Hauke Haastert created FOP-2362:
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Summary: Rendering AFP extension to intermediate format throws
NullPointerException
Key: FOP-2362
URL: https://issues.apache.org/jira/browse/FOP-2362
Project: Fop
Issue Type: Bug
Components: general
Affects Versions: 1.1
Environment: Apple OSX 10.9.2 / Java version 1.7.0_11
Reporter: Hauke Haastert
When rendering an XSL-FO file that contains an AFP-Extension to the
intermediate format while using Saxon as XSLT transformer, a
NullPointerException is thrown.
Steps to reproduce:
1. Download and unpack the FOP 1.1 binary release.
2. Change into the root directory "fop-1.1" of the release
3. Download Saxon HE from
http://repo1.maven.org/maven2/net/sf/saxon/Saxon-HE/9.4/Saxon-HE-9.4.jar and
copy the file to the lib directory of the FOP 1.1 release
4. Edit the file fop that is located in the root directory of the release and
add the following JVM parameter to the java_exec_args:
-Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl
The line should now look like:
java_exec_args="-Djava.awt.headless=true
-Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl"
5. Download the attached files test.fo and simple.xsl and run the following fop
command:
fop -fo test.fo -out application/X-fop-intermediate-format test.if.xml
Actual Results:
Application throws NullPointerException:
java.lang.NullPointerException
at
net.sf.saxon.event.ReceivingContentHandler.getNodeName(ReceivingContentHandler.java:391)
at
net.sf.saxon.event.ReceivingContentHandler.startElement(ReceivingContentHandler.java:316)
at
org.apache.fop.util.DelegatingContentHandler.startElement(DelegatingContentHandler.java:185)
at
org.apache.fop.render.afp.extensions.AFPPageSetup.toSAX(AFPPageSetup.java:125)
at
org.apache.fop.render.intermediate.IFSerializer.handleExtensionObject(IFSerializer.java:680)
Expected Results:
Application should render IF from FO
Additional Information:
In the toSAX method of the class
org.apache.fop.render.afp.extensions.AFPPageSetup the method addAttribute of
the class org.xml.sax.helpers.AttributesImpl is called with null as first
argument. Due to the APIDOC of the class org.xml.sax.helpers.AttributesImpl the
first argument must either be the namespace or an empty string, but not null:
uri - The Namespace URI, or the empty string if none is available or
Namespace processing is not being performed.
When changing the parameter value to an empty string, no NullPointerException
is thrown anymore. The same problem exists in other classes in the package
org.apache.fop.render.afp.extensions, so I added a diff file for the complete
package (extensions.diff).
The exception is not thrown when using Xalan as XSL transformer.
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