Package org.vafer.jdeb.utils

Class Utils

java.lang.Object

org.vafer.jdeb.utils.Utils

public final class Utils
extends Object

Simple utils functions. ATTENTION: don't use outside of jdeb

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static String	convertToDebianVersion(String version, boolean apply, String envName, String template, Date timestamp)	Convert the project version to a version suitable for a Debian package.
static int	copy(InputStream pInput, OutputStream pOutput)
static String	defaultString(String str, String fallback)	Return fallback if first string is null or empty
static Collection<String>	getKnownPGPSecureRingLocations()	Get the known locations where the secure keyring can be located.
static File	guessKeyRingFile()	Tries to guess location of the user secure keyring using various heuristics.
static boolean	isBlank(CharSequence cs)	Check if a CharSequence is whitespace, empty ("") or null.
static boolean	isNullOrEmpty(String str)	Returns true if string is null or empty.
static String	joinLocalPath(String... paths)
static String	joinUnixPath(String... paths)
static String	lookupIfEmpty(String value, Map<String,String> props, String key)	Extracts value from map if given value is null.
static String	movePath(String file, String target)	Construct new path by replacing file directory part.
static String	replaceVariables(VariableResolver pResolver, String pExpression, String pOpen, String pClose)	Substitute the variables in the given expression with the values from the resolver
static String	stripLeadingSlash(String s)
static String	stripPath(int p, String s)
static String	toHex(byte[] bytes)
static byte[]	toUnixLineEndings(InputStream input)	Replaces new line delimiters in the input stream with the Unix line feed.

Methods inherited from class java.lang.Object

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

Constructor Details

Utils

public Utils()

Method Details

copy

public static int copy(InputStream pInput,
 OutputStream pOutput)
                throws IOException

Throws:

IOException

toHex

public static String toHex(byte[] bytes)

stripPath

public static String stripPath(int p,
 String s)

joinUnixPath

public static String joinUnixPath(String... paths)

joinLocalPath

public static String joinLocalPath(String... paths)

stripLeadingSlash

public static String stripLeadingSlash(String s)

replaceVariables

public static String replaceVariables(VariableResolver pResolver,
 String pExpression,
 String pOpen,
 String pClose)

Substitute the variables in the given expression with the values from the resolver

Parameters:

pResolver -

pExpression -

toUnixLineEndings

public static byte[] toUnixLineEndings(InputStream input)
                                throws IOException

Replaces new line delimiters in the input stream with the Unix line feed.

Parameters:

input -

Throws:

IOException

convertToDebianVersion

public static String convertToDebianVersion(String version,
 boolean apply,
 String envName,
 String template,
 Date timestamp)

Convert the project version to a version suitable for a Debian package. -SNAPSHOT suffixes are replaced with a timestamp (~yyyyMMddHHmmss). The separator before a rc, alpha or beta version is replaced with '~' such that the version is always ordered before the final or GA release.

Parameters:

version - the project version to convert to a Debian package version

template - the template used to replace -SNAPSHOT, the timestamp format is in brackets, the rest of the string is preserved (prefix[yyMMdd]suffix -> prefix151230suffix)

timestamp - the UTC date used as the timestamp to replace the SNAPSHOT suffix.

movePath

public static String movePath(String file,
 String target)

Construct new path by replacing file directory part. No files are actually modified.

Parameters:

file - path to move

target - new path directory

lookupIfEmpty

public static String lookupIfEmpty(String value,
 Map<String,String> props,
 String key)

Extracts value from map if given value is null.

Parameters:

value - current value

props - properties to extract value from

key - property name to extract

Returns:

initial value or value extracted from map

getKnownPGPSecureRingLocations

public static Collection<String> getKnownPGPSecureRingLocations()

Get the known locations where the secure keyring can be located. Looks through known locations of the GNU PG secure keyring.

Returns:

The location of the PGP secure keyring if it was found, null otherwise

guessKeyRingFile

public static File guessKeyRingFile()
                             throws FileNotFoundException

Tries to guess location of the user secure keyring using various heuristics.

Returns:

path to the keyring file

Throws:

FileNotFoundException - if no keyring file found

isNullOrEmpty

public static boolean isNullOrEmpty(String str)

Returns true if string is null or empty.

defaultString

public static String defaultString(String str,
 String fallback)

Return fallback if first string is null or empty

isBlank

public static boolean isBlank(CharSequence cs)

Check if a CharSequence is whitespace, empty ("") or null.

 StringUtils.isBlank(null)      = true
 StringUtils.isBlank("")        = true
 StringUtils.isBlank(" ")       = true
 StringUtils.isBlank("bob")     = false
 StringUtils.isBlank("  bob  ") = false
 

Parameters:

cs - the CharSequence to check, may be null

Returns:

true if the CharSequence is null, empty or whitespace