io.polaris.core.cache.ICache Maven / Gradle / Ivy
package io.polaris.core.cache;
import io.polaris.core.tuple.Ref;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Map;
import java.util.function.Supplier;
/**
* @author Qt
* @since 1.8
*/
public interface ICache {
@Nullable
Ref get(@Nonnull K key);
@Nullable
default V getIfPresent(@Nonnull K key) {
Ref ref = get(key);
return ref == null ? null : ref.get();
}
@Nullable
V get(@Nonnull K key, Supplier loader);
@Nullable
default Ref putIfAbsent(@Nonnull K key, @Nullable V value) {
Ref existingValue = get(key);
if (existingValue == null) {
put(key, value);
}
return existingValue;
}
void put(@Nonnull K key, @Nullable V value);
default void putAll(Map m) {
m.forEach((k, v) -> put(k, v));
}
void remove(K key);
void clear();
}