74 lines
1.7 KiB
Java
74 lines
1.7 KiB
Java
package envoy.client.data;
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import java.io.Serializable;
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import java.util.*;
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/**
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* Stores a heterogeneous map of {@link Cache} objects with different type parameters.
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*
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* @author Kai S. K. Engelbart
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* @since Envoy Client v0.1-beta
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*/
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public final class CacheMap implements Serializable {
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private final Map<Class<?>, Cache<?>> map = new HashMap<>();
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private static final long serialVersionUID = 1L;
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/**
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* Adds a cache to the map.
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*
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* @param <T> the type accepted by the cache
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* @param key the class that maps to the cache
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* @param cache the cache to store
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* @since Envoy Client v0.1-beta
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*/
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public <T> void put(Class<T> key, Cache<T> cache) {
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map.put(key, cache);
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}
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/**
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* Returns a cache mapped by a class.
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*
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* @param <T> the type accepted by the cache
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* @param key the class that maps to the cache
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* @return the cache
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* @since Envoy Client v0.1-beta
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*/
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public <T> Cache<T> get(Class<T> key) {
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return (Cache<T>) map.get(key);
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}
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/**
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* Returns a cache mapped by a class or any of its subclasses.
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*
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* @param <T> the type accepted by the cache
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* @param key the class that maps to the cache
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* @return the cache
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* @since Envoy Client v0.1-beta
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*/
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public <T> Cache<? super T> getApplicable(Class<T> key) {
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Cache<? super T> cache = get(key);
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if (cache == null)
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for (final var e : map.entrySet())
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if (e.getKey().isAssignableFrom(key))
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cache = (Cache<? super T>) e.getValue();
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return cache;
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}
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/**
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* @return the map in which the caches are stored
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* @since Envoy Client v0.1-beta
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*/
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public Map<Class<?>, Cache<?>> getMap() { return map; }
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/**
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* Clears the caches of this map of any values.
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*
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* @since Envoy Client v0.2-beta
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*/
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public void clear() {
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map.values().forEach(Cache::clear);
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}
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}
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