Package org.c02e.jpgpj.util

Class FileDetection

java.lang.Object

org.c02e.jpgpj.util.FileDetection

public class FileDetection
extends java.lang.Object

File detection utilities.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FileDetection.ContainerType
static class	FileDetection.DetectionResult

Field Summary

Fields

Modifier and Type	Field	Description
protected static int	SCAN_AHEAD

Constructor Summary

Constructors

Constructor	Description
FileDetection()

Method Summary

Modifier and Type	Method	Description
static FileDetection.DetectionResult	detectContainer(java.io.InputStream stream)	Scans the first few bytes of the specified input stream, and tries to determine if it's a known PGP container format.
static FileDetection.DetectionResult	detectContainer(java.io.InputStream stream, int bufferSize)	Scans the first few bytes of the specified input stream, and tries to determine if it's a known PGP container format.
protected static boolean	isAllArmor(byte[] buf)
protected static boolean	isArmorByte(byte b)

Methods inherited from class java.lang.Object

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

Field Detail

SCAN_AHEAD

protected static final int SCAN_AHEAD

See Also:

Constant Field Values

Constructor Detail

FileDetection

public FileDetection()

Method Detail

detectContainer

public static FileDetection.DetectionResult detectContainer(java.io.InputStream stream)
                                                     throws java.io.IOException

Scans the first few bytes of the specified input stream, and tries to determine if it's a known PGP container format. Since this function reads the first few bytes from the passed input stream, it will pass back a reference to another input stream as part of the detection result. Use the returned stream to read from the start of the original stream. (If the original input stream supports marking and reseting, it will be reset and passed back; otherwise it will be wrapped with a new buffered input stream, and the wrapper stream will be passed back.)

Parameters:

stream - Input stream to check.

Returns:

Detection result, including likely container type, and the wrapper input stream.

Throws:

java.io.IOException

detectContainer

public static FileDetection.DetectionResult detectContainer(java.io.InputStream stream,
                                                            int bufferSize)
                                                     throws java.io.IOException

Scans the first few bytes of the specified input stream, and tries to determine if it's a known PGP container format. Since this function reads the first few bytes from the passed input stream, it will pass back a reference to another input stream as part of the detection result. Use the returned stream to read from the start of the original stream. (If the original input stream supports marking and reseting, it will be reset and passed back; otherwise it will be wrapped with a new buffered input stream, and the wrapper stream will be passed back.)

Parameters:

stream - Input stream to check.

bufferSize - Size of buffer to create if the input stream does not support marking and resetting.

Returns:

Detection result, including likely container type, and the wrapper input stream.

Throws:

java.io.IOException

isAllArmor

protected static boolean isAllArmor(byte[] buf)

isArmorByte

protected static boolean isArmorByte(byte b)