Package com.healthmarketscience.jackcess.impl

Class JetFormat

  • public abstract class JetFormat
extends Object
    Encapsulates constants describing a specific version of the Access Jet format
    Author:
    Tim McCune

    • Field Detail

      • MAX_RECORD_SIZE

        public static final int MAX_RECORD_SIZE
        Maximum size of a record minus OLE objects and Memo fields
        See Also:
        Constant Field Values

      • TEXT_FIELD_UNIT_SIZE

        public static final short TEXT_FIELD_UNIT_SIZE
        the "unit" size for text fields
        See Also:
        Constant Field Values

      • TEXT_FIELD_MAX_LENGTH

        public static final short TEXT_FIELD_MAX_LENGTH
        Maximum size of a text field
        See Also:
        Constant Field Values

      • OFFSET_ENGINE_NAME

        public static final int OFFSET_ENGINE_NAME
        location of the engine name in the header
        See Also:
        Constant Field Values

      • LENGTH_ENGINE_NAME

        public static final int LENGTH_ENGINE_NAME
        length of the engine name in the header
        See Also:
        Constant Field Values

      • VERSION_3

        public static final JetFormat VERSION_3
        the JetFormat constants for the Jet database version "3"

      • VERSION_4

        public static final JetFormat VERSION_4
        the JetFormat constants for the Jet database version "4"

      • VERSION_MSISAM

        public static final JetFormat VERSION_MSISAM
        the JetFormat constants for the MSISAM database

      • VERSION_12

        public static final JetFormat VERSION_12
        the JetFormat constants for the Jet database version "12.0"

      • VERSION_14

        public static final JetFormat VERSION_14
        the JetFormat constants for the Jet database version "14.0"

      • VERSION_16

        public static final JetFormat VERSION_16
        the JetFormat constants for the Jet database version "16.0"

      • VERSION_17

        public static final JetFormat VERSION_17
        the JetFormat constants for the Jet database version "17.0"

      • READ_ONLY

        public final boolean READ_ONLY
        the read/write mode of this format

      • INDEXES_SUPPORTED

        public final boolean INDEXES_SUPPORTED
        whether or not we can use indexes in this format

      • PAGE_SIZE

        public final int PAGE_SIZE
        Database page size in bytes

      • MAX_DATABASE_SIZE

        public final long MAX_DATABASE_SIZE

      • MAX_ROW_SIZE

        public final int MAX_ROW_SIZE

      • DATA_PAGE_INITIAL_FREE_SPACE

        public final int DATA_PAGE_INITIAL_FREE_SPACE

      • OFFSET_MASKED_HEADER

        public final int OFFSET_MASKED_HEADER

      • HEADER_MASK

        public final byte[] HEADER_MASK

      • OFFSET_HEADER_DATE

        public final int OFFSET_HEADER_DATE

      • OFFSET_PASSWORD

        public final int OFFSET_PASSWORD

      • SIZE_PASSWORD

        public final int SIZE_PASSWORD

      • OFFSET_SORT_ORDER

        public final int OFFSET_SORT_ORDER

      • SIZE_SORT_ORDER

        public final int SIZE_SORT_ORDER

      • OFFSET_CODE_PAGE

        public final int OFFSET_CODE_PAGE

      • OFFSET_ENCODING_KEY

        public final int OFFSET_ENCODING_KEY

      • OFFSET_NEXT_TABLE_DEF_PAGE

        public final int OFFSET_NEXT_TABLE_DEF_PAGE

      • OFFSET_NUM_ROWS

        public final int OFFSET_NUM_ROWS

      • OFFSET_NEXT_AUTO_NUMBER

        public final int OFFSET_NEXT_AUTO_NUMBER

      • OFFSET_NEXT_COMPLEX_AUTO_NUMBER

        public final int OFFSET_NEXT_COMPLEX_AUTO_NUMBER

      • OFFSET_TABLE_TYPE

        public final int OFFSET_TABLE_TYPE

      • OFFSET_MAX_COLS

        public final int OFFSET_MAX_COLS

      • OFFSET_NUM_VAR_COLS

        public final int OFFSET_NUM_VAR_COLS

      • OFFSET_NUM_COLS

        public final int OFFSET_NUM_COLS

      • OFFSET_NUM_INDEX_SLOTS

        public final int OFFSET_NUM_INDEX_SLOTS

      • OFFSET_NUM_INDEXES

        public final int OFFSET_NUM_INDEXES

      • OFFSET_OWNED_PAGES

        public final int OFFSET_OWNED_PAGES

      • OFFSET_FREE_SPACE_PAGES

        public final int OFFSET_FREE_SPACE_PAGES

      • OFFSET_INDEX_DEF_BLOCK

        public final int OFFSET_INDEX_DEF_BLOCK

      • SIZE_INDEX_COLUMN_BLOCK

        public final int SIZE_INDEX_COLUMN_BLOCK

      • SIZE_INDEX_INFO_BLOCK

        public final int SIZE_INDEX_INFO_BLOCK

      • OFFSET_COLUMN_TYPE

        public final int OFFSET_COLUMN_TYPE

      • OFFSET_COLUMN_NUMBER

        public final int OFFSET_COLUMN_NUMBER

      • OFFSET_COLUMN_ID

        public final int OFFSET_COLUMN_ID

      • OFFSET_COLUMN_PRECISION

        public final int OFFSET_COLUMN_PRECISION

      • OFFSET_COLUMN_SCALE

        public final int OFFSET_COLUMN_SCALE

      • OFFSET_COLUMN_SORT_ORDER

        public final int OFFSET_COLUMN_SORT_ORDER

      • OFFSET_COLUMN_CODE_PAGE

        public final int OFFSET_COLUMN_CODE_PAGE

      • OFFSET_COLUMN_COMPLEX_ID

        public final int OFFSET_COLUMN_COMPLEX_ID

      • OFFSET_COLUMN_FLAGS

        public final int OFFSET_COLUMN_FLAGS

      • OFFSET_COLUMN_EXT_FLAGS

        public final int OFFSET_COLUMN_EXT_FLAGS

      • OFFSET_COLUMN_LENGTH

        public final int OFFSET_COLUMN_LENGTH

      • OFFSET_COLUMN_VARIABLE_TABLE_INDEX

        public final int OFFSET_COLUMN_VARIABLE_TABLE_INDEX

      • OFFSET_COLUMN_FIXED_DATA_OFFSET

        public final int OFFSET_COLUMN_FIXED_DATA_OFFSET

      • OFFSET_COLUMN_FIXED_DATA_ROW_OFFSET

        public final int OFFSET_COLUMN_FIXED_DATA_ROW_OFFSET

      • OFFSET_TABLE_DEF_LOCATION

        public final int OFFSET_TABLE_DEF_LOCATION

      • OFFSET_ROW_START

        public final int OFFSET_ROW_START

      • OFFSET_USAGE_MAP_START

        public final int OFFSET_USAGE_MAP_START

      • OFFSET_USAGE_MAP_PAGE_DATA

        public final int OFFSET_USAGE_MAP_PAGE_DATA

      • OFFSET_REFERENCE_MAP_PAGE_NUMBERS

        public final int OFFSET_REFERENCE_MAP_PAGE_NUMBERS

      • OFFSET_FREE_SPACE

        public final int OFFSET_FREE_SPACE

      • OFFSET_NUM_ROWS_ON_DATA_PAGE

        public final int OFFSET_NUM_ROWS_ON_DATA_PAGE

      • MAX_NUM_ROWS_ON_DATA_PAGE

        public final int MAX_NUM_ROWS_ON_DATA_PAGE

      • OFFSET_INDEX_COMPRESSED_BYTE_COUNT

        public final int OFFSET_INDEX_COMPRESSED_BYTE_COUNT

      • OFFSET_INDEX_LEVEL

        public final int OFFSET_INDEX_LEVEL

      • OFFSET_INDEX_ENTRY_MASK

        public final int OFFSET_INDEX_ENTRY_MASK

      • OFFSET_PREV_INDEX_PAGE

        public final int OFFSET_PREV_INDEX_PAGE

      • OFFSET_NEXT_INDEX_PAGE

        public final int OFFSET_NEXT_INDEX_PAGE

      • OFFSET_CHILD_TAIL_INDEX_PAGE

        public final int OFFSET_CHILD_TAIL_INDEX_PAGE

      • SIZE_INDEX_DEFINITION

        public final int SIZE_INDEX_DEFINITION

      • SIZE_COLUMN_HEADER

        public final int SIZE_COLUMN_HEADER

      • SIZE_ROW_LOCATION

        public final int SIZE_ROW_LOCATION

      • SIZE_LONG_VALUE_DEF

        public final int SIZE_LONG_VALUE_DEF

      • MAX_INLINE_LONG_VALUE_SIZE

        public final int MAX_INLINE_LONG_VALUE_SIZE

      • MAX_LONG_VALUE_ROW_SIZE

        public final int MAX_LONG_VALUE_ROW_SIZE

      • MAX_COMPRESSED_UNICODE_SIZE

        public final int MAX_COMPRESSED_UNICODE_SIZE

      • SIZE_TDEF_HEADER

        public final int SIZE_TDEF_HEADER

      • SIZE_TDEF_TRAILER

        public final int SIZE_TDEF_TRAILER

      • SIZE_COLUMN_DEF_BLOCK

        public final int SIZE_COLUMN_DEF_BLOCK

      • SIZE_INDEX_ENTRY_MASK

        public final int SIZE_INDEX_ENTRY_MASK

      • SKIP_BEFORE_INDEX_FLAGS

        public final int SKIP_BEFORE_INDEX_FLAGS

      • SKIP_AFTER_INDEX_FLAGS

        public final int SKIP_AFTER_INDEX_FLAGS

      • SKIP_BEFORE_INDEX_SLOT

        public final int SKIP_BEFORE_INDEX_SLOT

      • SKIP_AFTER_INDEX_SLOT

        public final int SKIP_AFTER_INDEX_SLOT

      • SKIP_BEFORE_INDEX

        public final int SKIP_BEFORE_INDEX

      • SIZE_NAME_LENGTH

        public final int SIZE_NAME_LENGTH

      • SIZE_ROW_COLUMN_COUNT

        public final int SIZE_ROW_COLUMN_COUNT

      • SIZE_ROW_VAR_COL_OFFSET

        public final int SIZE_ROW_VAR_COL_OFFSET

      • USAGE_MAP_TABLE_BYTE_LENGTH

        public final int USAGE_MAP_TABLE_BYTE_LENGTH

      • MAX_COLUMNS_PER_TABLE

        public final int MAX_COLUMNS_PER_TABLE

      • MAX_INDEXES_PER_TABLE

        public final int MAX_INDEXES_PER_TABLE

      • MAX_TABLE_NAME_LENGTH

        public final int MAX_TABLE_NAME_LENGTH

      • MAX_COLUMN_NAME_LENGTH

        public final int MAX_COLUMN_NAME_LENGTH

      • MAX_INDEX_NAME_LENGTH

        public final int MAX_INDEX_NAME_LENGTH

      • LEGACY_NUMERIC_INDEXES

        public final boolean LEGACY_NUMERIC_INDEXES

      • CHARSET

        public final Charset CHARSET

      • PROPERTY_MAP_TYPE

        public final byte[] PROPERTY_MAP_TYPE

      • SIZE_TEXT_FIELD_UNIT

        public final int SIZE_TEXT_FIELD_UNIT

    • Method Detail

      • getFormat

        public static JetFormat getFormat​(FileChannel channel)
                           throws IOException
        Parameters:
        channel - the database file.
        Returns:
        The Jet Format represented in the passed-in file
        Throws:
        IOException - if the database file format is unsupported.

      • isSupportedDataType

        public abstract boolean isSupportedDataType​(DataType type)

      • isSupportedCalculatedDataType

        public abstract boolean isSupportedCalculatedDataType​(DataType type)