Package db

Class Field

java.lang.Object

db.Field

All Implemented Interfaces:

java.lang.Comparable<Field>

Direct Known Subclasses:

BinaryField, BooleanField, ByteField, IntField, LongField, ShortField, StringField

public abstract class Field
extends java.lang.Object
implements java.lang.Comparable<Field>

Field is an abstract data wrapper for use with Records.

Constructor Summary

Constructors

Constructor	Description
Field()

Method Summary

Modifier and Type	Method	Description
abstract boolean	equals(java.lang.Object obj)
abstract byte[]	getBinaryData()	Get data as a byte array.
boolean	getBooleanValue()	Get field as a boolean value.
byte	getByteValue()	Get field as a byte value.
protected abstract byte	getFieldType()	Return Field instance type as an integer value
int	getIntValue()	Get field as an integer value.
long	getLongValue()	Get field as a long value.
short	getShortValue()	Get field as a short value.
java.lang.String	getString()	Get field as a String value.
abstract java.lang.String	getValueAsString()
abstract int	hashCode()
boolean	isVariableLength()
abstract Field	newField()	Create new instance of this field type.
abstract Field	newField(Field fieldValue)	Create new instance of this field type.
void	setBinaryData(byte[] bytes)	Set data from binary byte array.
void	setBooleanValue(boolean value)	Set field's boolean value.
void	setByteValue(byte value)	Set field's byte value.
void	setIntValue(int value)	Set field's integer value.
void	setLongValue(long value)	Set field's long value.
void	setShortValue(short value)	Set field's short value.
void	setString(java.lang.String str)	Set field's String value.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Comparable

compareTo

Constructor Detail

Field

public Field()

Method Detail

getLongValue

public long getLongValue()

Get field as a long value. All fixed-length field objects must implement this method

Returns:

long value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setLongValue

public void setLongValue(long value)

Set field's long value. All fixed-length field objects must implement this method

Parameters:

value - long value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

getIntValue

public int getIntValue()

Get field as an integer value.

Returns:

integer value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setIntValue

public void setIntValue(int value)

Set field's integer value.

Parameters:

value - integer value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

getShortValue

public short getShortValue()

Get field as a short value.

Returns:

short value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setShortValue

public void setShortValue(short value)

Set field's short value.

Parameters:

value - short value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

getByteValue

public byte getByteValue()

Get field as a byte value.

Returns:

byte value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setByteValue

public void setByteValue(byte value)

Set field's byte value.

Parameters:

value - byte value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

getBooleanValue

public boolean getBooleanValue()

Get field as a boolean value.

Returns:

boolean value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setBooleanValue

public void setBooleanValue(boolean value)

Set field's boolean value.

Parameters:

value - boolean value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

getBinaryData

public abstract byte[] getBinaryData()

Get data as a byte array.

Returns:

byte[]

setBinaryData

public void setBinaryData(byte[] bytes)

Set data from binary byte array. All variable-length fields must implement this method.

Parameters:

bytes - field data

getString

public java.lang.String getString()

Get field as a String value.

Returns:

String value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

setString

public void setString(java.lang.String str)

Set field's String value.

Parameters:

str - String value

Throws:

IllegalFieldAccessException - thrown if method is not supported by specific Field instance.

isVariableLength

public boolean isVariableLength()

Returns:

true if a Field instance is variable length, else false.

newField

public abstract Field newField(Field fieldValue)

Create new instance of this field type.

Parameters:

fieldValue - initial field value.

Returns:

long

newField

public abstract Field newField()

Create new instance of this field type.

Returns:

long

getFieldType

protected abstract byte getFieldType()

Return Field instance type as an integer value

equals

public abstract boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public abstract int hashCode()

Overrides:

hashCode in class java.lang.Object

getValueAsString

public abstract java.lang.String getValueAsString()