Json question

[EthernautParticipant]

Consider this json file:

JavaScript

{ "animationClips": { "right": { "loop":true, "rate":12, "frames":[0,1,2,3] }, "left": { "loop":true, "rate":12, "frames":[4,5,6,7] }, "up": { "loop":true, "rate":12, "frames":[8,9,10,11] }, "down": { "loop":true, "rate":12, "frames":[12,13,14,15] } } }

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{ "animationClips": { "right": { "loop":true, "rate":12, "frames":[0,1,2,3] }, "left": { "loop":true, "rate":12, "frames":[4,5,6,7] }, "up": { "loop":true, "rate":12, "frames":[8,9,10,11] }, "down": { "loop":true, "rate":12, "frames":[12,13,14,15] } } }

And this M2 code to read it:

Monkey

#Import "<std>" #Import "test.json" Using std.. Function Main() Local data := JsonObject.Load( "asset::test.json" ) If data Local clips := data.GetObject( "animationClips" ) If clips For Local c := Eachin clips.ToObject() Local loop := Cast<JsonObject>( c.Value ).GetBool( "loop" ) Local rate := Cast<JsonObject>( c.Value ).GetNumber( "rate" ) Local frames := Cast<JsonObject>( c.Value ).GetArray( "frames" ) Print " ~nanim:" + c.Key If loop Print "True" If rate Print rate If frames Local text := "" For Local n := Eachin frames text += n.ToNumber() + " " Next Print text End Next End End End

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#Import "<std>" #Import "test.json"   Using std..   Function Main()   Local data := JsonObject.Load( "asset::test.json" ) If data Local clips := data.GetObject( "animationClips" ) If clips For Local c := Eachin clips.ToObject() Local loop := Cast<JsonObject>( c.Value ).GetBool( "loop" ) Local rate := Cast<JsonObject>( c.Value ).GetNumber( "rate" ) Local frames := Cast<JsonObject>( c.Value ).GetArray( "frames" ) Print " ~nanim:" + c.Key If loop Print "True" If rate Print rate If frames Local text := "" For Local n := Eachin frames text += n.ToNumber() + " " Next Print text End Next End End End

I want to iterate through each of the animation clips in the json file and print their values, just for this test.

Is there a cleaner way to access the iterator? Can I get rid of all that casting and get the correct type (JsonObject) out of the gate? JsonObject.All is not working for me, I get the “Iterator has no ‘AtEnd’ property” error.

[codifiesParticipant]

can’t see most of your code, not sure what you’re trying to improve…??

[EthernautParticipant]

1.I’m trying to get rid of the casting. Is there a way to iterate the JsonObjects directly, instead of JsonValues? Which led me to…

2.I was wondering if there’s something wrong with JsonObject.All. I get an error when I try to use it instead of JsonObject.ToObject() (which returns a map)

Thanks.

[peterigzParticipant]

I use ToString/ToNumber etc. Here’s a snippet from a json loader I’m using if it helps:

Monkey

json = json.Load(file) directory = ExtractDir(file) If Not json RuntimeError("Couldn't load config for " + file) If json["width"] width = json["width"].ToNumber() If json["height"] height = json["height"].ToNumber() If json["frames"] frames = json["frames"].ToNumber() If json["statictile"] statictile = json["statictile"].ToNumber() If json["collisions"] And json["collisions"].IsArray collisionframe = New tlCollisionInfo[json["collisions"].ToArray().Length] Local index:Int = 0 Local collisions:=json["collisions"].ToArray() collisionframe = New tlCollisionInfo[collisions.Length] For Local collisionobj:=Eachin collisions Local collision:=collisionobj.ToObject() If collision["type"] Select collision["type"].ToString() Case "poly" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlPOLY_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].verts = JsonFloatArray(collision["verts"].ToArray()) Case "box" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlBOX_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].width = collision["width"].ToNumber() collisionframe[index].height = collision["height"].ToNumber() Case "circle" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlCIRCLE_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].radius = collision["radius"].ToNumber() End Else RuntimeError("Error loading resource config") End If index+=1 Next End If If json["files"] And json["files"].IsArray files = New String[json["files"].ToArray().Length] Local tmpfiles:=json["files"].ToArray() Local i:Int = 0 For Local file:=Eachin tmpfiles files[i] = file.ToString() i+=1 Next End If

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json = json.Load(file) directory = ExtractDir(file) If Not json RuntimeError("Couldn't load config for " + file) If json["width"] width = json["width"].ToNumber() If json["height"] height = json["height"].ToNumber() If json["frames"] frames = json["frames"].ToNumber() If json["statictile"] statictile = json["statictile"].ToNumber() If json["collisions"] And json["collisions"].IsArray collisionframe = New tlCollisionInfo[json["collisions"].ToArray().Length] Local index:Int = 0 Local collisions:=json["collisions"].ToArray() collisionframe = New tlCollisionInfo[collisions.Length] For Local collisionobj:=Eachin collisions Local collision:=collisionobj.ToObject() If collision["type"] Select collision["type"].ToString() Case "poly" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlPOLY_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].verts = JsonFloatArray(collision["verts"].ToArray()) Case "box" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlBOX_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].width = collision["width"].ToNumber() collisionframe[index].height = collision["height"].ToNumber() Case "circle" collisionframe[index] = New tlCollisionInfo collisionframe[index].collisiontype = tlCIRCLE_COLLISION collisionframe[index].x = collision["handlex"].ToNumber() collisionframe[index].y = collision["handley"].ToNumber() collisionframe[index].radius = collision["radius"].ToNumber() End Else RuntimeError("Error loading resource config") End If index+=1 Next End If If json["files"] And json["files"].IsArray files = New String[json["files"].ToArray().Length] Local tmpfiles:=json["files"].ToArray() Local i:Int = 0 For Local file:=Eachin tmpfiles files[i] = file.ToString() i+=1 Next End If

And the json file for reference:

Monkey

{ "width":32, "height":32, "frames":16, "files": [ "solidblock_01.png", "solidblock_02.png", "solidblock_03.png", "solidblock_04.png", "solidblock_05.png", "solidblock_06.png", "solidblock_07.png", "solidblock_08.png", "solidblock_09.png", "solidblock_10.png", "solidblock_11.png", "solidblock_12.png", "solidblock_13.png", "solidblock_14.png", "solidblock_15.png", "solidblock_16.png" ], "statictile":1, "collisions": [ {"type":"poly","handlex":10.5,"handley":10.5,"verts": [ 32,32,32,16,16,32 ] }, {"type":"poly","handlex":-10.5,"handley":10.5,"verts": [ 16,32,0,16,0,32 ] }, {"type":"poly","handlex":10.5,"handley":-10.5,"verts": [ 32,0,16,0,32,16 ] }, {"type":"poly","handlex":-10.5,"handley":-10.5,"verts": [ 16,0,0,0,0,16 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,16,0,32,32,32,32,0,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,32,32,32,32,16,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,32,16,32,32,16,32,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,16,16,32,32,32,32,0 ] }, {"type":"box","handlex":8,"handley":0,"width":16,"height":32}, {"type":"box","handlex":0,"handley":-8,"width":32,"height":16}, {"type":"box","handlex":-8,"handley":0,"width":16,"height":32}, {"type":"box","handlex":0,"handley":8,"width":32,"height":16}, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,16,16,32,32,32,32,16,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,16,0,32,16,32,32,16,32,0,16,0 ] }, {"type":"box","handlex":0,"handley":0,"width":32,"height":32}, {"type":"box","handlex":0,"handley":0,"width":32,"height":32} ] }

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{ "width":32, "height":32, "frames":16, "files": [ "solidblock_01.png", "solidblock_02.png", "solidblock_03.png", "solidblock_04.png", "solidblock_05.png", "solidblock_06.png", "solidblock_07.png", "solidblock_08.png", "solidblock_09.png", "solidblock_10.png", "solidblock_11.png", "solidblock_12.png", "solidblock_13.png", "solidblock_14.png", "solidblock_15.png", "solidblock_16.png" ], "statictile":1, "collisions": [ {"type":"poly","handlex":10.5,"handley":10.5,"verts": [ 32,32,32,16,16,32 ] }, {"type":"poly","handlex":-10.5,"handley":10.5,"verts": [ 16,32,0,16,0,32 ] }, {"type":"poly","handlex":10.5,"handley":-10.5,"verts": [ 32,0,16,0,32,16 ] }, {"type":"poly","handlex":-10.5,"handley":-10.5,"verts": [ 16,0,0,0,0,16 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,16,0,32,32,32,32,0,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,32,32,32,32,16,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,32,16,32,32,16,32,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,16,16,32,32,32,32,0 ] }, {"type":"box","handlex":8,"handley":0,"width":16,"height":32}, {"type":"box","handlex":0,"handley":-8,"width":32,"height":16}, {"type":"box","handlex":-8,"handley":0,"width":16,"height":32}, {"type":"box","handlex":0,"handley":8,"width":32,"height":16}, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,0,0,16,16,32,32,32,32,16,16,0 ] }, {"type":"poly","handlex":0,"handley":0,"verts": [ 0,16,0,32,16,32,32,16,32,0,16,0 ] }, {"type":"box","handlex":0,"handley":0,"width":32,"height":32}, {"type":"box","handlex":0,"handley":0,"width":32,"height":32} ] }

[codifiesParticipant]

Monkey

[crayon-5cb9c1efa79dd366168617 inline="true" ] If json["width"] width = json["width"].ToNumber() If json["height"] height = json["height"].ToNumber() If json["frames"] frames = json["frames"].ToNumber()

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[crayon-5cb9c1efa79dd366168617 inline="true" ] If json["width"] width = json["width"].ToNumber() If json["height"] height = json["height"].ToNumber() If json["frames"] frames = json["frames"].ToNumber()

[/crayon]

I wonder if these couldn’t be done with reflection, ie the jason property name provides the variable name thats looked up and used via reflection, but mind you this could potentially cause a security issue…

[EthernautParticipant]

Thanks, that is helpful. This looks a bit more neat.

Monkey

#Import "<std>" #Import "test.json" Using std.. Function Main() Local data := JsonObject.Load( "asset::test.json" ) If data Local clips := data.GetObject( "animationClips" ) If clips For Local c := Eachin clips.ToObject() Local obj := c.Value.ToObject() Local loop := obj[ "loop" ].ToBool() Local rate := obj[ "rate" ].ToNumber() Local frames := obj[ "frames" ].ToArray() Next End End End

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#Import "<std>" #Import "test.json"   Using std..   Function Main()   Local data := JsonObject.Load( "asset::test.json" ) If data Local clips := data.GetObject( "animationClips" ) If clips For Local c := Eachin clips.ToObject() Local obj := c.Value.ToObject() Local loop := obj[ "loop" ].ToBool() Local rate := obj[ "rate" ].ToNumber() Local frames := obj[ "frames" ].ToArray() Next End End End

I had t add the line “Local obj := c.Value.ToObject()” which essentially casts the JsonValue as an object, so functionally it’s not that different, but it’s easier to read.

[Author]

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