oracle.sql

Class CHAR

java.lang.Object

oracle.sql.Datum

oracle.sql.CHAR

All Implemented Interfaces:

java.io.Serializable

public class CHAR
extends Datum

The Oracle specific representation of characters. The class extends oracle.sql.Datum and interprets the bytes according to one of the Oracle supported character sets. Each object of type oracle.sql.CHAR contains an indication of what character set to use in interpreting the bytes so one class can be used for all the variations, such as National Character Set, Client, Database, etc.

For conversions that are not supported directly by CHAR (e.g. "best effort" conversions from String), if the programer wants a "best attempt" even when the conversion looses information, the "withReplacement" methods of oracle.sql.CharacterSet can be used directly.

See Also:

CharacterSet, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static CharacterSet	DEFAULT_CHARSET

Fields inherited from class oracle.sql.Datum

ojiOracleDatumWithConnection, targetDatum

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CHAR()
	CHAR(java.lang.Object obj, CharacterSet charSet) Construct a CHAR from an Object.
	CHAR(java.lang.String str, CharacterSet charSet) Constructor for CHAR.
	CHAR(java.lang.String str, CharacterSet charSet, int len) Constructor for CHAR.

Method Summary

Modifier and Type	Method and Description
java.io.InputStream	asciiStreamValue() Convert to an ascii stream representation of the datum object
java.math.BigDecimal	bigDecimalValue() Convert this data object into a BigDecimal.
java.io.InputStream	binaryStreamValue() Convert to a binary stream representation of the datum object
boolean	booleanValue() Convert to a boolean representation of the datum object
byte	byteValue() Convert to a byte representation of the datum object
java.io.Reader	characterStreamValue() Convert to a character stream representation of the datum object
java.sql.Date	dateValue() Convert to a Date representation of the datum object
double	doubleValue() Convert to a double representation of the datum object
float	floatValue() Convert to a float representation of the datum object
protected oracle.jdbc.internal.OracleConnection	getConnectionDuringExceptionHandling()
java.lang.String	getString() Converts the sequence of characters represented by this to a String.
int	intValue() Convert to a integer representation of the datum object
boolean	isConvertibleTo(java.lang.Class<?> jClass) Test whether this data object can be converted to the specified Java data type.
boolean	isVariableLength() Determines if this instance represents a variable or fixed length character sequence.
long	longValue() Convert to a long representation of the datum object
int	oracleId() The integer that identifies the character set.
void	setVariableLength(boolean variableLength) Sets a flag to indicate if this instance represents a fixed or variable length character sequence.
java.lang.String	stringValue() Convert this data object into a String.
java.sql.Timestamp	timestampValue() Convert to a Timestamp representation of the datum object
java.sql.Time	timeValue() Convert to a Time representation of the datum object
java.lang.Object	toJdbc() Convert this data object into its default Java object type.
java.lang.String	toString() Converts the characters to a String.

Methods inherited from class oracle.sql.Datum

bytesEqual, bytesHashCode, compareBytes, getBytes, getLength, getStream, isNull, setBytes, setShareBytes, shareBytes, stringValue, timestampValue, timeValue, toClass

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHARSET

public static final CharacterSet DEFAULT_CHARSET

Constructor Detail

CHAR

protected CHAR()

CHAR

public CHAR(java.lang.String str,
            CharacterSet charSet,
            int len)
     throws java.sql.SQLException

Constructor for CHAR.
Similar to CHAR(String str, CharacterSet charSet) Added parameter len. This CHAR constructor will space pad the CHAR object up to the length specificed by len.

Parameters:

str - the sequence of characters (represented in Unicode).

charSet - the CharacterSet to which the string should be converted.

if charSet is null, default charset will be used. The default charset choose we8iso8859p1 as Oracle Utiliites charset.

len - the length that the CHAR object will be space padded up to

Throws:

java.sql.SQLException - if the attempt to convert str to charSet throws an exception.

CHAR

public CHAR(java.lang.String str,
            CharacterSet charSet)
     throws java.sql.SQLException

Constructor for CHAR.
The String is first converted to the indicated character set. No provision is made for loss if the CharacterSet cannot represent all Unicode characters. Although perhaps some time in the future it may throw an exception in that case.

Parameters:

str - the sequence of characters (represented in Unicode).

charSet - the CharacterSet to which the string should be converted.

if charSet is null, default charset will be used. The default charset choose we8iso8859p1 as Oracle Utiliites charset.

Throws:

java.sql.SQLException - if the attempt to convert str to charSet throws an exception.

CHAR

public CHAR(java.lang.Object obj,
            CharacterSet charSet)
     throws java.sql.SQLException

Construct a CHAR from an Object.

Parameters:

obj - input data from which this class instance is constructed. This constructor calls obj.toString() to obtain the input string.

charSet - character set of the CHAR to be created.

Throws:

java.sql.SQLException - if the input argument 'obj' is an instance of an unsupported class, or if the input object cannot be converted into a CHAR.

Method Detail

oracleId

public int oracleId()

The integer that identifies the character set.

Returns:

Oracle character set ID

getString

public java.lang.String getString()
                           throws java.sql.SQLException

Converts the sequence of characters represented by this to a String.

Returns:

a String containing the Unicode characters represented in this.

Throws:

java.sql.SQLException - if conversion from this.oracleId to UTF is not supported

java.sql.SQLException - if the particular cannot characters cannot be converted without loss to Unicode.

toString

public java.lang.String toString()

Converts the characters to a String. Attempts to use getString, but if that throws an exception presents a hex representation of the individual bytes.

Overrides:

toString in class java.lang.Object

toJdbc

public java.lang.Object toJdbc()
                        throws java.sql.SQLException

Convert this data object into its default Java object type.

Specified by:

toJdbc in class Datum

Returns:

the data value as a (fill in the blank) object.

Throws:

java.sql.SQLException - if any of the lower layer code throws an exception.

isConvertibleTo

public boolean isConvertibleTo(java.lang.Class<?> jClass)

Test whether this data object can be converted to the specified Java data type.

Specified by:

isConvertibleTo in class Datum

Parameters:

jClass - specifies the Java data type to test against.

Returns:

true if this data object is convertible to the specified Java class, and a corresponding xxxValue() method is available; otherwise, a false is returned.

stringValue

public java.lang.String stringValue()

Convert this data object into a String.

Overrides:

stringValue in class Datum

Returns:

the data value in String representation.

booleanValue

public boolean booleanValue()
                     throws java.sql.SQLException

Convert to a boolean representation of the datum object

Overrides:

booleanValue in class Datum

Returns:

boolean representation of the datum object

Throws:

SQLException, - if no boolean representation exists

java.sql.SQLException

intValue

public int intValue()
             throws java.sql.SQLException

Convert to a integer representation of the datum object

Overrides:

intValue in class Datum

Returns:

integer representation of the datum object

Throws:

SQLException, - if no integer representation exists

java.sql.SQLException

longValue

public long longValue()
               throws java.sql.SQLException

Convert to a long representation of the datum object

Overrides:

longValue in class Datum

Returns:

long representation of the datum object

Throws:

SQLException, - if no long representation exists

java.sql.SQLException

floatValue

public float floatValue()
                 throws java.sql.SQLException

Convert to a float representation of the datum object

Overrides:

floatValue in class Datum

Returns:

float representation of the datum object

Throws:

SQLException, - if no float representation exists

java.sql.SQLException

doubleValue

public double doubleValue()
                   throws java.sql.SQLException

Convert to a double representation of the datum object

Overrides:

doubleValue in class Datum

Returns:

double representation of the datum object

Throws:

SQLException, - if no double representation exists

java.sql.SQLException

byteValue

public byte byteValue()
               throws java.sql.SQLException

Convert to a byte representation of the datum object

Overrides:

byteValue in class Datum

Returns:

byte representation of the datum object

Throws:

SQLException, - if no byte representation exists

java.sql.SQLException

dateValue

public java.sql.Date dateValue()
                        throws java.sql.SQLException

Convert to a Date representation of the datum object

Overrides:

dateValue in class Datum

Returns:

java.sql.Date representation of the datum object

Throws:

SQLException, - if no Date representation exists

java.sql.SQLException

timeValue

public java.sql.Time timeValue()
                        throws java.sql.SQLException

Convert to a Time representation of the datum object

Overrides:

timeValue in class Datum

Returns:

java.sql.Time representation of the datum object

Throws:

SQLException, - if no Time representation exists

java.sql.SQLException

timestampValue

public java.sql.Timestamp timestampValue()
                                  throws java.sql.SQLException

Convert to a Timestamp representation of the datum object

Overrides:

timestampValue in class Datum

Returns:

java.sql.Timestamp representation of the datum object

Throws:

SQLException, - if no Timestamp representation exists

java.sql.SQLException

bigDecimalValue

public java.math.BigDecimal bigDecimalValue()
                                     throws java.sql.SQLException

Convert this data object into a BigDecimal.

Overrides:

bigDecimalValue in class Datum

Returns:

the data value in BigDecimal representation.

Throws:

java.sql.SQLException

characterStreamValue

public java.io.Reader characterStreamValue()
                                    throws java.sql.SQLException

Convert to a character stream representation of the datum object

Overrides:

characterStreamValue in class Datum

Returns:

character stream representation of the datum object

Throws:

SQLException, - if no character stream representation exists

java.sql.SQLException

asciiStreamValue

public java.io.InputStream asciiStreamValue()
                                     throws java.sql.SQLException

Convert to an ascii stream representation of the datum object

Overrides:

asciiStreamValue in class Datum

Returns:

ascii stream representation of the datum object

Throws:

SQLException, - if no ascii stream representation exists

java.sql.SQLException

binaryStreamValue

public java.io.InputStream binaryStreamValue()
                                      throws java.sql.SQLException

Convert to a binary stream representation of the datum object

Overrides:

binaryStreamValue in class Datum

Returns:

binary stream representation of the datum object

Throws:

SQLException, - if no binary stream representation exists

java.sql.SQLException

getConnectionDuringExceptionHandling

protected oracle.jdbc.internal.OracleConnection getConnectionDuringExceptionHandling()

Overrides:

getConnectionDuringExceptionHandling in class Datum

setVariableLength

public void setVariableLength(boolean variableLength)

Sets a flag to indicate if this instance represents a fixed or variable length character sequence.

Parameters:

variableLength - True for variable length or false for fixed length.

isVariableLength

public boolean isVariableLength()

Determines if this instance represents a variable or fixed length character sequence.

Returns:

True if variable length or false if fixed length.