net.sf.farrago.type.runtime
Class Ucs2CharPointer

java.lang.Object
  java.io.InputStream
      java.io.ByteArrayInputStream
          net.sf.farrago.type.runtime.BytePointer
              net.sf.farrago.type.runtime.EncodedCharPointer
                  net.sf.farrago.type.runtime.Ucs2CharPointer

All Implemented Interfaces:

Closeable, CharSequence, AssignableValue, DataValue

public class Ucs2CharPointer
extends EncodedCharPointer

Ucs2CharPointer specializes EncodedCharPointer to interpret its bytes as characters encoded via a UCS-2 charset.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/type/runtime/Ucs2CharPointer.java#4 $

Author:

John Sichi

Field Summary

Fields inherited from class net.sf.farrago.type.runtime.BytePointer

CONCAT_METHOD_NAME, emptyBytes, ENFORCE_PRECISION_METHOD_NAME, GET_BYTE_COUNT_METHOD_NAME, INITCAP_METHOD_NAME, L1, LOWER_METHOD_NAME, OVERLAY_METHOD_NAME, ownBytes, POSITION_METHOD_NAME, S1, SET_POINTER_METHOD_NAME, SUBSTRING_METHOD_NAME, TRIM_METHOD_NAME, UPPER_METHOD_NAME

Fields inherited from class java.io.ByteArrayInputStream

buf, count, mark, pos

Fields inherited from interface net.sf.farrago.type.runtime.AssignableValue

ASSIGNMENT_METHOD_NAME

Constructor Summary

Ucs2CharPointer()

Method Summary

protected void	allocateOwnBytesForPrecision(int n)
long	attemptFastAsciiByteToLong() Attempts to convert this pointer's contents from a single-byte-ASCII-encoded integer string into a long.
char	charAt(int index)
void	enforceBytePrecision(int precision, boolean needPad, byte padByte) Pads or truncates this value according to the given precision.
protected int	getByteCountForPrecision(int n)
protected String	getCharsetName()
void	initcap(BytePointer bp1) initcap the string.
int	length()
void	lower(BytePointer bp1) lower the case for each character of the string
void	overlay(BytePointer bp1, BytePointer bp2, int starting, int length, boolean useLength) Assigns this value to the result of inserting bp2's value into bp1's value at a specified starting point, possibly deleting a prefix of the remainder of bp1 of a given length.
int	position(BytePointer bp1)
protected void	setCharAt(int index, char c)
CharSequence	subSequence(int start, int end)
void	substring(int starting, int length, boolean useLength) Reduces the value to a substring of the current value.
void	trim(int trimOrdinal, BytePointer bp1, BytePointer bp2)
void	upper(BytePointer bp1) upper the case for each character of the string

Methods inherited from class net.sf.farrago.type.runtime.EncodedCharPointer

getBytesForString, getNullableData, toString

Methods inherited from class net.sf.farrago.type.runtime.BytePointer

allocateOwnBytes, assignFrom, calcSubstringPointers, cast, cast, cast, cast, cast, compareBytes, concat, copyFrom, finishOverlay, getByteCount, isNull, positionImpl, setNull, setPointer, writeToBuffer, writeToBufferAbsolute

Methods inherited from class java.io.ByteArrayInputStream

available, close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.io.InputStream

read

Methods inherited from class java.lang.Object

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

Constructor Detail

Ucs2CharPointer

public Ucs2CharPointer()

Method Detail

length

public int length()

Specified by:

length in interface CharSequence

Overrides:

length in class BytePointer

allocateOwnBytesForPrecision

protected void allocateOwnBytesForPrecision(int n)

Overrides:

allocateOwnBytesForPrecision in class BytePointer

getByteCountForPrecision

protected int getByteCountForPrecision(int n)

Overrides:

getByteCountForPrecision in class BytePointer

enforceBytePrecision

public void enforceBytePrecision(int precision,
                                 boolean needPad,
                                 byte padByte)

Description copied from class: BytePointer

Pads or truncates this value according to the given precision.

Overrides:

enforceBytePrecision in class BytePointer

Parameters:

precision - desired precision, in characters for character data, or bytes for binary data

needPad - true if short values should be padded

padByte - byte to pad with

substring

public void substring(int starting,
                      int length,
                      boolean useLength)

Description copied from class: BytePointer

Reduces the value to a substring of the current value.

Overrides:

substring in class BytePointer

Parameters:

starting - desired starting position

length - the length.

useLength - to indicate whether length parameter should be used.

overlay

public void overlay(BytePointer bp1,
                    BytePointer bp2,
                    int starting,
                    int length,
                    boolean useLength)

Description copied from class: BytePointer

Assigns this value to the result of inserting bp2's value into bp1's value at a specified starting point, possibly deleting a prefix of the remainder of bp1 of a given length. Implements the SQL string OVERLAY function.

Overrides:

overlay in class BytePointer

Parameters:

bp1 - string1

bp2 - string2

starting - starting point

length - length

useLength - whether to use length parameter

position

public int position(BytePointer bp1)

Overrides:

position in class BytePointer

charAt

public char charAt(int index)

Specified by:

charAt in interface CharSequence

Overrides:

charAt in class BytePointer

setCharAt

protected void setCharAt(int index,
                         char c)

Overrides:

setCharAt in class BytePointer

subSequence

public CharSequence subSequence(int start,
                                int end)

Specified by:

subSequence in interface CharSequence

Overrides:

subSequence in class BytePointer

getCharsetName

protected String getCharsetName()

Specified by:

getCharsetName in class EncodedCharPointer

Returns:

the charset used for this pointer's encoding, or BINARY if no character data is encoded

trim

public void trim(int trimOrdinal,
                 BytePointer bp1,
                 BytePointer bp2)

Overrides:

trim in class BytePointer

upper

public void upper(BytePointer bp1)

Description copied from class: BytePointer

upper the case for each character of the string

Overrides:

upper in class BytePointer

Parameters:

bp1 - string1

lower

public void lower(BytePointer bp1)

Description copied from class: BytePointer

lower the case for each character of the string

Overrides:

lower in class BytePointer

Parameters:

bp1 - string1

initcap

public void initcap(BytePointer bp1)

Description copied from class: BytePointer

initcap the string.

Overrides:

initcap in class BytePointer

Parameters:

bp1 - string1

attemptFastAsciiByteToLong

public long attemptFastAsciiByteToLong()

Description copied from class: BytePointer

Attempts to convert this pointer's contents from a single-byte-ASCII-encoded integer string into a long.

Overrides:

attemptFastAsciiByteToLong in class BytePointer

Returns:

converted value if successful, or Long.MAX_VALUE if unsuccessful (does not necessarily indicate that cast fails, just that this fast path can't handle it, e.g. negative/decimal/floating)