Package hec.io.dbf

Class AbstractDBFHeader

java.lang.Object

hec.io.dbf.AbstractDBFHeader

All Implemented Interfaces:

DBFHeader, Serializable

Direct Known Subclasses:

AsciiSerializableDbfHeader, DBaseIIIHeader, DBaseIVHeader, DBaseIVMemoHeader

public abstract class AbstractDBFHeader
extends Object
implements DBFHeader

This is the base class that represents the header for a DBF file.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected List	_fieldDescriptors
protected byte[]	_header	This is the byte array that represents the DBF Header from the file on disk.
protected int	_headerSize
protected int	_numRecords
protected int	_recordSize
static final int	FIELD_DESCRIPTOR_OFFSET
static final int	FIELD_DESCRIPTOR_SIZE

Constructor Summary

Constructors

Constructor	Description
AbstractDBFHeader()

Method Summary

Modifier and Type	Method	Description
void	deleteFieldDescriptor(int pos)
void	deleteFieldDescriptor(String name)
protected void	fillPreHeaderByteArray(byte[] headerBytes)	Creates a copy of header, inserts the new header size, recordSize, and numberRecords and returns the new byte array; Edits only the first 32bytes of data
byte[]	getByteArray()	Returns the byte array the represents this header file
abstract byte	getDbaseVersionCode()
DBFFieldDescriptor	getFieldDescriptor(int pos)
DBFFieldDescriptor	getFieldDescriptor(String fieldName)
List	getFieldDescriptors()
String[]	getFieldNames()
int	getHeaderSize()
int	getNumDescriptors()
int	getNumRecords()
int	getRecordSize()
void	insertFieldDescriptor(DBFFieldDescriptor fd, int pos)
protected boolean	readFieldDescriptors(EndianInputStream reader)
boolean	readHeader(EndianInputStream reader)
protected boolean	readPreHeader(EndianInputStream reader)
void	resizeFieldDescriptor(int newSize, int pos)

Methods inherited from class java.lang.Object

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

Field Details

FIELD_DESCRIPTOR_SIZE

public static final int FIELD_DESCRIPTOR_SIZE

See Also:

• Constant Field Values

FIELD_DESCRIPTOR_OFFSET

public static final int FIELD_DESCRIPTOR_OFFSET

See Also:

• Constant Field Values

_header

protected byte[] _header

This is the byte array that represents the DBF Header from the file on disk. Once it is read it should never be changed. Use getByteArray() to get the current byte information.

_headerSize

protected int _headerSize

_recordSize

protected int _recordSize

_numRecords

protected int _numRecords

_fieldDescriptors

protected List _fieldDescriptors

Constructor Details

AbstractDBFHeader

public AbstractDBFHeader()

Method Details

getHeaderSize

public int getHeaderSize()

Specified by:

getHeaderSize in interface DBFHeader

getNumRecords

public int getNumRecords()

Specified by:

getNumRecords in interface DBFHeader

getRecordSize

public int getRecordSize()

Specified by:

getRecordSize in interface DBFHeader

deleteFieldDescriptor

public void deleteFieldDescriptor(int pos)

Specified by:

deleteFieldDescriptor in interface DBFHeader

deleteFieldDescriptor

public void deleteFieldDescriptor(String name)

Specified by:

deleteFieldDescriptor in interface DBFHeader

resizeFieldDescriptor

public void resizeFieldDescriptor(int newSize,
 int pos)

Specified by:

resizeFieldDescriptor in interface DBFHeader

insertFieldDescriptor

public void insertFieldDescriptor(DBFFieldDescriptor fd,
 int pos)

Specified by:

insertFieldDescriptor in interface DBFHeader

getFieldDescriptors

public List getFieldDescriptors()

Specified by:

getFieldDescriptors in interface DBFHeader

getFieldNames

public String[] getFieldNames()

Specified by:

getFieldNames in interface DBFHeader

getFieldDescriptor

public DBFFieldDescriptor getFieldDescriptor(int pos)

Specified by:

getFieldDescriptor in interface DBFHeader

getFieldDescriptor

public DBFFieldDescriptor getFieldDescriptor(String fieldName)

Specified by:

getFieldDescriptor in interface DBFHeader

getNumDescriptors

public int getNumDescriptors()

Specified by:

getNumDescriptors in interface DBFHeader

readHeader

public boolean readHeader(EndianInputStream reader)

Specified by:

readHeader in interface DBFHeader

readPreHeader

protected boolean readPreHeader(EndianInputStream reader)

readFieldDescriptors

protected boolean readFieldDescriptors(EndianInputStream reader)

fillPreHeaderByteArray

protected void fillPreHeaderByteArray(byte[] headerBytes)

Creates a copy of header, inserts the new header size, recordSize, and numberRecords and returns the new byte array; Edits only the first 32bytes of data

getDbaseVersionCode

public abstract byte getDbaseVersionCode()

getByteArray

public byte[] getByteArray()

Returns the byte array the represents this header file

Specified by:

getByteArray in interface DBFHeader