org.apache.jackrabbit.vault.util

Class Text

java.lang.Object

org.apache.jackrabbit.vault.util.Text

public class Text
extends java.lang.Object

This Class provides some text related utilities

Field Summary

Fields

Modifier and Type	Field and Description
static char[]	hexTable used for the md5
static java.util.BitSet	URISave The list of characters that are not encoded by the escape() and unescape() METHODS.
static java.util.BitSet	URISaveEx Same as URISave but also contains the '/'

Method Summary

Modifier and Type	Method and Description
static java.lang.String	digest(java.lang.String algorithm, byte[] data) Digest the plain string using the given algorithm.
static java.lang.String	digest(java.lang.String algorithm, java.lang.String data, java.lang.String enc) Digest the plain string using the given algorithm.
static java.lang.String	encodeIllegalXMLCharacters(java.lang.String text) Replaces illegal XML characters in the given string by their corresponding predefined entity references.
static java.lang.String	escape(java.lang.String string) Does a URL encoding of the string.
static java.lang.String	escape(java.lang.String string, char escape) Does an URL encoding of the string using the escape character.
static java.lang.String	escape(java.lang.String string, char escape, boolean isPath) Does an URL encoding of the string using the escape character.
static java.lang.String	escapeIllegalJcrChars(java.lang.String name) Escapes all illegal JCR name characters of a string.
static java.lang.String	escapeIllegalXpathSearchChars(java.lang.String s) Escapes illegal XPath search characters at the end of a string.
static java.lang.String	escapePath(java.lang.String path) Does a URL encoding of the path.
static java.lang.String[]	explode(java.lang.String str, int ch) returns an array of strings decomposed of the original string, split at every occurrence of 'ch'.
static java.lang.String[]	explode(java.lang.String str, int ch, boolean respectEmpty) returns an array of strings decomposed of the original string, split at every occurance of 'ch'.
static java.lang.String	getAbsoluteParent(java.lang.String path, int level) Returns the nth absolute parent of the path, where n=level.
static java.lang.String	getLocalName(java.lang.String qname) Returns the local name of the given qname.
static java.lang.String	getName(java.lang.String path) Returns the name part of the path.
static java.lang.String	getName(java.lang.String path, boolean ignoreTrailingSlash) Same as getName(String) but adding the possibility to pass paths that end with a trailing '/'
static java.lang.String	getName(java.lang.String path, char delim) Returns the name part of the path, delimited by the given delim.
static java.lang.String	getNamespacePrefix(java.lang.String qname) Returns the namespace prefix of the given qname.
static java.lang.String	getRelativeParent(java.lang.String path, int level) Returns the nth relative parent of the path, where n=level.
static java.lang.String	getRelativeParent(java.lang.String path, int level, boolean ignoreTrailingSlash) Same as getRelativeParent(String, int) but adding the possibility to pass paths that end with a trailing '/'
static java.lang.String	implode(java.lang.String[] arr, java.lang.String delim) Concatenates all strings in the string array using the specified delimiter.
static boolean	isDescendant(java.lang.String path, java.lang.String descendant) Determines if the descendant path is hierarchical a descendant of path.
static boolean	isDescendantOrEqual(java.lang.String path, java.lang.String descendant) Determines if the descendant path is hierarchical a descendant of path or equal to it.
static boolean	isSibling(java.lang.String p1, java.lang.String p2) Determines, if two paths denote hierarchical siblins.
static java.lang.String	md5(java.lang.String data) Calculate an MD5 hash of the string given using 'utf-8' encoding.
static java.lang.String	md5(java.lang.String data, java.lang.String enc) Calculate an MD5 hash of the string given.
static java.lang.String	replace(java.lang.String text, java.lang.String oldString, java.lang.String newString) Replaces all occurrences of oldString in text with newString.
static java.lang.String	replaceVariables(java.util.Properties variables, java.lang.String value, boolean ignoreMissing) Performs variable replacement on the given string value.
static java.lang.String	unescape(java.lang.String string) Does a URL decoding of the string.
static java.lang.String	unescape(java.lang.String string, char escape) Does a URL decoding of the string using the escape character.
static java.lang.String	unescapeIllegalJcrChars(java.lang.String name) Unescapes previously escaped jcr chars.

Methods inherited from class java.lang.Object

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

Field Detail

hexTable

public static final char[] hexTable

used for the md5

URISave

public static java.util.BitSet URISave

The list of characters that are not encoded by the escape() and unescape() METHODS. They contains the characters as defined 'unreserved' in section 2.3 of the RFC 2396 'URI generic syntax':

 unreserved  = alphanum | mark
 mark        = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
 

URISaveEx

public static java.util.BitSet URISaveEx

Same as URISave but also contains the '/'

Method Detail

md5

public static java.lang.String md5(java.lang.String data,
                                   java.lang.String enc)
                            throws java.io.UnsupportedEncodingException

Calculate an MD5 hash of the string given.

Parameters:

data - the data to encode

enc - the character encoding to use

Returns:

a hex encoded string of the md5 digested input

Throws:

java.io.UnsupportedEncodingException - if the encoding is not supported

md5

public static java.lang.String md5(java.lang.String data)

Calculate an MD5 hash of the string given using 'utf-8' encoding.

Parameters:

data - the data to encode

Returns:

a hex encoded string of the md5 digested input

digest

public static java.lang.String digest(java.lang.String algorithm,
                                      java.lang.String data,
                                      java.lang.String enc)
                               throws java.security.NoSuchAlgorithmException,
                                      java.io.UnsupportedEncodingException

Digest the plain string using the given algorithm.

Parameters:

algorithm - The alogrithm for the digest. This algorithm must be supported by the MessageDigest class.

data - The plain text String to be digested.

enc - The character encoding to use

Returns:

The digested plain text String represented as Hex digits.

Throws:

java.security.NoSuchAlgorithmException - if the desired algorithm is not supported by the MessageDigest class.

java.io.UnsupportedEncodingException - if the encoding is not supported

digest

public static java.lang.String digest(java.lang.String algorithm,
                                      byte[] data)
                               throws java.security.NoSuchAlgorithmException

Digest the plain string using the given algorithm.

Parameters:

algorithm - The algorithm for the digest. This algorithm must be supported by the MessageDigest class.

data - the data to digest with the given algorithm

Returns:

The digested plain text String represented as Hex digits.

Throws:

java.security.NoSuchAlgorithmException - if the desired algorithm is not supported by the MessageDigest class.

explode

public static java.lang.String[] explode(java.lang.String str,
                                         int ch)

returns an array of strings decomposed of the original string, split at every occurrence of 'ch'. if 2 'ch' follow each other with no intermediate characters, empty "" entries are avoided.

Parameters:

str - the string to decompose

ch - the character to use a split pattern

Returns:

an array of strings

explode

public static java.lang.String[] explode(java.lang.String str,
                                         int ch,
                                         boolean respectEmpty)

returns an array of strings decomposed of the original string, split at every occurance of 'ch'.

Parameters:

str - the string to decompose

ch - the character to use a split pattern

respectEmpty - if true, empty elements are generated

Returns:

an array of strings

implode

public static java.lang.String implode(java.lang.String[] arr,
                                       java.lang.String delim)

Concatenates all strings in the string array using the specified delimiter.

Parameters:

arr - The String array

delim - The delimiter

Returns:

the concatenated string

replace

public static java.lang.String replace(java.lang.String text,
                                       java.lang.String oldString,
                                       java.lang.String newString)

Replaces all occurrences of oldString in text with newString.

Parameters:

text - The test to replace

oldString - old substring to be replaced with newString

newString - new substring to replace occurrences of oldString

Returns:

a string

encodeIllegalXMLCharacters

public static java.lang.String encodeIllegalXMLCharacters(java.lang.String text)

Replaces illegal XML characters in the given string by their corresponding predefined entity references.

Parameters:

text - text to be escaped

Returns:

a string

escape

public static java.lang.String escape(java.lang.String string,
                                      char escape)

Does an URL encoding of the string using the escape character. The characters that don't need encoding are those defined 'unreserved' in section 2.3 of the 'URI generic syntax' RFC 2396, but without the escape character.

Parameters:

string - the string to encode.

escape - the escape character.

Returns:

the escaped string

Throws:

java.lang.NullPointerException - if string is null.

escape

public static java.lang.String escape(java.lang.String string,
                                      char escape,
                                      boolean isPath)

Does an URL encoding of the string using the escape character. The characters that don't need encoding are those defined 'unreserved' in section 2.3 of the 'URI generic syntax' RFC 2396, but without the escape character. If isPath is true, additionally the slash '/' is ignored, too.

Parameters:

string - the string to encode.

escape - the escape character.

isPath - if true, the string is treated as path

Returns:

the escaped string

Throws:

java.lang.NullPointerException - if string is null.

escape

public static java.lang.String escape(java.lang.String string)

Does a URL encoding of the string. The characters that don't need encoding are those defined 'unreserved' in section 2.3 of the 'URI generic syntax' RFC 2396.

Parameters:

string - the string to encode

Returns:

the escaped string

Throws:

java.lang.NullPointerException - if string is null.

escapePath

public static java.lang.String escapePath(java.lang.String path)

Does a URL encoding of the path. The characters that don't need encoding are those defined 'unreserved' in section 2.3 of the 'URI generic syntax' RFC 2396. In contrast to the escape(String) method, not the entire path string is escaped, but every individual part (i.e. the slashes are not escaped).

Parameters:

path - the path to encode

Returns:

the escaped path

Throws:

java.lang.NullPointerException - if path is null.

unescape

public static java.lang.String unescape(java.lang.String string,
                                        char escape)

Does a URL decoding of the string using the escape character. Please note that in opposite to the URLDecoder it does not transform the + into spaces.

Parameters:

string - the string to decode

escape - the escape character

Returns:

the decoded string

Throws:

java.lang.NullPointerException - if string is null.

java.lang.IllegalArgumentException - if the 2 characters following the escape character do not represent a hex-number or if not enough characters follow an escape character

unescape

public static java.lang.String unescape(java.lang.String string)

Does a URL decoding of the string. Please note that in opposite to the URLDecoder it does not transform the + into spaces.

Parameters:

string - the string to decode

Returns:

the decoded string

Throws:

java.lang.NullPointerException - if string is null.

java.lang.ArrayIndexOutOfBoundsException - if not enough character follow an escape character

java.lang.IllegalArgumentException - if the 2 characters following the escape character do not represent a hex-number.

escapeIllegalJcrChars

public static java.lang.String escapeIllegalJcrChars(java.lang.String name)

Escapes all illegal JCR name characters of a string. The encoding is loosely modeled after URI encoding, but only encodes the characters it absolutely needs to in order to make the resulting string a valid JCR name. Use unescapeIllegalJcrChars(String) for decoding.

QName EBNF:

 simplename ::= onecharsimplename | twocharsimplename | threeormorecharname
 onecharsimplename ::= (* Any Unicode character except: '.', '/', ':', '[', ']', '*', '|' or any whitespace character *)
 twocharsimplename ::= '.' onecharsimplename | onecharsimplename '.' | onecharsimplename onecharsimplename
 threeormorecharname ::= nonspace string nonspace
 string ::= char | string char
 char ::= nonspace | ' '
 nonspace ::= (* Any Unicode character except: '/', ':', '[', ']', '*', '|' or any whitespace character *)
 

Parameters:

name - the name to escape

Returns:

the escaped name

escapeIllegalXpathSearchChars

public static java.lang.String escapeIllegalXpathSearchChars(java.lang.String s)

Escapes illegal XPath search characters at the end of a string.

Example:
A search string like 'test?' will run into a ParseException documented in http://issues.apache.org/jira/browse/JCR-1248

Parameters:

s - the string to encode

Returns:

the escaped string

unescapeIllegalJcrChars

public static java.lang.String unescapeIllegalJcrChars(java.lang.String name)

Unescapes previously escaped jcr chars.

Please note, that this does not exactly the same as the url related unescape(String), since it handles the byte-encoding differently.

Parameters:

name - the name to unescape

Returns:

the unescaped name

getName

public static java.lang.String getName(java.lang.String path)

Returns the name part of the path. If the given path is already a name (i.e. contains no slashes) it is returned.

Parameters:

path - the path

Returns:

the name part or null if path is null.

getName

public static java.lang.String getName(java.lang.String path,
                                       char delim)

Returns the name part of the path, delimited by the given delim. If the given path is already a name (i.e. contains no delim characters) it is returned.

Parameters:

path - the path

delim - the delimiter

Returns:

the name part or null if path is null.

getName

public static java.lang.String getName(java.lang.String path,
                                       boolean ignoreTrailingSlash)

Same as getName(String) but adding the possibility to pass paths that end with a trailing '/'

Parameters:

path - the path to get the name from

ignoreTrailingSlash - true to ignore the trailing slash

Returns:

the name

See Also:

getName(String)

getNamespacePrefix

public static java.lang.String getNamespacePrefix(java.lang.String qname)

Returns the namespace prefix of the given qname. If the prefix is missing, an empty string is returned. Please note, that this method does not validate the name or prefix.

the qname has the format: qname := [prefix ':'] local;

Parameters:

qname - a qualified name

Returns:

the prefix of the name or "".

Throws:

java.lang.NullPointerException - if qname is null

See Also:

getLocalName(String)

getLocalName

public static java.lang.String getLocalName(java.lang.String qname)

Returns the local name of the given qname. Please note, that this method does not validate the name.

the qname has the format: qname := [prefix ':'] local;

Parameters:

qname - a qualified name

Returns:

the localname

Throws:

java.lang.NullPointerException - if qname is null

See Also:

getNamespacePrefix(String)

isSibling

public static boolean isSibling(java.lang.String p1,
                                java.lang.String p2)

Determines, if two paths denote hierarchical siblins.

Parameters:

p1 - first path

p2 - second path

Returns:

true if on same level, false otherwise

isDescendant

public static boolean isDescendant(java.lang.String path,
                                   java.lang.String descendant)

Determines if the descendant path is hierarchical a descendant of path.

Parameters:

path - the current path

descendant - the potential descendant

Returns:

true if the descendant is a descendant; false otherwise.

isDescendantOrEqual

public static boolean isDescendantOrEqual(java.lang.String path,
                                          java.lang.String descendant)

Determines if the descendant path is hierarchical a descendant of path or equal to it.

Parameters:

path - the path to check

descendant - the potential descendant

Returns:

true if the descendant is a descendant or equal; false otherwise.

getRelativeParent

public static java.lang.String getRelativeParent(java.lang.String path,
                                                 int level)

Returns the n^th relative parent of the path, where n=level.

Example:
Text.getRelativeParent("/foo/bar/test", 1) == "/foo/bar"

Parameters:

path - the path of the page

level - the level of the parent

Returns:

the path of the relative parent

getRelativeParent

public static java.lang.String getRelativeParent(java.lang.String path,
                                                 int level,
                                                 boolean ignoreTrailingSlash)

Same as getRelativeParent(String, int) but adding the possibility to pass paths that end with a trailing '/'

Parameters:

path - The path.

level - The level if the parent.

ignoreTrailingSlash - true to ignore the trailing slash

Returns:

the path of hte paerent

See Also:

getRelativeParent(String, int)

getAbsoluteParent

public static java.lang.String getAbsoluteParent(java.lang.String path,
                                                 int level)

Returns the n^th absolute parent of the path, where n=level.

Example:
Text.getAbsoluteParent("/foo/bar/test", 1) == "/foo/bar"

Parameters:

path - the path of the page

level - the level of the parent

Returns:

the absolute parent path

replaceVariables

public static java.lang.String replaceVariables(java.util.Properties variables,
                                                java.lang.String value,
                                                boolean ignoreMissing)
                                         throws java.lang.IllegalArgumentException

Performs variable replacement on the given string value. Each ${...} sequence within the given value is replaced with the value of the named parser variable. If a variable is not found in the properties an IllegalArgumentException is thrown unless ignoreMissing is true. In the later case, the missing variable is replaced by the empty string.

Parameters:

variables - the variables to replace

value - the original value

ignoreMissing - if true, missing variables are replaced by the empty string.

Returns:

value after variable replacements

Throws:

java.lang.IllegalArgumentException - if the replacement of a referenced variable is not found