package com.atlassian.marketplace.client.api;
   
   import java.net.URI;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   /**
    * Abstraction of the URI of a set of query results that can be pulled from the server.
    * @see Page
   */
  public final class PageReference<T>
  {
      private final URI uri;
      private final QueryBounds bounds;
      private final PageReader<T> reader;
      
      public PageReference(URI uri, QueryBounds bounds, PageReader<T> reader)
      {
          this.uri = checkNotNull(uri);
          this.bounds = checkNotNull(bounds);
          this.reader = checkNotNull(reader);
      }
      
      /**
       * The REST URI of the result page.
       */
      public URI getUri()
      {
          return uri;
      }
      
      /**
       * The starting offset and limit of the result page.
       */
      public QueryBounds getBounds()
      {
          return bounds;
      }
      
      public PageReader<T> getReader()
      {
          return reader;
      }
      
      @SuppressWarnings("unchecked")
      @Override
      public boolean equals(Object other)
      {
          if (other instanceof PageReference)
          {
              PageReference<T> p = (PageReference<T>) other;
              return uri.equals(p.uri) && bounds.equals(p.bounds); 
          }
          return false;
      }
      
      @Override
      public int hashCode()
      {
          return uri.hashCode() + bounds.hashCode();
      }
  }