Class: Mirah::JVM::Types::TypeFactory

Inherits:
SimpleTypes
  • Object
show all
Includes:
Logging::Logged, TypeSystem
Defined in:
lib/mirah/jvm/types/factory.rb,
lib/mirah/jvm/types/basic_types.rb

Defined Under Namespace

Classes: ParanoidHash

Constant Summary

Constants included from Logging::Logged

Logging::Logged::VLEVELS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging::Logged

#error, #info, #log, #logger, #logger_name, #logging?, #vlog, #warning

Constructor Details

#initialize ⇒ TypeFactory

Returns a new instance of TypeFactory.



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# File 'lib/mirah/jvm/types/factory.rb', line 58

def initialize
  super(":unused")
  @known_types = ParanoidHash.new
  @anonymous_classes = Hash.new {|h, k| h[k] = 0}
  @declarations = []
  @mirrors = {}
  @futures = {}
  @fields = {}
  create_basic_types
end

Instance Attribute Details

#bootclasspath ⇒ Object

Returns the value of attribute bootclasspath.



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# File 'lib/mirah/jvm/types/factory.rb', line 762

def bootclasspath
  @bootclasspath
end

#known_types ⇒ Object (readonly)

Returns the value of attribute known_types.



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# File 'lib/mirah/jvm/types/factory.rb', line 49

def known_types
  @known_types
end

#package ⇒ Object

Returns the value of attribute package.



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# File 'lib/mirah/jvm/types/factory.rb', line 48

def package
  @package
end

Instance Method Details

#_build_generic_type_future(bounds, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 353

def _build_generic_type_future(bounds, position)
  typeName = "java.lang.Object"
  if bounds.size > 1
    raise ArgumentError, "Multiple bounds on type variables are not supported."
  elsif bounds.size == 1
    typeName = bounds[0].raw_type.getClassName
  end
  GenericTypeFuture.new(position, type(nil, typeName))
end

#_declare_method(target, name, args, type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 460

def _declare_method(target, name, args, type)
  return if args.any? {|a| a.isError }
  return unless type.kind_of?(MethodFuture) && type.returnType.isResolved
  resolved = type.returnType.resolve
  resolved = resolved.returnType if resolved.respond_to?(:returnType)
  log "Learned {0} method {1}.{2}({3}) = {4}", [
          target.meta? ? "static" : "instance",
          target.full_name,
          name,
          args.map{|a| a.full_name}.join(', '),
          resolved.full_name].to_java
  rewritten_name = name.sub(/=$/, '_set')
  if target.meta?
    target.unmeta.declare_static_method(rewritten_name, args, resolved, [])
  else
    target.declare_method(rewritten_name, args, resolved, [])
  end      
end

#_find_method_type(scope, target, name, argTypes, macroTypes, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 271

def _find_method_type(scope, target, name, argTypes, macroTypes, position)
  if target.respond_to?(:isError) && target.isError
    return target
  end
  type = BaseTypeFuture.new(nil)
  target.find_method2(target, name, argTypes, macroTypes, target.meta?, scope) do |method|
    if method.nil?
      unless argTypes.any?{|t| t && t.isError && (type.resolved(t); true)}
        type.resolved(ErrorType.new([
            ["Cannot find %s method %s(%s) on %s" %
                [ target.meta? ? "static" : "instance",
                  name,
                  argTypes.map{|t| t ? t.full_name : "?"}.join(', '),
                  target.full_name], position]]))
      end
    elsif method.kind_of?(Exception)
      type.resolved(ErrorType.new([[method.message, position]]))
    else
      result = method.return_type

      # Handle generics.
      begin
        if name == 'new' and target.type_parameters
          result = Mirah::JVM::Types::GenericType.new(result) # Upgrade to a generic type.
          target.type_parameters.each do |var|
            result.type_parameter_map.put(var.name, _build_generic_type_future(var.bounds, position))
          end

          genericParameterTypes = method.member.generic_parameter_types
          if genericParameterTypes
            genericParameterTypes.each_index do |i|
              _handle_nested_generic_parameter(genericParameterTypes[i], argTypes[i], result.type_parameter_map, position)
            end
          end
        elsif target.generic? && method.respond_to?(:member)
          genericParameterTypes = method.member.generic_parameter_types
          if genericParameterTypes
            genericParameterTypes.each_index do |i|
              _handle_nested_generic_parameter(genericParameterTypes[i], argTypes[i], target.type_parameter_map, position)
            end
          end

          result = _handle_nested_generic_return(result, method.member.generic_return_type, target.type_parameter_map, position)
          result.resolve if result.respond_to?(:resolve)
        end
      rescue => ex
        Mirah.print_error("Error inferring generics: #{ex.message}", position)
        log("Error inferring generics: #{ex.message}\n#{ex.backtrace.join("\n")}")
        result = method.return_type
      end

      if result.kind_of?(TypeFuture)
        if result.isResolved
          type.resolved(result.resolve)
        else
          result.onUpdate {|x, resolved| type.resolved(resolved) }
        end
      else
        type.resolved(result)
      end

      # TODO(shepheb): This is modifying the argTypes of _find_method_type, and it shouldn't be.
      # Moved to the bottom so the generics code above can access the original argTypes that were passed to _find_method_type.
      argTypes = method.argument_types
    end
  end
  argTypes = argTypes.map do |t|
    if t.nil?
      t
    elsif t.isBlock
      type.position_set(position) if (position && type.position.nil?)
      # This should only happen if type is an error.
      type.resolve
    else
      t
    end
  end
  return_type = AssignableTypeFuture.new(nil)
  return_type.assign(type, position)
  MethodFuture.new(name, argTypes, return_type, false, position)
end

#_handle_nested_generic_parameter(expectedType, providedType, type_parameter_map, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 363

def _handle_nested_generic_parameter(expectedType, providedType, type_parameter_map, position)
  if expectedType.kind_of?(BiteScript::ASM::TypeVariable)
    gtf = type_parameter_map.get(expectedType.name)
    gtf.assign(SimpleFuture.new(providedType), position)
  elsif expectedType.kind_of?(BiteScript::ASM::Wildcard) && providedType.kind_of?(TypeFuture)
    # TODO(shepheb): Handle bounds here.
    gtf = type_parameter_map.get(expectedType.upper_bound.name)
    gtf.assign(providedType, position)
  elsif expectedType.kind_of?(BiteScript::ASM::ParameterizedType)
    # We can assume assignable_from? here, or this method would not have been called.
    expectedParameters = expectedType.type_arguments
    # Look up the values of the provided type's parameters.
    providedParameters = providedType.type_parameters.map do |var|
      if providedType.generic?
        providedType.type_parameter_map.get(var.name)
      else
        type_parameter_map.get(var.name)
      end
    end

    if expectedParameters && providedParameters && expectedParameters.size == providedParameters.size
      expectedParameters.each_index do |i|
        _handle_nested_generic_parameter(expectedParameters[i], providedParameters[i], type_parameter_map, position)
      end
    else
      raise ArgumentError, "Type parameter mismatch: Expected #{expectedParameters}, found #{providedParameters}."
    end
  end
end

#_handle_nested_generic_return(returnType, genericReturnType, type_parameter_map, position) ⇒ Object

TODO(shepheb): Handles only one level of nesting, it should handle arbitrary depth by recursion.



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# File 'lib/mirah/jvm/types/factory.rb', line 394

def _handle_nested_generic_return(returnType, genericReturnType, type_parameter_map, position)
  if genericReturnType.kind_of?(BiteScript::ASM::TypeVariable)
    type_parameter_map.get(genericReturnType.name)
  elsif genericReturnType.kind_of?(BiteScript::ASM::ParameterizedType)
    returnType = GenericType.new(returnType)
    expectedTypeParameters = returnType.jvm_type.type_parameters
    providedTypeParameters = genericReturnType.type_arguments
    if expectedTypeParameters && providedTypeParameters && expectedTypeParameters.size == providedTypeParameters.size
      expectedTypeParameters.each_index do |i|
        returnType.type_parameter_map.put(expectedTypeParameters[i].name, type_parameter_map.get(providedTypeParameters[i].name))
      end
    else
      raise ArgumentError, "Type parameter mismatch: Expected #{expectedTypeParameters}, found #{providedTypeParameters}"
    end
    returnType
  else
    returnType
  end
end

#addDefaultImports(scope) ⇒ Object

TypeSystem methods



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# File 'lib/mirah/jvm/types/factory.rb', line 113

def addDefaultImports(scope)
  scope.import('java.lang.*', '*')
end

#addMacro(klass, macro) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 515

def addMacro(klass, macro)
  klass.unmeta.add_compiled_macro(macro)
end

#base_classpath ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 715

def base_classpath
  if __FILE__.include? '.jar'
    Mirah::Env.encode_paths([__FILE__.split('!').first.split(Mirah::Env.path_separator).last])
  else
    Mirah::Env.encode_paths(['.',
                             File.dirname(__FILE__) + '/../../../../javalib/mirah-builtins.jar',
                             File.dirname(__FILE__) + '/../../../../javalib/mirah-parser.jar',
                             File.dirname(__FILE__) + '/../../../../javalib/mirah-bootstrap.jar'])
  end
end

#basic_type(scope, name) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/mirah/jvm/types/factory.rb', line 572

def basic_type(scope, name)
  if name.kind_of?(Type) || name.kind_of?(NarrowingType)
    return name.basic_type
  end
  orig = name
  if name.kind_of? Java::JavaClass
    #TODO is is possible to get here anymore?
    if name.array?
      return type(scope, name.component_type, true)
    else
      name = name.name
    end
  elsif name.respond_to? :java_class
    name = name.java_class.name
  end
  name = name.to_s unless name.kind_of?(::String)
  raise ArgumentError, "Bad Type #{orig}" if name =~ /Java::/
  raise ArgumentError, "Bad Type #{orig.inspect}" if name == '' || name.nil?
  find_type(scope, name)
end

#bootstrap_loader ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 741

def bootstrap_loader
  @bootstrap_loader ||= begin
    parent = if bootclasspath
               Mirah::Util::IsolatedResourceLoader.new(Mirah::Env.make_urls(bootclasspath))
             end
    if __FILE__ =~ /^(file:.+jar)!/
      bootstrap_urls = [java.net.URL.new($1)].to_java(java.net.URL)
    else
      bootstrap_jar = File.expand_path("#{__FILE__}/../../../../../javalib/mirah-bootstrap.jar")
      bootstrap_urls = [java.io.File.new(bootstrap_jar).to_uri.to_url].to_java(java.net.URL)
    end
    URLClassLoader.new(bootstrap_urls, parent)
  end
end

#box(type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 187

def box(type)
  boxed = BaseTypeFuture.new(nil)
  type.on_update do |_, resolved|
    if resolved.isError || !resolved.primitive?
      boxed.resolved(resolved)
    else
      boxed.resolved(resolved.box_type)
    end
  end
  boxed
end

#cache_and_wrap(resolved_type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 99

def cache_and_wrap(resolved_type)
  @futures[resolved_type.name] ||= wrap(resolved_type)
end

#cache_and_wrap_type(name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 103

def cache_and_wrap_type(name)
  @futures[name] ||= begin
    type = type(nil, name)
    wrapper = wrap(type)
    wrapper.resolved(ErrorType.new([["Cannot find class #{name}"]])) if type.nil?
    wrapper
  end
end

#classpath ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 726

def classpath
  @classpath ||= base_classpath
end

#classpath=(classpath) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 730

def classpath=(classpath)
  if classpath
    @classpath = Mirah::Env.encode_paths [classpath, base_classpath]
  end
  @resource_loader = nil
end

#create_basic_types ⇒ Object 



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# File 'lib/mirah/jvm/types/basic_types.rb', line 18

def create_basic_types
  @known_types.update(
    'boolean' => BooleanType.new(self, 'boolean', java.lang.Boolean),
    'byte' => IntegerType.new(self, 'byte', java.lang.Byte),
    'char' => CharacterType.new(self, 'char', java.lang.Character),
    'short' => IntegerType.new(self, 'short', java.lang.Short),
    'int' => IntegerType.new(self, 'int', java.lang.Integer),
    'long' => LongType.new(self, 'long', java.lang.Long),
    'float' => FloatType.new(self, 'float', java.lang.Float),
    'double' => DoubleType.new(self, 'double', java.lang.Double)
  )
  @known_types['fixnum'] = @known_types['int']
  @known_types['Object'] = type(nil, 'java.lang.Object')
  @known_types['string'] = @known_types['String'] = @known_types['java.lang.String'] =
      StringType.new(self, get_mirror('java.lang.String'))
  type(nil, 'java.lang.Class')
  @known_types['Iterable'] = @known_types['java.lang.Iterable'] =
      IterableType.new(self, get_mirror('java.lang.Iterable'))
  @known_types['void'] = VoidType.new(self)
  @known_types['null'] = NullType.new(self)
  @known_types['implicit_nil'] = ImplicitNilType.new(self)
end

#declare_type(scope, name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 658

def declare_type(scope, name)
  full_name = name
  package = scope.package
  if !name.include?('.')
    if package && !package.empty?
      full_name = "#{package}.#{name}"
    else
      scope.on_package_change do
        full_name = "#{scope.package}.#{name}"
        scope.import(full_name, name)
        @known_types[full_name] = @known_types[name]
      end
    end
  end
  if @known_types.include? full_name
    @known_types[full_name]
  else
    scope.import(full_name, name)
    @known_types[full_name] = TypeDefinition.new(self, scope, full_name, nil)
  end
end

#define_type(scope, node) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 680

def define_type(scope, node)
  if node.name.nil?
    outer_node = node.find_ancestor {|n| (n != node && n.kind_of?(ClassDefinition)) || n.kind_of?(Script)}
    if outer_node.kind_of?(ClassDefinition)
      outer_name = outer_node.name.identifier
    else
      outer_name = Mirah::JVM::Compiler::JVMBytecode.classname_from_filename(node.position.source.name || 'DashE')
    end
    id = (@anonymous_classes[outer_name] += 1)
    node.name_set(SimpleString.new("#{outer_name}$#{id}"))
  end
  name = node.name.identifier
  full_name = name
  package = scope.package
  if !name.include?('.') && package && !package.empty?
    full_name = "#{package}.#{name}"
  end
  if @known_types.include?(full_name) && @known_types[full_name].kind_of?(TypeDefinition)
    existing = @known_types[full_name]
    unless existing.node
      existing.node = node
      existing.scope = scope
    end
    existing
  else
    if InterfaceDeclaration === node
      klass = InterfaceDefinition
    else
      klass = TypeDefinition
    end
    scope.import(full_name, name)
    @known_types[full_name] = klass.new(self, scope, full_name, node)
  end
end

#define_types(builder) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 550

def define_types(builder)
  @declarations.each do |declaration|
    declaration.define(builder)
  end
end

#defineType(scope, node, name, superclass, interfaces) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 498

def defineType(scope, node, name, superclass, interfaces)
  # TODO what if superclass or interfaces change later?
  log("Defining type #{name} < #{superclass.resolve.name if superclass} #{interfaces.map{|i|i.resolve.name}.inspect}")
  type = define_type(scope, node)
  future = @futures[type.name]
  if future
    future.resolved(type)
    future
  else
    cache_and_wrap(type)
  end
rescue => ex
  Mirah.print_error("Error defining type #{name}: #{ex.message}", node.position)
  puts ex.backtrace.join("\n\t")
  ErrorType.new([["Internal error: #{ex}", node.position]])
end

#extendClass(classname, extensions) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 519

def extendClass(classname, extensions)
  get_type(classname).load_extensions(extensions)
end

#find_type(scope, name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 593

def find_type(scope, name)
  type = get_type(name)
  return type if type

  if scope
    imports = scope.imports
    if imports.include?(name)
      name = imports[name] while imports.include?(name)
      type = get_type(name)
      return type if type
    end

    # TODO support inner class names
    if name !~ /\./
      return package_search(name, scope)
    end
  end
  return nil
end

#get(scope, typeref) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 225

def get(scope, typeref)
  basic_type = if scope.nil?
    cache_and_wrap_type(typeref.name)
  else
    imports = scope.imports
    name = typeref.name
    name = imports[name] while imports.include?(name)
    types = [ cache_and_wrap_type(name), nil ]
    packages = []
    packages << scope.package if scope.package && scope.package != ''
    (packages + scope.search_packages).each do |package|
      types << cache_and_wrap_type("#{package}.#{name}")
      types << nil
    end

    future = PickFirst.new(types, nil)
    future.position_set(typeref.position)
    future.error_message_set("Cannot find class #{typeref.name}")
    future
  end
  if typeref.isArray
    getArrayType(basic_type)
  elsif typeref.isStatic
    getMetaType(basic_type)
  else
    basic_type
  end
end

#get_mirror(name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 776

def get_mirror(name)
  @mirrors[name] ||= begin
    classname = name.tr('.', '/')
    stream = resource_loader.getResourceAsStream(classname + ".class")
    if stream
      mirror = BiteScript::ASM::ClassMirror.load(stream)
      mirror if mirror.type.class_name == name
    else
      # TODO(ribrdb) Should this use a separate sourcepath?
      url = resource_loader.getResource(classname + ".java")
      if url
        file = java.io.File.new(url.toURI)
        mirrors = JavaSourceMirror.load(file, self) rescue []
        mirrors.each do |mirror|
          @mirrors[mirror.type.class_name] = mirror
        end if mirrors
        @mirrors[name]
      end
    end
  end
end

#get_type(full_name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 630

def get_type(full_name)
  type = @known_types[full_name]
  return type.basic_type if type
  mirror = get_mirror(full_name)
  unless mirror
    if full_name =~ /^(.+)\.([^.]+)/
      outer_name = $1
      inner_name = $2
      outer_type = get_type(outer_name)
      return nil unless outer_type
      full_name = "#{outer_type.name}$#{inner_name}"
      mirror = get_mirror(full_name)
      return nil unless mirror
    else
      return nil
    end
  end
  type = Type.new(self, mirror).load_extensions
  if full_name.include? '$'
    @known_types[full_name.gsub('$', '.')] = type
  end
  @known_types[full_name] = type
end

#getAbstractMethods(type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 798

def getAbstractMethods(type)
  methods = []
  unless type.isError
    object = get_type("java.lang.Object")
    interfaces = [type]
    until interfaces.empty?
      interface = interfaces.pop
      abstract_methods = interface.declared_instance_methods.select {|m| m.abstract?}
      methods += abstract_methods.select do |m|
        begin
          # Skip methods defined on Object
          object.java_method(m.name, *m.argument_types)
          false
        rescue NameError
          true
        end
      end
      interfaces.concat(interface.interfaces)
    end
    # TODO ensure this works with hierarchies of abstract classes
    # reject the methods implemented by the abstract class
    if type.abstract?
      implemented_methods = type.declared_instance_methods.reject{|m| m.abstract?}.map { |m| [m.name, m.argument_types, m.return_type] }
      methods = methods.reject{|m| implemented_methods.include? [m.name, m.argument_types, m.return_type] }
    end
  end
  methods.map do |method|
    MethodType.new(method.name, method.argument_types, method.return_type, false)
  end
end

#getArrayLiteralType(type, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 199

def getArrayLiteralType(type, position)
  result = Mirah::JVM::Types::GenericType.new(type(nil, 'java.util.List')) # Upgrade to a generic type.
  variable = result.type_parameters[0]
  result.type_parameter_map[variable.name] = _build_generic_type_future(variable.bounds, position)
  result.type_parameter_map[variable.name].assign(box(type), position)
  wrap(result)
rescue => ex
  Mirah.print_error("Error inferring generics: #{ex.message}", position)
  log("Error inferring generics: #{ex.message}\n#{ex.backtrace.join("\n")}")
  cache_and_wrap_type('java.util.List')
end

#getArrayType(type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 177

def getArrayType(type)
  if type.kind_of?(Type)
    type.array_type
  else
    future = BaseTypeFuture.new(nil)
    type.on_update {|_, resolved| future.resolved(resolved.array_type)}
    future
  end
end

#getBaseExceptionType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 120

def getBaseExceptionType; cache_and_wrap_type('java.lang.Throwable') end

#getBlockType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 626

def getBlockType
  @block_type ||= BlockType.new
end

#getBooleanType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 125

def getBooleanType; cache_and_wrap_type('boolean') end

#getCharType(value) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 144

def getCharType(value) cache_and_wrap_type('char') end

#getDefaultExceptionType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 121

def getDefaultExceptionType; cache_and_wrap_type('java.lang.Exception') end

#getFieldType(target, name, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 479

def getFieldType(target, name, position)
  # This is currently only used for fields in the current class
  klass = target.resolve
  key = [klass, name]
  t = @fields[key]
  unless t
    t = AssignableTypeFuture.new(position)
    @fields[key] = t
    t.on_update {|x, resolved| klass.unmeta.declare_field(name, resolved, klass.meta?)}
  end
  t
end

#getFixnumType(value) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 127

def getFixnumType(value)
  long = java.lang.Long.new(value)
  if long.int_value != value
    cache_and_wrap_type('long')
  elsif long.short_value != value
    cache_and_wrap_type('int')
  elsif long.byte_value != value
    wide = type(nil, 'int')
    narrow = type(nil, 'short')
    NarrowingTypeFuture.new(nil, wide, narrow)
  else
    wide = type(nil, 'int')
    narrow = type(nil, 'byte')
    NarrowingTypeFuture.new(nil, wide, narrow)
  end
end

#getFloatType(value) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 146

def getFloatType(value)
  d = java.lang.Double.new(value)
  if d.float_value != value
    cache_and_wrap_type('double')
  else
    wide = type(nil, 'double')
    narrow = type(nil, 'float')
    NarrowingTypeFuture.new(nil, wide, narrow)
  end
end

#getHashLiteralType(key_type, value_type, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 211

def getHashLiteralType(key_type, value_type, position)
  result = Mirah::JVM::Types::GenericType.new(type(nil, 'java.util.HashMap')) # Upgrade to a generic type.
  generic_key, generic_value = result.type_parameters
  for variable, type in [[generic_key, key_type], [generic_value, value_type]]
    result.type_parameter_map[variable.name] = _build_generic_type_future(variable.bounds, position)
    result.type_parameter_map[variable.name].assign(box(type), position)
  end
  wrap(result)
rescue => ex
  Mirah.print_error("Error inferring generics: #{ex.message}", position)
  log("Error inferring generics: #{ex.message}\n#{ex.backtrace.join("\n")}")
  cache_and_wrap_type('java.util.HashMap')
end

#getHashType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 122

def getHashType; cache_and_wrap_type('java.util.HashMap') end

#getImplicitNilType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 118

def getImplicitNilType; cache_and_wrap_type('implicit_nil') end

#getLocalType(scope, name, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 254

def getLocalType(scope, name, position)
  scope.local_type(name, position)
end

#getMainType(scope, script) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 492

def getMainType(scope, script)
  filename = File.basename(script.position.source.name || 'DashE')
  classname = Mirah::JVM::Compiler::JVMBytecode.classname_from_filename(filename)
  getMetaType(cache_and_wrap(declare_type(scope, classname)))
end

#getMetaType(type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 157

def getMetaType(type)
  if type.kind_of?(Type)
    type.meta
  else
    future = BaseTypeFuture.new(nil)
    type.on_update {|_, resolved| future.resolved(resolved.meta)}
    future.position_set(type.position)
    future.error_message_set(type.error_message)
    future
  end
end

#getMethodDefType(target, name, argTypes, returnType, position) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 414

def getMethodDefType(target, name, argTypes, returnType, position)
  if target.nil?
    return ErrorType.new([["No target", position]])
  end
  unless argTypes.all? {|a| a.hasDeclaration}
    infer_override_args(target, name, argTypes)
  end
  if returnType.nil?
    returnType = infer_override_return_type(target, name, argTypes)
  end

  args = argTypes.map {|a| a.resolve}
  target = target.resolve
  type = _find_method_type(nil, target, name, args, nil, position)
  type.onUpdate do |m, resolved|
    _declare_method(target, name, args, type)
  end

  args.each_with_index do |arg, i|
    if arg.isError
      argTypes[i].onUpdate do |x, resolved|
        args[i] = resolved
        _declare_method(target, name, args, type)
      end
    end
  end

  if type.kind_of?(ErrorType)
    puts "Got error type for method #{name} on #{target.resolve} (#{target.resolve.class})"
    position = type.position rescue nil
    return_type = AssignableTypeFuture.new(position)
    return_type.declare(type, position)
    type = MethodFuture.new(name, args, return_type, false, position)
  elsif returnType
    type.returnType.declare(returnType, position)
  end

  type.to_java(MethodFuture)
rescue => ex
  target_name = target.respond_to?(:name) ? target.name : target.resolve.name
  error("Error getting method def type #{target_name}.#{name}: #{ex.message}\n#{ex.backtrace.join("\n\t")}")
  return_type = AssignableTypeFuture.new(nil)
  return_type.declare(ErrorType.new([["Internal error: #{ex}"]]), nil)
  MethodFuture.new(name, [], return_type, false, nil)
end

#getMethodType(call) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 258

def getMethodType(call)
  target = call.resolved_target
  argTypes = call.resolved_parameters
  macro_types = call.parameter_nodes.map do |node|
    get_type(node.java_class.name)
  end if call.parameter_nodes
  _find_method_type(call.scope, target, call.name, argTypes, macro_types, call.position)
rescue => ex
  Mirah.print_error("Error getting method type #{target.name}.#{call.name}: #{ex.message}", call.position)
  puts ex.backtrace.join("\n\t")
  ErrorType.new([["Internal error: #{ex}", call.position]])
end

#getNullType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 117

def getNullType; cache_and_wrap_type('null') end

#getRegexType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 123

def getRegexType; cache_and_wrap_type('java.util.regex.Pattern') end

#getStringType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 124

def getStringType; cache_and_wrap_type('java.lang.String') end

#getSuperClass(future) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 169

def getSuperClass(future)
  superclass = BaseTypeFuture.new(nil)
  future.on_update do |_, type|
    superclass.resolved(type.superclass)
  end
  superclass
end

#getVoidType ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 119

def getVoidType; cache_and_wrap_type('void') end

#infer_override_args(target, name, arg_types) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 523

def infer_override_args(target, name, arg_types)
  # TODO What if the method we're overriding hasn't been inferred yet?
  log("Infering argument types for #{name}")
  by_name = target.resolve.find_callable_methods(name, true)
  by_name_and_arity = by_name.select {|m| m.argument_types.size == arg_types.size}
  filtered_args = Set.new(by_name_and_arity.map {|m| m.argument_types})
  if filtered_args.size == 1
    arg_types.zip(filtered_args.first).each do |arg, super_arg|
      arg.declare(cache_and_wrap(super_arg), arg.position)
    end
  else
    log("Found method types:")
    filtered_args.each {|args| log("  #{args.map{|a|a.full_name}.inspect}")}
    arg_types.each {|arg| arg.declare(ErrorType.new([["Missing declaration"]]), nil)}
  # TODO else give a more useful error?
  end
end

#infer_override_return_type(target, name, arg_types) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 541

def infer_override_return_type(target, name, arg_types)
  by_name = target.resolve.find_callable_methods(name, true)
  by_name_and_arity = {}
  by_name.each {|m| by_name_and_arity[m.argument_types] = m if m.argument_types.size == arg_types.size }
  resolved_args = arg_types.map {|a| a.resolve}
  match = by_name_and_arity[resolved_args]
  return cache_and_wrap(match.return_type) if match
end

#initialize_copy(other) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 69

def initialize_copy(other)
  @known_types = other.known_types.dup
  @known_types.delete_if do |key, value|
    value.basic_type.kind_of?(Mirah::JVM::Types::TypeDefinition)
  end
  @declarations = []
  @futures = {}
  @fields = {}
end

#known_type(scope, name) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 654

def known_type(scope, name)
  basic_type(scope, name)
end

#maybe_initialize_builtins(compiler) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 79

def maybe_initialize_builtins(compiler)
  if Builtins
    begin
      Builtins.initialize_builtins(compiler.type_system)
    rescue NativeException => ex
      error("Error initializing builtins", ex.cause)
    rescue => ex
      error("Error initializing builtins: #{ex.message}\n\t#{ex.backtrace.join("\n\t")}")
    end
  else
    warning "Unable to initialize builtins"
  end
end

#mirror_class(klass) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 764

def mirror_class(klass)
  name = klass.name.tr('.', '/')
  if klass.respond_to?(:resource_as_stream)
    stream = klass.resource_as_stream("/#{name}.class")
  elsif klass.respond_to?(:get_resource_as_stream)
    stream = klass.get_resource_as_stream("/#{name}.class")
  else
    return get_mirror(klass.name)
  end
  BiteScript::ASM::ClassMirror.load(stream)
end

#package_search(name, scope) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 613

def package_search(name, scope)
  packages = []
  current_package = scope.package
  packages << current_package unless current_package.nil? || current_package.empty?
  packages.concat(scope.search_packages)
  packages << 'java.lang'
  packages.each do |package|
    type =  get_type("#{package}.#{name}")
    return type if type
  end
  return nil
end

#resource_loader ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 737

def resource_loader
  @resource_loader ||= URLClassLoader.new(Mirah::Env.make_urls(classpath), bootstrap_loader)
end

#type(scope, name, array = false, meta = false) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 556

def type(scope, name, array=false, meta=false)
  if name.kind_of?(BiteScript::ASM::Type)
    if name.getDescriptor[0] == ?[
      return type(scope, name.getElementType, true, meta)
    else
      name = name.getClassName
    end
  elsif name.kind_of?(Type) && name.array?
    array = true
  end
  type = basic_type(scope, name)
  type = type.array_type if type && array
  type = type.meta if type && meta
  return type
end

#wrap(resolved_type) ⇒ Object 



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# File 'lib/mirah/jvm/types/factory.rb', line 93

def wrap(resolved_type)
  future = BaseTypeFuture.new(nil)
  future.resolved(resolved_type) if resolved_type
  future
end