Package com.twelvemonkeys.lang

Class SystemUtil

java.lang.Object
com.twelvemonkeys.lang.SystemUtil
public final class SystemUtil extends Object
A utility class with some useful system-related functions.

NOTE: This class is not considered part of the public API and may be changed without notice

Version:
$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/lang/SystemUtil.java#3 $
Author:
Harald Kuhr, last modified by $Author: haku $

  • Field Details

    • XML_PROPERTIES

      public static String XML_PROPERTIES
      ".xml"

    • STD_PROPERTIES

      public static String STD_PROPERTIES
      ".properties"

  • Method Details

    • loadProperties

      public static Properties loadProperties(Class pClass, String pName) throws IOException
      Utility method for loading a named properties-file for a class.

      The properties-file is loaded through either:

      1. The given class' class loader (from classpath)
      2. Or, the system class loader (from classpath)
      3. Or, if it cannot be found in the classpath, an attempt to read from the current directory (or full path if given).

      Both normal java.util.Properties and com.twelvemonkeys.util.XMLProperties are supported (XML-properties must have ".xml" as its file extension).

      Parameters:
      pClass - The class to load properties for. If this parameter is null, the method will work exactly as loadProperties(String)
      pName - The name of the properties-file. If this parameter is null, the method will work exactly as loadProperties(Class)
      Returns:
      A Properties mapping read from the given file or for the given class.
      Throws:
      NullPointerException - if both pName and pClass paramters are null
      IOException - if an error occurs during load.
      FileNotFoundException - if no properties-file could be found.
      See Also:

    • loadProperties

      public static Properties loadProperties(Class pClass) throws IOException
      Utility method for loading a properties-file for a given class. The properties are searched for on the form "com/package/ClassName.properties" or "com/package/ClassName.xml".

      The properties-file is loaded through either:

      1. The given class' class loader (from classpath)
      2. Or, the system class loader (from classpath)
      3. Or, if it cannot be found in the classpath, an attempt to read from the current directory (or full path if given).

      Both normal java.util.Properties and com.twelvemonkeys.util.XMLProperties are supported (XML-properties must have ".xml" as its file extension).

      Parameters:
      pClass - The class to load properties for
      Returns:
      A Properties mapping for the given class.
      Throws:
      NullPointerException - if the pClass paramters is null
      IOException - if an error occurs during load.
      FileNotFoundException - if no properties-file could be found.
      See Also:

    • loadProperties

      public static Properties loadProperties(String pName) throws IOException
      Utility method for loading a named properties-file.

      The properties-file is loaded through either:

      1. The system class loader (from classpath)
      2. Or, if it cannot be found in the classpath, an attempt to read from the current directory.

      Both normal java.util.Properties and com.twelvemonkeys.util.XMLProperties are supported (XML-properties must have ".xml" as its file extension).

      Parameters:
      pName - The name of the properties-file.
      Returns:
      A Properties mapping read from the given file.
      Throws:
      NullPointerException - if the pName paramters is null
      IOException - if an error occurs during load.
      FileNotFoundException - if no properties-file could be found.
      See Also:

    • clone

      public static Object clone(Cloneable pObject) throws CloneNotSupportedException
      Throws:
      CloneNotSupportedException

    • main

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

    • isClassAvailable

      public static boolean isClassAvailable(String pClassName)
      Tests if a named class is generally available. If a class is considered available, a call to Class.forName(pClassName) will not result in an exception.
      Parameters:
      pClassName - the class name to test
      Returns:
      true if available

    • isClassAvailable

      public static boolean isClassAvailable(String pClassName, Class pFromClass)
      Tests if a named class is available from another class. If a class is considered available, a call to Class.forName(pClassName, true, pFromClass.getClassLoader()) will not result in an exception.
      Parameters:
      pClassName - the class name to test
      pFromClass - the class to test from
      Returns:
      true if available

    • isFieldAvailable

      public static boolean isFieldAvailable(String pClassName, String pFieldName)

    • isFieldAvailable

      public static boolean isFieldAvailable(String pClassName, String pFieldName, Class pFromClass)

    • isMethodAvailable

      public static boolean isMethodAvailable(String pClassName, String pMethodName)

    • isMethodAvailable

      public static boolean isMethodAvailable(String pClassName, String pMethodName, Class[] pParams)

    • isMethodAvailable

      public static boolean isMethodAvailable(String pClassName, String pMethodName, Class[] pParams, Class pFromClass)