dima99 / gwt-streamer Goto Github PK

What steps will reproduce the problem?
Here is the simplest form of recursion:
ParentBean parent = new ParentBean();
ChildBean child = new ChildBean();
parent.setChild(child);
child.setParent(parent);
String buffer = Streamer.get().toString(parent);

StackOverflow exception occurs.

What is the expected output? What do you see instead?
Expecting parent bean can be serialized and deserialized without exception


What version of the product are you using? On what operating system?
1.0.1 , mac, Chrome browser

Please provide any additional information below.

What steps will reproduce the problem?
1. Create class A with an array of Strings
2. Create an object of A populating an array where at least one of the strings 
is null
3. Serialize the object on the client

What is the expected output? What do you see instead?
SEVERE: (TypeError) : Cannot read property 'length' of null
com.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot read 
property 'length' of null
    at Unknown.wrap_4_g$(Exceptions.java:36)
    at Unknown.$length_13_g$(String.java:758)
    at Unknown.length__I__devirtual$_1_g$(String.java:757)
    at Unknown.getBytesUtf8_0_g$(String.java:457)
    at Unknown.$getBytes_1_g$(String.java:679)
    at Unknown.getBytes_Ljava_lang_String___B__devirtual$_0_g$(String.java:677)
    at Unknown.writeString_1_g$(Base64PackedStreamFactory.java:202)
    at Unknown.writeString_2_g$(WriteContext.java:250)
    at Unknown.writeObject_16_g$(SimpleArrayStreamers.java:255)
    at Unknown.writeObject_4_g$(WriteContext.java:129)
    at Unknown.writeObjectData_0_g$(StructStreamer.java:46)
    at Unknown.writeObject_2_g$(StructStreamer.java:21)
    at Unknown.writeObject_4_g$(WriteContext.java:129)
    at Unknown.writeObjectData_1_g$(CollectionStreamer.java:38)
    at Unknown.writeObject_5_g$(CollectionStreamer.java:16)
    at Unknown.writeObject_4_g$(WriteContext.java:129)
    at Unknown.writeObjectData_0_g$(StructStreamer.java:46)
    at Unknown.writeObject_2_g$(StructStreamer.java:21)
    at Unknown.writeObject_4_g$(WriteContext.java:129)
    at Unknown.writeObject_1_g$(Streamer.java:259)
    at Unknown.toString_38_g$(Streamer.java:215)
    at Unknown.onSuccess_4_g$(IDocsServiceCacheImpl.java:85)
    at Unknown.onSuccess_5_g$(IDocsServiceCacheImpl.java:83)
    at Unknown.onResponseReceived_0_g$(RequestCallbackAdapter.java:232)
    at Unknown.fireOnResponseReceived_0_g$(Request.java:250)
    at Unknown.onReadyStateChange_0_g$(RequestBuilder.java:412)
    at Unknown.anonymous(XMLHttpRequest.java:329)
    at Unknown.apply_0_g$(Impl.java:247)
    at Unknown.entry0_0_g$(Impl.java:299)
    at Unknown.anonymous(Impl.java:72)


What version of the product are you using? On what operating system?
2.0.0

Please provide any additional information below.

java.lang.NullPointerException
    at com.googlecode.gwtstreamer.client.impl.Base64PackedStreamFactory$Base64Writer.writeString(Base64PackedStreamFactory.java:199)
    at com.googlecode.gwtstreamer.client.impl.WriteContext.writeString(WriteContext.java:250)
    at com.efounder.gwt.streamer.JResponseObjectStreamer.writeObject(JResponseObjectStreamer.java:30)
    at com.googlecode.gwtstreamer.client.impl.WriteContext.writeObject(WriteContext.java:129)
    at com.googlecode.gwtstreamer.client.Streamer.writeObject(Streamer.java:259)
    at com.googlecode.gwtstreamer.client.Streamer.toString(Streamer.java:215)

What steps will reproduce the problem?
1. Add gwt-streamer to project/build.
2. Use in GWT client code.

results in failure to build because gwt-streamer uses types not in GWT JRE 
emulation.

So how can one use this in GWT at all?

[ERROR] Errors in 
'jar:file:/C:/Users/david.hoffer/.m2/repository/gwt-streamer/gwt-streamer/1.0/gw
t-streamer-1.0.jar!/com/nkdata/gwt/streamer/client/StreamerFactory.java'
[INFO]          [ERROR] Line 71: No source code is available for type 
java.util.Properties; did you forget to inherit a required module?
[INFO]          [ERROR] Line 78: The method forName(String) is undefined for 
the type Class
[INFO]          [ERROR] Line 85: The method forName(String) is undefined for 
the type Class
[INFO]          [ERROR] Line 86: The method newInstance() is undefined for the 
type Class<capture#7-of ?>
[INFO]          [ERROR] Line 107: The method forName(String) is undefined for 
the type Class
[INFO]          [ERROR] Line 128: The method forName(String) is undefined for 
the type Class
[INFO]          [ERROR] Line 135: The method forName(String) is undefined for 
the type Class
[INFO]          [ERROR] Line 136: The method newInstance() is undefined for the 
type Class<capture#13-of ?>
[INFO]          [ERROR] Line 147: The method forName(String) is undefined for 
the type Class

Some frameworks/servers may resolve Streamer class with the underlying 
classloader during application startup. I don't know why the application 
context classloader loads business classes again instead of delegate to 
underlying classloader. Streamers in shared cache read a server classloader's 
version of class while an application requires them to be loaded with 
application context classloader.

Reference: http://www.28im.com/java/a905853.html.

TODO: review initialization part, remove all shared static attributes, change 
singleton nature to prototype.

1. create a custom Streamer Class
2. regist into config
StreamerConfig config = ...
config.registerStreamer( MyObject.class, new MyCustomStreamer() );
...
Streamer.applyConfig(config);
3. throw exception at runtime, error message following:

TreeMap Caused by: java.lang.ClassCastException: java.lang.Class cannot be cast 
to java.lang.Comparable

because :

private SortedMap<Class<?>,Streamer> registeredStreamers = new 
TreeMap<Class<?>,Streamer>();

TreeMap's key must be Comparable, but Class<?> is not comparable!

instead of 
 private SortedMap<Class<?>,Streamer> registeredStreamers = new TreeMap<Class<?>,Streamer>();

with

private Map<Class<?>, Streamer> registeredStreamers = new 
LinkedHashMap<Class<?>, Streamer>();

fix issues