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Improvements for 'DefaultSystemChannelTypeProvider' (#807)

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* Use constructor dependency injection
* Added nullness annotations

Signed-off-by: Christoph Weitkamp <github@christophweitkamp.de>
This commit is contained in:
Christoph Weitkamp 2019-05-09 07:51:56 +02:00 committed by Markus Rathgeb
parent b5f33d341d
commit 2a9485bc3b
1 changed files with 22 additions and 31 deletions
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53
bundles/org.openhab.core.thing/src/main/java/org/eclipse/smarthome/core/thing/DefaultSystemChannelTypeProvider.java
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@ -24,6 +24,7 @@ import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.eclipse.jdt.annotation.NonNullByDefault;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.smarthome.core.thing.i18n.ChannelTypeI18nLocalizationService;
import org.eclipse.smarthome.core.thing.type.ChannelType;
@ -37,6 +38,7 @@ import org.eclipse.smarthome.core.types.StateDescriptionFragmentBuilder;
import org.eclipse.smarthome.core.types.StateOption;
import org.eclipse.smarthome.core.util.BundleResolver;
import org.osgi.framework.Bundle;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
@ -52,6 +54,7 @@ import org.osgi.service.component.annotations.Reference;
* @author Stefan Triller - Added more system channels
* @author Christoph Weitkamp - factored out common i18n aspects into ThingTypeI18nLocalizationService
*/
@NonNullByDefault
@Component
public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
@ -279,16 +282,16 @@ public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
.build();
private static class LocalizedChannelTypeKey {
public final String locale;
public @Nullable final String locale;
public final UID uid;
public LocalizedChannelTypeKey(UID uid, String locale) {
public LocalizedChannelTypeKey(UID uid, @Nullable String locale) {
this.uid = uid;
this.locale = locale;
}
@Override
public boolean equals(Object obj) {
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
@ -335,13 +338,21 @@ public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
SYSTEM_MEDIA_ARTIST, SYSTEM_WIND_DIRECTION, SYSTEM_WIND_SPEED, SYSTEM_OUTDOOR_TEMPERATURE,
SYSTEM_ATMOSPHERIC_HUMIDITY, SYSTEM_BAROMETRIC_PRESSURE).collect(Collectors.toList()));
private final Map<LocalizedChannelTypeKey, ChannelType> localizedChannelTypeCache = new ConcurrentHashMap<>();
private final Map<LocalizedChannelTypeKey, @Nullable ChannelType> localizedChannelTypeCache = new ConcurrentHashMap<>();
private ChannelTypeI18nLocalizationService channelTypeI18nLocalizationService;
private BundleResolver bundleResolver;
private final ChannelTypeI18nLocalizationService channelTypeI18nLocalizationService;
private final BundleResolver bundleResolver;
@Activate
public DefaultSystemChannelTypeProvider(
final @Reference ChannelTypeI18nLocalizationService channelTypeI18nLocalizationService,
final @Reference BundleResolver bundleResolver) {
this.channelTypeI18nLocalizationService = channelTypeI18nLocalizationService;
this.bundleResolver = bundleResolver;
}
@Override
public Collection<ChannelType> getChannelTypes(Locale locale) {
public @Nullable Collection<ChannelType> getChannelTypes(@Nullable Locale locale) {
final List<ChannelType> allChannelTypes = new ArrayList<>();
final Bundle bundle = bundleResolver.resolveBundle(DefaultSystemChannelTypeProvider.class);
@ -352,7 +363,7 @@ public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
}
@Override
public ChannelType getChannelType(ChannelTypeUID channelTypeUID, Locale locale) {
public @Nullable ChannelType getChannelType(ChannelTypeUID channelTypeUID, @Nullable Locale locale) {
final Bundle bundle = bundleResolver.resolveBundle(DefaultSystemChannelTypeProvider.class);
for (final ChannelType channelType : CHANNEL_TYPES) {
@ -363,27 +374,7 @@ public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
return null;
}
@Reference
public void setChannelTypeI18nLocalizationService(
final ChannelTypeI18nLocalizationService channelTypeI18nLocalizationService) {
this.channelTypeI18nLocalizationService = channelTypeI18nLocalizationService;
}
public void unsetChannelTypeI18nLocalizationService(
final ChannelTypeI18nLocalizationService channelTypeI18nLocalizationService) {
this.channelTypeI18nLocalizationService = null;
}
@Reference
public void setBundleResolver(BundleResolver bundleResolver) {
this.bundleResolver = bundleResolver;
}
public void unsetBundleResolver(BundleResolver bundleResolver) {
this.bundleResolver = bundleResolver;
}
private ChannelType createLocalizedChannelType(Bundle bundle, ChannelType channelType, Locale locale) {
private ChannelType createLocalizedChannelType(Bundle bundle, ChannelType channelType, @Nullable Locale locale) {
LocalizedChannelTypeKey localizedChannelTypeKey = getLocalizedChannelTypeKey(channelType.getUID(), locale);
ChannelType cachedEntry = localizedChannelTypeCache.get(localizedChannelTypeKey);
@ -400,14 +391,14 @@ public class DefaultSystemChannelTypeProvider implements ChannelTypeProvider {
}
}
private @Nullable ChannelType localize(Bundle bundle, ChannelType channelType, Locale locale) {
private @Nullable ChannelType localize(Bundle bundle, ChannelType channelType, @Nullable Locale locale) {
if (channelTypeI18nLocalizationService == null) {
return null;
}
return channelTypeI18nLocalizationService.createLocalizedChannelType(bundle, channelType, locale);
}
private LocalizedChannelTypeKey getLocalizedChannelTypeKey(UID uid, Locale locale) {
private LocalizedChannelTypeKey getLocalizedChannelTypeKey(UID uid, @Nullable Locale locale) {
return new LocalizedChannelTypeKey(uid, locale != null ? locale.toLanguageTag() : null);
}
}