Class NodeUtil

java.lang.Object
uk.ac.starlink.datanode.nodes.NodeUtil

public class NodeUtil extends Object
Miscellaneous utilities.
  • Constructor Summary

    Constructors
    Constructor
    Description
     
  • Method Summary

    Modifier and Type
    Method
    Description
    static String
    Returns the full path of a node, if possible.
    static boolean
    Indicates whether the JNIAST package is present.
    static boolean
    Indicates whether applications within this JVM should be considered to be running within a graphical context or not.
    static boolean
    Indicates whether the JNIHDS package is present.
    static boolean
    Indicates whether the Java Advanced Imaging classes are available.
    static boolean
    Indicates whether the nom.tam.fits FITS I/O library is available.
    static boolean
    isASCII(byte[] buf)
    Indicates whether the bytes in a given buffer look like ASCII text or not.
    static void
    setGUI(boolean hasGUI)
    Sets whether applications running within this JVM should be considered to be running within a GUI or not.
    static String
    Returns a short string representation of a DataNode.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • NodeUtil

      public NodeUtil()
  • Method Details

    • isASCII

      public static boolean isASCII(byte[] buf)
      Indicates whether the bytes in a given buffer look like ASCII text or not. This is just a guess based on what characters are in there.
      Parameters:
      buf - the buffer to test
      Returns:
      true iff buf looks like ASCII
    • hasHDS

      public static boolean hasHDS()
      Indicates whether the JNIHDS package is present. It might not be if the native libraries for this platform have not been installed.
      Returns:
      true iff JNIDHS is availble
    • hasAST

      public static boolean hasAST()
      Indicates whether the JNIAST package is present. It might not be if the native libraries for this platform have not been installed.
      Returns:
      true iff JNIAST is available
    • hasJAI

      public static boolean hasJAI()
      Indicates whether the Java Advanced Imaging classes are available. These are an extension to the J2SE1.4, so may not be present if they have not been installed.
      Returns:
      true iff JAI is available
    • hasTAMFITS

      public static boolean hasTAMFITS()
      Indicates whether the nom.tam.fits FITS I/O library is available.
      Returns:
      true iff nom.tam.fits is available
    • hasGUI

      public static boolean hasGUI()
      Indicates whether applications within this JVM should be considered to be running within a graphical context or not.
      Returns:
      true iff this JVM appears to be using graphical components
    • setGUI

      public static void setGUI(boolean hasGUI)
      Sets whether applications running within this JVM should be considered to be running within a GUI or not.
      Parameters:
      hasGUI - true iff this JVM ought to be using graphical components
    • getNodePath

      public static String getNodePath(DataNode node)
      Returns the full path of a node, if possible. The idea is to give a human-readable string indictating what you're looking at, describing position within filesystem, tar archive, XML document, whatever.
      Parameters:
      node - node to trace
      Returns:
      node path, or null
    • toString

      public static String toString(DataNode node)
      Returns a short string representation of a DataNode. This is suitable for use as the string used in rendering the node in the tree.
      Returns:
      a string summarising the node