The function below iterates over a stream but for certain input it's throwing a NullPointerException:
public List<DesignTimeLibrary> getDTLData(List<Project> projects, String projLibLocation, String estimatePath) {
List<DesignTimeLibrary> allDTLs = new ArrayList<DesignTimeLibrary>();
FileProcessor fileProc = new FileProcessor();
XPathProcessor xProc = new XPathProcessor();
projects.stream()
.filter(pJ-> pJ.getDtlNames().size()>0)
.flatMap(project -> project.getDtlNames().stream()).filter(Objects::nonNull)
.forEach(dTL -> {
if(containsName(allDTLs, dTL)) return;
Logger.info("***** Processing DTL "+dTL+" *****");
Map<String, Process> dtlProcesses = null;
List<SharedResource> dtlResources = null;
List<Schema> dtlSchemas=null;
List<Adapter> dtlAdapters = null;
try {
Path pP = fileProc.extractProjLib(projLibLocation + File.separator + dTL, projLibLocation + File.separator + "extracted");
DesignTimeLibrary dtl = new DesignTimeLibrary(dTL, pP);
...
allDTLs.add(dtl);
}
catch (Exception e) {
e.printStackTrace();
}
});
return allDTLs;
}
The output is:
Processing: WCLEClientV002.projlib
Processing: WCLEClientV002.projlib
java.lang.NullPointerException
at com.tbt.data.ProjectProcessor.lambda$getDTLData$1(ProjectProcessor.java:77)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at com.tbt.data.ProjectProcessor.getDTLData(ProjectProcessor.java:79)
Here the .forEach(dTL -> {
is line 79.
I've tried debugging but couldn't locate the null object.
The NullPointerException
is at line 77, which is here pJ-> pJ.getDtlNames().size()>0
. If the getDtlNames()
returns null then NullPointerException
is thrown, so just add an null check to that filter
.filter(pJ-> Objects.nonNull(pJ.getDtlNames()) && pJ.getDtlNames().size()>0)