repicea.lang

Class REpiceaSystem

java.lang.Object

repicea.lang.REpiceaSystem

public class REpiceaSystem
extends java.lang.Object

The REpiceaSystem offers some additional features to the System class. Among others, it allows for dynamic classpath. The methods deliberately call the system class loader and add the path to the class path at this level.

Constructor Summary

Constructors

Constructor and Description
REpiceaSystem()

Method Summary

Modifier and Type	Method and Description
static void	addToClassPath(java.lang.String filename) Dynamically adds a directory or a JAR file to the class path.
static java.util.List<java.lang.String>	getClassPathURLs() Provides the different URLs in the class path.
static java.lang.String	getJavaArchitecture() Returns the architecture of the JVM, i.e.
static java.lang.String	getJavaIOTmpDir() This method returns the temporary input/output directory.
static java.lang.String	getJVMRevision() This method returns the revision of the virtual machine.
static java.lang.String	getJVMVersion() This method returns the version of the virtual machine.
static boolean	isCurrentJVMLaterThanThisVersion(java.lang.String targetJVM) This method returns true if the current version of the JVM is more recent than the parameter targetJVM.
static boolean	isCurrentJVMLaterThanThisVersion(java.lang.String targetJVM, boolean upToThirdDigit) This method returns true if the current version of the JVM is more recent than the parameter targetJVM
static boolean	isRunningOnWindows() Returns true if the OS is Windows or false otherwise.
static java.lang.String	retrieveArgument(java.lang.String option, java.util.List<java.lang.String> argumentList) This method scan the arguments for a particular option and returns the value of that option.
static java.util.List<java.lang.String>	setClassicalOptions(java.lang.String[] args) This static methods processes the arguments given to the main function in a very classical manner.
static void	setLanguageFromMain(java.lang.String[] args) This method scans the arguments given to the main method in order to set the language.
static void	setLanguageFromMain(java.lang.String[] args, REpiceaTranslator.Language defaultLanguage) This method scans the arguments given to the main method in order to set the language.

Methods inherited from class java.lang.Object

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

Constructor Detail

REpiceaSystem

public REpiceaSystem()

Method Detail

getJavaIOTmpDir

public static java.lang.String getJavaIOTmpDir()

This method returns the temporary input/output directory. It is preferable to the System.getProperty("java.io.tmpdir") method because it makes sure the path ends with a file separator.

Returns:

a String

setLanguageFromMain

public static void setLanguageFromMain(java.lang.String[] args,
                                       REpiceaTranslator.Language defaultLanguage)

This method scans the arguments given to the main method in order to set the language. Does not do anything if the arguments do not contain "-l" followed by the language code, typically "fr" for French

Parameters:

args - the arguments given to the main method

defaultLanguage - a default language can be null

setLanguageFromMain

public static void setLanguageFromMain(java.lang.String[] args)

This method scans the arguments given to the main method in order to set the language. Does not do anything if the arguments do not contain "-l" followed by the language code, typically "fr" for French

Parameters:

args - the arguments given to the main method

isCurrentJVMLaterThanThisVersion

public static boolean isCurrentJVMLaterThanThisVersion(java.lang.String targetJVM,
                                                       boolean upToThirdDigit)

This method returns true if the current version of the JVM is more recent than the parameter targetJVM

Parameters:

targetJVM - a String

upToThirdDigit - a boolean true to test up to the third digit

Returns:

a boolean

isCurrentJVMLaterThanThisVersion

public static boolean isCurrentJVMLaterThanThisVersion(java.lang.String targetJVM)

This method returns true if the current version of the JVM is more recent than the parameter targetJVM. The test is carried out on the first and second digit only. For instance, versions 1.7.12 and 1.7.17 would be equally recent.

Parameters:

targetJVM - a String

Returns:

a boolean

setClassicalOptions

public static java.util.List<java.lang.String> setClassicalOptions(java.lang.String[] args)

This static methods processes the arguments given to the main function in a very classical manner. The language is set if the args parameter contains -l followed by either en or fr. Then the arguments are returned as a List of String instances for further specific processing.

Parameters:

args - the input array of String instances

Returns:

a List of String instances

retrieveArgument

public static java.lang.String retrieveArgument(java.lang.String option,
                                                java.util.List<java.lang.String> argumentList)

This method scan the arguments for a particular option and returns the value of that option.

Parameters:

option - the option

argumentList - a List of String instances

Returns:

a String or null if the option was not found

getJVMVersion

public static java.lang.String getJVMVersion()

This method returns the version of the virtual machine.

Returns:

a String

getJVMRevision

public static java.lang.String getJVMRevision()

This method returns the revision of the virtual machine.

Returns:

a String

isRunningOnWindows

public static boolean isRunningOnWindows()

Returns true if the OS is Windows or false otherwise.

Returns:

a boolean

getJavaArchitecture

public static java.lang.String getJavaArchitecture()

Returns the architecture of the JVM, i.e. either 32-Bit, 64-Bit or unknown.

Returns:

a String

getClassPathURLs

public static java.util.List<java.lang.String> getClassPathURLs()
                                                         throws java.lang.Exception

Provides the different URLs in the class path.

Returns:

a List of String

Throws:

java.lang.Exception

addToClassPath

public static void addToClassPath(java.lang.String filename)
                           throws java.lang.Exception

Dynamically adds a directory or a JAR file to the class path. The JVM must implement the following option: --add-opens java.base/jdk.internal.loader=ALL-UNNAMED

Parameters:

filename - a String that stands for the filename.

Throws:

java.lang.Exception