Examples of org.jruby.Ruby

org.jruby.Ruby
The Ruby object represents the top-level of a JRuby "instance" in a given VM. JRuby supports spawning multiple instances in the same JVM. Generally, objects created under these instances are tied to a given runtime, for such details as identity and type, because multiple Ruby instances means there are multiple instances of each class. This means that in multi-runtime mode (or really, multi-VM mode, where each JRuby instance is a ruby "VM"), objects generally can't be transported across runtimes without marshaling. This class roots everything that makes the JRuby runtime function, and provides a number of utility methods for constructing global types and accessing global runtime structures.

    public InterfaceJavaProxy(Ruby runtime, RubyClass klazz) {
        super(runtime, klazz);
    }


    public static RubyClass createInterfaceJavaProxy(ThreadContext context) {
        Ruby runtime = context.getRuntime();
        
        RubyClass ifcJavaProxy = runtime.defineClass(
                "InterfaceJavaProxy",
                runtime.getJavaSupport().getJavaProxyClass(), new ObjectAllocator() {
            public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
                return new InterfaceJavaProxy(runtime, klazz);
            }
        });

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    public ArrayJavaProxy(Ruby runtime, RubyClass klazz) {
        super(runtime, klazz);
    }
    
    public static RubyClass createArrayJavaProxy(ThreadContext context) {
        Ruby runtime = context.getRuntime();
        
        RubyClass arrayJavaProxy = runtime.defineClass("ArrayJavaProxy",
                runtime.getJavaSupport().getJavaProxyClass(),
                new ObjectAllocator() {
            public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
                return new ArrayJavaProxy(runtime, klazz);
            }
        });
        
        RubyClass singleton = arrayJavaProxy.getSingletonClass();
        
        final DynamicMethod oldNew = singleton.searchMethod("new");
        
        singleton.addMethod("new", new ArrayNewMethod(singleton, Visibility.PUBLIC, oldNew));
        
        arrayJavaProxy.defineAnnotatedMethods(ArrayJavaProxy.class);
        arrayJavaProxy.includeModule(runtime.getEnumerable());
        
        return arrayJavaProxy;
    }

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            this.oldNew = oldNew;
        }
        
        @Override
        public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject arg0) {
            Ruby runtime = context.getRuntime();
            IRubyObject proxy = oldNew.call(context, self, clazz, "new_proxy");
            
            if (arg0 instanceof JavaArray) {
                proxy.dataWrapStruct(arg0);
                return proxy;
            } else {
                throw runtime.newTypeError(arg0, runtime.getJavaSupport().getJavaArrayClass());
            }
        }

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        DynamicMethod method_added = new JavaMethod(rubyCls.getSingletonClass(), Visibility.PUBLIC) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args, Block block) {
                RubyClass selfClass = (RubyClass)self;
                Ruby ruby = selfClass.getClassRuntime();
                String methodName = args[0].asJavaString();
                Field field = allFields.get(methodName);


                if (field == null) {
                    // do nothing, it's a non-impl method

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        DynamicMethod method_added = new JavaMethod(rubyCls.getSingletonClass(), Visibility.PUBLIC) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args, Block block) {
                RubyClass selfClass = (RubyClass)self;
                Ruby ruby = selfClass.getClassRuntime();
                String methodName = args[0].asJavaString();
                Field field = allFields.get(methodName);


                if (field == null) {
                    // do nothing, it's a non-impl method

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            return rubyCls;
        }
    }


    protected static void populateMirrorForClass(RubyModule rubyMod, final Class cls) {
        Ruby ruby = rubyMod.getRuntime();


        // set the full name
        rubyMod.setBaseName(cls.getCanonicalName());


        // include all interfaces

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            }
        });
    }


    private static void populateConstructors(RubyModule rubySing, final Class cls) {
        final Ruby ruby = rubySing.getRuntime();
        
        // add all public constructors (note: getConstructors only returns public ones)
        Constructor[] constructors = cls.getConstructors();
        for (final Constructor constructor : constructors) {
            DynamicMethod dynMethod;
            if (constructor.getParameterTypes().length == 0) {
                dynMethod = new JavaMethod.JavaMethodZero(rubySing, Visibility.PUBLIC) {
                    @Override
                    public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name) {
                        try {
                            return javaToRuby(context.getRuntime(), constructor.newInstance());
                        } catch (InstantiationException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (IllegalAccessException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (IllegalArgumentException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (InvocationTargetException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        }
                    }
                };
            } else {
                dynMethod = new JavaMethod.JavaMethodNoBlock(rubySing, Visibility.PUBLIC) {
                    @Override
                    public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] rubyArgs) {
                        Object[] args = new Object[rubyArgs.length];


                        for (int i = 0; i < args.length; i++) {
                            args[i] = rubyToJava(rubyArgs[i]);
                        }
                        try {
                            return javaToRuby(ruby, constructor.newInstance(args));
                        } catch (InstantiationException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (IllegalAccessException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (IllegalArgumentException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        } catch (InvocationTargetException ex) {
                            if (ruby.getDebug().isTrue()) ex.printStackTrace();
                            throw ruby.newTypeError("Could not instantiate " + cls.getCanonicalName() + " using " + prettyParams(constructor.getParameterTypes()));
                        }
                    }
                };
            }

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            target.addMethod(name, dynMethod);
        }
    }
    
    private static void populateSpecialMethods(RubyModule rubyMod, RubyModule rubySing, final Class cls) {
        final Ruby ruby = rubyMod.getRuntime();
        
        // add a few type-specific special methods
        rubySing.addMethod("java_class", new JavaMethod.JavaMethodZero(rubySing, Visibility.PUBLIC) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name) {

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            }
        });
    }


    private static void populateFields(RubyModule rubyMod, final Class cls) throws RaiseException, SecurityException {
        Ruby ruby = rubyMod.getRuntime();
        
        // add all static variables
        Field[] fields = cls.getDeclaredFields();
        for (Field field : fields) {
            // only public static fields that are valid constants
            if (Modifier.isStatic(field.getModifiers()) && Modifier.isPublic(field.getModifiers()) && IdUtil.isConstant(field.getName())) {
                Object value = null;
                try {
                    value = field.get(null);
                } catch (Exception e) {
                    throw ruby.newTypeError("Could not access field " + cls.getCanonicalName() + "::" + field.getName() + " using " + ci(field.getType()));
                }
                rubyMod.defineConstant(field.getName(), new JavaObjectWrapper((RubyClass) getMirrorForClass(ruby, value.getClass()), value));
            }
        }
    }

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            }
        }
    }


    protected static void populateMirrorForArrayClass(RubyModule rubyMod, Class cls) {
        final Ruby ruby = rubyMod.getRuntime();
        
        rubyMod.addMethod("[]", new JavaMethod.JavaMethodOneOrTwo(rubyMod, Visibility.PUBLIC) {
            @Override
            public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject arg) {
                Object array = rubyToJava(self);

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