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To: axis-user@ws.apache.org
Subject: Re: [Axis2] Help using AXIOMXPath
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From: Brian Bacsu <bbacsu@csc.com>
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Hi

I am trying to use AXIOMXPath in a statement such as this (using Axis2 
version 1.0):

AXIOMXPath xpathExpression = new AXIOMXPath (xpathString); 
OMElement node= (OMElement)xpathExpression.selectSingleNode(OM_message); 

I have verified the XPath is valid.

But... I get the following error:

java.lang.NullPointerException
        at org.apache.axiom.om.xpath.DocumentNavigator.getDocumentNode(
DocumentNavigator.java:603)
        at org.jaxen.expr.DefaultAbsoluteLocationPath.evaluate(
DefaultAbsoluteLocationPath.java:97)
        at org.jaxen.expr.DefaultXPathExpr.asList(DefaultXPathExpr.java:98
)
        at org.jaxen.BaseXPath.selectNodesForContext(BaseXPath.java:674)
        at org.jaxen.BaseXPath.selectNodes(BaseXPath.java:213)
        at org.jaxen.BaseXPath.selectSingleNode(BaseXPath.java:234)

Any suggestions would be appreciated.

Thanks,

Brian Bacsu

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<br><font size=2 face="sans-serif">Hi</font>
<br>
<br><font size=2 face="sans-serif">I am trying to use AXIOMXPath in a statement
such as this (using Axis2 version 1.0):</font>
<br>
<br><font size=2 face="sans-serif">AXIOMXPath xpathExpression = new AXIOMXPath
(xpathString); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </font>
<br><font size=2 face="sans-serif">OMElement node= (OMElement)xpathExpression.selectSingleNode(OM_message);
</font>
<br>
<br><font size=2 face="sans-serif">I have verified the XPath is valid.</font>
<br>
<br><font size=2 face="sans-serif">But... I get the following error:</font>
<br>
<br><font size=1 color=#000080 face="Courier New"><u>java.lang.NullPointerException</u></font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.apache.axiom.om.xpath.DocumentNavigator.getDocumentNode(</font><font size=1 color=#000080 face="Courier New"><u>DocumentNavigator.java:603</u></font><font size=1 face="Courier New">)</font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.jaxen.expr.DefaultAbsoluteLocationPath.evaluate(</font><font size=1 color=#000080 face="Courier New"><u>DefaultAbsoluteLocationPath.java:97</u></font><font size=1 face="Courier New">)</font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.jaxen.expr.DefaultXPathExpr.asList(</font><font size=1 color=#000080 face="Courier New"><u>DefaultXPathExpr.java:98</u></font><font size=1 face="Courier New">)</font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.jaxen.BaseXPath.selectNodesForContext(</font><font size=1 color=#000080 face="Courier New"><u>BaseXPath.java:674</u></font><font size=1 face="Courier New">)</font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.jaxen.BaseXPath.selectNodes(</font><font size=1 color=#000080 face="Courier New"><u>BaseXPath.java:213</u></font><font size=1 face="Courier New">)</font>
<br><font size=1 face="Courier New">&nbsp; &nbsp; &nbsp; &nbsp; at
org.jaxen.BaseXPath.selectSingleNode(</font><font size=1 color=#000080 face="Courier New"><u>BaseXPath.java:234</u></font><font size=1 face="Courier New">)</font>
<br>
<br><font size=2 face="sans-serif">Any suggestions would be appreciated.</font>
<br>
<br><font size=2 face="sans-serif">Thanks,<br>
<br>
Brian Bacsu<br>
</font>
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