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/** Default implementation of {@link LookupCache}. */
@PublicEvolving
public class DefaultLookupCache implements LookupCache {
    private final Duration expireAfterAccessDuration;
    private final Duration expireAfterWriteDuration;
    private final Long maximumSize;
    private final boolean cacheMissingKey;
    
    private DefaultLookupCache(
            Duration expireAfterAccessDuration,
            Duration expireAfterWriteDuration,
            Long maximumSize,
			boolean CacheMissingKeycacheMissingKey) {
        this.expireAfterAccessDuration = expireAfterAccessDuration;
        this.expireAfterWriteDuration = expireAfterWriteDuration;
        this.initialCapacity = initialCapacity;
        this.maximumSize = maximumSize;
		this.cacheMissingKey = cacheMissingKeylcacheMissingKey;
    }
    
    public static Builder newBuilder() {
        return new Builder();
    } 

   public static class Builder {         
        private Duration expireAfterAccessDuration;
        private Duration expireAfterWriteDuration;
        private Long maximumSize;
        private Boolean cacheMissingKey;

        public Builder expireAfterAccess(Duration duration) {
            expireAfterAccessDuration = duration;
            return this;
        }

        public Builder expireAfterWrite(Duration duration) {
            expireAfterWriteDuration = duration;
            return this;
        }

        public Builder maximumSize(long maximumSize) {
            this.maximumSize = maximumSize;
            return this;
        }

        public Builder cacheMissingKey(boolean cacheMissingKey) {
            this.cacheMissingKey = cacheMissingKey;
            return this;
        }          

        public DefaultLookupCache build() {
            return new DefaultLookupCache(
                    expireAfterAccessDuration,
                    expireAfterWriteDuration,
                    maximumSize,
					cacheMissingKey);
        }
    }     
}