So this is similar to a backport of javax.script to 1.4? On Tue, Apr 15, 2008 at 7:13 AM, Rahul Akolkar <[EMAIL PROTECTED]> wrote:
> [I] Rationale: > > Numerous expression languages exist for embedding in Java-based > applications and frameworks. There is a growing tend to defer choice > of the expression language, especially since users of frameworks and > middleware components demand such freedom. Commons Expression aims to > provide a simple abstraction over these expression languages. > > No such library exists in Apache Commons or anywhere else under AL, AFAIK. > > [II] Scope: > > The package shall create and maintain a simple abstraction API over > expression languages. It will also provide the necessary adapters to > bridge the API with several existing expression language > implementations. The exact list is TBD, it may grow over time pending > community interest. Examples are (references provided for a couple): > > * Commons EL [1] > * Commons JEXL [2] > * JavaScript > * Pnuts > * MVEL > * OGNL > * JUEL > * javax.script related > > The package shall not implement an expression language of its own. > > [III] Dependencies: > > The Commons Expression codebase shall not have any compile-time > dependencies, other than each of the expression language > implementations for the above-mentioned adapters. The run-time > dependencies will be a function of developer choice. > > The minimum JDK version shall be 1.4, atleast one JDK 1.4-compatible > release is anticipated. A JDK 1.5 branch can be started concurrently > while in sandbox, pending interest. > > [IV] Code Provenance: > > The library will be seeded with code from Commons SCXML [3]. > Specifically, the Context and Evaluator interfaces along with existing > implementations for Commons EL and Commons JEXL along with > corresponding tests will be pulled in. Further additions will be > driven by community interest. > > [V] Naming, Resources and Conventions: > > The base name for the proposed package will be: > > org.apache.commons.expression > > The project will use the Apache Commons user and dev mailing lists, > will create a component repository named "expression" (lower case) in > SVN under commons-sandbox and will be listed as "Expression" in the > project list in JIRA (as "Expression" component under "SANDBOX" before > graduation). Code style conventions will be borrowed from the parent > component (Commons SCXML). > > [VI] Committer Interest: > > The following Apache committer has expressed interest in the creation > of this Commons Sandbox component: > > * Rahul Akolkar > > [VII] Reference Links: > > [1] Commons EL http://commons.apache.org/el/ > [2] Commons JEXL http://commons.apache.org/jexl/ > [3] Commons SCXML http://commons.apache.org/scxml/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- dIon Gillard "Any sufficiently advanced technology is indistinguishable from magic" - Arthur C. Clarke 1917 - 2008
