/**
* Applies a config entry to a component. If the entry is not valid, the method prints an
* exception and returns false.
*
* @param <T> Type of the config option.
* @param component A component object.
* @param entry The configuration entry to set.
* @return True if the config entry could be applied succesfully, otherwise false.
*/
public <T> boolean applyConfigEntry(AbstractComponent component, ConfigEntry<T> entry) {
try {
component.applyConfigEntry(entry);
pool.addConfigEntry(component, entry, true);
return true;
} catch (InvalidConfigOptionValueException e) {
pool.addConfigEntry(component, entry, false);
e.printStackTrace();
return false;
}
}
/**
* Convenience method for testing purposes. If you know that the type of the value is correct, it
* is preferable to create a ConfigEntry object and apply it to the component (no type checking
* necessary).
*
* @param <T> Type of the config option (Integer, String etc.).
* @param component A component.
* @param optionName The name of the config option.
* @param value The value of the config option.
*/
@SuppressWarnings("unchecked")
public <T> void applyConfigEntry(AbstractComponent component, String optionName, T value) {
logger.trace(component);
logger.trace(optionName);
logger.trace(value);
logger.trace(value.getClass());
// first we look whether the component is registered
if (components.contains(component.getClass())) {
// look for a config option with the specified name
ConfigOption<?> option =
(ConfigOption<?>) componentOptionsByName.get(component.getClass()).get(optionName);
if (option != null) {
// check whether the given object has the correct type
if (!option.checkType(value)) {
System.out.println(
"Warning: value "
+ value
+ " is not valid for option "
+ optionName
+ " in component "
+ component
+ ". It does not have the correct type.");
return;
}
// we have checked the type, hence it should now be safe to
// typecast and
// create a ConfigEntry object
ConfigEntry<T> entry = null;
try {
entry = new ConfigEntry<T>((ConfigOption<T>) option, value);
component.applyConfigEntry(entry);
pool.addConfigEntry(component, entry, true);
} catch (InvalidConfigOptionValueException e) {
pool.addConfigEntry(component, entry, false);
System.out.println(
"Warning: value "
+ value
+ " is not valid for option "
+ optionName
+ " in component "
+ component);
}
} else {
logger.warn("Warning: undefined option " + optionName + " in component " + component);
}
} else {
logger.warn("Warning: unregistered component " + component);
}
}
/**
* Gets the value of a config option of the specified component. This is done by first checking,
* which value the given option was set to using {@link #applyConfigEntry(AbstractComponent,
* ConfigEntry)}. If the value has not been changed, the default value for this option is
* returned. Note, that this method will not work properly if the component options are changed
* internally surpassing the component manager (which is discouraged).
*
* @param <T> The type of the config option, e.g. String, boolean, integer.
* @param component The component, which has the specified option.
* @param option The option for which we want to know its value.
* @return The value of the specified option in the specified component.
*/
public <T> T getConfigOptionValue(AbstractComponent component, ConfigOption<T> option) {
T object = pool.getLastValidConfigValue(component, option);
if (object == null) {
return option.getDefaultValue();
} else {
return object;
}
}
/**
* Factory method for creating a reasoner component from a set of knowledge sources.
*
* @see #reasoner(Class, AbstractKnowledgeSource)
* @param <T> The type of this method is a subclass of reasoner component.
* @param reasoner A class object, where the class is subclass of ReasonerComponent.
* @param sources A set of knowledge sources.
* @return A reasoner component.
*/
public <T extends AbstractReasonerComponent> T reasoner(
Class<T> reasoner, Set<AbstractKnowledgeSource> sources) {
if (!reasonerComponents.contains(reasoner)) {
System.err.println(
"Warning: reasoner component " + reasoner + " is not a registered reasoner component.");
}
T rc = invokeConstructor(reasoner, new Class[] {Set.class}, new Object[] {sources});
pool.registerComponent(rc);
return rc;
}
/**
* Factory method for creating a knowledge source.
*
* @param <T> The type of this method is a subclass of knowledge source.
* @param source A registered knowledge source component.
* @return An instance of the given knowledge source class.
*/
public <T extends AbstractKnowledgeSource> T knowledgeSource(Class<T> source) {
if (!knowledgeSources.contains(source)) {
logger.warn(
"Warning: knowledge source "
+ source
+ " is not a registered knowledge source component.");
}
T ks = invokeConstructor(source, new Class[] {}, new Object[] {});
pool.registerComponent(ks);
return ks;
}
/**
* Factory method for creating a learning problem component.
*
* @param <T> The type of this method is a subclass of learning problem.
* @param lpClass A class object, where the class is a subclass of learning problem.
* @param reasoner A reasoning service object.
* @return A learning problem component.
*/
public <T extends AbstractLearningProblem> T learningProblem(
Class<T> lpClass, AbstractReasonerComponent reasoner) {
if (!learningProblems.contains(lpClass)) {
System.err.println(
"Warning: learning problem "
+ lpClass
+ " is not a registered learning problem component.");
}
T lp =
invokeConstructor(
lpClass, new Class[] {AbstractReasonerComponent.class}, new Object[] {reasoner});
pool.registerComponent(lp);
return lp;
}
/**
* Factory method for creating a learning algorithm, which automagically calls the right
* constructor for the given problem.
*
* @param <T> The type of this method is a subclass of learning algorithm.
* @param laClass A class object, where the class is subclass of learning algorithm.
* @param lp A learning problem, which the algorithm should try to solve.
* @param rs A reasoning service for querying the background knowledge of this learning problem.
* @return A learning algorithm component.
* @throws LearningProblemUnsupportedException Thrown when the learning problem and the learning
* algorithm are not compatible.
*/
public <T extends AbstractCELA> T learningAlgorithm(
Class<T> laClass, AbstractLearningProblem lp, AbstractReasonerComponent rs)
throws LearningProblemUnsupportedException {
if (!learningAlgorithms.contains(laClass)) {
System.err.println(
"Warning: learning algorithm "
+ laClass
+ " is not a registered learning algorithm component.");
}
// find the right constructor: use the one that is registered and
// has the class of the learning problem as a subclass
Class<? extends AbstractLearningProblem> constructorArgument = null;
for (Class<? extends AbstractLearningProblem> problemClass :
algorithmProblemsMapping.get(laClass)) {
if (problemClass.isAssignableFrom(lp.getClass())) {
constructorArgument = problemClass;
}
}
if (constructorArgument == null) {
throw new LearningProblemUnsupportedException(
lp.getClass(), laClass, algorithmProblemsMapping.get(laClass));
// System.err.println("Warning: No suitable constructor registered for algorithm "
// + laClass.toStringID() + " and problem " + lp.getClass().toStringID()
// + ". Registered constructors for " + laClass.toStringID() + ": "
// + algorithmProblemsMapping.get(laClass) + ".");
// return null;
}
T la =
invokeConstructor(
laClass,
new Class[] {constructorArgument, AbstractReasonerComponent.class},
new Object[] {lp, rs});
pool.registerComponent(la);
return la;
}
/**
* Retuns a list of all instanciated and registered Components
*
* @return Currently active components.
*/
public List<AbstractComponent> getLiveComponents() {
return pool.getComponents();
}
/**
* Frees all references to components created by <code>ComponentManager</code>.
*
* @see #freeComponent(AbstractComponent)
*/
public synchronized void freeAllComponents() {
pool.clearComponents();
}
/**
* The <code>ComponentManager</code> factory methods produce component instances, which can be
* freed using this method. Calling the factory methods without freeing components when they are
* not used anymore can (in theory) cause memory problems.
*
* @param component The component to free.
*/
public void freeComponent(AbstractComponent component) {
pool.unregisterComponent(component);
}
