Class NodeUtil


  • public class NodeUtil
    extends java.lang.Object
    Miscellaneous utilities.
    • Constructor Summary

      Constructors 
      Constructor Description
      NodeUtil()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String getNodePath​(DataNode node)
      Returns the full path of a node, if possible.
      static boolean hasAST()
      Indicates whether the JNIAST package is present.
      static boolean hasGUI()
      Indicates whether applications within this JVM should be considered to be running within a graphical context or not.
      static boolean hasHDS()
      Indicates whether the JNIHDS package is present.
      static boolean hasJAI()
      Indicates whether the Java Advanced Imaging classes are 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 java.lang.String toString​(DataNode node)
      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 Detail

      • NodeUtil

        public NodeUtil()
    • Method Detail

      • 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
      • 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 java.lang.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 java.lang.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