xBaseJ - Java Objects To Read and Write to dBase Files.

This current release supports DBF, DBT, NDX MDX, and FPT files.

Features

Navigational Access

xBaseJ classes offer several methods to process dBase III and IV files and FoxPro files.

Record Locking

High Capacity Channel Access

Implements channel I/O methods and routines.

A RMI Server and RMI Client Package

The package comes with a RMI based database server application and client interface classes. These classes allow remote clients to access databases on your server machines. While the RMI package is very fast, it offers NO SECURITY NOR LOCKING MECHANISMS.

Database Browser

xBaseJ has two classes, dbfShow and dbfViewer, for a GUI access local databases.

dbfShow an AWT application navigates a database record by record

dbfViewer a Swing application displays the database as a table.

A GUI To Create a Database

Database HTML Report Generator

xBaseJ has a class, dbfHTML, that creates an HTML output file of your databases.

Field level objects

Each Field in the database is an object unto itself.

A Java class that reads a dbf file and creates a Java bean to simplify your coding effort

xBaseJMailer

An E-Mailer application that reads a dbf file to generate and send e-mail messages.

Current dBase Format Supported

dBase III - DBF, DBT, and NDX No support for expression or function indexes. dBase IV - DBF, DBT, MDX, and NDX No support for expression or function indexes. FoxPro - DBF, FPT no support for FoxPro indexes.

Examples

Required External Jar Files

A version of these files should be in the download package.

Apache Commons Logging

http://commons.apache.org/logging/

JUnit - not really required but necessary if you plan to use the test files.

http://www.junit.org/

Known Problems

There is some incompatibility with dBase V and MDX files use numeric indexes and indexes using date fields.

xBaseJ.Properties

Properties may be set in one of two ways. First, with the xBaseJ.properties file. Contents of which are the standard properties file used by Java. ignoreDBFLengthCheck=true ignoreMissingMDXFile=false <

Second by using the xBaseJ.Util.setxBaseJProperty method passing the name value pair as two parameters. import xBaseJ.util; ... setxBaseJProperty("ignoreDBFLengthCheck", "true"); <

Property Descriptions

Name	Description	Possible Values	Default Value
checkPropertyFileForChanges	Indicates to recheck the property file system date to see if it has changed since the last get properties call.	True, Yes, False, No	True, check to see if property file has changed since last call.
fieldFilledWithSpaces	When a character field length is shorter than its maximum length the remain bytes are field with spaces or binary zeros.	True, Yes, False, No	False, remaining bytes filled with binary zeros.
ignoreDBFLengthCheck	Used when creating a DBF, dBase defines maximum record length at 4000. Set this property to true when you want to create dbf files with record lengths greater than 4000.	True, Yes, False, No	False, record length maximum is 4000
ignoreMissingMDX	When opening a DBF file that has its MDX file indicator set to true xBaseJ, like other dbase engines, looks to open the associated MDX file. If it can't be found an exception is thrown. If this property is set to true or yes then the application will not throw an exception.	True, Yes, False, No	False, throw exception if MDX file is missing.
memoFileExtension	When you want to use a different extension for the memo file. Most applications use "DBT" some use "FPT", others have been used.	anything	if left blank application assumes "DBT".
otherValidCharactersInFieldNames	Used to specify non LATIN characters in field names.	anything	n/a
trimFields	Removing trailing spaces from character fields when using get method.	True, Yes, False, No	False, trailing spaces are not removed.

The Classes

Classes	Documentation	Description
DBF	Methods	DBF class is used to create an database object. It contains several methods for database access and control
Classes	Documentation	Description
Index	Abstract class for Index files and tags
NDX	Protected and private methods.	Used to access the DBF through NDX files.
MDX	Protected and Mostly private methods.	Used to access the DBF through MDX tags
Classes	Documentation	Description
Field	Abstract class	Used by the Field classes
CharField	character Field subclass	Used to access Field types of 'C'
DateField	date Field subclass	Used to access Field types of 'D'
LogicalField	logical Field subclass	Used to access Field types of 'L'
MemoField	memo Field subclass	Used to access Field types of 'M'
PictureField	picture Field subclass	Used to access Field types of 'P'
NumField	numeric Field subclass	Used to access Field types of 'N'
FloatField	float Field subclass	Used to access Field types of 'F'
Classes	Documentation	Description
dbfShow	Java Frame.	This is a Java frame we wrote for testing the class. Write to us and we'll send you the source. To run this Java application use the following command line: java xBaseJ.dbfShow
dbfViewer	Java Swing JFrame.	This is a Java swing jframe we wrote for testing the class. To run this Java application use the following command line: java xBaseJ.dbfViewer
Classes	Documentation	Description
rmi/Server	The RMI Server.	Use this to create RMI access to your xBase files.
rmi/DBFServerInterface	The Client Access to Server is by an Interface	Used in conjunction with server. This is the interface that operates on the client machine.
rmi/DBFInterface	The Client Access to DBF objects is by an Interface	Access fields and other database constructs.
rmi/Field	The Client Access to Field objects also by an Interface	Here are the getter/setter methods for the field objects
Other Classes	Documentation	Description
XBASEXMLParser	The XML Parser To Create DBF Files	Used in conjunction with the XBASE.DTD file and a XML file built with the DTD specifications.

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