org.apache.cocoon.generation
Class CSVGenerator

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.xml.AbstractXMLProducer
          org.apache.cocoon.generation.AbstractGenerator
              org.apache.cocoon.generation.ServiceableGenerator
                  org.apache.cocoon.generation.FileGenerator
                      org.apache.cocoon.generation.CSVGenerator

All Implemented Interfaces:

Poolable, Recyclable, Disposable, Component, LogEnabled, Serviceable, CacheableProcessingComponent, Generator, SitemapModelComponent, XMLProducer

public class CSVGenerator
extends FileGenerator

A simple parser converting a Comma Separated Values (CSV) file into XML.

This parser is controlled by the following sitemap parameters:

• process-headers: whether the first line in the CSV is considered to be the header defining column names (the resulting output will be different if this is true or false (default: false).
• max-records: the maximum number of records to read (default: -1 read all records).
• encoding: the character encoding (UTF-8, ISO8859-1, ...) used to interpret the input CSV source file (default: system default).
• separator: the field-separator character in the CSV file (comma, tab, ...) (default: , comma).
• escape: the character used to escape fields, or part of them, in the CSV file (default: " quote).
• buffer-size: the size of the buffer used for reading the source CSV file (default: 4096 bytes).

The generated output will look something like the following:

 <?xml version="1.0" encoding="ISO-8859-1"?>
 <csv:document xmlns:csv="http://apache.org/cocoon/csv/1.0">
   <csv:header>
     <csv:column number="1">Column A</csv:column>
     <csv:column number="2">Column B</csv:column>
     <csv:column number="3">Column C</csv:column>
   </csv:header>
   <csv:record number="1">
     <csv:field number="1" column="Column A">Field A1</csv:field>
     <csv:field number="2" column="Column B">Field B1</csv:field>
     <csv:field number="3" column="Column C">Field C1</csv:field>
   </csv:record>
   <csv:record number="2">
     <csv:field number="1" column="Column A">Field A2</csv:field>
     <csv:field number="2" column="Column B">Field B2</csv:field>
     <csv:field number="3" column="Column C">Field C2</csv:field>
   </csv:record>
 </csv:document>
 

Note that this generator has been thoroughly tested with CSV files generated by Microsoft Excel. Unfortunately no official CSV specification has ever been published by any standard body, so the interpretation of the format might be slightly different in cases.

Author:

Pier Fumagalli

Field Summary

static String	NAMESPACE_PREFIX The namespace prefix of XML generated by this instance.
static String	NAMESPACE_URI The namespace URI of XML generated by this instance.

Fields inherited from class org.apache.cocoon.generation.FileGenerator

inputSource

Fields inherited from class org.apache.cocoon.generation.ServiceableGenerator

manager

Fields inherited from class org.apache.cocoon.generation.AbstractGenerator

objectModel, parameters, resolver, source

Fields inherited from class org.apache.cocoon.xml.AbstractXMLProducer

contentHandler, EMPTY_CONTENT_HANDLER, lexicalHandler, xmlConsumer

Fields inherited from interface org.apache.cocoon.generation.Generator

ROLE

Constructor Summary

CSVGenerator()
Create a new CSVGenerator instance.

Method Summary

void	generate() Generate XML data from a Comma Separated Value resource.
Serializable	getKey() Generate the unique key.
void	recycle() Recycle this component.
void	setup(SourceResolver resolver, Map object_model, String source, Parameters parameters) Setup this CSVGenerator instance.

Methods inherited from class org.apache.cocoon.generation.FileGenerator

getValidity

Methods inherited from class org.apache.cocoon.generation.ServiceableGenerator

dispose, service

Methods inherited from class org.apache.cocoon.xml.AbstractXMLProducer

setConsumer, setContentHandler, setLexicalHandler

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.cocoon.xml.XMLProducer

setConsumer

Field Detail

NAMESPACE_URI

public static final String NAMESPACE_URI

The namespace URI of XML generated by this instance.

See Also:

Constant Field Values

NAMESPACE_PREFIX

public static final String NAMESPACE_PREFIX

The namespace prefix of XML generated by this instance.

See Also:

Constant Field Values

Constructor Detail

CSVGenerator

public CSVGenerator()

Create a new CSVGenerator instance.

Method Detail

recycle

public void recycle()

Recycle this component.

.

Specified by:

recycle in interface Recyclable

Overrides:

recycle in class FileGenerator

setup

public void setup(SourceResolver resolver,
                  Map object_model,
                  String source,
                  Parameters parameters)
           throws ProcessingException,
                  SAXException,
                  IOException

Setup this CSVGenerator instance.

Specified by:

setup in interface SitemapModelComponent

Overrides:

setup in class FileGenerator

Throws:

ProcessingException

SAXException

IOException

getKey

public Serializable getKey()

Generate the unique key.

Specified by:

getKey in interface CacheableProcessingComponent

Overrides:

getKey in class FileGenerator

Returns:

The generated key hashes the src

generate

public void generate()
              throws IOException,
                     SAXException,
                     ProcessingException

Generate XML data from a Comma Separated Value resource.

.

Specified by:

generate in interface Generator

Overrides:

generate in class FileGenerator

Throws:

IOException

SAXException

ProcessingException