standard

This the standard function library for SAPL.

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standard.toString(value)

toString(value): Converts any value to a string representation.

Example:

policy "example"
permit
where
  standard.toString([1,2,3]) == "[1,2,3]";

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standard.onErrorMap(guardedExpression, fallback)

onErrorMap(guardedExpression, fallbackExpression): If evaluation of guardedExpression results in an error, the fallback is returned instead. Otherwise the result of guardedExpression is returned.

Example:

policy "example"
permit
where
  standard.onErrorMap(1/0,999) == 999;

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standard.length(Array|Text|JsonObject value)

length(ARRAY|TEXT|JSON value): For TEXT it returns the length of the text string. For ARRAY, it returns the number of elements in the array. For OBJECT, it returns the number of keys in the OBJECT. For NUMBER, BOOLEAN, or NULL, the function will return an error.

Example:

policy "example"
permit
where
  standard.length([1, 2, 3, 4]) == 4;
  standard.length("example") == 7;
  standard.length({ "key1" : 1, "key2" : 2}) == 2;

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