Package db

Class StringField

java.lang.Object

db.Field

db.StringField

All Implemented Interfaces:

java.lang.Comparable<Field>

public final class StringField
extends Field

StringField provides a wrapper for variable length String data which is read or written to a Record. Strings are always encoded as UTF-8.

Nested Class Summary

Nested classes/interfaces inherited from class db.Field

Field.UnsupportedFieldException

Field Summary

Fields

Change	Modifier and Type	Field	Description
NEW	static StringField	INSTANCE	Instance intended for defining a Table Schema
NEW	static StringField	NULL_VALUE	Null string field value

Fields inherited from class db.Field

EMPTY_ARRAY

Constructor Summary

Constructors

Change	Constructor	Description
StringField()	Construct a String field with an initial value of null.
StringField(java.lang.String str)	Construct a String field with an initial value of s.

Method Summary

Change	Modifier and Type	Method	Description
	int	compareTo(Field o)
NEW	StringField	copyField()	Create new instance of this field with the same value.
	boolean	equals(java.lang.Object obj)
	byte[]	getBinaryData()	Get data as a byte array.
	java.lang.String	getString()	Get field as a String value.
	java.lang.String	getValueAsString()	Get field value as a formatted string
	int	hashCode()
	boolean	isVariableLength()
MODIFIED	StringField	newField()	Create new instance of this field type.
	void	setBinaryData(byte[] bytes)	Set data from binary byte array.
	void	setString(java.lang.String str)	Set field's String value.
	java.lang.String	toString()
REMOVED	Field	newField(Field fieldValue)	(Removed)

Methods inherited from class db.Field

canIndex, getBooleanValue, getByteValue, getIntValue, getLongValue, getShortValue, isSameType, setBooleanValue, setByteValue, setIntValue, setLongValue, setShortValue

Methods inherited from class java.lang.Object

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

Field Detail

NULL_VALUE NEW

public static final StringField NULL_VALUE

Null string field value

INSTANCE NEW

public static final StringField INSTANCE

Instance intended for defining a Table Schema

Constructor Detail

StringField

public StringField()

Construct a String field with an initial value of null.

StringField

public StringField(java.lang.String str)

Construct a String field with an initial value of s.

Parameters:

str - initial string value or null

Method Detail

getString

public java.lang.String getString()

Description copied from class: Field

Get field as a String value.

Overrides:

getString in class Field

Returns:

String value

setString

public void setString(java.lang.String str)

Description copied from class: Field

Set field's String value.

Overrides:

setString in class Field

Parameters:

str - String value

isVariableLength

public boolean isVariableLength()

Overrides:

isVariableLength in class Field

Returns:

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getValueAsString

public java.lang.String getValueAsString()

Description copied from class: Field

Get field value as a formatted string

Specified by:

getValueAsString in class Field

Returns:

field value string

equals

public boolean equals(java.lang.Object obj)

Specified by:

equals in class Field

getBinaryData

public byte[] getBinaryData()

Description copied from class: Field

Get data as a byte array.

Specified by:

getBinaryData in class Field

Returns:

byte[]

setBinaryData

public void setBinaryData(byte[] bytes)

Description copied from class: Field

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

Specified by:

setBinaryData in class Field

Parameters:

bytes - field data

compareTo

public int compareTo(Field o)

copyField NEW

public StringField copyField()

Description copied from class: Field

Create new instance of this field with the same value.

Specified by:

copyField in class Field

Returns:

new field instance with same value

newField MODIFIED

return type: Field → StringField

-db.Field newField()

+db.StringField newField()

public StringField newField()

Description copied from class: Field

Create new instance of this field type.

Specified by:

newField in class Field

Returns:

new field instance with undefined initial value

hashCode

public int hashCode()

Specified by:

hashCode in class Field