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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 io.sirix.index.path;

import io.brackit.query.atomic.QNm;
import io.brackit.query.util.path.Path;
import io.sirix.index.path.summary.PathSummaryReader;

import java.util.Set;

public abstract class AbstractPCRCollector implements PCRCollector {
  public PCRValue getPcrValue(Set> paths, PathSummaryReader reader) {
    var maxPCR = reader.getMaxNodeKey();
    var pathClassRecords = reader.getPCRsForPaths(paths);
    return PCRValue.getInstance(maxPCR, pathClassRecords);
  }
}