de.griefed.serverpackcreator.utilities.commonutilities

Class JarUtilities

java.lang.Object

de.griefed.serverpackcreator.utilities.commonutilities.JarUtilities

public class JarUtilities
extends java.lang.Object

Some utilities used across ServerPackCreator, revolving around interacting with JAR-files.

Constructor Summary

Constructors

Constructor and Description
JarUtilities()

Method Summary

Modifier and Type	Method and Description
void	copyFileFromJar(java.io.File fileToCopy, boolean replace, java.lang.Class<?> classToCopyFrom) Copy a file from inside our JAR-file to the host filesystem.
void	copyFileFromJar(java.io.File fileToCopy, java.lang.Class<?> classToCopyFrom) Copy a file from inside our JAR-file to the host filesystem.
void	copyFolderFromJar(java.lang.Class<?> classToRetrieveHomeFor, java.lang.String directoryToCopy, java.lang.String destinationDirectory, java.lang.String jarDirectoryPrefix, java.lang.String fileEnding) Copy a folder from inside a JAR-file to the host filesystem.
org.springframework.boot.system.ApplicationHome	getApplicationHomeForClass(java.lang.Class<?> classToRetrieveHomeFor) Retrieve the ApplicationHome for a given class.
java.util.HashMap<java.lang.String,java.lang.String>	systemInformation(org.springframework.boot.system.ApplicationHome applicationHome) Retrieve information about the environment for the given instance of ApplicationHome, stored in a HashMap. Available key-value-pairs: jarPath - The path to the JAR-file. jarName - The name of the JAR-file. javaVersion - The version of the Java installation used. osArch - Architecture of the system. osName - Name of the operating system. osVersion - Version of the operating system.

Methods inherited from class java.lang.Object

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

Constructor Detail

JarUtilities

public JarUtilities()

Method Detail

copyFileFromJar

public void copyFileFromJar(java.io.File fileToCopy,
                            boolean replace,
                            java.lang.Class<?> classToCopyFrom)

Copy a file from inside our JAR-file to the host filesystem. The file will create exactly as specified in the parameter.
Example:
copyFileFromJar(new File("log4j2.xml")) will result in the log4j2.xml file from inside the JAR-file to be copied to the outside of the JAR-file as log4j2.xml

Parameters:

fileToCopy - File. The source-file in the JAR you wish to copy outside the JAR.

replace - Boolean. Whether to replace the file, if it already exists.

classToCopyFrom - Class. The class of the JAR from which you want to copy from.

copyFileFromJar

public void copyFileFromJar(java.io.File fileToCopy,
                            java.lang.Class<?> classToCopyFrom)

Copy a file from inside our JAR-file to the host filesystem. The file will create exactly as specified in the parameter.
Example:
copyFileFromJar(new File("log4j2.xml")) will result in the log4j2.xml file from inside the JAR-file to be copied to the outside of the JAR-file as log4j2.xml

Parameters:

fileToCopy - File. The source-file in the JAR you wish to copy outside the JAR.

classToCopyFrom - Class. The class of the JAR from which to get the resource.

getApplicationHomeForClass

public org.springframework.boot.system.ApplicationHome getApplicationHomeForClass(java.lang.Class<?> classToRetrieveHomeFor)

Retrieve the ApplicationHome for a given class.

Parameters:

classToRetrieveHomeFor - Class. The class to retrieve the ApplicationHome for.

Returns:

ApplicationHome. An instance of ApplicationHome for the given class.

systemInformation

public java.util.HashMap<java.lang.String,java.lang.String> systemInformation(org.springframework.boot.system.ApplicationHome applicationHome)

Retrieve information about the environment for the given instance of ApplicationHome, stored in a HashMap.
Available key-value-pairs:
jarPath - The path to the JAR-file.
jarName - The name of the JAR-file.
javaVersion - The version of the Java installation used.
osArch - Architecture of the system.
osName - Name of the operating system.
osVersion - Version of the operating system.

Parameters:

applicationHome - Instance of ApplicationHome from which to gather information about the JAR-file and system.

Returns:

HashMap String-String. A hashmap containing key-value-pairs with information about the JAR-file and system.

copyFolderFromJar

public void copyFolderFromJar(java.lang.Class<?> classToRetrieveHomeFor,
                              java.lang.String directoryToCopy,
                              java.lang.String destinationDirectory,
                              java.lang.String jarDirectoryPrefix,
                              java.lang.String fileEnding)
                       throws java.io.IOException

Copy a folder from inside a JAR-file to the host filesystem. The specified folder will be copied, along with all resources inside it, recursively, to the specified destination.

Parameters:

classToRetrieveHomeFor - String. Path to either the JAR-file from which to copy a folder from, or to the class when running in a dev-environment. This parameter decides whether copyFolderFromJar(Class,String, String, String) or copyFolderFromJar(JarFile, String, String, String, String) is called.
Example for JAR-file: /home/griefed/serverpackcreator/serverpackcreator.jar
Example for dev-environment: G:/GitLab/ServerPackCreator/build/classes/java/main
See Main.main(String[]) source code for an example on how this is acquired automatically.

directoryToCopy - String. Path to the directory inside the JAR-file you want to copy.

destinationDirectory - String. Path to the destination directory you want to copy source to.

jarDirectoryPrefix - String. A prefix to remove when checking for existence of source inside the JAR-file. For example, the ServerPackCreator files inside it's JAR-File are located in BOOT-INF/classes due to SpringBoot. In order to correctly scan for source, we need to remove that prefix, so we receive a path that looks like a regular path inside a JAR-file.

fileEnding - String. The file-ending to filter for.

Throws:

java.io.IOException - Exception thrown if a file can not be accessed, found or otherwise worked with.