| 1 | dojo.provide("dojox.lang.aspect.memoizer"); |
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| 2 | |
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| 3 | (function(){ |
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| 4 | var aop = dojox.lang.aspect; |
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| 5 | |
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| 6 | var memoize1 = { |
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| 7 | around: function(key){ |
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| 8 | var ctx = aop.getContext(), self = ctx.joinPoint, that = ctx.instance, t, u, ret; |
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| 9 | if((t = that.__memoizerCache) && (t = t[self.targetName]) && (key in t)){ |
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| 10 | return t[key]; |
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| 11 | } |
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| 12 | var ret = aop.proceed.apply(null, arguments); |
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| 13 | if(!(t = that.__memoizerCache)){ t = that.__memoizerCache = {}; } |
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| 14 | if(!(u = t[self.targetName])){ u = t[self.targetName] = {}; } |
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| 15 | return u[key] = ret; |
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| 16 | } |
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| 17 | }; |
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| 18 | |
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| 19 | var memoizeN = function(/*Function*/keyMaker){ |
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| 20 | return { |
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| 21 | around: function(/*arguments*/){ |
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| 22 | var ctx = aop.getContext(), self = ctx.joinPoint, that = ctx.instance, t, u, ret, |
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| 23 | key = keyMaker.apply(that, arguments); |
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| 24 | if((t = that.__memoizerCache) && (t = t[self.targetName]) && (key in t)){ |
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| 25 | return t[key]; |
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| 26 | } |
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| 27 | var ret = aop.proceed.apply(null, arguments); |
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| 28 | if(!(t = that.__memoizerCache)){ t = that.__memoizerCache = {}; } |
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| 29 | if(!(u = t[self.targetName])){ u = t[self.targetName] = {}; } |
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| 30 | return u[key] = ret; |
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| 31 | } |
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| 32 | }; |
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| 33 | }; |
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| 34 | |
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| 35 | aop.memoizer = function(/*Function?*/ keyMaker){ |
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| 36 | // summary: |
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| 37 | // Returns an object, which can be used to count calls to methods. |
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| 38 | // |
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| 39 | // keyMaker: |
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| 40 | // the function, which takes method's arguments and returns a key, |
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| 41 | // which can be used to index the result. |
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| 42 | |
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| 43 | return arguments.length == 0 ? memoize1 : memoizeN(keyMaker); // Object |
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| 44 | }; |
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| 45 | })(); |
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