lazy-map.iop

Turn arbitrary Java objects into lazy maps, see extend-lazy-map.

enum-to-keyword

(enum-to-keyword enum)

Return a keyword representation of an Enum object. Lowercase the Enum’s name and replace _ with -.

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extend-lazy-map

macro

(extend-lazy-map class & {:keys [exclude post-fns keyname allow-impure catch-exceptions]})

Extend to-lazy-map for converting an object of class. This macro must be used once on the class name, such as: (extend-lazy-map String).

From then on, the to-lazy-map function can be used to convert an object of that class to a lazy map, where each entry correponds to a method call. Since everything is lazy, you can rest assured the methods won’t actually be called until you use them. The map keys are keywords generated from the method names with symbol-to-keyword.

For instance:

user> (to-lazy-map "My Own Map!")
{:to-char-array #<LazyVal lazy_map.core.LazyVal@7da41d83>,
 :empty?        #<LazyVal lazy_map.core.LazyVal@46e7f2eb>,
 :to-string     #<LazyVal lazy_map.core.LazyVal@1b155784>,
 :intern        #<LazyVal lazy_map.core.LazyVal@63f1f826>,
 :chars         #<LazyVal lazy_map.core.LazyVal@3e64b9de>,
 :class         #<LazyVal lazy_map.core.LazyVal@47ed7453>,
 :length        #<LazyVal lazy_map.core.LazyVal@76f5a25d>,
 :trim          #<LazyVal lazy_map.core.LazyVal@1a29446d>,
 :bytes         #<LazyVal lazy_map.core.LazyVal@118a4bf>,
 :code-points   #<LazyVal lazy_map.core.LazyVal@2d7b1723>,
 :to-lower-case #<LazyVal lazy_map.core.LazyVal@76c7af9b>,
 :hash-code     #<LazyVal lazy_map.core.LazyVal@269d9702>,
 :object        #<LazyVal lazy_map.core.LazyVal@62e4e232>,
 :to-upper-case #<LazyVal lazy_map.core.LazyVal@17533342>}

user> (:to-upper-case (to-lazy-map "My Own Map!"))
"MY OWN MAP!"

This macro also accepts a number of keyword arguments:

  • exclude is a sequence of methods to avoid (methods with non-zero arity or which return void are automatically avoided).
  • post-fns is a map from method names to functions. The function is called on the return value of that method. If the method’s return value is an Enum, then this defaults to symbol-to-keyword.
  • keyname is a map from method names to keys, these keys are used in place of the one generated by symbol-to-keyword.
  • allow-impure is a boolean. By default, methods which return void are automatically avoided. Setting this to true disables that precaution.
  • catch-exceptions is a boolean which indicates to catch and discard any exceptions thrown by the methods (and return nil).
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symbol-to-keyword

(symbol-to-keyword method)

Convert a method or field name to a keyword. If the name starts with “is”, the “is” is removed and a “?” is appended to the end. If the name starts with “get”, the “get” is removed.

Examples: toString :to-string isPerson :person? hasKindness :has-kindness getPrice :price

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ToLazyMap

protocol

Turn argument to a LazyMap. Just Return it if already a map (lazy or otherwise).

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to-lazy-map

(to-lazy-map o)

Convert a Java object to a lazy map, where each entry corresponds to a method call.

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