69 lines
1.9 KiB
C#
69 lines
1.9 KiB
C#
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using System;
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using System.Collections.Generic;
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using mustache.Properties;
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namespace mustache
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{
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internal sealed class Scope
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{
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private readonly object topLevel;
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private Scope parent;
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public Scope(object topLevel)
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{
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parent = null;
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this.topLevel = topLevel;
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}
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public Scope CreateChildScope(object topLevel)
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{
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Scope scope = new Scope(topLevel);
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scope.parent = this;
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return scope;
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}
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public object Find(string name)
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{
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string[] names = name.Split('.');
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string member = names[0];
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object nextLevel = topLevel;
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if (member != "this")
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{
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nextLevel = find(member);
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}
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for (int index = 1; index < names.Length; ++index)
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{
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IDictionary<string, object> context = toLookup(nextLevel);
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member = names[index];
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nextLevel = context[member];
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}
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return nextLevel;
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}
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private object find(string name)
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{
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IDictionary<string, object> lookup = toLookup(topLevel);
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if (lookup.ContainsKey(name))
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{
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return lookup[name];
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}
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if (parent == null)
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{
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string message = String.Format(Resources.KeyNotFound, name);
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throw new KeyNotFoundException(message);
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}
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return parent.find(name);
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}
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private static IDictionary<string, object> toLookup(object value)
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{
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IDictionary<string, object> lookup = value as IDictionary<string, object>;
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if (lookup == null)
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{
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lookup = new PropertyDictionary(value);
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}
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return lookup;
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}
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}
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}
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