HudiMvccSnapshot.java

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package org.apache.doris.datasource.hudi;

import org.apache.doris.datasource.TablePartitionValues;
import org.apache.doris.datasource.mvcc.MvccSnapshot;

/**
 * Implementation of MvccSnapshot for Hudi tables that maintains partition values
 * for MVCC (Multiversion Concurrency Control) operations.
 * This class is immutable to ensure thread safety.
 */
public class HudiMvccSnapshot implements MvccSnapshot {
    private final TablePartitionValues tablePartitionValues;

    /**
     * Creates a new HudiMvccSnapshot with the specified partition values.
     *
     * @param tablePartitionValues The partition values for the snapshot
     * @throws IllegalArgumentException if tablePartitionValues is null
     */
    public HudiMvccSnapshot(TablePartitionValues tablePartitionValues) {
        if (tablePartitionValues == null) {
            throw new IllegalArgumentException("TablePartitionValues cannot be null");
        }
        this.tablePartitionValues = tablePartitionValues;
    }

    /**
     * Gets the table partition values associated with this snapshot.
     *
     * @return The immutable TablePartitionValues object
     */
    public TablePartitionValues getTablePartitionValues() {
        return tablePartitionValues;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        HudiMvccSnapshot that = (HudiMvccSnapshot) o;
        return tablePartitionValues.equals(that.tablePartitionValues);
    }

    @Override
    public int hashCode() {
        return tablePartitionValues.hashCode();
    }

    @Override
    public String toString() {
        return String.format("HudiMvccSnapshot{tablePartitionValues=%s}", tablePartitionValues);
    }
}