org.opencastproject.util

Class Checksum

java.lang.Object

org.opencastproject.util.Checksum

All Implemented Interfaces:

Serializable

public final class Checksum
extends Object
implements Serializable

This class stores value and type of a generated checksum.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected ChecksumType	type The checksum type
protected String	value The checksum value

Constructor Summary

Constructors

Constructor and Description
Checksum() Needed by JAXB

Method Summary

Modifier and Type	Method and Description
static String	convertToHex(byte[] data) Converts the checksum to a hex string.
static Checksum	create(ChecksumType type, File file) Creates a checksum of type type from the given file.
static Checksum	create(ChecksumType type, InputStream is) Creates a checksum of type type from the given input stream.
static Checksum	create(ChecksumType type, String value) Creates a checksum of type type and value value.
static Checksum	create(String type, String value) Creates a checksum of type type and value value.
static Checksum	createFor(ChecksumType type, String string) Create a checksum of type type for the given string.
boolean	equals(Object obj)
static Checksum	fromString(String checksum) Creates a checksum from a string in the form "value (type)".
ChecksumType	getType() Returns the checksum type.
String	getValue() Returns the checksum value.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

value

protected String value

The checksum value

type

protected ChecksumType type

The checksum type

Constructor Detail

Checksum

public Checksum()

Needed by JAXB

Method Detail

getType

public ChecksumType getType()

Returns the checksum type.

Returns:

the type

getValue

public String getValue()

Returns the checksum value.

Returns:

the value

convertToHex

public static String convertToHex(byte[] data)

Converts the checksum to a hex string.

Parameters:

data - the digest

Returns:

the digest hex representation

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

fromString

public static Checksum fromString(String checksum)
                           throws NoSuchAlgorithmException

Creates a checksum from a string in the form "value (type)".

Parameters:

checksum - the checksum in string form

Returns:

the checksum

Throws:

NoSuchAlgorithmException - if the checksum of the specified type cannot be created

create

public static Checksum create(String type,
                              String value)
                       throws NoSuchAlgorithmException

Creates a checksum of type type and value value.

Parameters:

type - the checksum type name

value - the checksum value

Returns:

the checksum

Throws:

NoSuchAlgorithmException - if the checksum of the specified type cannot be created

create

public static Checksum create(ChecksumType type,
                              String value)

Creates a checksum of type type and value value.

Parameters:

type - the checksum type

value - the checksum value

Returns:

the checksum

create

public static Checksum create(ChecksumType type,
                              File file)
                       throws IOException

Creates a checksum of type type from the given file.

Parameters:

type - the checksum type

file - the file

Returns:

the checksum

Throws:

IOException - if the file cannot be accessed

create

public static Checksum create(ChecksumType type,
                              InputStream is)
                       throws IOException

Creates a checksum of type type from the given input stream. The stream gets closed afterwards.

Throws:

IOException

createFor

public static Checksum createFor(ChecksumType type,
                                 String string)
                          throws IOException

Create a checksum of type type for the given string.

Throws:

IOException