Selecting nodes using an XPath expression

Assuming that I have a DOM Document object containing a valid XML file, what is the quickest way to select a subset of nodes from the document using an XPath expression. I would like the results in either a NodeList object or another Document object.
Microsoft has a way to do this using a single method named 'selectNodes'. Why is querying an XML document so hard to do using java? Am I missing something?

In case you're using Xalan take a look at org.apache.xpath.XPathAPI. The function selectNodeList(...) probably does what you want.
Good luck.

Similar Messages

Using the XPATH expression function in Transformation activity

Hi,
I have to map the variable value(other than the source variable) to one of the node in the target variable in the transformation activity. For that I am using the XPATH expression function bpws:getVariableData ('variableName') and map it to corrsponding target node. But this mapping is not at all happening. The same prolem occurs while using function ora:getInstanceID() in transformation function. Then I could find a metalink note id: 387381.1,saying it as the bug in 10.1.2.2 BPEL PM, which they are covering in the next release. But our BPEL PM version is 10.1.3.3. But still the same type of problem occurs.
Please let me know, is there are any solution for using the ora:getInstanceID() , bpws:getVariableData in Transformation activity.

Hi,
I dont understand why would you need to use the "bpws:getVariableData" function.
When you are mapping a source-node to a target-node, it usually assigns the value in the source-node to the target-node, which is as good as using the "bpws:getVariableData" function.
So, technically speaking you need to use this function explicitly to achieve that ...
Also, if you want the instance-id, you can use the "ora:getInstanceId()" directly in the BPEL code than using it in the transformation.
Regards,
Madhu.

Extracting node value from XPath Expression in OSB Conditional Branch

HI All
While using conditional branch in OSB,i only get an XPath Expression editor to set a variable used to test a condition.
Now let's say my request is
<Body>
<exam:PersonSearchReq xmlns:exam="http://www.example.org">
<exam:RequestorSSO>James</exam:RequestorSSO>
</exam:PersonSearchReq>
</Body>
I write my XPath expression as :
./exam:PersonSearchReq/exam:RequestorSSO/text()
Now if I test this using the tester application , insted of getting node value 'James' ,i get the entire node element ,i.e
<exam:RequestorSSO xmlns:exam="http://www.example.org">James</exam:RequestorSSO>
Please suggest how can i extract the text value.
Regards,
Chinmay

Hi Guys
Actually it turns out that you need to populate In-Variable to function is correctly.As soon as i entere 'body' in it,it worked fine.
Thanks
Chinmay

Using a xpath expression stored in a variable

Hi All,
I have an xpath expression which is stored in the database which I need to use against the request XML. I am able to retrieve this Xpath expression from the database, but not able to use it against the request XML.
Xpath expression got from the database is: /request/param//name.
I have tried $body/$XpathVariable, this does not work. I can not hard code this expression during my design time, so the details of the expression has to be fetched at run time.
Any ideas to get the value would helpful.
Thanks

try to assign this value to a temp variable and then in the XqueryExpression try to retrieve it starting with "//"

Retrieve xml attribute value of nth xml node using xpath query

I have an xml with following stucture...
<xml>
<header>
<DocumentReference OrderId="order001">
<DocumentReference OrderId="order002">
<DocumentReference OrderId="order003">
I have to loop through this xml and retrieve the orderId values inside Biztalk orchestration.
In the expression shape, I get the count of 'DocumentReference' nodes using an xpath query and then
Added a loopshape to make sure it loops thru all nodes
Loop condition: n<=nodeCount (where n is an integer variable, n=0 to begin with, incremented by 1 thru each loop, nodeCount is # of DocumentReference nodes)
I try retrieve to the orderId in the following expression shape using the below xpath query
xpathQuery = System.String.Format("//*[local-name()='OrderReference'][{0}]/@orderID)",n);
sOrderId = xpath(MsgSingleInvoice,xpathQuery);
And I get the following exception:
Inner exception: '//*[local-name()='OrderReference'][1]/@orderID)' has an invalid token.
Exception type: XPathException
Appreciate any help! thanks!

Thanks for the quick response. I got rid of it.
And I see a different error:
Inner exception: Specified cast is not valid. Exception type: InvalidCastException
Source: Microsoft.XLANGs.Engine
Target Site: System.Object XPathLoad(Microsoft.XLANGs.Core.Part, System.String, System.Type)
Since variable 'n' is of integer type, I suspected it and changed it to n.ToString() and tested again and still see the same error.

Help Page Error: Using XPath expressions as list indexes and map keys

The help page says for maps to use the XPath expression
/process_data/mapvar[@id='/process_data/@stringvar']
But in reality for things to work you have to omit the quotations.

thanks a lot for your help..
there are total 162 records in the v$open_cursor for that user.
among that the open cursor is only 4 and open-recursive cursor is only 6 for that user.
in my session i am executing only the renaming of the constraints and nothing more.
When i have queried the v$open_cursor for cursor_type='OPEN' for all the users, then i got that it has exceeded the value of open_cursors parameter.
So how can i resolve that....

In XSLT, make XPath expression to retrieve attribute nodes

I have a problem fetching attribute nodes in an Xpath expression.
SOAP Request:
<Create ID=5/>
<Name>Per</Name>
I want to fetch the value of ID and put it into another variable with an XPath expression in a XSLT transformation.
If you look at http://www.w3schools.com/xpath/xpath_syntax.asp
You should be able to do this with "//Create[@ID]" according to the examples, but this is not working at all in JDev.
Any thoughts?
/Per

Thanks, that worked!
Just thought about it. How do you do the other way around.
<Create>
<ID>7</ID>
to
<Create ID=7>
.

XPATH-expressions and namespaces

I have a xml-file for testing my xpath expression, like this:
<a>
 
 <c>aaa</c>
 <d>
 <e>111</e>
 </d>
 
 
 <c>bbb</c>
 <d>
 <e>222</e>
 </d>
 
 
 <c>ccc</c>
 <d>
 <e>333</e>
 </d>
 What I want is to get the value of element 'e', based on a check on what the value of element 'c' is. I alway know the value of element 'c'.
I solve this by using this xpath-expression in my xsl-file:
<xsl:variable name="xpathTest" select="//e[../preceding-sibling::c = 'bbb']" />This expression should return '222', and it works!!!
But, when I use the another xml-file with a similar structure, with namespaces, like this:
<body xsi:type="fkpsoap:FKPSOAPOperationResponse">
 <FKPSOAPOperationResponse>
 <fkpsoap_1:fkrdk178_output_data>
 <fkpsoap_1:fkrdk178_list_cust_information>
 <fkpsoap_1:fkrdk178_list_customerinfo>
 <fkpsoap_1:fkrdk178_list_variable_code> aaa </fkpsoap_1:fkrdk178_list_variable_code>
 <fkpsoap_1:fkrdk178_list_value_name>
 <fkpsoap_1:fkrdk178_list_value_text> 111 </fkpsoap_1:fkrdk178_list_value_text>
 </fkpsoap_1:fkrdk178_list_customerinfo>
 <fkpsoap_1:fkrdk178_list_customerinfo>
 <fkpsoap_1:fkrdk178_list_variable_code> bbb </fkpsoap_1:fkrdk178_list_variable_code>
 <fkpsoap_1:fkrdk178_list_value_name>
 <fkpsoap_1:fkrdk178_list_value_text> 222 </fkpsoap_1:fkrdk178_list_value_text>
 </fkpsoap_1:fkrdk178_list_customerinfo>
 <fkpsoap_1:fkrdk178_list_customerinfo>
 <fkpsoap_1:fkrdk178_list_variable_code> ccc </fkpsoap_1:fkrdk178_list_variable_code>
 <fkpsoap_1:fkrdk178_list_value_name>
 <fkpsoap_1:fkrdk178_list_value_text> 333 </fkpsoap_1:fkrdk178_list_value_text>
 </fkpsoap_1:fkrdk178_list_customerinfo>
 </fkpsoap_1:fkrdk178_list_cust_information>
 </fkpsoap_1:fkrdk178_output_data>
 </FKPSOAPOperationResponse>
</body>Then the xpath-expression does not work!
I can easily extract the value of the element similar to the element 'e' in my test-file, but then I will always get the value from the first occurance of 'e', which is '111'.
Can anyone help me with this?

Most APIs which let you create XPath objects allow you to create a namespace context and attach it to the XPath object. Your API most likely does too, whatever it is. Then you would just use the prefixes which the namespace context describes in your XPath expression.
(This namespace context generally maps prefixes to namespace URIs. Remember that the namespace URI is really what the XPath is looking for and the prefix is just a short cut for you to use.)

NullPointerException when processing *[*] xpath expression

I'm trying to pull only elements that have an element as a
child, using the *[*] xpath expression. When I use MSXML 3.0,
my results are correct. When I use ORAXSL (NT 9i version
downloaded from OTN), I get a NullPointerException. Please see
example below.
<?xml version="1.0"?>
<TABLES>
 <TABLE1>
 <TABLE1_ROW1>TEXT1</TABLE1_ROW1>
 <TABLE1_ROW2>TEXT2</TABLE1_ROW2>
 </TABLE1>
 <TABLE2>
 <TABLE2_ROW1>TEXT3</TABLE2_ROW1>
 </TABLE2>
 <TABLE3>
 <TABLE3_ROW1>TEXT4</TABLE3_ROW1>
 </TABLE3>
</TABLES>
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="text" version="1.0" encoding="UTF-8"
indent="yes"/>
<xsl:key name="elements" match="*[*]" use="name()"/>
<xsl:template match="/">
<xsl:for-each select="//*[generate-id(.)=generate-id(key
('elements',name())[1])]">
<xsl:for-each select="key('elements',name())">
<xsl:if test="position()=1">
<xsl:text>drop table </xsl:text>
<xsl:value-of select="name()"/>
<xsl:text>;
</xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:for-each>
<xsl:text>
exit</xsl:text>
</xsl:template>
</xsl:stylesheet>
MSXML 3.0 OUTPUT:
drop table TABLES;
drop table TABLE1;
drop table TABLE2;
drop table TABLE3;
exit
ORAXSL OUTPUT:
java.lang.NullPointerException
Error occurred while processing test.xml: null
If I change the *[*] to just * then the XSLT will process.

This is a bug. I've filed Bug 2138361 to get this looked into by
development.
The workaround is to avoid using keys, moving the *[*] into the
outer select expression for the for-each:
<xsl:for-each select="//*[*]">
instead of:
<xsl:for-each select="//*[*][generate-id(.) =
 generate-id(key('elements',name())
[1])]">

UCCX XPath-expression with -operator does not work

Hi all,
I'd like to read opening hours from an XML file. The UCCX version is 8.5.
The XML looks like this:
<ccdata>
 <dow>
 <dow6>
 <open>
 <from hour="8" minute = "00" />
 <until hour="19" minute ="15" />
 </open>
 </dow6>
</dow>
</ccdata>
I simpified the file for testing, it should contain several open items later for every day of week.
I want to use an XPath expression to check if there's a open item for the current day of week and time.
I started with a simplified expression that should return the node for an hour value of 8:
//ccdata/dow/dow6/open/from[@hour=8 ]/@hour
that's working- it returns "8".
But if I change the expression to return the node for an hour value less then 9:
//ccdata/dow/dow6/open/from[@hour<9]/@hour
it returns nothing. If I enter the expression into a XPath test tool ("XPath Visualizer Tool") it looks ok.
Any ideas? Is that a bug?
Thanks in advance
Jörg

It must be a bug- I tried it on UCCX 7.0(1)SR03 and it's working there.

Xpath expression in Left and Right operand for Receiver determination

Hi Experts,
Is it possible to use an Xpath expression in both the Left and Right operand inside the Receiver determination e.g.
(/Message/line/IDNumber = /Message/line/IDNo)
Any help will be appreciated.
Thank you,
Brendon

in standard receiver determination you can only specify value for the right operand.
that is one of the reasons you go for enhanced receiver determination
as mentioned in the sap help
If you are using the condition editor to define receiver determinations or interface determinations, you can only use the expression editor to create an expression for the left operand. You must specify a value for the right operand.

Setting custom color for selected node in JTree?

Hi,
i want to set my own color for selected node in JTree. i don't want to set for all the nodes...how to set Color for Selected node using TreeCellRender class?
Thanks
Mani

I assume you are not setting a custom tree cell renderer...
javax.swing.JTree theTree = ...;
java.awt.Color newBGColor = ...;
((javax.swing.tree.DefaultTreeCellRenderer)theTree.getCellRenderer())
.setBackgroundSelectionColor(newColor);

Can not construct xml from relative xpath expression: //FormVar

In version 7.0, it was possible to access Form Variables with the (valid) XPath Expression "//FormVariable".
In 7.2.2, using this XPath Expression leads to a stalled action, with message: "can not construct xml from relative xpath expression: //FormVar". (see full stack trace below)
What's wrong? How can I fix this?
Use of relative expression is very very useful during the development phase!
Best Regards,
com.adobe.workflow.WorkflowRuntimeException: can not construct xml from relative xpath expression: //FormVar
at com.adobe.workflow.pat.service.PATExecutionContextImpl.createNodesForXPathExpression(PATE xecutionContextImpl.java:854)
at com.adobe.workflow.pat.service.PATExecutionContextImpl.setProcessDataValue(PATExecutionCo ntextImpl.java:707)
at com.adobe.workflow.pat.service.PATExecutionContextImpl.setProcessDataWithExpression(PATEx ecutionContextImpl.java:429)
at com.adobe.workflow.qpac.set_value.SetValueService.execute(SetValueService.java:72)
at com.adobe.workflow.engine.PEUtil.executeAction(PEUtil.java:184)
at com.adobe.workflow.engine.ProcessEngineBMTBean.continueBranchAtAction(ProcessEngineBMTBea n.java:2371)
at com.adobe.workflow.engine.ProcessEngineBMTBean.asyncInvokeProcessCommand(ProcessEngineBMT Bean.java:512)
at sun.reflect.GeneratedMethodAccessor709.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:683)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:185)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.AbstractTxInterceptorBMT.invokeNext(AbstractTxInterceptorBMT.java:1 44)
at org.jboss.ejb.plugins.TxInterceptorBMT.invoke(TxInterceptorBMT.java:62)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:72)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:120)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:122)
at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:331 )
at org.jboss.ejb.Container.invoke(Container.java:723)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:359)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:83)
at $Proxy285.asyncInvokeProcessCommand(Unknown Source)
at com.adobe.workflow.engine.ProcessCommandControllerBean.onMessage(ProcessCommandController Bean.java:127)
at sun.reflect.GeneratedMethodAccessor641.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.MessageDrivenContainer$ContainerInterceptor.invoke(MessageDrivenContainer.j ava:458)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:185)
at org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor.invoke(MessageDrivenInstanceInterc eptor.java:62)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:315)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:148)
at org.jboss.ejb.plugins.RunAsSecurityInterceptor.invoke(RunAsSecurityInterceptor.java:90)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.MessageDrivenContainer.internalInvoke(MessageDrivenContainer.java:372)
at org.jboss.ejb.Container.invoke(Container.java:723)
at org.jboss.ejb.plugins.jms.JMSCont

Sorry, i just read my own message in the discussion forum and
discovered all spaces for formating the XML tags where gone.
It should look like this:
[-----xml_type---]
<doc>
__<role>
____actor
____<first>
______john
____</first>
____<last>
______bond
____</last>
__</role>
__<role>
____actor
____<first>
______james
______</first>
____<last>
______smith
____</last>
__</role>
</doc>
semantic:
There are two actors: "john bond" and "james smith"
Querying for "john bond" succeedes which is correct
Querying for "james smith" succeedes which is correct
Querying for "james bond" fails which is correct
Querying for "john smith" succeedes which is an ERROR!
contains(xdata, 'actor INPATH(//role[./first = "john" and ./last
= "smith"])' (= 100 ---> ERROR!)
bye,
feri

Selecting attribute values with XPath?

Dear all,
Is it possible to retrieve the value of a certain attribute in an XML document using an XPath expression? For instance, if I have the following doc:
<someTag>
<anotherTag attr="123" />
</someTag>Is there one XPath expression that will return the value of the attribute attr of the element anotherTag, i.e. "123"?
Cheers,
N.

I think /anotherTag/@attr/text() does the job.

JAVA XML DOM4J: Invalid XPath expression

Hi everybody,
I am not sure why I am getting an exception for this expression:
Number count= document.numberValueOf("/NODE/SUBNODE/count(*)");
Exception is:
org.dom4j.InvalidXPathException: Invalid XPath expression:
Thanks regards
Mario

Hello
what about
"count (/NODE/SUBNODE)" as xpath expression
regards franz
reward points if useful

Selecting nodes using an XPath expression

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