Module imagingbook.core
Package imagingbook.core

Class FileUtils

java.lang.Object
imagingbook.core.FileUtils
public abstract class FileUtils extends Object
This class defines various static methods for managing file-based resources and JAR manifest files.

  • Constructor Details

  • Method Details

    • stripFileExtension

      public static String stripFileExtension(String name)
      Removes the extension part of a pathname. Examples:
      "foo.txt" → "foo", "foo" → "foo", "foo." → "foo.", ".txt" → ".txt".
      Parameters:
      name - the pathname
      Returns:
      the pathname without the extension (if valid)

    • getFileExtension

      public static String getFileExtension(String name)
      Extracts the extension part of a pathname as a string. Examples:
      "foo.txt" → "txt", "foo" → "", "foo." → "", ".txt" → "".
      Parameters:
      name - the pathname
      Returns:
      the extension or an empty string

    • getClassPath

      public static String getClassPath(Class<?> clazz)
      Find the path from which a given class was loaded.
      Parameters:
      clazz - a class.
      Returns:
      the path of the .class file for the given class or null (e.g. if the class is anonymous).

    • printClassPath

      public static void printClassPath()
      Lists (to System.out) the paths where classes are loaded from.

    • checkClass

      public static boolean checkClass(String classname)
      Checks 'by name' if a particular class exists.
      Parameters:
      classname - fully qualified name of the class, e.g. imagingbook.lib.util.FileUtils
      Returns:
      true if the class was found, false otherwise

    • copyToFile

      public static void copyToFile(InputStream in, File file) throws IOException
      Reads all data from the given input stream and copies them to to a file.
      Parameters:
      in - the input stream
      file - the output file
      Throws:
      IOException - if anything goes wrong

    • getJarManifest

      public static Manifest getJarManifest(Class<?> clazz)
      Finds the manifest (from META-INF/MANIFEST.MF) of the JAR file from which clazz was loaded. See: http://stackoverflow.com/a/1273432
      Parameters:
      clazz - A class in the JAR file of interest.
      Returns:
      A Manifest object or null if clazz was not loaded from a JAR file.

    • selectFolder

      public static File selectFolder(String startDirectory, String dialogTitle)
      Opens a dialog for the user to select a single folder (no files). Contained files and sub-folders are shown. Uses native (system) look-and-feel; original look-and-feel is restored.
      Parameters:
      startDirectory - the directory to start from (pass "" or "." for the current directory)
      dialogTitle - the string shown in the title bar of the dialog window
      Returns:
      a File object representing the selected directory or null if the dialog was canceled

    • setCurrentDirectory

      @Deprecated public static void setCurrentDirectory(String pathname)
      Deprecated.
      Sets a system property to memorize the current directory. Use getCurrentDirectory() to retrieve this value. If the specified pathname is not a directory (i.e., a plain file), its parent directory is used.
      Parameters:
      pathname - a directory of file path

    • setCurrentDirectory

      public static void setCurrentDirectory(Class<?> clazz, String pathname)
      Associates a current directory with the specified class by setting a system property to make this persistent through class reloads. Use getCurrentDirectory(Class) to retrieve this value. If the specified pathname is not a directory (i.e., a plain file), its parent directory is used.
      Parameters:
      clazz - the class to associate the directory with
      pathname - a directory of file path

    • setCurrentDirectory

      public static void setCurrentDirectory(Class<?> clazz, Path path)

    • getCurrentDirectory

      @Deprecated public static String getCurrentDirectory()
      Deprecated.
      Returns the current directory path. If the directory was set with setCurrentDirectory(String) before this path is returned, otherwise the value for the "user.dir" system property.
      Returns:
      a string with the current directory path

    • getCurrentDirectory

      public static String getCurrentDirectory(Class<?> clazz)
      Returns the current directory associated with the specified class. (usually of type PlugIn or PlugInFilter). If the directory was set with setCurrentDirectory(Class,String) before this path is returned, null otherwise.
      Parameters:
      clazz - the class to associate the directory with
      Returns:
      a string with the current directory path or null if not registered

    • getTempDirectory

      public static String getTempDirectory()

    • getModuleName

      public static String getModuleName(Class<?> clazz)

    • getModuleName2

      public static String getModuleName2(Class<?> clazz) throws URISyntaxException
      Throws:
      URISyntaxException

    • main

      public static void main(String[] args) throws URISyntaxException
      Throws:
      URISyntaxException