Interoperability at Apache Software Foundation

transcript

interop@apache.org

Paolo Mottadelli

p.mottadelli@sourcesense.com

http://www.sourcesense.com

Agenda

Apache Software Foundation (ASF) Interoperability @ ASF Some ASF projects for interoperability Apache POI Demo

Paolo Mottadelli - p.mottadelli@sourcesense.com

Apache Software Foundation

The Apache Software Foundation provides support for the Apache community of open-source

software projects.

“We consider ourselves not simply a group of projects sharing a server, but rather a community

of developers and users.”

ASF roles

Supports Apache projects with an infrastructure for open development

Plays as a legal entity for donations Offers legal support to Apache projects Promotes and protects the Apache brand

ASF actions

Supports collaborative software development Provides a Commercial Friendly License Produces high quality software Promotes an 'healthy' interaction among people Provides faithful standard implementations

ASF principles

MeritocracyRespect

Consensus

Transparency

OpennessSimplicity

Responsibility

Voluntary work

Mutual assistance

Apache projects

Apache HTTP Server

... other 63 projects

Interoperability @ ASF

Apache for Interoperability

Collaboration Transparency Neutrality Faith to standards High quality Reference implementations TCKs

Some ASF projects for interop

Some Interop ASF projects

Apache Stonehenge Apache QPID Apache Axis Apache POI (some) Reference Implementations

Apache Pluto: Java Portlet Specification (JSR-268) Apache Tomcat: Java Servet Container & JSP Apache Jackrabbit: JCR (JSR-170)

Apache POI

What is Apache POI ?

Apache top level project for developing pure Java ports of file formats based on Microsoft's OLE2

Compound Document Format,

and now for Office Open XML format.

POI modules (1)

Different sets of APIs:

POIFS: reading and writing Office Documents HSSF: r/w Excel spreadsheets HWPF: r/w Word documents HSLF: r/w Power Point presentations HPSF: r/w property sets

POI modules (2)

Support for Office Open XML format:

XSSF: r/w OXML Excel Spreadsheets XSLF: r/w OXML Power Point Presentations XWPF: r/w OXML Word Documents

OOXML dev status

XSSF module : FINAL status (in POI-3.5) XWPF module : DRAFT status XSLF module : not covered yet

HSSF & XSSF

Common User Model (DOM-like) interface User Model based on the existing HSSF one Using OpenXML4J and SAX to do event

XSSF Usermodel

Workbook A Workbook holds a Sheet A Sheet contains Rows A Row contains cells From a Cell get Content and others

Common HSSF & XSSF access

org.apache.poi.ss

Workbook wb;

if(args.length > 0 && args[0].equals("-xls")) wb = new HSSFWorkbook(); else wb = new XSSFWorkbook();

Sheet sheet = wb.createSheet("Timesheet"); .................................................................................. ............ same implementation for xls & xlsx ........ ..................................................................................

String file = "timesheet.xls"; if(wb instanceof XSSFWorkbook) file += "x";

Interoperability at Apache Software Foundation

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