Package com.google.gwt.util.tools

Class Utility

java.lang.Object
com.google.gwt.util.tools.Utility
public final class Utility extends Object
A smattering of useful functions.

  • Constructor Details

    • Utility

      public Utility()

  • Method Details

    • close

      public static void close(AutoCloseable closeable)
      Helper that ignores exceptions during close, because what are you going to do?

    • createNormalFile

      public static File createNormalFile(File parent, String fileName, boolean overwrite, boolean ignore) throws IOException
      Parameters:
      parent - Parent directory
      fileName - New file name
      overwrite - Is overwriting an existing file allowed?
      Returns:
      Handle to the file
      Throws:
      IOException - If the file cannot be created, or if the file already existed and overwrite was false.

    • getDirectory

      public static File getDirectory(File parent, String dirName, boolean create) throws IOException
      Parameters:
      parent - Parent directory of the requested directory.
      dirName - Requested name for the directory.
      create - Create the directory if it does not already exist?
      Returns:
      A File representing a directory that now exists.
      Throws:
      IOException - If the directory is not found and/or cannot be created.

    • getDirectory

      public static File getDirectory(String dirPath, boolean create) throws IOException
      Parameters:
      dirPath - Requested path for the directory.
      create - Create the directory if it does not already exist?
      Returns:
      A File representing a directory that now exists.
      Throws:
      IOException - If the directory is not found and/or cannot be created.

    • getFileFromClassPath

      public static String getFileFromClassPath(String partialPath) throws IOException
      Gets the contents of a file from the class path as a String. Note: this method is only guaranteed to work for resources in the same class loader that contains this Utility class.
      Parameters:
      partialPath - the partial path to the resource on the class path
      Returns:
      the contents of the file
      Throws:
      IOException - if the file could not be found or an error occurred while reading it

    • getInstallPath

      public static String getInstallPath()

    • makeTemporaryDirectory

      public static File makeTemporaryDirectory(File baseDir, String prefix) throws IOException
      Creates a randomly-named temporary directory.
      Parameters:
      baseDir - base directory to contain the new directory. May be null, in which case the directory given by the java.io.tmpdir system property will be used.
      prefix - the initial characters of the new directory name
      Returns:
      a newly-created temporary directory; the caller must delete this directory (either when done or on VM exit)
      Throws:
      IOException

    • streamOut

      public static void streamOut(InputStream in, OutputStream out, int bufferSize) throws IOException
      Throws:
      IOException

    • writeTemplateBinaryFile

      public static void writeTemplateBinaryFile(File file, byte[] contents) throws IOException
      Throws:
      IOException

    • writeTemplateFile

      public static void writeTemplateFile(File file, String contents, Map<String,String> replacements) throws IOException
      Throws:
      IOException

    • versionCompare

      public static int versionCompare(String v1, String v2)
      Handles comparison between version numbers (the right way(TM)). Examples of version strings: 1.6.7, 1.2_b10
      Parameters:
      v1 - the first version to compare.
      v2 - the second version to compare.
      Returns:
      a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
      Throws:
      IllegalArgumentException - if the version number are not proper (i.e. the do not comply with the following regular expression [0-9]+(.[0-9]+)*(_[a-zA-Z0-9]+)?