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Hi All
I have a suite of Java classes for working
with well formed XML in memory. The idea is to
enable applets running in browsers access to XML based data. I am currently
passing data to applets in XMLObject form, I am also using these classes for the
middleware layer in fairly large business critical applications.
Why re-invent the wheel? Well the .Jar file is 25k zipped. 30k unzipped. The raw class files run to
about 65k, I have not tried to compress or optimise this yet. Any
exceptions still print debug style messages to assist in fixing any problems.
Compared to the 'full monty' applications from IBM and Microsoft' I reckon thats
good enough reason.
The classes provide the following functionality -
create a new empty XmlObject
create an XmlObject from a string. ( or text file
)
get the value of an attribute
set the value of an attribute
insert an attribute or node
remove an attribute or node
insert a copy of an XmlObject into another
XmlObject
copy the XmlObject or a subsection of the
XmlObject
build a cursor on a list of attributes at a certain
level in the XmlObject
nodes and leaves can be located using qualified
names. (IE: get ("customer.address.postcode") )
Anyway that's the basics, there are a few more
besides. Are there any souls out there interested in testing this lot
before I let it loose on the general community? drop me a mail at ian@imolesworth.demon.co.uk and
I'll mail you the files and some documentation.
Ian Molesworth
Tango4 Consulting
ltd
+44 (0) 411 378 562
+44 (0) 1892 852846
Sample follows -
public static void main(java.lang.String[] args)
{
try
{
// To
build an object from the test file uncomment the following line
and
// comment out the 4 after that
// XmlObject
theObject = XmlObject.createFromFile ("C:\\data\\testdata.xob");
String theString =
"<XmlStringUser><UserId> 12345 </UserId>
<UserName> Ian Molesworth";
theString +=
"</UserName> <ProductList> <Product> <name> Term life
</name> </Product>
<Product>";
theString +=
"<name> dual life </name> </Product> <Product>
<name> mortgage life </name>
</Product>";
theString
+= "<Product> <name> annuity </name> </Product>
</ProductList> </XmlStringUser>";
// Uncomment the next two lines to see the sample
string streamed out
// System.out.println("A string that will
become an XmlObject -
");
// System.out.println(theString);
XmlObject
theObject = XmlObject.buildFromString (theString);
// Uncomment the next two lines to see the
formatted XML Object after being built from the
string
// System.out.println("\nThe serialized & formatted
XmlObject - ");
// System.out.println
(theObject.asXml());
theObject.insert
("Request","VerifyUser");
XmlObject
Address = XmlObject.build ("Address");
Address.insert
("PostCode");
Address.insert
("NameBer","31");
Address.insert ("line4","East
Sussex");
theObject.insert (Address);
theObject.set
("Address.PostCode","TN6 3LW");
// Uncomment the next two lines to see the
formatted XML Object after being having the additional bits
added.
// System.out.println("\nThe NEW serialized & formatted
XmlObject - ");
// System.out.println
(theObject.asXml());
if (
theObject.contains("UserId"))
{
System.out.println
( "UserId = " +
theObject.get("UserId").asXml());
System.out.println (
"User name = " +
theObject.get("UserName").asXml());
if (
theObject.contains("ProductList"))
{
System.out.println ("List of products -
");
int n = 1;
// This bit pulls out a
copy of the subsection ( class ) held under productlist
XmlObject ListOfProducts =
theObject.get("ProductList");
// build a cursor on
the enclosed attributes
XCursor cursor
= new XCursor
(ListOfProducts);
while
(cursor.hasMoreElements())
{
XmlObject
listObject =
(XmlObject)cursor.nextElement();
System.out.println
(n++ + " " + listObject.get("name").asXml());
}
}
else
if (
theObject.contains("Product"))
{
System.out.println
(theObject.get("Product.name").asXml());
}
}
}
catch
( Throwable exception )
{
System.out.println
("Exception........." + exception.getMessage());
}
}
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