PaimonSource.java

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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.datasource.paimon.source;

import org.apache.doris.analysis.TupleDescriptor;
import org.apache.doris.catalog.TableIf;
import org.apache.doris.common.UserException;
import org.apache.doris.datasource.ExternalCatalog;
import org.apache.doris.datasource.ExternalTable;
import org.apache.doris.datasource.mvcc.MvccSnapshot;
import org.apache.doris.datasource.mvcc.MvccUtil;
import org.apache.doris.datasource.paimon.PaimonExternalTable;
import org.apache.doris.datasource.paimon.PaimonSysExternalTable;
import org.apache.doris.thrift.TFileAttributes;

import com.google.common.annotations.VisibleForTesting;
import org.apache.paimon.table.Table;

import java.util.Optional;

public class PaimonSource {
    private final ExternalTable paimonExtTable;
    private final Table originTable;
    private final TupleDescriptor desc;

    @VisibleForTesting
    public PaimonSource() {
        this.desc = null;
        this.paimonExtTable = null;
        this.originTable = null;
    }

    public PaimonSource(TupleDescriptor desc) {
        this.desc = desc;
        this.paimonExtTable = (ExternalTable) desc.getTable();
        this.originTable = resolvePaimonTable(paimonExtTable);
    }

    public TupleDescriptor getDesc() {
        return desc;
    }

    public Table getPaimonTable() {
        return originTable;
    }

    public TableIf getTargetTable() {
        return paimonExtTable;
    }

    public ExternalTable getExternalTable() {
        return paimonExtTable;
    }

    private Table resolvePaimonTable(ExternalTable table) {
        Optional<MvccSnapshot> snapshot = MvccUtil.getSnapshotFromContext(table);
        if (table instanceof PaimonExternalTable) {
            return ((PaimonExternalTable) table).getPaimonTable(snapshot);
        }
        if (table instanceof PaimonSysExternalTable) {
            return ((PaimonSysExternalTable) table).getSysPaimonTable();
        }
        throw new IllegalArgumentException(
                "Expected Paimon table but got " + table.getClass().getSimpleName());
    }

    public TFileAttributes getFileAttributes() throws UserException {
        return new TFileAttributes();
    }

    public ExternalCatalog getCatalog() {
        return paimonExtTable.getCatalog();
    }

    public String getFileFormatFromTableProperties() {
        return originTable.options().getOrDefault("file.format", "parquet");
    }
}