Interoperability at Apache Software Foundation
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This presentation was presented at a Document Inteop Initiative event held in Brussels and promoted by Microsoft. It gives a view of projects related to interoperability within the Apache Software Foundation.
Transcript of Interoperability at Apache Software Foundation
Paolo Mottadelli
http://www.sourcesense.com
Agenda
Apache Software Foundation (ASF) Interoperability @ ASF Some ASF projects for interoperability Apache POI Demo
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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.”
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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
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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
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ASF principles
MeritocracyRespect
Consensus
Transparency
OpennessSimplicity
Responsibility
Voluntary work
Mutual assistance
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Apache for Interoperability
Collaboration Transparency Neutrality Faith to standards High quality Reference implementations TCKs
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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)
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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.
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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
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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
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OOXML dev status
XSSF module : FINAL status (in POI-3.5) XWPF module : DRAFT status XSLF module : not covered yet
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HSSF & XSSF
Common User Model (DOM-like) interface User Model based on the existing HSSF one Using OpenXML4J and SAX to do event
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XSSF Usermodel
Workbook A Workbook holds a Sheet A Sheet contains Rows A Row contains cells From a Cell get Content and others
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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";
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