shared source/sscli20/jscript/engine/customattributelist.cs

   1 // ==++==
   2 //
   3 //
   4 //    Copyright (c) 2006 Microsoft Corporation.  All rights reserved.
   5 //
   6 //    The use and distribution terms for this software are contained in the file
   7 //    named license.txt, which can be found in the root of this distribution.
   8 //    By using this software in any fashion, you are agreeing to be bound by the
   9 //    terms of this license.
  10 //
  11 //    You must not remove this notice, or any other, from this software.
  12 //
  13 //
  14 // ==--==
  15
  16 namespace Microsoft.JScript {
  17
  18   using System;
  19   using System.Collections;
  20   using System.Reflection.Emit;
  21
  22   internal sealed class CustomAttributeList : AST{
  23     private ArrayList list;
  24     private ArrayList customAttributes;
  25     private bool alreadyPartiallyEvaluated;
  26
  27     internal CustomAttributeList(Context context)
  28       : base(context) {
  29       this.list = new ArrayList();
  30       this.customAttributes = null;
  31       this.alreadyPartiallyEvaluated = false;
  32     }
  33
  34     internal void Append(CustomAttribute elem){
  35       this.list.Add(elem);
  36       this.context.UpdateWith(elem.context);
  37     }
  38
  39     internal bool ContainsExpandoAttribute(){ //Use only before partial evaluation has been done
  40       for (int i = 0, n = this.list.Count; i < n; i++){
  41         CustomAttribute ca = (CustomAttribute)this.list[i];
  42         if (ca == null) continue;
  43         if (ca.IsExpandoAttribute()) return true;
  44       }
  45       return false;
  46     }
  47
  48     // Assume the custom attribute list has been partially evaluated already
  49     internal CustomAttribute GetAttribute(Type attributeClass){
  50       for (int i = 0, n = this.list.Count; i < n; i++){
  51         CustomAttribute ca = (CustomAttribute)this.list[i];
  52         if (ca == null) continue;
  53         Object type = ca.type;
  54         if (type is Type)
  55           if (type == attributeClass)
  56             return (CustomAttribute)this.list[i];
  57       }
  58       return null;
  59     }
  60
  61     internal override Object Evaluate(){
  62       return this.Evaluate(false);
  63     }
  64
  65     internal Object Evaluate(bool getForProperty){
  66       int n = this.list.Count;
  67       ArrayList attrValues = new ArrayList(n);
  68       for (int i = 0; i < n; i++){
  69         CustomAttribute ca = (CustomAttribute)this.list[i];
  70         if (ca == null) continue;
  71         if (ca.raiseToPropertyLevel){
  72           if (!getForProperty) continue;
  73         }else
  74           if (getForProperty) continue;
  75         attrValues.Add(ca.Evaluate());
  76       }
  77       Object[] result = new Object[attrValues.Count];
  78       attrValues.CopyTo(result);
  79       return result;
  80     }
  81
  82     internal CustomAttributeBuilder[] GetCustomAttributeBuilders(bool getForProperty){
  83       this.customAttributes = new ArrayList(this.list.Count);
  84       for (int i = 0, n = this.list.Count; i < n; i++){
  85         CustomAttribute ca = (CustomAttribute)this.list[i];
  86         if (ca == null) continue;
  87         if (ca.raiseToPropertyLevel){
  88           if (!getForProperty) continue;
  89         }else
  90           if (getForProperty) continue;
  91         CustomAttributeBuilder attribute = ca.GetCustomAttribute();
  92         if (attribute != null)
  93           this.customAttributes.Add(attribute);
  94       }
  95       CustomAttributeBuilder[] result = new CustomAttributeBuilder[this.customAttributes.Count];
  96       this.customAttributes.CopyTo(result);
  97       return result;
  98     }
  99
 100     internal override AST PartiallyEvaluate(){
 101       if (this.alreadyPartiallyEvaluated) return this;
 102       this.alreadyPartiallyEvaluated = true;
 103       for (int i = 0, n = this.list.Count; i < n; i++)
 104         this.list[i] = ((CustomAttribute)this.list[i]).PartiallyEvaluate();
 105       for (int i = 0, n = this.list.Count; i < n; i++){
 106         CustomAttribute ca = (CustomAttribute)this.list[i];
 107         if (ca == null) continue; //Already found to be invalid
 108         Object caType = ca.GetTypeIfAttributeHasToBeUnique();
 109         if (caType == null) continue;
 110         for (int j = i+1; j < n; j++){
 111           CustomAttribute caj = (CustomAttribute)this.list[j];
 112           if (caj == null) continue;
 113           if (caType == caj.type){
 114             caj.context.HandleError(JSError.CustomAttributeUsedMoreThanOnce);
 115             this.list[j] = null; //Remove duplicate
 116           }
 117         }
 118       }
 119       return this;
 120     }
 121
 122     internal void Remove(CustomAttribute elem){
 123       this.list.Remove(elem);
 124     }
 125
 126     internal void SetTarget(AST target){
 127       for (int i = 0, n = this.list.Count; i < n; i++)
 128         ((CustomAttribute)this.list[i]).SetTarget(target);
 129     }
 130
 131     internal override void TranslateToIL(ILGenerator il, Type rtype){
 132     }
 133
 134     internal override void TranslateToILInitializer(ILGenerator il){
 135     }
 136
 137   }
 138
 139 }