How to use

getTopLevelClasses

method

in

org.kitesdk.morphline.api.MorphlineContext

public void importCommandBuilders(Collection<String> importSpecs) {
 if (commandBuilders == Collections.EMPTY_MAP) { // intentionally effective no more than once
  commandBuilders = Maps.newHashMap();
  if (LOG.isDebugEnabled()) {
   LOG.debug("Importing commands from Java classpath: {}", System.getProperty("java.class.path"));
  } else {
   LOG.info("Importing commands");
  }
  Collection<Class<CommandBuilder>> builderClasses = getTopLevelClasses(importSpecs, CommandBuilder.class);
  for (Class<CommandBuilder> builderClass : builderClasses) {
   try {
    CommandBuilder builder = builderClass.newInstance();
    for (String builderName : builder.getNames()) {
     LOG.debug("Importing command: {} from class: {}", builderName, builderClass.getName());
     if (builderName.contains(".")) {
      LOG.warn("Command name should not contain a period character: " + builderName);
     }
     commandBuilders.put(builderName, builderClass);
    }
   } catch (Exception e) {
    throw new MorphlineRuntimeException(e);
   }
  }
  LOG.info("Done importing commands");
 }
}

public void importCommandBuilders(Collection<String> importSpecs) {
 if (commandBuilders == Collections.EMPTY_MAP) { // intentionally effective no more than once
  commandBuilders = Maps.newHashMap();
  if (LOG.isDebugEnabled()) {
   LOG.debug("Importing commands from Java classpath: {}", System.getProperty("java.class.path"));
  } else {
   LOG.info("Importing commands");
  }
  Collection<Class<CommandBuilder>> builderClasses = getTopLevelClasses(importSpecs, CommandBuilder.class);
  for (Class<CommandBuilder> builderClass : builderClasses) {
   try {
    CommandBuilder builder = builderClass.newInstance();
    for (String builderName : builder.getNames()) {
     LOG.debug("Importing command: {} from class: {}", builderName, builderClass.getName());
     if (builderName.contains(".")) {
      LOG.warn("Command name should not contain a period character: " + builderName);
     }
     commandBuilders.put(builderName, builderClass);
    }
   } catch (Exception e) {
    throw new MorphlineRuntimeException(e);
   }
  }
  LOG.info("Done importing commands");
 }
}

@Test
@Ignore
public void testHugeImportSpecs() {
 long start = System.currentTimeMillis();
 List<String> importSpecs = Arrays.asList("com.**", "org.**", "net.*", getClass().getName());
 for (Class clazz : new MorphlineContext().getTopLevelClasses(importSpecs, CommandBuilder.class)) {
  System.out.println("found " + clazz);
 }
 float secs = (System.currentTimeMillis() - start) / 1000.0f;
 System.out.println("secs=" + secs);
}

@Test
public void testImportSpecs() {
 List<String> importSpecs = Arrays.asList("org.kitesdk.**", "org.apache.solr.**", "net.*", getClass().getName());
 for (Class clazz : new MorphlineContext().getTopLevelClasses(importSpecs, CommandBuilder.class)) {
  //System.out.println("found " + clazz);
 }
 MorphlineContext ctx = new MorphlineContext.Builder().build(); 
 ctx.importCommandBuilders(importSpecs);
 ctx.importCommandBuilders(importSpecs);    
}

@Test
public void testImportSpecsWithOnlyFQCNs() {
 List<String> importSpecs = Arrays.asList(getClass().getName());
 for (Class clazz : new MorphlineContext().getTopLevelClasses(importSpecs, CommandBuilder.class)) {
  //System.out.println("found " + clazz);
 }
 MorphlineContext ctx = new MorphlineContext.Builder().build(); 
 ctx.importCommandBuilders(importSpecs);
 ctx.importCommandBuilders(importSpecs);    
}