io.sirix.cache.IndexLogKey Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of sirix-core Show documentation

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.

There is a newer version: 0.11.0

Show newest version

package io.sirix.cache;

import io.sirix.index.IndexType;
import org.checkerframework.checker.index.qual.NonNegative;

/**
 * Index log key.
 *
 * @author Johannes Lichtenberger
 */
public final class IndexLogKey {
  private IndexType indexType;
  private long recordPageKey;
  private @NonNegative int indexNumber;
  private @NonNegative int revisionNumber;

  public IndexLogKey(IndexType indexType, long recordPageKey, @NonNegative int indexNumber,
      @NonNegative int revisionNumber) {
    this.indexType = indexType;
    this.recordPageKey = recordPageKey;
    this.indexNumber = indexNumber;
    this.revisionNumber = revisionNumber;
  }

  public IndexLogKey setIndexType(IndexType indexType) {
    this.indexType = indexType;
    return this;
  }

  public IndexLogKey setRecordPageKey(long recordPageKey) {
    this.recordPageKey = recordPageKey;
    return this;
  }

  public IndexLogKey setIndexNumber(int indexNumber) {
    this.indexNumber = indexNumber;
    return this;
  }

  public IndexLogKey setRevisionNumber(int revisionNumber) {
    this.revisionNumber = revisionNumber;
    return this;
  }

  private int hash;

  @Override
  public int hashCode() {
    if (hash == 0) {
      hash = indexType.getID() + Long.hashCode(recordPageKey) + indexNumber + revisionNumber;
    }
    return hash;
  }

  public long getRecordPageKey() {
    return recordPageKey;
  }

  public IndexType getIndexType() {
    return indexType;
  }

  public int getIndexNumber() {
    return indexNumber;
  }

  public int getRevisionNumber() {
    return revisionNumber;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == this)
      return true;
    if (obj == null || obj.getClass() != this.getClass())
      return false;
    var that = (IndexLogKey) obj;
    return this.indexType == that.indexType && this.recordPageKey == that.recordPageKey
        && this.indexNumber == that.indexNumber && this.revisionNumber == that.revisionNumber;
  }

  @Override
  public String toString() {
    return "IndexLogKey[" + "indexType=" + indexType + ", " + "recordPageKey=" + recordPageKey + ", " + "indexNumber="
        + indexNumber + ", " + "revisionNumber=" + revisionNumber + ']';
  }

}