != u.Operand)
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{
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return Expression.MakeUnary(u.NodeType, operand, u.Type, u.Method);
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}
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return u;
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}
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protected virtual Expression VisitBinary(BinaryExpression b)
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{
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Expression left = this.Visit(b.Left);
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Expression right = this.Visit(b.Right);
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Expression conversion = this.Visit(b.Conversion);
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if (left != b.Left || right != b.Right || conversion != b.Conversion)
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{
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if (b.NodeType == ExpressionType.Coalesce && b.Conversion != null)
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return Expression.Coalesce(left, right, conversion as LambdaExpression);
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else
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return Expression.MakeBinary(b.NodeType, left, right, b.IsLiftedToNull, b.Method);
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}
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return b;
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}
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protected virtual Expression VisitTypeIs(TypeBinaryExpression b)
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{
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Expression expr = this.Visit(b.Expression);
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if (expr != b.Expression)
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{
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return Expression.TypeIs(expr, b.TypeOperand);
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}
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return b;
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}
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protected virtual Expression VisitConstant(ConstantExpression c)
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{
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return c;
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}
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protected virtual Expression VisitConditional(ConditionalExpression c)
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{
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Expression test = this.Visit(c.Test);
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Expression ifTrue = this.Visit(c.IfTrue);
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Expression ifFalse = this.Visit(c.IfFalse);
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if (test != c.Test || ifTrue != c.IfTrue || ifFalse != c.IfFalse)
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{
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return Expression.Condition(test, ifTrue, ifFalse);
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}
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return c;
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}
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protected virtual Expression VisitParameter(ParameterExpression p)
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{
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return p;
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}
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protected virtual Expression VisitMemberAccess(MemberExpression m)
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{
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Expression exp = this.Visit(m.Expression);
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if (exp != m.Expression)
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{
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return Expression.MakeMemberAccess(exp, m.Member);
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}
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return m;
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}
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protected virtual Expression VisitMethodCall(MethodCallExpression m)
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{
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Expression obj = this.Visit(m.Object);
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IEnumerable<Expression> args = this.VisitExpressionList(m.Arguments);
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if (obj != m.Object || args != m.Arguments)
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{
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return Expression.Call(obj, m.Method, args);
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}
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return m;
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}
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protected virtual ReadOnlyCollection<Expression> VisitExpressionList(ReadOnlyCollection<Expression> original)
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{
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List<Expression> list = null;
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for (int i = 0, n = original.Count; i < n; i++)
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{
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Expression p = this.Visit(original[i]);
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if (list != null)
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{
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list.Add(p);
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}
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else if (p != original[i])
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{
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list = new List<Expression>(n);
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for (int j = 0; j < i; j++)
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{
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list.Add(original[j]);
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}
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list.Add(p);
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}
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}
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if (list != null)
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{
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return list.AsReadOnly();
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}
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return original;
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}
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protected virtual MemberAssignment VisitMemberAssignment(MemberAssignment assignment)
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{
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Expression e = this.Visit(assignment.Expression);
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if (e != assignment.Expression)
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{
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return Expression.Bind(assignment.Member, e);
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}
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return assignment;
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}
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protected virtual MemberMemberBinding VisitMemberMemberBinding(MemberMemberBinding binding)
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{
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IEnumerable<MemberBinding> bindings = this.VisitBindingList(binding.Bindings);
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if (bindings != binding.Bindings)
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{
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return Expression.MemberBind(binding.Member, bindings);
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}
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return binding;
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}
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protected virtual MemberListBinding VisitMemberListBinding(MemberListBinding binding)
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{
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IEnumerable<ElementInit> initializers = this.VisitElementInitializerList(binding.Initializers);
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if (initializers != binding.Initializers)
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{
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return Expression.ListBind(binding.Member, initializers);
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}
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return binding;
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}
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protected virtual IEnumerable<MemberBinding> VisitBindingList(ReadOnlyCollection<MemberBinding> original)
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{
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List<MemberBinding> list = null;
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for (int i = 0, n = original.Count; i < n; i++)
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{
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MemberBinding b = this.VisitBinding(original[i]);
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if (list != null)
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{
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list.Add(b);
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}
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else if (b != original[i])
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{
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list = new List<MemberBinding>(n);
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for (int j = 0; j < i; j++)
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{
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list.Add(original[j]);
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}
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list.Add(b);
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}
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}
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if (list != null)
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return list;
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return original;
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}
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protected virtual IEnumerable<ElementInit> VisitElementInitializerList(ReadOnlyCollection<ElementInit> original)
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{
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List<ElementInit> list = null;
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for (int i = 0, n = original.Count; i < n; i++)
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{
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ElementInit init = this.VisitElementInitializer(original[i]);
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if (list != null)
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{
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list.Add(init);
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}
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else if (init != original[i])
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{
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list = new List<ElementInit>(n);
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for (int j = 0; j < i; j++)
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{
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list.Add(original[j]);
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}
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list.Add(init);
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}
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}
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if (list != null)
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return list;
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return original;
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}
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protected virtual Expression VisitLambda(LambdaExpression lambda)
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{
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Expression body = this.Visit(lambda.Body);
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if (body != lambda.Body)
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{
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return Expression.Lambda(lambda.Type, body, lambda.Parameters);
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}
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return lambda;
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}
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protected virtual NewExpression VisitNew(NewExpression nex)
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{
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IEnumerable<Expression> args = this.VisitExpressionList(nex.Arguments);
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if (args != nex.Arguments)
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{
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if (nex.Members != null)
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return Expression.New(nex.Constructor, args, nex.Members);
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else
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return Expression.New(nex.Constructor, args);
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}
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return nex;
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}
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protected virtual Expression VisitMemberInit(MemberInitExpression init)
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{
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NewExpression n = this.VisitNew(init.NewExpression);
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IEnumerable<MemberBinding> bindings = this.VisitBindingList(init.Bindings);
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if (n != init.NewExpression || bindings != init.Bindings)
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{
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return Expression.MemberInit(n, bindings);
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}
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return init;
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}
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protected virtual Expression VisitListInit(ListInitExpression init)
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{
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NewExpression n = this.VisitNew(init.NewExpression);
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IEnumerable<ElementInit> initializers = this.VisitElementInitializerList(init.Initializers);
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if (n != init.NewExpression || initializers != init.Initializers)
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{
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return Expression.ListInit(n, initializers);
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}
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return init;
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}
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protected virtual Expression VisitNewArray(NewArrayExpression na)
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{
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IEnumerable<Expression> exprs = this.VisitExpressionList(na.Expressions);
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if (exprs != na.Expressions)
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{
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if (na.NodeType == ExpressionType.NewArrayInit)
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{
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return Expression.NewArrayInit(na.Type.GetElementType(), exprs);
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}
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else
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{
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return Expression.NewArrayBounds(na.Type.GetElementType(), exprs);
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}
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}
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return na;
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}
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protected virtual Expression VisitInvocation(InvocationExpression iv)
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{
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IEnumerable<Expression> args = this.VisitExpressionList(iv.Arguments);
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Expression expr = this.Visit(iv.Expression);
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if (args != iv.Arguments || expr != iv.Expression)
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{
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return Expression.Invoke(expr, args);
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}
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return iv;
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}
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}
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}
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