Sha256: 5865ce220fc0010a681e9b772e01ac0e505d3f8d982dd042e3bde07f28796f00
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Size: 969 Bytes
Versions: 13
Compression:
Stored size: 969 Bytes
Contents
require 'caruby/util/collection'
module CaRuby
# A WeakHash associates a key with a value until the key and value are no longer referenced elsewhere.
#
# The key and value must each be a jRuby wrapper for a Java object, i.e. a Ruby primitive such as String
# or Integer, or an instance of a Java class imported into jRuby.
class WeakHash
include Hashable
# Creates a new WeakHash.
def initialize
super
@map = Java::JavaUtil::WeakHashMap.new
end
def each
@map.each { |key, wref| yield(key, wref.get) }
end
# Returns the
def [](key)
# the weak reference mapped by the key
wref = @map.get(key)
# the referenced object
wref.get if wref
end
def []=(key, value)
# make a weak reference to the value
wref = Java::JavaLangRef::WeakReference.new(value)
# associate the object identifier with the weak reference
@map.put(key, wref)
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems