com.google.gwt.lang

Class Runtime

java.lang.Object

com.google.gwt.lang.Runtime

public class Runtime
extends Object

Utility class that provides methods for dealing with the runtime representation of Java classes and bootstraping code.

Constructor Summary

Constructors

Constructor and Description
Runtime()

Method Summary

Modifier and Type	Method and Description
static void	bootstrap() Called at the beginning to setup required structures before any of the classes is defined.
static void	copyObjectProperties(JavaScriptObject from, JavaScriptObject to)
static void	defineClass(JavaScriptObject typeId, JavaScriptObject superTypeIdOrPrototype, JavaScriptObject castableTypeMap) If not already created it creates the prototype for the class and stores it in prototypesByTypeId.
static JavaScriptObject	getClassPrototype(JavaScriptObject typeId) Retrieves the prototype for a type if it exists, null otherwise.
static JavaScriptObject	makeLambdaFunction(JavaScriptObject samMethod, JavaScriptObject ctor, JavaScriptObject ctorArguments) Create a function that applies the specified samMethod on itself, and whose __proto__ points to instance.
static JavaScriptObject	provide(JavaScriptObject namespace, JavaScriptObject optCtor) Creates a JS namespace to attach exported classes to.
static String	toString(Object object)

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Constructor Detail

Runtime

public Runtime()

Method Detail

defineClass

public static void defineClass(JavaScriptObject typeId,
                               JavaScriptObject superTypeIdOrPrototype,
                               JavaScriptObject castableTypeMap)

If not already created it creates the prototype for the class and stores it in prototypesByTypeId. If superTypeIdOrPrototype is null, it means that the class being defined is the topmost class (i.e. java.lang.Object) and creates an empty prototype for it. Otherwise it creates the prototype for the class by calling createSubclassPrototype(). It also assigns the castable type map and sets the constructors prototype field to the current prototype. Finally adds the class literal if it was created before the call to defineClass. Class literals might be created before the call to defineClass if they are in separate code-split fragments. In that case Class.createFor* methods will have created a placeholder and stored in prototypesByTypeId the class literal.

As a prerequisite if superTypeIdOrPrototype is not null, it is assumed that defineClass for the supertype has already been called.

This method has the effect of assigning the newly created prototype to the global temp variable '_'.

copyObjectProperties

public static void copyObjectProperties(JavaScriptObject from,
                                        JavaScriptObject to)

provide

public static JavaScriptObject provide(JavaScriptObject namespace,
                                       JavaScriptObject optCtor)

Creates a JS namespace to attach exported classes to.

Parameters:

namespace - a dotted js namespace string

Returns:

a nested object literal representing the namespace

makeLambdaFunction

public static JavaScriptObject makeLambdaFunction(JavaScriptObject samMethod,
                                                  JavaScriptObject ctor,
                                                  JavaScriptObject ctorArguments)

Create a function that applies the specified samMethod on itself, and whose __proto__ points to instance.

bootstrap

public static void bootstrap()

Called at the beginning to setup required structures before any of the classes is defined. The code written in and invoked by this method should be plain JavaScript.

getClassPrototype

public static JavaScriptObject getClassPrototype(JavaScriptObject typeId)

Retrieves the prototype for a type if it exists, null otherwise.

toString

public static String toString(Object object)