org.gvsig.fmap.dal.store.dbf.utils

Class DbaseCodepage

java.lang.Object

org.gvsig.fmap.dal.store.dbf.utils.DbaseCodepage

public class DbaseCodepage
extends java.lang.Object

Reads and writes codepage (.cpg) files which are sometime used to externally specify the charset encoding of a DBF file.

Field Summary

Fields

Modifier and Type	Field and Description
static short[]	dbfLdid Define the valid dbf Language driver IDs (equivalent to MSDOS code pages), which are used on the byte 29 of the DBF header to define the DBF codepage.
static java.lang.String[]	ldidJava Equivalent Java charset names to the code pages defined in dbfLdid, using Java NIO Charset names (which differ from JAVA IO names, see https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html)

Constructor Summary

Constructors

Constructor and Description
DbaseCodepage(java.io.File dbfFile) Defines the dbfFile and constructs the name of the .cpg file based on it

Method Summary

Modifier and Type	Method and Description
static java.lang.String	cpg2java(java.lang.String codePage)
java.lang.String	getCharset()
static java.lang.String	getCharsetName(int ldid) Gets the Java NIO charset name equivalent to the provided ldid value.
static java.lang.String	getCpgFileName(java.lang.String dbfFile)
static int	getLdid(java.lang.String charsetName) Gets the dbf Language driver IDs (code pages) corresponding to the provided charset name
static java.lang.String	java2cpg(java.lang.String charset)
java.lang.String	read() Reads the charset from the codepage file, and updates the internal charset definition
void	setCharset(java.lang.String charset)
void	write(java.lang.String charset) Writes the specified charset to the codepage file, and updates the internal charset definition

Methods inherited from class java.lang.Object

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

Field Detail

dbfLdid

public static final short[] dbfLdid

Define the valid dbf Language driver IDs (equivalent to MSDOS code pages), which are used on the byte 29 of the DBF header to define the DBF codepage. The equivalences of these charsets using Java NIO charset names are defined on the ldidJava array (so 0x01 is equivalent to IBM437, 0x02 to IBM850, etc) See some other equivalences in: https://github.com/infused/dbf/blob/master/docs/supported_encodings.csv https://github.com/olemb/dbfread/blob/master/dbfread/codepages.py https://joinup.ec.europa.eu/svn/gvsig-desktop/trunk/libraries/libFMap/src/com/iver/cit/gvsig/fmap/drivers/dbf/DbfEncodings.java

ldidJava

public static final java.lang.String[] ldidJava

Equivalent Java charset names to the code pages defined in dbfLdid, using Java NIO Charset names (which differ from JAVA IO names, see https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html)

Constructor Detail

DbaseCodepage

public DbaseCodepage(java.io.File dbfFile)

Defines the dbfFile and constructs the name of the .cpg file based on it

Method Detail

getCpgFileName

public static java.lang.String getCpgFileName(java.lang.String dbfFile)

getCharset

public java.lang.String getCharset()

setCharset

public void setCharset(java.lang.String charset)

cpg2java

public static java.lang.String cpg2java(java.lang.String codePage)

java2cpg

public static java.lang.String java2cpg(java.lang.String charset)

read

public java.lang.String read()

Reads the charset from the codepage file, and updates the internal charset definition

write

public void write(java.lang.String charset)

Writes the specified charset to the codepage file, and updates the internal charset definition

getLdid

public static int getLdid(java.lang.String charsetName)

Gets the dbf Language driver IDs (code pages) corresponding to the provided charset name

Returns:

The LDID code, or 0x00 if no equivalent LDID code was found for the provided charsetName

getCharsetName

public static java.lang.String getCharsetName(int ldid)

Gets the Java NIO charset name equivalent to the provided ldid value. Gets null if the provided ldid is not recognised as a valid code