Why am i getting this error java.lang.ClassNotFoundException? - lucene

Question

Why am i getting this error message?
Testcase: createIndexBatch_usingTheTestArchive(src.LireHandlerTest): Caused an ERROR
at/lux/imageanalysis/ColorLayoutImpl
java.lang.NoClassDefFoundError: at/lux/imageanalysis/ColorLayoutImpl
at net.semanticmetadata.lire.impl.SimpleDocumentBuilder.createDocument(Unknown Source)
at net.semanticmetadata.lire.AbstractDocumentBuilder.createDocument(Unknown Source)
at backend.storage.LireHandler.createIndexBatch(LireHandler.java:49)
at backend.storage.LireHandler.createIndexBatch(LireHandler.java:57)
at src.LireHandlerTest.createIndexBatch_usingTheTestArchive(LireHandlerTest.java:56)
Caused by: java.lang.ClassNotFoundException: at.lux.imageanalysis.ColorLayoutImpl
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
I am trying to create a Lucene index using documents that are created using Lire. When i am getting to the point where it tries to create a document using the document builder it gives me this error message.
input paramaters first run:
filepath: "test_archive" (this is a image archive)
whereToStoreIndex: "test_index" (Where i am going to store the index)
createNewIndex: true
Since the method is recursive (see the if statement where it checks if is a directory) it will call itself multiple times but all the recursive calls uses createNewIndex = false.
Here is the code:
public static boolean createIndexBatch(String filepath, String whereToStoreIndex, boolean createNewIndex){
DocumentBuilder docBldr = DocumentBuilderFactory.getDefaultDocumentBuilder();
try{
IndexWriter indexWriter = new IndexWriter(
FSDirectory.open(new File(whereToStoreIndex)),
new SimpleAnalyzer(),
createNewIndex,
IndexWriter.MaxFieldLength.UNLIMITED
);
File[] files = FileHandler.getFilesFromDirectory(filepath);
for(File f:files){
if(f.isFile()){
//Hopper over Thumbs.db filene...
if(!f.getName().equals("Thumbs.db")){
//Creating the document that is going to be stored in the index
String name = f.getName();
String path = f.getPath();
FileInputStream stream = new FileInputStream(f);
Document doc = docBldr.createDocument(stream, f.getName());
//Add document to the index
indexWriter.addDocument(doc);
}
}else if(f.isDirectory()){
indexWriter.optimize();
indexWriter.close();
LireHandler.createIndexBatch(f.getPath(), whereToStoreIndex, false);
}
}
indexWriter.close();
}catch(IOException e){
System.out.print("IOException in createIndexBatch:\n"+e.getMessage()+"\n");
return false;
}
return true;
}

Answer 1

It sounds like you are missing a java library.
I think you need to download Caliph & Emir, that may be used indirectly by Lire.
http://www.semanticmetadata.net/download/