blog post notes

148.rb

  $JRubyMethod["name" => ["[]", "get"], "required" => 1]
  def get(context:ThreadContext , arg:IRubyObject):IRubyObject
    getRuntime.newFixnum @buffer.get(int(longValueFromObject(arg)))
  end

hash.mirah

class Foo
  def bar
    "bar"
  end
  def baz
    {"quux" => bar}
  end
end

Foo.new.baz

hash_1.bash

]$ mirah hash.mirah 
NativeMethodAccessorImpl.java:-2:in `invoke0': java.lang.reflect.InvocationTargetException
	from NativeMethodAccessorImpl.java:39:in `invoke'
	from DelegatingMethodAccessorImpl.java:25:in `invoke'
	from Method.java:597:in `invoke'
	from NativeMethodAccessorImpl.java:-2:in `invoke0'
	from NativeMethodAccessorImpl.java:39:in `invoke'
	from DelegatingMethodAccessorImpl.java:25:in `invoke'
	from Method.java:597:in `invoke'
Caused by:
hash.mirah:1:in `main': java.lang.VerifyError: (class: Foo, method: baz signature: ()Ljava/util/HashMap;) Accessing value from uninitialized register 2
	from NativeMethodAccessorImpl.java:-2:in `invoke0'

java_method.rb

# with a string
 java.lang.String.java_class.java_method 'endsWith', 'java.lang.String'
# with a java proxy object
 java.lang.String.java_class.java_method 'endsWith', java.lang.String
# with a symbol
 java.lang.String.java_class.java_method 'charAt', :int

rake.bash

rake test:jvm TEST=test/jvm/test_annotations.rb