PaimonSnapshotEntryKey.java

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.datasource.paimon;

import org.apache.doris.datasource.NameMapping;

import java.util.Objects;

/** Stable identity for a Paimon projection hydrated from one captured snapshot/schema fence. */
public final class PaimonSnapshotEntryKey {
    private final NameMapping nameMapping;
    private final long snapshotId;
    private final long schemaId;

    public PaimonSnapshotEntryKey(NameMapping nameMapping, long snapshotId, long schemaId) {
        this.nameMapping = Objects.requireNonNull(nameMapping, "nameMapping can not be null");
        this.snapshotId = snapshotId;
        this.schemaId = schemaId;
    }

    public static PaimonSnapshotEntryKey of(NameMapping nameMapping, PaimonSnapshot fence) {
        return new PaimonSnapshotEntryKey(nameMapping, fence.getSnapshotId(), fence.getSchemaId());
    }

    public NameMapping getNameMapping() {
        return nameMapping;
    }

    public long getSnapshotId() {
        return snapshotId;
    }

    public long getSchemaId() {
        return schemaId;
    }

    @Override
    public boolean equals(Object object) {
        if (this == object) {
            return true;
        }
        if (!(object instanceof PaimonSnapshotEntryKey)) {
            return false;
        }
        PaimonSnapshotEntryKey that = (PaimonSnapshotEntryKey) object;
        return snapshotId == that.snapshotId
                && schemaId == that.schemaId
                && nameMapping.equals(that.nameMapping);
    }

    @Override
    public int hashCode() {
        return Objects.hash(nameMapping, snapshotId, schemaId);
    }
}