Class: Naether::Java::JRuby

Inherits:
Object
  • Object
show all
Defined in:
lib/naether/java/jruby.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ JRuby

Creates new instance by loading the Naether jar to the parent ClassLoader and creating the internal Naether ClassLoader



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# File 'lib/naether/java/jruby.rb', line 20

def initialize
  require 'java'
  
  naether_jar = Naether::Configuration.naether_jar
        
  @loaded_paths = []
  
  load_paths(naether_jar)  
  @class_loader = com.tobedevoured.naether.PathClassLoader.new()
  internal_load_paths(naether_jar)  
end

Instance Attribute Details

#class_loader ⇒ Object (readonly)

Returns the value of attribute class_loader.



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# File 'lib/naether/java/jruby.rb', line 14

def class_loader
  @class_loader
end

#loaded_paths ⇒ Object (readonly)

Returns the value of attribute loaded_paths.



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# File 'lib/naether/java/jruby.rb', line 14

def loaded_paths
  @loaded_paths
end

Instance Method Details

#convert_to_java_list(ruby_array) ⇒ java.util.ArrayList

Convert a Ruby Array to a java.util.ArrayList

Parameters:

  • ruby_array (Array) —

    Array to convert to Java.util.ArrayList

Returns:

  • (java.util.ArrayList) 


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# File 'lib/naether/java/jruby.rb', line 115

def convert_to_java_list( ruby_array ) 
  list = java.util.ArrayList.new
  ruby_array.each do |item|
    list.add( item )
  end
  
  list
end

#convert_to_ruby_array(java_array, to_string = false) ⇒ Array

Convert a java,util.List to a Ruby Array

Parameters:

  • java_array (java.util.ArrayList)
  • to_string (Boolean) (defaults to: false) —

    has no affect on conversion.

Returns:

  • (Array) 


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# File 'lib/naether/java/jruby.rb', line 131

def convert_to_ruby_array( java_array, to_string = false )
  java_array.to_a
end

#convert_to_ruby_hash(java_hash, to_string = false) ⇒ Hash

Convert a java.util.Map to a Ruby Hash

Parameters:

  • java_hash (java.util.Map)
  • to_string (Boolean) (defaults to: false) —

    has no affect on conversion

Returns:

  • (Hash) 


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# File 'lib/naether/java/jruby.rb', line 142

def convert_to_ruby_hash( java_hash, to_string = false )
  hash = java_hash.to_hash
  
  hash.each do |k,v|
    if v.is_a? java.util.Map
      hash[k] = convert_to_ruby_hash(v, to_string )
    end
  end
end

#create(target_class, *args) ⇒ Object

Create a Java Object from the Naether Class Loader

Parameters:

  • target_class (String) —

    to create

  • args (Array) —

    Array of constructor arguments



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# File 'lib/naether/java/jruby.rb', line 37

def create( target_class, *args )
  @class_loader.newInstance(target_class, *args )
end

#exec_static_method(target_class, target_method, params, types = nil) ⇒ Object

Execute a Staic method on a Java class from the Naether Class Loader

Parameters:

  • target_class (String)
  • target_method (String)
  • params (Array) —

    Array of method parameters

  • types (Array) (defaults to: nil) —

    if defined, a Array of String classes of params type that lines up with params one to one.

Returns:

  • (Object) 


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# File 'lib/naether/java/jruby.rb', line 49

def exec_static_method( target_class, target_method, params, types = nil ) 
  unless params.is_a? Array
    params = [params]
  end
  
  if types
    unless types.is_a? Array
       types = [types]
    end
  end
  
  @class_loader.execStaticMethod( target_class, target_method, params, types )
end

#internal_load_paths(paths) ⇒ Object

Load a path into the internal Naether ClassLoader

Parameters:

  • paths (Array) —

    as an Array of String paths or a String path



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# File 'lib/naether/java/jruby.rb', line 68

def internal_load_paths(paths)
  load_paths = []
  unless paths.is_a? Array
    paths = [paths]
  end
  
  paths.each do |path|
    expanded_path = File.expand_path(path)
    if File.exists?( expanded_path )
      @class_loader.addPath( expanded_path )
      
      load_paths << expanded_path
    end
  end
  
  load_paths
end

#load_paths(paths) ⇒ Object

Load a path onto the parent ClassLoader

Parameters:

  • paths (Array) —

    as an Array of String paths or a String path



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# File 'lib/naether/java/jruby.rb', line 91

def load_paths(paths)
  load_paths = []
  unless paths.is_a? Array
    paths = [paths]
  end
  
  paths.each do |path|
    expanded_path = File.expand_path(path)
    if !@loaded_paths.include?( expanded_path ) && File.exists?( expanded_path )
      $CLASSPATH << expanded_path
      load_paths << expanded_path
      @loaded_paths << expanded_path
    end
  end
  
  load_paths
end