JLCA 3.0 - Introduction

Java Language Conversion Assistant (JLCA henceforth) is a tool that provides support for the conversion of software written in VJ++ and Java to Microsoft’s Visual C# .NET and .NET Framework. JLCA 3.0 is the latest version of the tool. It supports conversion of a majority of Java’s APIs and Java technologies supported by J2SE 1.3 and J2EE 1.3. It also addresses important issues of reducing the compilation errors and improving the conversion coverage and user experience as compared to the previous versions of the tool.

 

Table 1 summarizes the JLCA versions released so far.

JLCA	Source	For .NET Framework
1.0	Visual Studio 2003	1.1 (Everett)
2.0	Download from here	1.1 (Everett)
3.0 Beta (GDR)	Download from here	1.1 (Everett)
3.0 Whidbey	Visual Studio 2005	2.0 (Whidbey)

Table 1: JLCA Released Versions

The following parts of this document describe the main issues and features addressed/implemented in JLCA 3.0.

 

· The section “J2SE and J2EE Coverage” gives idea of the conversion coverage achieved by JLCA 3.0 corresponding to Java 1.3 Features.

· The section “JLCA 3.0” describes the new features released in JLCA 3.0 compared to JLCA 2.0.

J2SE and J2EE Coverage

JLCA 3.0 is designed to assist in the conversion of Java applications using inherent J2SE 1.3 and J2EE 1.3 features. Furthermore, it is designed to assist in converting VJ++ applications using VJ++ features.

 

The previous versions of the tool added support to convert Java applications using some features of J2SE and VJ++. JLCA 3.0 adds more support to the target feature set as described above.

 

Table 2 ,Table 3 and Table 4 describe the conversion coverage achieved by JLCA 3.0 for J2SE Basic features, J2SE 1.3 Java Foundation Classes (JFC) features and J2EE 1.3 features. For each feature, they provide top level details of the targeted API’s, extent of conversion and description of their conversion by using JLCA 3.0.

J2SE 1.3 Basic Features

J2SE 1.3 Feature	Package / Functionality	JLCA 3.0 Coverage	Description
Arbitrary Precision Math	java.math	Partially Converted	Most of the functionality of this package is not converted.
Collections Framework	java.util	Converted	Conversion to .NET Framework is achieved natively or by means of support classes. Some members are converted with different behavior.
Extension Mechanism	java.lang.ClassLoader java.lang.Package java.lang.Thread java.net.JarURLConnect java.net.URLClassLoader SecureClassLoading	Not Converted	The Java Extension Mechanism does not apply for the .NET Framework.
I/O	java.io	Partially Converted	High rate of conversion is achieved for this package. Some hierarchy conflicts are present in the conversion.
Internationalization	Locales and Resources Calendar and Time Zone Formatting Loc-Sensitive String Ops Character Sets and Classif. AWT Attributes Stream I/O	Partially Converted	Conversion is achieved for Locales, Locale-Sensitive String Ops, and Resources. The remaining functionality is either not converted or is converted with a different behavior.
Java Archive (JAR) Files	java.util.jar java.net.JarURLConnection JAR Files Loading	Not Converted	Java Archive Files has no equivalent mapping in .NET Framework. JLCA is however able to read JAR Files to extract .class info.
Java Native Interface (JNI)	-	Not Converted	JNI functionality is not converted.
JavaBeans	java.beans	Partially Converted	Bean Classes, Properties, Events and Descriptors are converted.
Language and Utility Packages	java.lang java.util java.util.jar java.util.zip	Partially Converted	The functionality of java.lang and java.util packages is converted. The functionality of java.util.jar and java.util.zip packages is not converted.
Miscellaneous Features	The @deprecated Tag The APPLET Tag	Converted	JavaDoc tags are converted to .NET Framework Doc tags. Html <Applet> tag is converted to <Object> tag for Applet conversion.
Networking	java.net	Partially Converted	Encoding and Decoding parts in this package are not converted.
Object Serialization	java.io.Externalizable java.io.Serializable	Partially Converted	The core functionality of this package is converted. Some source-code patterns are not converted. The repository containing the serialized objects could require further conversion.
Package Version Identification	java.lang.Class java.lang.ClassLoader java.lang.Package java.lang.System	Partially Converted	Java Package Versioning does not apply for the .NET Framework. Some of the functionality of this package is converted.
Reference Objects	java.lang.ref	Partially Converted	WeakReference is converted.
Reflection	java.lang.reflect	Partially Converted	Advanced features are not converted.
Remote Method Invocation (RMI)	java.rmi java.rmi.activation java.rmi.dgc java.rmi.registry java.rmi.server	Partially Converted	The client conversion is based on source-code patterns. Some complementary functionality is not converted.
Resources	java.lang.Class java.lang.ClassLoader java.net.URLClassLoader java.util.ResourceBundle java.security SecurityManagement	Partially Converted	The Class Loading functionality is not converted. Remaining core functionality is converted with different behavior at times.
Security and Signed Applets	java.security java.security.cert java.security.interfaces java.security.spec	Partially Converted	The classes and interfaces holding Certificates, Keys, Signatures, Principals, Permissions, Digests and Encryption Algorithms are converted.
Sound	javax.sound.midi javax.sound.midi.spi javax.sound.sampled javax.sound.sampled.spi	Partially Converted	The javax.sound.sampled package is converted to Microsoft.DirectX.DirectSound, but needs Managed DirectX installed on the machine.

Table 2: J2SE 1.3 Basic Features Coverage

J2SE 1.3 Java Foundation Classes (JFC)

J2SE 1.3 JFC Feature	API / Functionality	JLCA 3.0 Coverage	Description
2D Graphics and Imaging	com.sun.image.codec.jpeg java.awt java.awt.color java.awt.font java.awt.geom java.awt.image java.awt.print	Partially Converted	The functionality of 2D Graphics and Colors, Fonts and Geometry is converted. Remaining features of this package are not converted or converted with a different behavior.
Abstract Window Toolkit (AWT)	java.awt java.awt.datatransfer java.awt.event	Partially Converted	The widget classes are converted. Conversion for Events is based on source-code patterns. Layout Management conversion is not well achieved.
Accessibility	javax.accessibility	Partially Converted	Highh rate of conversion is achieved for the basic features and is mainly based on source-code patterns.
Drag-and-Drop data transfer	java.awt.dnd	Partially Converted	The conversion supported is based on source-code patterns.
Input Method Framework	java.awt.Component java.awt.event java.awt.im java.text	Not Converted	This functionality does not have an equivalent in the .NET Framework model.
Project Swing Components	javax.swing javax.swing.border javax.swing.colorchooser javax.swing.event javax.swing.filechooser javax.swing.plaf javax.swing.table javax.swing.text javax.swing.tree javax.swing.undo	Partially Converted	The functionality of Models, Editors, Layout Management, Borders, Renderers and Pluggable Look And Feel is not converted.

Table 3: J2SE 1.3 Java Foundation Classes Coverage

J2EE 1.3 Features

J2EE 1.3 Feature	API / Functionality	JLCA 3.0 Coverage	Description
J2EE Connector 1.0		Not Converted	This feature is not supported.
CORBA JavaTM IDL	Idl	Partially Converted	The conversion of IDL Files to .NET framework is covered. The Server and Client side conversion is based on source-code patterns.
CORBA RMI-IIOP	org.omg.CORBA Org.omg.CosNaming	Not Converted	This feature is not supported.
ECperf 1.0		Not Converted	This feature is not supported.
Enterprise JavaBeans (EJBs) 2.0 and 1.1 (CORBA Mapping)	javax.ejb javax.ejb.spi XML Deployment Descriptor	Partially Converted	High rate of conversion is achieved for classes and interfaces for any EJB, Transactions and EJB Security. Container-Managed Persistense (CMP) Entity Beans are converted partially. Client Side conversion is based on source-code patterns.  To achieve conversion the ejb-jar.xml file should be included.
Java API for XML Processing (JAXP)	javax.xml.parsers javax.xml.transform	Partially Converted	Conversion to .NET Framework is achieved natively or by means of support classes. Conversion for SAX (org.xml.sax) and DOM (org.w3c.dom) is supported.
Java API for XML Registries (JAXR)	javax.xml.registry	Not Converted	This feature is not supported.
Java API for XML-based RPC (JAX-RPC)	javax.xml.rpc	Not Converted	This feature is not supported.
Java Architecture in XML Binding (JAXB)	javax.xml.bind	Not Converted	This feature is not supported.
Java Database Connectivity (JDBC)	java.sql javax.sql	Partially Converted	High rate of conversion is achieved for JDBC 1.0, for calling statements and stored procedures, data types, transactions and connection pools. For JDBC 2.0, only RowSetMetaData and RowSet are partially converted. The driver operations are not converted.
Java Message Service 1.0.2b	javax.jms	Partially Converted	JMS core functionality is converted to use MSMQ. Some advanced JMS functionality is not converted.
Java Naming and Directory Interface (JNDI)	javax.naming javax.naming.directory javax.naming.event javax.naming.ldap javax.naming.spi Service Providers	Partially Converted	Features related to accessing naming/directory services are converted. Functionality relative to event notification, LDAP and service plugging in is not converted.
Java Servlet 2.3	javax.servlet javax.servlet.http	Partially Converted	The core and HTTP Servlets functionality is converted. Contexts and Bindings are not converted.
Java Transaction API 1.0.1B	javax.transaction javax.transaction.xa	Partially Converted	The support has been added to convert JMS, EJBs and JDBC.
Java Transaction Service 1.0	javax.jts org.omg.CORBA org.omg.CosTransactions Org.omg.CosTSPortability	Not Converted	This feature is not supported.
JavaBeans Activation Framework 1.0.1	javax.activation	Partially Converted	Few functionality conversions have a different behavior.
JavaMail API 1.2	javax.mail javax.mail.event javax.mail.internet javax.mail.search	Partially Converted	The basic mailing functionality is converted while the advanced JavaMail features are not converted.
JavaServer Faces	javax.faces	Not Converted	This feature is not supported.
JavaServer Pages (JSP) 1.2	Core Functionality Tag Libraries JSP Standard Tag Library	Partially Converted	Most of JSP core functionality and tag libraries are converted. Web Application Deployment is made using IIS. Java Standard Tag Library is not converted.
SOAP with Attachments API for Java (SAAJ)	javax.xml.soap	Not Converted	This feature is not supported.

Table 4: J2EE 1.3 Features Coverage

Comments

• Anonymous
  June 13, 2006
  JLCA 3.0 — это такое средство для конверсии кода Java в код C#, причём таким обр
• Anonymous
  June 18, 2006
  The comment has been removed
• Anonymous
  June 19, 2009
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