org.apache.poi.hpsf

Class ClassID

java.lang.Object

org.apache.poi.hpsf.ClassID

All Implemented Interfaces:

Duplicatable, GenericRecord

public class ClassID
extends Object
implements Duplicatable, GenericRecord

Represents a class ID (16 bytes). Unlike other little-endian type the ClassID is not just 16 bytes stored in the wrong order. Instead, it is a double word (4 bytes) followed by two words (2 bytes each) followed by 8 bytes.

The ClassID (or CLSID) is a UUID - see RFC 4122

Field Summary

Fields

Modifier and Type	Field and Description
static int	LENGTH The number of bytes occupied by this object in the byte stream.

Constructor Summary

Constructors

Constructor and Description
ClassID() Creates a ClassID and initializes its value with 0x00 bytes.
ClassID(byte[] src, int offset) Creates a ClassID and reads its value from a byte array.
ClassID(ClassID other) Clones the given ClassID
ClassID(LittleEndianInput lei) Reads the ClassID from the input
ClassID(String externalForm) Creates a ClassID from a human-readable representation of the Class ID in standard format "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}".

Method Summary

Modifier and Type	Method and Description
ClassID	copy()
boolean	equals(Object o) Checks whether this ClassID is equal to another object.
boolean	equalsInverted(ClassID o) Checks whether this ClassID is equal to another ClassID with inverted endianess, because there are apparently not only version 1 GUIDs (aka "network" with big-endian encoding), but also version 2 GUIDs (aka "native" with little-endian encoding) out there.
byte[]	getBytes() Gets the bytes making out the class ID.
Map<String,Supplier<?>>	getGenericProperties()
int	hashCode()
int	length()
byte[]	read(byte[] src, int offset) Reads the class ID's value from a byte array by turning little-endian into big-endian.
void	setBytes(byte[] bytes) Sets the bytes making out the class ID.
String	toString() Returns a human-readable representation of the Class ID in standard format "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}".
UUID	toUUID() Converts the ClassID to an UUID
String	toUUIDString() Returns a human-readable representation of the Class ID in UUID format "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".
void	write(byte[] dst, int offset) Writes the class ID to a byte array in the little-endian format.
void	write(LittleEndianOutput leo) Write the class ID to a LittleEndianOutput (stream)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.poi.common.usermodel.GenericRecord

getGenericChildren, getGenericRecordType

Field Detail

LENGTH

public static final int LENGTH

The number of bytes occupied by this object in the byte stream.

See Also:

Constant Field Values

Constructor Detail

ClassID

public ClassID(byte[] src,
               int offset)

Creates a ClassID and reads its value from a byte array.

Parameters:

src - The byte array to read from.

offset - The offset of the first byte to read.

ClassID

public ClassID()

Creates a ClassID and initializes its value with 0x00 bytes.

ClassID

public ClassID(ClassID other)

Clones the given ClassID

Parameters:

other - The ClassID to use a base for creating this one

ClassID

public ClassID(String externalForm)

Creates a ClassID from a human-readable representation of the Class ID in standard format "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}".

Parameters:

externalForm - representation of the Class ID represented by this object.

ClassID

public ClassID(LittleEndianInput lei)

Reads the ClassID from the input

Parameters:

lei - the input (stream)

Method Detail

length

public int length()

Returns:

The number of bytes occupied by this object in the byte stream.

getBytes

public byte[] getBytes()

Gets the bytes making out the class ID. They are returned in correct order, i.e. big-endian.

Returns:

the bytes making out the class ID.

setBytes

public void setBytes(byte[] bytes)

Sets the bytes making out the class ID.

Parameters:

bytes - The bytes making out the class ID in big-endian format. They are copied without their order being changed.

read

public byte[] read(byte[] src,
                   int offset)

Reads the class ID's value from a byte array by turning little-endian into big-endian.

Parameters:

src - The byte array to read from

offset - The offset within the src byte array

Returns:

A byte array containing the class ID.

write

public void write(byte[] dst,
                  int offset)
           throws ArrayStoreException

Writes the class ID to a byte array in the little-endian format.

Parameters:

dst - The byte array to write to.

offset - The offset within the dst byte array.

Throws:

ArrayStoreException - if there is not enough room for the class ID 16 bytes in the byte array after the offset position.

write

public void write(LittleEndianOutput leo)

Write the class ID to a LittleEndianOutput (stream)

Parameters:

leo - the output

equals

public boolean equals(Object o)

Checks whether this ClassID is equal to another object.

Overrides:

equals in class Object

Parameters:

o - the object to compare this ClassID with

Returns:

true if the objects are equal, else false.

equalsInverted

public boolean equalsInverted(ClassID o)

Checks whether this ClassID is equal to another ClassID with inverted endianess, because there are apparently not only version 1 GUIDs (aka "network" with big-endian encoding), but also version 2 GUIDs (aka "native" with little-endian encoding) out there.

Parameters:

o - the object to compare this ClassID with

Returns:

true if the objects are equal, else false.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Returns a human-readable representation of the Class ID in standard format "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}".

Overrides:

toString in class Object

Returns:

String representation of the Class ID represented by this object.

toUUIDString

public String toUUIDString()

Returns a human-readable representation of the Class ID in UUID format "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".

Returns:

UUID String representation of the Class ID represented by this object.

toUUID

public UUID toUUID()

Converts the ClassID to an UUID

Returns:

the ClassID as UUID

Since:

POI 5.0.0

copy

public ClassID copy()

Specified by:

copy in interface Duplicatable

Returns:

a deep copy of the implementing class / instance

getGenericProperties

public Map<String,Supplier<?>> getGenericProperties()

Specified by:

getGenericProperties in interface GenericRecord