The Java Community Process(SM) Program - JSRs: Java Specification Requests - detail JSR# 245

Status: Maintenance
JCP version in use: 2.7
Java Specification Participation Agreement version in use: 2.0

Description:
This is the next revision of the JavaServer^TM Pages specification. The purpose of JSP 2.1 is to improve alignment with JavaServer^TM Faces (JSF) and enhance ease of development.

Please direct comments on this JSR to the Spec Lead(s)

Team

Specification Leads

Kinman Chung Oracle

Expert Group

Apache Software Foundation Bayern, Shawn BEA Systems

Boeing Borland Software Corporation Capgemini

Developmentor Dudney, Bill Exadel, Inc.

Falkner, Jayson IBM Ironflare AB

Leme, Felipe Mann, Kito D. New Atlanta Communications, LLC

Novell, Inc. Oracle Pramati Technologies

SAP SE SAS Institute Inc. Schneider, Kris

Spielman, Sue Sun Microsystems, Inc. TmaxSoft, Inc.

Trifork Umapathy, Sivasundaram

Updates to the Original JSR

The following information has been updated from the original request.

2010年02月15日:
The Maintenance Lead of this JSR has changed from Sun Microsystems to Oracle America, Inc.

Specification Lead: Kin-Man Chung

E-Mail Address: kinman.chung@oracle.com

Telephone Number: +1 408 276 7116

Fax Number: -

2006年02月14日:

Specification Lead: Jan Luehe

E-Mail Address: jan.luehe@sun.com

Telephone Number: +1 415 762 0186
+1 718 408 3164

Fax Number: -

Original Java Specification Request (JSR)

Identification | Request | Contributions

Section 1. Identification

Submitting Member: Sun Microsystems, Inc.

Name of Contact Person: Mark Roth

E-Mail Address: mark.roth@sun.com

Telephone Number: +1 718 408 3164

Fax Number: + 1 718 408 3164

Specification Lead: Pierre Delisle & Mark Roth

E-Mail Address: pierre.delisle@sun.com
mark.roth@sun.com

Telephone Number: +1 408 276 7056
+1 718 408 3164

Fax Number: + 1 408 276 7056
+1 718 408 3164

NOTE that this information has been updated from this original request.

Initial Expert Group Membership:

BEA Systems
Boeing
Borland Software Corporation
Hans Bergsten (Individual)
Jayson Falkner (Individual)
IBM
Kevin Jones (Individual)
Macromedia, Inc.
New Atlanta Communications, LLC
Novell, Inc.
Oracle
SAS Institute, Inc.
Shawn Bayern (Individual)
Sun Microsystems, Inc.

Supporting this JSR:

Section 2: Request

2.1 Please describe the proposed Specification:

JSP technology is focused on simplifying the generation of dynamic web content. The JSP 2.0 specification (JSR-152) substantially extended the technology by integrating a simple yet powerful expression language, simplifying the tag extension API, and enhancing the pure XML syntax, among other important enhancements. These enhancements greatly reduced the learning curve of the technology, warranting a major version number upgrade.

The scope of JSP 2.1 is much narrower and focuses on better alignment with the next release of JavaServer Faces.

JavaServer Faces 1.0 (JSR-127) defines a standard framework for building User Interface components, and builds on top of JSP 1.2 technology. Because JSP 1.2 technology does not have an integrated expression language and because the JSP 2.0 EL does not meet all of the needs of JSF, a new expression language was developed for JSF 1.0. The JSF EG attempted to make the language as compatible with JSP 2.0 as possible but some differences were necessary. The JSF EG agreed that the JSF 1.0 EL will be phased out in the next release of the JSF specification in favor of the JSP 2.1 expression language. It is a goal, therefore, of JSP 2.1 to enhance the expression language to meet the needs of JSF technology. Many of these enhancements are likely to be useful in other contexts as well.

Enhancements to be considered for the JSP 2.1 expression language include, but are not limited to, the following:

moving the expression language chapter into its own specification document, to be delivered under this JSR with consultation from the JavaServer Faces expert group
ability to redefine the behavior of the "." operator through a Property Resolver API
ability to plug in Variable Resolvers on a per-application and per-page basis
ability to plug in Property Resolvers on a per-application and per-page basis
ability to express references to bean methods using the expression language and invoking those methods via a Method Binding API
ability to express references to bean properties using the expression language and getting/setting those attributes via a Property Binding API
ability to defer expression evaluation until a time of a tag handler's choosing

In addition to the primary focus area, the JSP 2.1 specification will synchronize with any changes in the corresponding J2EE, J2SE and Servlet API JSRs, and will consider addressing very small incremental fixes to the JSP 2.0 specification.

2.2 What is the target Java platform? (i.e., desktop, server, personal, embedded, card, etc.)

Java^TM 2 Platform, Enterprise Edition (J2EE) 1.5.

2.3 The Executive Committees would like to ensure JSR submitters think about how their proposed technology relates to all of the Java platform editions. Please provide details here for which platform editions are being targeted by this JSR, and how this JSR has considered the relationship with the other platform editions.

This specification targets the J2EE 1.5 Platform. It will be based on the corresponding release of the J2SE platform.

2.4 Should this JSR be voted on by both Executive Committees?

No.

2.5 What need of the Java community will be addressed by the proposed specification?

JSP 2.1 will address the need of the Java community for closer synchronization between the JavaServer Faces and JavaServer Pages specifications.

2.6 Why isn't this need met by existing specifications?

JSP 2.0 finalized before JSF 1.0 did and thus could not fully accommodate JSF's changing requirements.

2.7 Please give a short description of the underlying technology or technologies:

See 2.1 above.

2.8 Is there a proposed package name for the API Specification? (i.e., `javapi.something`, `org.something`, etc.)

javax.servlet.jsp.*, javax.servlet.jsp.tagext.*, javax.servlet.jsp.el.*

2.9 Does the proposed specification have any dependencies on specific operating systems, CPUs, or I/O devices that you know of?

No.

2.10 Are there any security issues that cannot be addressed by the current security model?

The JSP specification will build on the Servlet specification in this area.

2.11 Are there any internationalization or localization issues?

JSP technology deals with internationalization and localization and may provide small refinements to existing features in this area.

2.12 Are there any existing specifications that might be rendered obsolete, deprecated, or in need of revision as a result of this work?

The JavaServer Faces specification will need to be revised to support the new JSP 2.1 expression language. JSF will continue to support its existing expression language for backwards compatibility but will favor the JSP 2.1 expression language going forward.

2.13 Please describe the anticipated schedule for the development of this specification.

The specification will follow the J2EE 1.5 schedule.

The following dates are preliminary:

Expert Group Formation: May 2004
Early Draft Review: September 2004
Public Review: November 2004
Proposed Final Draft: January 2005
Final Release: This will occur at the time of the J2EE 1.5 Final Release.

2.14 Please describe the anticipated working model for the Expert Group working on developing this specification.

We envision an elaboration of the style followed in the JSR-152 EG: an active Expert Group, with an open mailing list that is combined with private communication and with a EG web site for exchanging of information. In addition, members from both the JavaServer Pages and the JavaServer Faces expert group will form an EL subteam to ensure that the needs of both JSP and JSF are well represented.

2.15 It is important to the success of the community and each JSR that the work of the Expert Group be handled in a manner which provides the community and the public with insight into the work the Expert Group is doing, and the decisions that the Expert Group has made. The Executive Committees would like to ensure Spec Leads understand the value of this transparency and ask that each JSR have an operating plan in place for how their JSR will address the involvement of the community and the public. Please provide your plan here, and refer to the Spec Lead Guide for a more detailed description and a set of example questions you may wish to answer in your plan.

The leads of this JSR strongly believe in the importance of transparency and will create project "jsp-spec-public" at java.net to keep members of the community informed about the work performed in this JSR.

More specifically, this transparency will be realized at java.net through the following tools:

- Community pages will be maintained within the project to provide general information on the JSP specification and more specifically on the currently active JSR.
- The users@jsp-spec-public mailing list will be open to the public to discuss issues related to the JSP specification.
- The 'Issue Tracker' tool will be used as a public repository of issues related to the JSP specification. Through the various categorization fields offered by the tool, it will be easy to get information on issues being considered for the current JSR, as well as on other issues being postponed for future revision JSRs.

Finally, it is also important to note that the source tree for the Reference Implementation of this JSR is open-sourced within the jakarta-tomcat project at Apache.

2.16 Please describe how the RI and TCK will de delivered, i.e. as part of a profile or platform edition, or stand-alone, or both. Include version information for the profile or platform in your answer.

Sun will deliver a Reference Implementation (RI) and Technology Compatibility Kit (TCK) as part of J2EE 1.5. In addition, the source code for the RI will be available through Apache and the TCK for JSP will be available independently. See the business terms for more details.

2.17 Please state the rationale if previous versions are available stand-alone and you are now proposing in 2.13 to only deliver RI and TCK as part of a profile or platform edition (See sections 1.1.5 and 1.1.6 of the JCP 2 document).

N/A

2.18 Please provide a description of the business terms for the Specification, RI and TCK that will apply when this JSR is final.

Pursuant to Section 2.2.1 of the Java Community Process version 2.6, the following is a summary of Sun's anticipated principal license terms and conditions for the JSR ### JavaServer Pages, version 2.1.

The JavaServer Pages 2.1 TCK will be licensed at no charge, without support, to qualified not-for-profit entities in accordance with the terms of Compatibility Testing Scholarship Program. For more information, please refer to: http://java.sun.com/scholarship/. The TCK may be licensed for commercial use by licensing the J2EE 1.5 CTS.

The Reference Implementation source may be licensed for commercial redistribution by licensing the J2EE 1.5 Reference Implementation source.

Licensing of the RI is not required for the licensing of the TCK.

Section 3: Contributions

3.1 Please list any existing documents, specifications, or implementations that describe the technology. Please include links to the documents if they are publicly available.

J2EE 1.4, JSP 2.0, Servlet 2.4 - These are the basic J2EE 1.4 specifications, now final and available at: http://java.sun.com/j2ee/
JSTL 1.1 - Standard tag library for JSP 2.0. Addresses key issues of usability by JSP page authors. http://java.sun.com/products/jsp/jstl/
JSF 1.0 - Provides a standard User Interface component framework. Not yet final. http://java.sun.com/j2ee/javaserverfaces/
JSF 1.2 - The revision of the JavaServer Faces specification that will synchronize with JSP 2.1. JSR not yet filed.
J2EE 1.5 - The umbrella JSR for J2EE 1.5. http://jcp.org/en/jsr/detail?id=244
JSR 176: J2SE 1.5 JSR - The base standard edition platform for JSP 2.1. http://jcp.org/en/jsr/detail?id=176
Servlet 2.4 MR for J2EE 1.5 - The base servlet functionality that we expect JSP 2.1 to use.

3.2 Explanation of how these items might be used as a starting point for the work.

The JSP 2.0 specification will be used as a starting point for the work on JSP 2.1, which will be part of the greater J2EE 1.5 platform, which also includes the next version of Servlet. The needs of the JavaServer Faces specification that JSP 1.2 and JSP 2.0 do not fulfill will drive some of the requirements for JSP 2.1. JSTL is a related technology.