1 | using System.Collections.Generic;
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2 | using System;
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3 | namespace Persistence {
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4 | public class XmlFormatter {
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5 |
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6 | delegate string Formatter(ISerializationToken token);
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7 |
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8 | private Dictionary<Type, Formatter> formatters;
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9 | private int depth;
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10 |
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11 | public XmlFormatter() {
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12 | this.formatters = new Dictionary<Type, Formatter>();
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13 | this.formatters.Add(typeof(BeginToken), new Formatter(FormatBegin));
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14 | this.formatters.Add(typeof(EndToken), new Formatter(FormatEnd));
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15 | this.formatters.Add(typeof(PrimitiveToken), new Formatter(FormatData));
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16 | this.formatters.Add(typeof(ReferenceToken), new Formatter(FormatReference));
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17 | this.formatters.Add(typeof(NullReferenceToken), new Formatter(FormatNullReference));
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18 | this.depth = 0;
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19 | }
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20 |
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21 | public string Format(ISerializationToken token) {
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22 | return formatters[token.GetType()](token);
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23 | }
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24 |
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25 | private string Prefix {
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26 | get { return new string(' ', this.depth * 2); }
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27 | }
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28 |
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29 | private string FormatBegin(ISerializationToken token) {
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30 | BeginToken beginToken = (BeginToken)token;
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31 | string result =
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32 | String.Format("{0}<COMPOSITE name=\"{1}\" type=\"{2}\" id=\"{3}\">\n",
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33 | this.Prefix, beginToken.Accessor.Name, beginToken.Accessor.Type, beginToken.Id);
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34 | this.depth += 1;
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35 | return result;
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36 | }
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37 |
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38 | private string FormatEnd(ISerializationToken token) {
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39 | EndToken endToken = (EndToken)token;
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40 | this.depth -= 1;
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41 | return Prefix + "</COMPOSITE>\n";
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42 | }
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43 |
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44 | private string FormatData(ISerializationToken token) {
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45 | PrimitiveToken dataToken = (PrimitiveToken)token;
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46 | return String.Format("{0}<PRIMITIVE name=\"{1}\" type=\"{2}\">{3}</PRIMITIVE>\n",
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47 | this.Prefix, dataToken.accessor.Name, dataToken.accessor.Type, dataToken.Data);
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48 | }
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49 |
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50 | private string FormatReference(ISerializationToken token) {
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51 | ReferenceToken refToken = (ReferenceToken)token;
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52 | return String.Format("{0}<REFERENCE name=\"{1}\" ref=\"{2}\"/>\n",
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53 | this.Prefix, refToken.Name, refToken.Id);
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54 | }
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55 |
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56 | private string FormatNullReference(ISerializationToken token) {
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57 | NullReferenceToken nullRefToken = (NullReferenceToken)token;
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58 | return String.Format("{0}<NULL name=\"{1}\"/>\n",
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59 | this.Prefix, nullRefToken.Name);
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60 | }
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61 | }
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62 | } |
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