de.frame4j.demos

Class SAXdemo

java.lang.Object

de.frame4j.util.App

de.frame4j.demos.SAXdemo

All Implemented Interfaces:

AttrSettable, TextHelper.MessageComponents, AppMBean, ComVar, UIInfo, ActionListener, EventListener

@MinDoc(copyright="Copyright 2004, 2005, 2009  A. Weinert",
        author="Albrecht Weinert",
        version="V.44",
        lastModified="6.05.2021",
        usage="start as Java application (-? for help)",
        purpose="a demo and introductory application for SAX XML parsers")
public class SAXdemo
extends App

Java XML demonstration application for SAX.

This application generates a SAXParser that is widely configurable. An input to this application is read and then parsed by taking the parser's XMLReader.

As a demonstration the inputs XML elements are counted and their frequency (by sorted name) is listed. Apart from the manifoldly configurable (grammar) checks SAXdemo does not much useful. The source, SAXdemo.java, and the SAXdemo.properties.properties may be a good starting point for XML applications based on Frame4J.


Copyright © 2001 - 2005, 2009 Albrecht Weinert

See Also:

XMLio, XMLdoc, XMLconf, SAXHandler

Nested Class Summary

Nested classes/interfaces inherited from interface de.frame4j.util.ComVar

ComVar.Impl

Field Summary

Fields

Modifier and Type	Field and Description
protected SAXHandler	handler The error and content handler.
protected Input	inp The XML input.
Integer	INT1 Integer 1.
boolean	showCount Display the frequency of names.
boolean	stopOnError Stop on errors.
protected HashMap<String,Integer>	tagCounts Hash table for counting names.
protected XMLconf	xmlConf Parser's properties.
String	xmlFile The XML file (or URL); the input.
protected XMLReader	xmlReader The SAX parser.

Fields inherited from class de.frame4j.util.App

ano, appBase, appIO, appStartTime, appStartTimeMS, args, argsOrig, bgColor, err, fullClassName, help, icon, log, mainThread, myClass, myFrame, name, out, outMode, packName, prop, retCode, runFlag, shortClassName, title, verbose, verbosity

Fields inherited from interface de.frame4j.util.ComVar

AUTHOR, BLANK_STRING, cons, CONSOL_ENCODING, COPYRIGHT, D, D_NaN, D_NegInf, D_PosInf, EMPTY_INT_A, EMPTY_STRING, FILE_ENCODING, FRW_CLLD, FS, FSS, H, hasCons, HOST_IP, HOST_IPv4, HOST_NAME, INIT_ERROR, JAR_ENCODING, JH, JOB_DONE_OK, JRL, LOG_OUT_ERROR, M, MAIN_THREAD_EXC, NO_BYTES, NO_CLASSES, NO_DOUBLES, NO_OBJECTS, NO_PARS_ERROR, NO_STRINGS, NOT_WINDOWS, ON_PI, ONE_DAY, ONE_HOUR, ONE_LEAP_YEAR, ONE_MINUTE, ONE_SECOND, ONE_WEEK, ONE_YEAR, OS, PROG_NAME, PROG_SHORT, PS, RUNTIME, S, SHY, UD, UL, UL_UR_da, UR

Fields inherited from interface de.frame4j.net.AttrSettable

ILLEGAL_TYPE, ILLEGAL_VALUE, NO_ATTRIBUTE, NO_KNOWN_ATTRIBUTE, NO_VALUE, OK, retVtext

Constructor Summary

Constructors

Constructor and Description
SAXdemo()

Method Summary

Modifier and Type	Method and Description
protected void	countName(CharSequence name) Count a name.
int	doIt() Working method of SaxDemo.
protected boolean	isHelpLog() Conditions for help output.
static void	main(String[] args) Start method of SAXDemo.

Methods inherited from class de.frame4j.util.App

actionPerformed, allowNoPropertiesFile, clientOrder, condHelpLog, connect, errMeld, errMeld, errorExit, errorExit, errorText, extraPropertiesFile, formMessage, formMessage, formMessage, getAbout, getAboutText, getActTime, getAppLogger, getAppStartTime, getArgs, getAuthor, getCopyright, getDbLogger, getExecTimeMs, getExecTimeMsL, getExecTimeString, getHelp, getHelpText, getIcon, getLanguage, getLogHandler, getMessageComponent, getMessageComponentsLength, getMyFrame, getName, getNameWithVersDate, getOutMode, getProp, getPurpose, getStartTime, getStateString, getTheCloser, getTitle, getUsage, getVerbose, getVerbosity, getVersDate, go, go, go, haveIcon, isDebug, isHelp, isNormal, isRunFlag, isSilent, isTest, isVerbose, logVerbose, logVerbose, makeStatusTextEnd, makeStatusTextStart, messageFormat, normalExit, parsePartial, performeAction, queueAction, regAsStdMBean, repExc, setAboutText, setAttribute, setAttribute, setAuthor, setBgColor, setCodePages, setCopyright, setHelp, setLogOut2, setName, setOutMode, setOutMode, setPurpose, setTitle, setUsage, setVerbose, setVerbose, setVerbosity, setVerbosity, setVersDate, stop, threeLineEndMsg, toString, twoLineEndMsg, twoLineStartMsg, valueLang, valueLang, wakeMainThread

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.frame4j.net.AttrSettable

retVtext

Field Detail

showCount

public boolean showCount

Display the frequency of names.

default: true

stopOnError

public boolean stopOnError

Stop on errors.

default: false

xmlFile

public String xmlFile

The XML file (or URL); the input.

xmlConf

protected XMLconf xmlConf

Parser's properties.

The XML parser's properties will be initialised, indirectly with App.prop, according to start parameters.

xmlReader

protected XMLReader xmlReader

The SAX parser.

The SAXParser will be made as XMLReader by xmlConf's method XMLconf.makeXMLReader(SAXHandler).
An object of a very simple anonymous inner class extending SAXHandler serves as handler.

inp

protected Input inp

The XML input.

Will be made according to xmlFile and the proxy properties of xmlConf. inp may be a file or URL.

handler

protected SAXHandler handler

The error and content handler.

See Also:

xmlReader

tagCounts

protected HashMap<String,Integer> tagCounts

Hash table for counting names.

Will be handled as <String, Integer> map:
key: tag respectively tag/attribute
value: it's frequency in xmlFile respectively inp.

INT1

public final Integer INT1

Integer 1.

Constructor Detail

SAXdemo

public SAXdemo()

Method Detail

isHelpLog

protected boolean isHelpLog()

Conditions for help output.

This implementation makes the on-line help shown, when xmlFile is null, additionally to App.help (by option -? or -help).t.

Overrides:

isHelpLog in class App

Returns:

App.help

See Also:

App.isHelp(), App.condHelpLog()

main

public static void main(String[] args)

Start method of SAXDemo.

Return-Code:
Exit 0, when run successfully

Parameters:

args - command line arguments

doIt

public int doIt()

Working method of SaxDemo.

Specified by:

doIt in class App

Returns:

the exit code; 0 means OK

See Also:

Prop, App.go(String[]), App.go(String[], String, CharSequence), App.mainThread

countName

protected void countName(CharSequence name)

Count a name.