edu.UCL.utils
Class Utilities

java.lang.Object
  |
  +--edu.UCL.utils.Utilities

public class Utilities

extends java.lang.Object

This class provides some useful static methods, used in the implementation of XMIDDLE.

Constructor Summary

Utilities()

Method Summary

static byte[]	addArrays(byte[] one, byte[] two) Adds two arrays of bytes.
static org.w3c.dom.Document	createNewDocument() Creates a new DOM Document
static java.lang.String	generateXPath(org.w3c.dom.Node n) Generates an XPath expression from the root of a tree down to the node passed as a parameter.
static java.lang.String	printNode(org.w3c.dom.Node node) Prints the given node.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Utilities

public Utilities()

Method Detail

createNewDocument

public static org.w3c.dom.Document createNewDocument()

Creates a new DOM Document

Returns:

An empty DOM Document

generateXPath

public static java.lang.String generateXPath(org.w3c.dom.Node n)

Generates an XPath expression from the root of a tree down to the node passed as a parameter. This method does not produce the prettiest XPath expression ever: Every level in the expression has an index next to it, even if it's not necessary. This should not have a performance impact on the XPath parser so there's no point cleaning it up here.

Parameters:

n - the node to be located with the XPath expression

Returns:

an XPath expression pointing to n

printNode

public static java.lang.String printNode(org.w3c.dom.Node node)

Prints the given node.

Returns:

A String object that contains the XML code corrisponding to the DOM node

addArrays

public static byte[] addArrays(byte[] one,
                               byte[] two)

Adds two arrays of bytes.

Parameters:

one - An array of bytes

two - An array of bytes

Returns:

An array of bytes obtained by the concatenation of the two arguments