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package support;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
/**
* Tracks classes by name and whether those classes are enabled or not.
*
* @author Peter Wu
* @param <T> The type of classes that are to be tracked.
*/
public class ClassEnabledTracker<T> {
private final Map<String, Class<? extends T>> allowedClasses;
private final Map<String, Boolean> enabledClasses;
public ClassEnabledTracker(Map<String, Class<? extends T>> allowedClasses) {
this.allowedClasses = allowedClasses;
this.enabledClasses = new TreeMap<>();
for (String name : getNames()) {
enabledClasses.put(name, false);
}
}
public Set<String> getNames() {
return allowedClasses.keySet();
}
public Set<String> getEnabled() {
Set<String> enabled = new TreeSet<>();
for (Map.Entry<String, Boolean> e : enabledClasses.entrySet()) {
if (e.getValue()) {
enabled.add(e.getKey());
}
}
return enabled;
}
public Set<String> getDisabled() {
Set<String> disabled = new TreeSet<>(getNames());
disabled.removeAll(getEnabled());
return disabled;
}
public String getNameByClass(Class<T> aClass) {
for (Map.Entry<String, Class<? extends T>> e : allowedClasses.entrySet()) {
if (e.getValue() == aClass) {
return e.getKey();
}
}
return null;
}
public Class<? extends T> getClassByName(String name) {
return allowedClasses.get(name);
}
public boolean has(String name) {
return allowedClasses.containsKey(name);
}
public void disable(String name) {
enabledClasses.put(name, false);
}
public void enable(String name) {
enabledClasses.put(name, true);
}
public void disableAll() {
setEnabledAll(false);
}
public void enableAll() {
setEnabledAll(true);
}
private void setEnabledAll(boolean enabled) {
for (Map.Entry<String, Boolean> e : enabledClasses.entrySet()) {
e.setValue(enabled);
}
}
public void enableClasses(List<T> classes) {
for (T t : classes) {
String name = getNameByClass((Class<T>) t.getClass());
if (name != null) {
enabledClasses.put(name, true);
}
}
}
}
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