org.jmrtd.lds

Class DataGroup

java.lang.Object

org.jmrtd.lds.DataGroup

All Implemented Interfaces:

java.io.Serializable, LDSElement, LDSFile

Direct Known Subclasses:

COMFile, DG11File, DG12File, DG14File, DG15File, DG1File, DG2File, DG3File, DG4File, DG5File, DG6File, DG7File, SODFile

public abstract class DataGroup
extends java.lang.Object

Base class for data group files.

Version:

$Revision: 1559 $

Author:

The JMRTD team ([email protected])

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.jmrtd.lds.LDSFile

EF_COM_TAG, EF_DG1_TAG, EF_DG10_TAG, EF_DG11_TAG, EF_DG12_TAG, EF_DG13_TAG, EF_DG14_TAG, EF_DG15_TAG, EF_DG16_TAG, EF_DG2_TAG, EF_DG3_TAG, EF_DG4_TAG, EF_DG5_TAG, EF_DG6_TAG, EF_DG7_TAG, EF_DG8_TAG, EF_DG9_TAG, EF_SOD_TAG

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DataGroup(int dataGroupTag, java.io.InputStream inputStream) Constructs a data group from the DER encoded data in the given input stream.

Method Summary

Modifier and Type	Method and Description
byte[]	getEncoded() Gets the contents of this file as byte array, includes the ICAO tag and length.
int	getLength() The length of the value of the data group.
int	getTag() The data group tag.
protected abstract void	readContent(java.io.InputStream inputStream) Reads the contents of the data group from an input stream.
protected void	readObject(java.io.InputStream inputStream) Reads the contents of this data group, including tag and length from an input stream.
java.lang.String	toString() Gets a textual representation of this file.
protected abstract void	writeContent(java.io.OutputStream outputStream) Writes the contents of the data group to an output stream.
protected void	writeObject(java.io.OutputStream outputStream) Writes the file to an output stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataGroup

protected DataGroup(int dataGroupTag,
                    java.io.InputStream inputStream)
             throws java.io.IOException

Constructs a data group from the DER encoded data in the given input stream. Tag and length are read, so the input stream is positioned just before the value.

Parameters:

dataGroupTag - data group tag

inputStream - an input stream

Throws:

java.io.IOException - on error reading input stream

Method Detail

readObject

protected void readObject(java.io.InputStream inputStream)
                   throws java.io.IOException

Reads the contents of this data group, including tag and length from an input stream.

Parameters:

inputStream - the stream to read from

Throws:

java.io.IOException - if reading from the stream fails

writeObject

protected void writeObject(java.io.OutputStream outputStream)
                    throws java.io.IOException

Writes the file to an output stream.

Parameters:

outputStream - the output stream to write to

Throws:

java.io.IOException - if writing fails

readContent

protected abstract void readContent(java.io.InputStream inputStream)
                             throws java.io.IOException

Reads the contents of the data group from an input stream. Client code implementing this method should only read the contents from the input stream, not the tag or length of the data group.

Parameters:

inputStream - the input stream to read from

Throws:

java.io.IOException - on error reading from input stream

writeContent

protected abstract void writeContent(java.io.OutputStream outputStream)
                              throws java.io.IOException

Writes the contents of the data group to an output stream. Client code implementing this method should only write the contents to the output stream, not the tag or length of the data group.

Parameters:

outputStream - the output stream to write to

Throws:

java.io.IOException - on error writing to output stream

toString

public java.lang.String toString()

Gets a textual representation of this file.

Overrides:

toString in class java.lang.Object

Returns:

a textual representation of this file

getTag

public int getTag()

The data group tag.

Returns:

the tag of the data group

getLength

public int getLength()

The length of the value of the data group.

Returns:

the length of the value of the data group

getEncoded

public byte[] getEncoded()

Gets the contents of this file as byte array, includes the ICAO tag and length.

Specified by:

getEncoded in interface LDSElement

Returns:

a byte array containing the file