content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.hive.service.cli.operation;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.hadoop.hive.conf.HiveConf;
  import org.apache.hadoop.hive.metastore.IMetaStoreClient;
  import org.apache.hadoop.hive.metastore.api.Table;
  import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
  import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObject;
  import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObjectUtils;
  import org.apache.hive.service.cli.FetchOrientation;
  import org.apache.hive.service.cli.HiveSQLException;
  import org.apache.hive.service.cli.OperationState;
  import org.apache.hive.service.cli.OperationType;
  import org.apache.hive.service.cli.RowSet;
  import org.apache.hive.service.cli.RowSetFactory;
  import org.apache.hive.service.cli.TableSchema;
  import org.apache.hive.service.cli.session.HiveSession;
  
  /**
   * GetTablesOperation.
   *
   */
  public class GetTablesOperation extends MetadataOperation {
  
    private final String catalogName;
    private final String schemaName;
    private final String tableName;
    private final List<String> tableTypes = new ArrayList<String>();
    private final RowSet rowSet;
    private final TableTypeMapping tableTypeMapping;
  
  
    private static final TableSchema RESULT_SET_SCHEMA = new TableSchema()
    .addStringColumn("TABLE_CAT", "Catalog name. NULL if not applicable.")
    .addStringColumn("TABLE_SCHEM", "Schema name.")
    .addStringColumn("TABLE_NAME", "Table name.")
    .addStringColumn("TABLE_TYPE", "The table type, e.g. \"TABLE\", \"VIEW\", etc.")
    .addStringColumn("REMARKS", "Comments about the table.");
  
    protected GetTablesOperation(HiveSession parentSession,
        String catalogName, String schemaName, String tableName,
        List<String> tableTypes) {
      super(parentSession, OperationType.GET_TABLES);
      this.catalogName = catalogName;
      this.schemaName = schemaName;
      this.tableName = tableName;
      String tableMappingStr = getParentSession().getHiveConf()
          .getVar(HiveConf.ConfVars.HIVE_SERVER2_TABLE_TYPE_MAPPING);
      tableTypeMapping =
          TableTypeMappingFactory.getTableTypeMapping(tableMappingStr);
      if (tableTypes != null) {
        this.tableTypes.addAll(tableTypes);
      }
      this.rowSet = RowSetFactory.create(RESULT_SET_SCHEMA, getProtocolVersion());
    }
  
    @Override
    public void runInternal() throws HiveSQLException {
      setState(OperationState.RUNNING);
      try {
        IMetaStoreClient metastoreClient = getParentSession().getMetaStoreClient();
        String schemaPattern = convertSchemaPattern(schemaName);
        List<String> matchingDbs = metastoreClient.getDatabases(schemaPattern);
        if(isAuthV2Enabled()){
          List<HivePrivilegeObject> privObjs = HivePrivilegeObjectUtils.getHivePrivDbObjects(matchingDbs);
          String cmdStr = "catalog : " + catalogName + ", schemaPattern : " + schemaName;
          authorizeMetaGets(HiveOperationType.GET_TABLES, privObjs, cmdStr);
        }
  
        String tablePattern = convertIdentifierPattern(tableName, true);
        for (String dbName : metastoreClient.getDatabases(schemaPattern)) {
          List<String> tableNames = metastoreClient.getTables(dbName, tablePattern);
          for (Table table : metastoreClient.getTableObjectsByName(dbName, tableNames)) {
            Object[] rowData = new Object[] {
                DEFAULT_HIVE_CATALOG,
                table.getDbName(),
                table.getTableName(),
                tableTypeMapping.mapToClientType(table.getTableType()),
                table.getParameters().get("comment")
                };
            if (tableTypes.isEmpty() || tableTypes.contains(
                  tableTypeMapping.mapToClientType(table.getTableType()))) {
              rowSet.addRow(rowData);
            }
          }
        }
        setState(OperationState.FINISHED);
      } catch (Exception e) {
        setState(OperationState.ERROR);
        throw new HiveSQLException(e);
      }
    }
  
    /* (non-Javadoc)
     * @see org.apache.hive.service.cli.Operation#getResultSetSchema()
     */
    @Override
    public TableSchema getResultSetSchema() throws HiveSQLException {
      assertState(OperationState.FINISHED);
      return RESULT_SET_SCHEMA;
    }
  
    /* (non-Javadoc)
     * @see org.apache.hive.service.cli.Operation#getNextRowSet(org.apache.hive.service.cli.FetchOrientation, long)
     */
    @Override
    public RowSet getNextRowSet(FetchOrientation orientation, long maxRows) throws HiveSQLException {
      assertState(OperationState.FINISHED);
      validateDefaultFetchOrientation(orientation);
      if (orientation.equals(FetchOrientation.FETCH_FIRST)) {
        rowSet.setStartOffset(0);
      }
      return rowSet.extractSubset((int)maxRows);
    }
  }
  