com.google.gwt.dev.shell.rewrite

Class HostedModeClassRewriter

java.lang.Object

com.google.gwt.dev.shell.rewrite.HostedModeClassRewriter

public class HostedModeClassRewriter
extends Object

This class performs any and all byte code rewriting needed to make hosted mode work. Currently, it performs the following rewrites:

1. Rewrites all native methods into non-native thunks to call JSNI via JavaScriptHost.
2. Rewrites all JSO types into an interface type (which retains the original name) and an implementation type (which has a $ appended).
3. All JSO interface types are empty and mirror the original type hierarchy.
4. All JSO impl types contain the guts of the original type, except that all instance methods are reimplemented as statics.
5. Calls sites to JSO types rewritten to dispatch to impl types. Any virtual calls are also made static. Static field references to JSO types reference static fields in the impl class.
6. JavaScriptObject$ implements all the interface types and is the only instantiable type.

See Also:

RewriteJsniMethods, RewriteRefsToJsoClasses, WriteJsoInterface, WriteJsoImpl

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	HostedModeClassRewriter.InstanceMethodOracle Maps instance methods to the class in which they are declared.
static interface	HostedModeClassRewriter.SingleJsoImplData Contains data about how SingleJsoImpl methods are to be dispatched.

Constructor Summary

Constructors

Constructor and Description
HostedModeClassRewriter(Set<String> jsoSubtypes, Map<String,List<String>> jsoSuperTypes, HostedModeClassRewriter.SingleJsoImplData jsoData, HostedModeClassRewriter.InstanceMethodOracle mapper) Creates a new HostedModeClassRewriter for a specified set of subclasses of JavaScriptObject.

Method Summary

Modifier and Type	Method and Description
boolean	isJsoImpl(String className) Returns true if the class is the implementation class for a JSO subtype.
boolean	isJsoIntf(String className) Returns true if the class is the interface class for a JSO subtype.
byte[]	rewrite(TypeOracle typeOracle, String className, byte[] classBytes, Map<String,String> anonymousClassMap) Performs rewriting transformations on a class.
byte[]	writeJsoIntf(String className, byte[] classBytes)

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Constructor Detail

HostedModeClassRewriter

public HostedModeClassRewriter(Set<String> jsoSubtypes,
                               Map<String,List<String>> jsoSuperTypes,
                               HostedModeClassRewriter.SingleJsoImplData jsoData,
                               HostedModeClassRewriter.InstanceMethodOracle mapper)

Creates a new HostedModeClassRewriter for a specified set of subclasses of JavaScriptObject.

Parameters:

jsoSubtypes - a set of binary type names representing JavaScriptObject and all of its subtypes of

mapper - maps methods to the class in which they are declared

Method Detail

isJsoImpl

public boolean isJsoImpl(String className)

Returns true if the class is the implementation class for a JSO subtype.

isJsoIntf

public boolean isJsoIntf(String className)

Returns true if the class is the interface class for a JSO subtype.

rewrite

public byte[] rewrite(TypeOracle typeOracle,
                      String className,
                      byte[] classBytes,
                      Map<String,String> anonymousClassMap)

Performs rewriting transformations on a class.

Parameters:

typeOracle - a typeOracle modeling the user classes

className - the name of the class

classBytes - the bytes of the class

anonymousClassMap - a map between the anonymous class names of java compiler used to compile code and jdt. Emma-specific.

writeJsoIntf

public byte[] writeJsoIntf(String className,
                           byte[] classBytes)