com.healthmarketscience.jackcess.impl

Class PropertyMaps.Handler

java.lang.Object

com.healthmarketscience.jackcess.impl.PropertyMaps.Handler

Enclosing class:

PropertyMaps

static final class PropertyMaps.Handler
extends java.lang.Object

Utility class for reading/writing property blocks.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	PropertyMaps.Handler.BooleanPropColumn Normal boolean columns do not write into the actual row data, so we need to do a little extra work.
private class	PropertyMaps.Handler.PropColumn Column adapted to work w/out a Table.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<DataType,PropertyMaps.Handler.PropColumn>	_columns cache of PropColumns used to read/write property values
private DatabaseImpl	_database the current database
private ColumnImpl	_propCol the system table "property" column

Constructor Summary

Constructors

Constructor and Description
Handler(DatabaseImpl database)

Method Summary

Modifier and Type	Method and Description
private PropertyMaps.Handler.PropColumn	getColumn(DataType dataType, java.lang.String propName, int dataSize, java.lang.Object value) Gets a PropColumn capable of reading/writing a property of the given DataType
private static boolean	isPseudoGuidColumn(DataType dataType, java.lang.String propName, int dataSize, java.lang.Object value)
PropertyMaps	read(byte[] propBytes, int objectId, RowIdImpl rowId)
private java.util.List<java.lang.String>	readPropertyNames(java.nio.ByteBuffer bbBlock)
private PropertyMapImpl	readPropertyValues(java.nio.ByteBuffer bbBlock, java.util.List<java.lang.String> propNames, short blockType, PropertyMaps maps)
private java.lang.String	readPropName(java.nio.ByteBuffer buffer) Reads a property name from the given data block
void	save(PropertyMaps maps) Saves PropertyMaps instance to the db.
byte[]	write(PropertyMaps maps)
private void	writeBlock(PropertyMapImpl propMap, java.util.Set<java.lang.String> propNames, short blockType, ByteArrayBuilder bab)
private void	writePropertyNames(java.util.Set<java.lang.String> propNames, ByteArrayBuilder bab)
private void	writePropertyValues(PropertyMapImpl propMap, java.util.Set<java.lang.String> propNames, ByteArrayBuilder bab)
private void	writePropName(java.lang.String propName, ByteArrayBuilder bab) Writes a property name to the given data block

Methods inherited from class java.lang.Object

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

Field Detail

_database

private final DatabaseImpl _database

the current database

_propCol

private final ColumnImpl _propCol

the system table "property" column

_columns

private final java.util.Map<DataType,PropertyMaps.Handler.PropColumn> _columns

cache of PropColumns used to read/write property values

Constructor Detail

Handler

Handler(DatabaseImpl database)

Method Detail

read

public PropertyMaps read(byte[] propBytes,
                         int objectId,
                         RowIdImpl rowId)
                  throws java.io.IOException

Returns:

a PropertyMaps instance decoded from the given bytes (always returns non-null result).

Throws:

java.io.IOException

write

public byte[] write(PropertyMaps maps)
             throws java.io.IOException

Returns:

a byte[] encoded from the given PropertyMaps instance

Throws:

java.io.IOException

save

public void save(PropertyMaps maps)
          throws java.io.IOException

Saves PropertyMaps instance to the db.

Throws:

java.io.IOException

writeBlock

private void writeBlock(PropertyMapImpl propMap,
                        java.util.Set<java.lang.String> propNames,
                        short blockType,
                        ByteArrayBuilder bab)
                 throws java.io.IOException

Throws:

java.io.IOException

readPropertyNames

private java.util.List<java.lang.String> readPropertyNames(java.nio.ByteBuffer bbBlock)

Returns:

the property names parsed from the given data chunk

writePropertyNames

private void writePropertyNames(java.util.Set<java.lang.String> propNames,
                                ByteArrayBuilder bab)

readPropertyValues

private PropertyMapImpl readPropertyValues(java.nio.ByteBuffer bbBlock,
                                           java.util.List<java.lang.String> propNames,
                                           short blockType,
                                           PropertyMaps maps)
                                    throws java.io.IOException

Returns:

the PropertyMap created from the values parsed from the given data chunk combined with the given property names

Throws:

java.io.IOException

writePropertyValues

private void writePropertyValues(PropertyMapImpl propMap,
                                 java.util.Set<java.lang.String> propNames,
                                 ByteArrayBuilder bab)
                          throws java.io.IOException

Throws:

java.io.IOException

readPropName

private java.lang.String readPropName(java.nio.ByteBuffer buffer)

Reads a property name from the given data block

writePropName

private void writePropName(java.lang.String propName,
                           ByteArrayBuilder bab)

Writes a property name to the given data block

getColumn

private PropertyMaps.Handler.PropColumn getColumn(DataType dataType,
                                                  java.lang.String propName,
                                                  int dataSize,
                                                  java.lang.Object value)
                                           throws java.io.IOException

Gets a PropColumn capable of reading/writing a property of the given DataType

Throws:

java.io.IOException

isPseudoGuidColumn

private static boolean isPseudoGuidColumn(DataType dataType,
                                          java.lang.String propName,
                                          int dataSize,
                                          java.lang.Object value)
                                   throws java.io.IOException

Throws:

java.io.IOException