Search for a specific ID

[Jeppe Sommer]

I have a XML document, where I want to make a look-up on a specific ID text ( see below - the infoID). How is the best way to find an element text in a big xml document. Lets say I want to find the infoID "ID-2"?

Should I just run through the entire XML document from the beginning and make a test, if the text is equal the ID I want to find or is there a better way?

// Run through every element
String infoID = e.getText();
if ( infoID.equals("ID-2") )
break;

<infoBlock>
<infoID>ID-1</infoID>
<infoSubject>My subject 1</infoSubject>
<infoText>My long text 1...</infoText>
</infoBlock>
<infoBlock>
<infoID>ID-2</infoID>
<infoSubject>My subject 2</infoSubject>
<infoText>My long text 2...</infoText>
</infoBlock>
[ January 17, 2006: Message edited by: Jeppe Fjord ]

[Rajagopal Manohar]

using XPath is a clean and flexible alternative

[Jeppe Sommer]

Thank you.

I have been seaching around the web to find a simple example.

In my schema I have been given the infoID element an xpath field name. I have a certain unique infoID and want to find that infoID in the XML document. Then I want to parse the related nodes for that infoID, i.e. infoSubject, infoText.

//XSD for helpInfo
...
<xs:complexType>
<xs:sequence>
<xs:element name="infoBlock" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="infoID" type="infoID"/>
<xs:element name="infoRef" type="infoRef"/>
<xs:element name="infoSubject" type="infoSubject"/>
<xs:element name="infoText" type="infoText"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
...

<xs:unique name="infoID">
<xs:selector xpath=".//infoBlock"/>
<xs:field xpath="infoBlock"/>
</xs:unique>

Du you have any examples?