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1 ???using System; |
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2 using System.Collections.Generic; |
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3 using System.Text; |
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4 |
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5 namespace UCIS.Pml { |
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6 public class PmlBuilder { |
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7 private IPmlWriter pWriter; |
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8 private Stack<PmlElement> pStack = new Stack<PmlElement>(); |
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9 |
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10 public PmlBuilder(IPmlWriter Writer) { |
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11 pWriter = Writer; |
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12 } |
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13 public PmlBuilder() { |
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14 pWriter = null; |
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15 } |
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16 |
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17 public IPmlWriter BaseWriter { |
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18 get { return pWriter; } |
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19 set { pWriter = value; } |
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20 } |
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21 |
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22 private PmlElement AddChildElement(PmlElement Element, bool AddToStack) { |
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23 return AddChildElement(Element, AddToStack, null); |
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24 } |
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25 private PmlElement AddChildElement(PmlElement Element, bool AddToStack, string ChildName) { |
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26 PmlElement Parent; |
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27 if (pStack.Count > 0) { |
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28 Parent = pStack.Peek(); |
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29 if (Parent is PmlDictionary) { |
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30 if (ChildName == null) throw new ArgumentNullException("ChildName", "Dictionary items need a Name"); |
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31 ((PmlDictionary)Parent).Add(ChildName, Element); |
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32 } else if (Parent is PmlCollection) { |
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33 if (ChildName != null) throw new ArgumentOutOfRangeException("ChildName", "Can not add named element to a Collection"); |
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34 ((PmlCollection)Parent).Add(Element); |
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35 } else { |
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36 throw new InvalidOperationException("Invalid Element type in stack: " + Parent.Type.ToString()); |
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37 } |
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38 } else { |
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39 if (ChildName != null) { |
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40 throw new ArgumentOutOfRangeException("ChildName", "Can not create named element without container (Dictionary)"); |
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41 } else if (!AddToStack) { |
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42 pWriter.WriteMessage(Element); |
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43 } |
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44 } |
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45 if (AddToStack) pStack.Push(Element); |
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46 return Element; |
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47 } |
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48 |
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49 public PmlElement EndElement() { |
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50 if (pStack.Count > 0) { |
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51 PmlElement Element = pStack.Pop(); |
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52 if (pStack.Count == 0) { |
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53 if (pWriter != null) pWriter.WriteMessage(Element); |
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54 } |
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55 return Element; |
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56 } else { |
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57 return null; |
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58 } |
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59 } |
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60 public PmlElement GetMessage() { |
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61 if (pStack.Count == 1) { |
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62 PmlElement Element = pStack.Pop(); |
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63 return Element; |
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64 } else if (pStack.Count == 0) { |
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65 throw new InvalidOperationException("No stacked element. The top most element should not be ended. All elements, except Dictionary and Collection, are sent automatically."); |
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66 } else { |
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67 throw new InvalidOperationException("All elements, except for the top most element, should be ended."); |
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68 } |
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69 } |
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70 |
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71 public PmlElement SendMessage() { |
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72 PmlElement Element; |
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73 if (pWriter == null) throw new NullReferenceException("Writer is not set"); |
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74 Element = GetMessage(); |
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75 pWriter.WriteMessage(Element); |
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76 return Element; |
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77 } |
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78 |
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79 public PmlDictionary Dictionary() { |
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80 return (PmlDictionary)AddChildElement(new PmlDictionary(), true); |
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81 } |
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82 public PmlCollection Collection() { |
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83 return (PmlCollection)AddChildElement(new PmlCollection(), true); |
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84 } |
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85 public PmlString String(string Value) { |
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86 return (PmlString)AddChildElement(new PmlString(Value), false); |
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87 } |
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88 public PmlBinary Binary(byte[] Value) { |
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89 return (PmlBinary)AddChildElement(new PmlBinary(Value), false); |
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90 } |
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91 public PmlInteger Integer(UInt64 Value) { |
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92 return (PmlInteger)AddChildElement(new PmlInteger(Value), false); |
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93 } |
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94 public PmlInteger Integer(Int64 Value) { |
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95 return (PmlInteger)AddChildElement(new PmlInteger(Value), false); |
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96 } |
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97 public PmlNull Null() { |
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98 return (PmlNull)AddChildElement(new PmlNull(), false); |
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99 } |
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100 public PmlElement Element(PmlElement Child) { |
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101 return AddChildElement(Child, false); |
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102 } |
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103 |
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104 public PmlDictionary Dictionary(string Name) { |
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105 return (PmlDictionary)AddChildElement(new PmlDictionary(), true, Name); |
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106 } |
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107 public PmlCollection Collection(string Name) { |
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108 return (PmlCollection)AddChildElement(new PmlCollection(), true, Name); |
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109 } |
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110 public PmlString String(string Name, string Value) { |
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111 return (PmlString)AddChildElement(new PmlString(Value), false, Name); |
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112 } |
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113 public PmlBinary Binary(string Name, byte[] Value) { |
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114 return (PmlBinary)AddChildElement(new PmlBinary(Value), false, Name); |
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115 } |
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116 public PmlInteger Integer(string Name, UInt64 Value) { |
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117 return (PmlInteger)AddChildElement(new PmlInteger(Value), false, Name); |
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118 } |
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119 public PmlInteger Integer(string Name, Int64 Value) { |
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120 return (PmlInteger)AddChildElement(new PmlInteger(Value), false, Name); |
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121 } |
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122 public PmlNull Null(string Name) { |
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123 return (PmlNull)AddChildElement(new PmlNull(), false, Name); |
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124 } |
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125 public PmlElement Element(string Name, PmlElement Child) { |
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126 return AddChildElement(Child, false, Name); |
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127 } |
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128 } |
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129 } |
