com.healthmarketscience.jackcess.impl

Class LongValueColumnImpl

java.lang.Object

com.healthmarketscience.jackcess.impl.ColumnImpl

com.healthmarketscience.jackcess.impl.LongValueColumnImpl

All Implemented Interfaces:

Column, java.lang.Comparable<ColumnImpl>

Direct Known Subclasses:

MemoColumnImpl

class LongValueColumnImpl
extends ColumnImpl

ColumnImpl subclass which is used for long value data types.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	LongValueColumnImpl.LegacyLongValueBufferHolder Manages a common, shared extra page for long values.
private class	LongValueColumnImpl.LongValueBufferHolder Manages secondary page buffers for long value writing.
private class	LongValueColumnImpl.UmapLongValueBufferHolder Manages the column usage maps for long values.

Nested classes/interfaces inherited from class com.healthmarketscience.jackcess.impl.ColumnImpl

ColumnImpl.AutoNumberGenerator, ColumnImpl.InitArgs, ColumnImpl.SortOrder

Field Summary

Fields

Modifier and Type	Field and Description
private LongValueColumnImpl.LongValueBufferHolder	_lvalBufferH Holds additional info for writing long values
private static int	LONG_VALUE_TYPE_MASK Mask to apply the long length in order to get the flag bits (only the first 2 bits are type flags).
private static byte	LONG_VALUE_TYPE_OTHER_PAGE Long value (LVAL) type that indicates that the value is stored on another page
private static byte	LONG_VALUE_TYPE_OTHER_PAGES Long value (LVAL) type that indicates that the value is stored on multiple other pages
private static byte	LONG_VALUE_TYPE_THIS_PAGE Long value (LVAL) type that indicates that the value is stored on the same page

Fields inherited from class com.healthmarketscience.jackcess.impl.ColumnImpl

AUTO_NUMBER_FLAG_MASK, AUTO_NUMBER_GUID_FLAG_MASK, COMPRESSED_UNICODE_EXT_FLAG_MASK, FIXED_LEN_FLAG_MASK, GENERAL_LEGACY_SORT_ORDER, GENERAL_SORT_ORDER, HYPERLINK_FLAG_MASK, INVALID_AUTO_NUMBER, LOG, MILLIS_BETWEEN_EPOCH_AND_1900, NUMERIC_NEGATIVE_BYTE, RETURN_ROW_ID, UNKNOWN_FLAG_MASK

Fields inherited from interface com.healthmarketscience.jackcess.Column

AUTO_NUMBER, KEEP_VALUE

Constructor Summary

Constructors

Constructor and Description
LongValueColumnImpl(ColumnImpl.InitArgs args)

Method Summary

Modifier and Type	Method and Description
protected int	getMaxLengthInUnits()
int	getOwnedPageCount() Returns the number of database pages owned by this column.
(package private) void	postTableLoadInit() Secondary column initialization after the table is fully loaded.
java.lang.Object	read(byte[] data, java.nio.ByteOrder order) Deserialize a raw byte value for this column into an Object
private java.lang.String	readLongStringValue(byte[] lvalDefinition)
protected byte[]	readLongValue(byte[] lvalDefinition)
(package private) void	setUsageMaps(UsageMap ownedPages, UsageMap freeSpacePages) Sets the usage maps for this column.
protected java.nio.ByteBuffer	writeLongValue(byte[] value, int remainingRowLength) Write an LVAL column into a ByteBuffer inline if it fits, otherwise in other data page(s).
private void	writeLongValueHeader(java.nio.ByteBuffer lvalPage) Writes the header info for a long value page.
protected java.nio.ByteBuffer	writeRealData(java.lang.Object obj, int remainingRowLength, java.nio.ByteOrder order)

Methods inherited from class com.healthmarketscience.jackcess.impl.ColumnImpl

booleanToInteger, compareTo, countVariableLength, create, decodeTextValue, decodeUncompressedText, encodeTextValue, encodeUncompressedText, fromDateDouble, fromLocalDateDouble, getAutoNumberGenerator, getCalendar, getCharset, getColumnIndex, getColumnNumber, getColumnValidator, getComplexInfo, getDatabase, getDisplayIndex, getFixedDataOffset, getFormat, getLength, getLengthInUnits, getName, getOriginalDataType, getPageChannel, getPrecision, getProperties, getRowValue, getRowValue, getScale, getSQLType, getTable, getTextCodePage, getTextSortOrder, getType, getVarLenTableIndex, getVersionHistoryColumn, isAppendOnly, isAutoNumber, isCalculated, isCompressedUnicode, isGUIDValue, isHyperlink, isImmutableValue, isRawData, isVariableLength, rawDataWrapper, read, readCodePage, readExtraFlags, readFromNullMask, readSortOrder, setColumnIndex, setColumnValidator, setRowValue, setRowValue, setVersionHistoryColumn, storeInNullMask, toBigDecimal, toBigDecimal, toBooleanValue, toByteArray, toCharSequence, toDateDouble, toInternalValue, toLocalDateDouble, toString, toUnscaledByteArray, validate, withErrorContext, write, write, writeDefinitions, writeFixedLengthField, writeFixedLengthField, writeToNullMask

Methods inherited from class java.lang.Object

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

Field Detail

LONG_VALUE_TYPE_THIS_PAGE

private static final byte LONG_VALUE_TYPE_THIS_PAGE

Long value (LVAL) type that indicates that the value is stored on the same page

See Also:

Constant Field Values

LONG_VALUE_TYPE_OTHER_PAGE

private static final byte LONG_VALUE_TYPE_OTHER_PAGE

Long value (LVAL) type that indicates that the value is stored on another page

See Also:

Constant Field Values

LONG_VALUE_TYPE_OTHER_PAGES

private static final byte LONG_VALUE_TYPE_OTHER_PAGES

Long value (LVAL) type that indicates that the value is stored on multiple other pages

See Also:

Constant Field Values

LONG_VALUE_TYPE_MASK

private static final int LONG_VALUE_TYPE_MASK

Mask to apply the long length in order to get the flag bits (only the first 2 bits are type flags).

See Also:

Constant Field Values

_lvalBufferH

private LongValueColumnImpl.LongValueBufferHolder _lvalBufferH

Holds additional info for writing long values

Constructor Detail

LongValueColumnImpl

LongValueColumnImpl(ColumnImpl.InitArgs args)
             throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getOwnedPageCount

public int getOwnedPageCount()

Description copied from class: ColumnImpl

Returns the number of database pages owned by this column.

Overrides:

getOwnedPageCount in class ColumnImpl

setUsageMaps

void setUsageMaps(UsageMap ownedPages,
                  UsageMap freeSpacePages)

Description copied from class: ColumnImpl

Sets the usage maps for this column.

Overrides:

setUsageMaps in class ColumnImpl

postTableLoadInit

void postTableLoadInit()
                throws java.io.IOException

Description copied from class: ColumnImpl

Secondary column initialization after the table is fully loaded.

Overrides:

postTableLoadInit in class ColumnImpl

Throws:

java.io.IOException

getMaxLengthInUnits

protected int getMaxLengthInUnits()

read

public java.lang.Object read(byte[] data,
                             java.nio.ByteOrder order)
                      throws java.io.IOException

Description copied from class: ColumnImpl

Deserialize a raw byte value for this column into an Object

Overrides:

read in class ColumnImpl

Parameters:

data - The raw byte value

order - Byte order in which the raw value is stored

Returns:

The deserialized Object

Throws:

java.io.IOException

writeRealData

protected java.nio.ByteBuffer writeRealData(java.lang.Object obj,
                                            int remainingRowLength,
                                            java.nio.ByteOrder order)
                                     throws java.io.IOException

Overrides:

writeRealData in class ColumnImpl

Throws:

java.io.IOException

readLongValue

protected byte[] readLongValue(byte[] lvalDefinition)
                        throws java.io.IOException

Parameters:

lvalDefinition - Column value that points to an LVAL record

Returns:

The LVAL data

Throws:

java.io.IOException

readLongStringValue

private java.lang.String readLongStringValue(byte[] lvalDefinition)
                                      throws java.io.IOException

Parameters:

lvalDefinition - Column value that points to an LVAL record

Returns:

The LVAL data

Throws:

java.io.IOException

writeLongValue

protected java.nio.ByteBuffer writeLongValue(byte[] value,
                                             int remainingRowLength)
                                      throws java.io.IOException

Write an LVAL column into a ByteBuffer inline if it fits, otherwise in other data page(s).

Parameters:

value - Value of the LVAL column

Returns:

A buffer containing the LVAL definition and (possibly) the column value (unless written to other pages)

Throws:

java.io.IOException

writeLongValueHeader

private void writeLongValueHeader(java.nio.ByteBuffer lvalPage)

Writes the header info for a long value page.