package com.atlassian.cache;
   
   import java.io.Serializable;
   
   import javax.annotation.Nonnull;
   
   import com.atlassian.annotations.Internal;
   
   /**
   * Provides an implementation of the {@link CacheSettings} interface.
   *
   * @since 2.0
   */
  @Internal
  class DefaultCacheSettings implements CacheSettings, Serializable
  {
      private static final long serialVersionUID = 1L;
  
      private final Long expireAfterAccess;
      private final Long expireAfterWrite;
      private final Boolean flushable;
      private final Boolean local;
      private final Integer maxEntries;
      private final Boolean replicateAsynchronously;
      private final Boolean replicateViaCopy;
      private final Boolean statisticsEnabled;
  
      DefaultCacheSettings(Long expireAfterAccess, Long expireAfterWrite, Boolean flushable,
          Boolean local, Integer maxEntries, Boolean replicateAsynchronously, Boolean replicateViaCopy, Boolean statisticsEnabled)
      {
          this.expireAfterAccess = expireAfterAccess;
          this.expireAfterWrite = expireAfterWrite;
          this.flushable = flushable;
          this.local = local;
          this.maxEntries = maxEntries;
          this.replicateAsynchronously = replicateAsynchronously;
          this.replicateViaCopy = replicateViaCopy;
          this.statisticsEnabled = statisticsEnabled;
      }
  
      @Nonnull
      @Override
      public CacheSettings override(@Nonnull CacheSettings overrides)
      {
          return new DefaultCacheSettings(
                  notNullElse(overrides.getExpireAfterAccess(), expireAfterAccess),
                  notNullElse(overrides.getExpireAfterWrite(), expireAfterWrite),
                  notNullElse(overrides.getFlushable(), flushable),
                  notNullElse(overrides.getLocal(), local),
                  notNullElse(overrides.getMaxEntries(), maxEntries),
                  notNullElse(overrides.getReplicateAsynchronously(), replicateAsynchronously),
                  notNullElse(overrides.getReplicateViaCopy(), replicateViaCopy),
                  notNullElse(overrides.getStatisticsEnabled(), statisticsEnabled));
      }
  
      @Override
      public Long getExpireAfterAccess()
      {
          return expireAfterAccess;
      }
  
      @Override
      public long getExpireAfterAccess(long defaultValue)
      {
          return (null == getExpireAfterAccess()) ? defaultValue : getExpireAfterAccess();
      }
  
      @Override
      public Long getExpireAfterWrite()
      {
          return expireAfterWrite;
      }
  
      @Override
      public long getExpireAfterWrite(long defaultValue)
      {
          return (null == getExpireAfterWrite()) ? defaultValue : getExpireAfterWrite();
      }
  
      @Override
      public Boolean getFlushable()
      {
          return flushable;
      }
  
      @Override
      public boolean getFlushable(boolean defaultValue)
      {
          return (null == getFlushable()) ? defaultValue : getFlushable();
      }
  
      @Override
      public Boolean getLocal()
      {
          return local;
      }
  
      @Override
      public boolean getLocal(boolean defaultValue)
     {
         return (null == getLocal()) ? defaultValue : getLocal();
     }
 
     @Override
     public Integer getMaxEntries()
     {
         return maxEntries;
     }
 
     @Override
     public int getMaxEntries(int defaultValue)
     {
         return (null == getMaxEntries()) ? defaultValue : getMaxEntries();
     }
 
     @Override
     public Boolean getReplicateAsynchronously()
     {
         return replicateAsynchronously;
     }
 
     @Override
     public boolean getReplicateAsynchronously(boolean defaultValue)
     {
         return (null == getReplicateAsynchronously()) ? defaultValue : getReplicateAsynchronously();
     }
 
     @Override
     public Boolean getReplicateViaCopy()
     {
         return replicateViaCopy;
     }
 
     @Override
     public boolean getReplicateViaCopy(boolean defaultValue)
     {
         return (null == getReplicateViaCopy()) ? defaultValue : getReplicateViaCopy();
     }
 
     @Override
     public Boolean getStatisticsEnabled()
     {
         return statisticsEnabled;
     }
 
     @Override
     public boolean getStatisticsEnabled(final boolean defaultValue)
     {
         return (null == getStatisticsEnabled()) ? defaultValue : getStatisticsEnabled();
     }
 
     private static <T> T notNullElse(T value, T def)
     {
         return (null != value) ? value : def;
     }
 }