private void initProcessorIterator(Context context, Iterable<? extends Processor> processors) {
Log log = Log.instance(context);
Iterator<? extends Processor> processorIterator;
if (options.isSet(XPRINT)) {
try {
Processor processor = PrintingProcessor.class.newInstance();
processorIterator = List.of(processor).iterator();
} catch (Throwable t) {
AssertionError assertError = new AssertionError("Problem instantiating PrintingProcessor.");
assertError.initCause(t);
throw assertError;
}
} else if (processors != null) {
processorIterator = processors.iterator();
} else {
String processorNames = options.get(PROCESSOR);
JavaFileManager fileManager = context.get(JavaFileManager.class);
try {
// If processorpath is not explicitly set, use the classpath.
processorClassLoader =
fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
? fileManager.getClassLoader(ANNOTATION_PROCESSOR_PATH)
: fileManager.getClassLoader(CLASS_PATH);
/*
* If the "-processor" option is used, search the appropriate
* path for the named class. Otherwise, use a service
* provider mechanism to create the processor iterator.
*/
if (processorNames != null) {
processorIterator = new NameProcessIterator(processorNames, processorClassLoader, log);
} else {
processorIterator = new ServiceIterator(processorClassLoader, log);
}
} catch (SecurityException e) {
/*
* A security exception will occur if we can't create a classloader.
* Ignore the exception if, with hindsight, we didn't need it anyway
* (i.e. no processor was specified either explicitly, or implicitly,
* in service configuration file.) Otherwise, we cannot continue.
*/
processorIterator = handleServiceLoaderUnavailability("proc.cant.create.loader", e);
}
}
discoveredProcs = new DiscoveredProcessors(processorIterator);
}
/**
* Create a PropertyColumn from a property name, column name, row and column classes, and column
* width. The render and editor default to null, and updateRow, updateSubsequentRows, and
* updateTable all default to false.
*
* <p>This generates an editable column if a setter exists for this property, and a non-editable
* property if the setter doesn't exist. For more complex behavior, override {@code
* isEditable(_RowType)}
*
* @param pPropertyName The name of the property of instances of the specified row class
* @param pColumnName The name of the column
* @param pRowClass The class of the table row instances
* @param pValueClass The class of the values of this column
* @param pPrefWidth the preferred width of this column
* @throws AssertionError if pRowClass doesn't have a getter for this property name.
*/
public PropertyColumn(
String pPropertyName,
String pColumnName,
Class pRowClass,
Class pValueClass,
int pPrefWidth) {
super(pColumnName, getWrapper(pValueClass), pPrefWidth);
try {
mGetterMethod = generateGetter(pPropertyName, pRowClass, this);
} catch (NoSuchMethodException e) {
AssertionError err = new AssertionError(e.getMessage());
err.initCause(e);
throw err;
}
Method setter = null;
try {
setter = generateSetter(pPropertyName, pRowClass, this);
setEditable(true);
} catch (NoSuchMethodException nsme) {
setEditable(false);
}
mSetterMethod = setter;
}
/** line search */
private void backtrackingLineSearch() throws AssertionError {
double origDirDeriv = dirDeriv();
// if a non-descent direction is chosen, the line search will break anyway, so throw here
// The most likely reason for this is a bug in your function's gradient computation
try {
assert origDirDeriv < 0;
} catch (AssertionError ae) {
ae.printStackTrace();
stderr.println("!! L-BFGS chose a non-descent direction: check your gradient!");
// System.exit(1);
throw new AssertionError(ae.toString());
}
double alpha = 1.0;
double backoff = 0.5;
if (iter == 1) {
double normDir = Math.sqrt(ArrayUtils.dot(dir, dir));
alpha = (1 / normDir);
backoff = 0.1;
if (DEBUG || verbose) {
stderr.println("alpha:" + alpha);
stderr.println("normDir:" + normDir);
}
}
double oldValue = value;
boolean first = true;
while (true) {
getNextPoint(alpha);
value = evalL1();
if (DEBUG || verbose) {
stderr.println("alpha:" + alpha);
stderr.println("value:" + value);
stderr.println("oldValue:" + oldValue);
stderr.println("C1:" + C1);
stderr.println("origDirDeriv:" + origDirDeriv);
stderr.println("alpha:" + alpha);
assert !Double.isNaN(value);
assert !Double.isNaN(origDirDeriv);
}
if (!first && value <= (oldValue + C1 * origDirDeriv * alpha)) {
break;
}
first = false;
if (!quiet) {
stderr.print(".");
}
alpha *= backoff;
}
if (!quiet) {
stderr.println();
}
}
