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.calcite.sql.parser.parserextensiontesting;
  
  import org.apache.calcite.sql.SqlAlter;
  import org.apache.calcite.sql.SqlKind;
  import org.apache.calcite.sql.SqlNode;
  import org.apache.calcite.sql.SqlOperator;
  import org.apache.calcite.sql.SqlSpecialOperator;
  import org.apache.calcite.sql.SqlWriter;
  import org.apache.calcite.sql.parser.SqlParserPos;
  
  import java.util.List;
  
  /**
   * Simple test example of a custom alter system call.
   */
  public class SqlUploadJarNode extends SqlAlter {
    public static final SqlOperator OPERATOR =
        new SqlSpecialOperator("UPLOAD JAR", SqlKind.OTHER_DDL);
  
    private final List<SqlNode> jarPaths;
  
    /** Creates a SqlUploadJarNode. */
    public SqlUploadJarNode(SqlParserPos pos, String scope, List<SqlNode> jarPaths) {
      super(pos, scope);
      this.jarPaths = jarPaths;
    }
  
    @Override public SqlOperator getOperator() {
      return OPERATOR;
    }
  
    @Override public List<SqlNode> getOperandList() {
      return jarPaths;
    }
  
    @Override protected void unparseAlterOperation(SqlWriter writer, int leftPrec, int rightPrec) {
      writer.keyword("UPLOAD");
      writer.keyword("JAR");
      SqlWriter.Frame frame = writer.startList("", "");
      for (SqlNode jarPath : jarPaths) {
        jarPath.unparse(writer, leftPrec, rightPrec);
      }
      writer.endList(frame);
    }
  }
  