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$insert SRPJSONX
// Create a new document with a json object as the root. Name it whatever. Names are for documentation only and never used later.
SRP_JsonX_Begin('MyDocument', '{')
// Since we are in an object, the first parameter should be a memberwe pass a name followed byand a value.
// In this case, the value is "[", which starts a new array and makes that array the current element
SRP_JsonX('employees', '[')
// Since we are in an array, thejust first parameter should be pass a value. In this case, we are starting a new object
SRP_JsonX('{')
SRP_JsonX('firstname', 'John') ; // Since we're in an object, the first parameter is a member we pass name and the second is its value
SRP_JsonX('lastname', 'Doe')
SRP_JsonX('age', 21)
SRP_JsonX('}')
// Note on the previous line that passing "}" closes an object and moves the current element back to the parent, so when we call this next
// line, we are back in the array. Once again, we'll add an employee object
SRP_JsonX('{')
SRP_JsonX('firstname', 'Anna')
SRP_JsonX('lastname', 'Smith')
SRP_JsonX('age', 32)
SRP_JsonX('}')
// We can also pass json strings as a value, which get fully parsed and added to the current element, which is the employees array
SRP_JsonX('{"firstname":"Peter", "lastname":"Jones", "age":43}')
// This line closes the array and sets the current element back to the root object
SRP_JsonX(']')
// When you pass numbers as values, JsonX assumes you want that value to be unquoted in the final json
SRP_JsonX('count', 4)
// To pass a boolean value, we need to add a hint parameter. Hints always come after values
SRP_JsonX('active', 1, 'Bool')
// To set something to null, omit the value. If you cannot omit the value, you can set the hint to 'Null'
SRP_JsonX('alwaysnull')
// If you want a number to be quoted in the json, use the 'String' hint
SRP_JsonX('alwaysstring', 4.321, 'String')
// We're all done, so let's turn the document into pretty formatted json and end it at the same time
Json = SRP_JsonX_End('Pretty') |
In this example, we start a new document called MyDocument. The document name is for debugging purposes only, so use whatever you want. The second parameter defines the new document's root. It must be "{" or "[". Note that this new document is now the active one and it's current element is the root of the document.
SRP_JsonX is a special routine SRP_JsonX is a special routine whose parameters are interpreted according to the current state. The comments above help explain how SRP_JsonX makes its decisions.
To get the final json output, we call called SRP_JsonX_End. This routine does two things. It optionally returns the current document as a json string, then it removes the current document from memory and makes the previous document on the stack the current one.
Let's look at another example.
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SRP_JsonX_BeginString('MyDocument', '{', JsonxPretty$)
SRP_JsonX('employees', '[')
SRP_JsonX('{')
SRP_JsonX('firstname', 'John')
SRP_JsonX('lastname', 'Doe')
SRP_JsonX('age', 21)
SRP_JsonX('}')
SRP_JsonX('{')
SRP_JsonX('firstname', 'Anna')
SRP_JsonX('lastname', 'Smith')
SRP_JsonX('age', 32)
SRP_JsonX('}')
SRP_JsonX('{"firstname":"Peter", "lastname":"Jones", "age":43}')
SRP_JsonX(']')
SRP_JsonX('count', 4)
SRP_JsonX('active', 1, 'Bool')
SRP_JsonX('alwaysnull')
SRP_JsonX('alwaysstring', 4.321, 'String')
Json = SRP_JsonX_End() |
Example 2 makes the same json as Example 1, but this time we started with SRP_JsonX_BeginString. Note how the calls to SRP_JsonX don't behave any differently. The only difference is that behind the scenes, SRP JsonX is producing pretty json text directly. If you know you are making a json string and you plan to build it from the top down, then SRP_JsonX_BeginString will be a little faster.
Parsing Json
SRP JsonX is the fastest parser available to OI developers, and now it's easier to navigate, modify, and extract json documents thanks to the elimination of cumbersome handles. Let's parse the following json:
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