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SirixDB is a hybrid on-disk and in-memory document oriented, versioned database system. It has a lightweight buffer manager, stores everything in a huge persistent and durable tree and allows efficient reconstruction of every revision. Furthermore, SirixDB implements change tracking, diffing and supports time travel queries.

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package org.sirix.io;

import com.google.common.collect.ForwardingObject;
import org.sirix.api.PageReadOnlyTrx;
import org.sirix.page.PageReference;
import org.sirix.page.RevisionRootPage;
import org.sirix.page.interfaces.Page;

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Forwards all methods to the delegate.
 *
 * @author Johannes Lichtenberger, University of Konstanz
 *
 */
public abstract class AbstractForwardingReader extends ForwardingObject implements Reader {

  /** Constructor for use by subclasses. */
  protected AbstractForwardingReader() {}

  @Override
  public Page read(PageReference reference, @Nullable PageReadOnlyTrx pageReadTrx) {
    return delegate().read(reference, pageReadTrx);
  }

  @Override
  public PageReference readUberPageReference() {
    return delegate().readUberPageReference();
  }

  @Override
  public RevisionRootPage readRevisionRootPage(int revision, PageReadOnlyTrx pageReadTrx) {
    return delegate().readRevisionRootPage(revision, pageReadTrx);
  }

  @Override
  protected abstract Reader delegate();
}