com.pega.pegarules.pub.util

Class PRFileUtil

java.lang.Object

com.pega.pegarules.pub.util.PRFileUtil

public class PRFileUtil
extends java.lang.Object

PRFileUtil is a utility to handle file encoding formats.

Version:

$Revision: 85565 $

Author:

dassu

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	COPYRIGHT
static java.lang.String	ENCODING_DOWNLOAD encoding to use when downloading files
static java.lang.String	ENCODING_EXTRACT encoding to use when extracting static content
static java.lang.String	ENCODING_ISO use ISO-8859-1 encoding
static java.lang.String	ENCODING_JAVA encoding to use with Java files
static java.lang.String	ENCODING_PLATFORM platform's default encoding
static java.lang.String	ENCODING_UPLOAD encoding to use when uploading files (ex: Attach)
static java.lang.String	ENCODING_XML encoding to use with XML files
static java.lang.String	JAVA_ENCODING_EBCDIC Java encoding name for EBCDIC
static java.lang.String	JAVA_ENCODING_ISO Java encoding name for ISO
static java.lang.String	JAVA_ENCODING_UTF16BE Java encoding name for UTF-16 Big Endian
static java.lang.String	JAVA_ENCODING_UTF16LE Java encoding name for UTF-16 Little Endian
static java.lang.String	JAVA_ENCODING_UTF8 Java encoding name for UTF-8
static byte[]	UTF8_BOM The UTF-8 byte order mark
static java.lang.String	VERSION

Constructor Summary

Constructors

Constructor and Description
PRFileUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	getBytes(java.io.InputStream aStream, int aBufferSize) Reads aBufferSize number of bytes from the specified InputStream.
static java.lang.String	getJavaEncoding(java.lang.String aEncodingType) Returns the java encoding for the specified encoding type.
static java.lang.String	guessDataContentFileType(java.lang.String aFileName)
static java.lang.String	guessEncoding(byte[] aBuffer, java.lang.String aEncodingType) Applies heuristics to detect the encoding of the specified byte buffer.
static java.lang.String	guessRuleFileType(java.lang.String aFileName) Get the class name based on file extension.
static java.lang.String	guessRuleFileType(java.lang.String aFileName, java.lang.String aFileExtension) Get the class name based on file extension.
static boolean	hasUTF16BEByteOrderMark(byte[] aBytes) Indicates that the specified byte array is tagged with a UTF16BE byte order mark.
static boolean	hasUTF16LEByteOrderMark(byte[] aBytes) Indicates that the specified byte array is tagged with a UTF16LE byte order mark.
static boolean	hasUTF8ByteOrderMark(byte[] aBytes) Indicates that the specified byte array is tagged with a UTF8 byte order mark.
static boolean	isDataContentCompressible(java.lang.String aDataContentType)
static java.lang.String	mapVariantsToJava(java.lang.String aVariant) Map one of the UTF-8 or ISO-8859-1 variants to the java encoding name - ISO8859_1 or UTF8

Methods inherited from class java.lang.Object

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

Field Detail

COPYRIGHT

public static final java.lang.String COPYRIGHT

See Also:

Constant Field Values

VERSION

public static final java.lang.String VERSION

ENCODING_JAVA

public static final java.lang.String ENCODING_JAVA

encoding to use with Java files

See Also:

Constant Field Values

ENCODING_UPLOAD

public static final java.lang.String ENCODING_UPLOAD

encoding to use when uploading files (ex: Attach)

See Also:

Constant Field Values

ENCODING_DOWNLOAD

public static final java.lang.String ENCODING_DOWNLOAD

encoding to use when downloading files

See Also:

Constant Field Values

ENCODING_EXTRACT

public static final java.lang.String ENCODING_EXTRACT

encoding to use when extracting static content

See Also:

Constant Field Values

ENCODING_PLATFORM

public static final java.lang.String ENCODING_PLATFORM

platform's default encoding

See Also:

Constant Field Values

ENCODING_ISO

public static final java.lang.String ENCODING_ISO

use ISO-8859-1 encoding

See Also:

Constant Field Values

ENCODING_XML

public static final java.lang.String ENCODING_XML

encoding to use with XML files

See Also:

Constant Field Values

JAVA_ENCODING_ISO

public static final java.lang.String JAVA_ENCODING_ISO

Java encoding name for ISO

See Also:

Constant Field Values

JAVA_ENCODING_EBCDIC

public static final java.lang.String JAVA_ENCODING_EBCDIC

Java encoding name for EBCDIC

See Also:

Constant Field Values

JAVA_ENCODING_UTF8

public static final java.lang.String JAVA_ENCODING_UTF8

Java encoding name for UTF-8

See Also:

Constant Field Values

JAVA_ENCODING_UTF16LE

public static final java.lang.String JAVA_ENCODING_UTF16LE

Java encoding name for UTF-16 Little Endian

See Also:

Constant Field Values

JAVA_ENCODING_UTF16BE

public static final java.lang.String JAVA_ENCODING_UTF16BE

Java encoding name for UTF-16 Big Endian

See Also:

Constant Field Values

UTF8_BOM

public static final byte[] UTF8_BOM

The UTF-8 byte order mark

Constructor Detail

PRFileUtil

public PRFileUtil()

Method Detail

getJavaEncoding

public static java.lang.String getJavaEncoding(java.lang.String aEncodingType)

Returns the java encoding for the specified encoding type. Recognized encoding types are PRFileUtil.ENCODING_* values. Defaults to UTF-8 encoding is no encoding type is specified.

Parameters:

aEncodingType - the encoding type

Returns:

The Java encoding for the specified encoding type

hasUTF8ByteOrderMark

public static boolean hasUTF8ByteOrderMark(byte[] aBytes)

Indicates that the specified byte array is tagged with a UTF8 byte order mark. The three byte BOM for UTF-8 is EF BB BF

Parameters:

aBytes - a byte buffer

Returns:

true if the specified byte array has a UTF8 byte order mark

hasUTF16LEByteOrderMark

public static boolean hasUTF16LEByteOrderMark(byte[] aBytes)

Indicates that the specified byte array is tagged with a UTF16LE byte order mark. The two byte BOM for UTF-16LE is FF FE

Parameters:

aBytes - a byte buffer

Returns:

true if the specified byte array has a UTF16LE byte order mark

hasUTF16BEByteOrderMark

public static boolean hasUTF16BEByteOrderMark(byte[] aBytes)

Indicates that the specified byte array is tagged with a UTF16BE byte order mark. The two byte BOM for UTF-16BE is FE FF

Parameters:

aBytes - a byte buffer

Returns:

true if the specified byte array has a UTF16BE byte order mark

guessEncoding

public static java.lang.String guessEncoding(byte[] aBuffer,
                             java.lang.String aEncodingType)
                                      throws java.io.IOException

Applies heuristics to detect the encoding of the specified byte buffer.

Parameters:

aBuffer - a byte buffer

aEncodingType -

Returns:

true if the specified byte array has a UTF16BE byte order mark

Throws:

java.io.IOException

getBytes

public static byte[] getBytes(java.io.InputStream aStream,
              int aBufferSize)
                       throws java.io.IOException

Reads aBufferSize number of bytes from the specified InputStream.

Parameters:

aStream - The stream from which to read the bytes

aBufferSize - The number of bytes to read from the stream. If not specified, aStream.available() bytes are read.

Returns:

the byte buffer read from the InputStream

Throws:

java.io.IOException

mapVariantsToJava

public static java.lang.String mapVariantsToJava(java.lang.String aVariant)

Map one of the UTF-8 or ISO-8859-1 variants to the java encoding name - ISO8859_1 or UTF8

Parameters:

aVariant -

Returns:

encoding name

guessRuleFileType

public static java.lang.String guessRuleFileType(java.lang.String aFileName,
                                 java.lang.String aFileExtension)

Get the class name based on file extension.

Parameters:

aFileExtension - extension of the file to be sent to the browser.

aFileName - name of the file without the extension part

Returns:

class type of the static resource if type is known else returns Rule-File-Binary.

guessRuleFileType

public static java.lang.String guessRuleFileType(java.lang.String aFileName)

Get the class name based on file extension.

Parameters:

aFileName - name of the file without the extension part

Returns:

class type of the static resource if type is known else returns Rule-File-Binary.

guessDataContentFileType

public static java.lang.String guessDataContentFileType(java.lang.String aFileName)

isDataContentCompressible

public static boolean isDataContentCompressible(java.lang.String aDataContentType)