tajo-cli/src/main/java/org/apache/tajo/cli/tsql/TajoFileHistory.java

/**
 * 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.tajo.cli.tsql;

import jline.console.history.FileHistory;
import org.apache.tajo.cli.tsql.commands.ExitCommand;

import java.io.File;
import java.io.IOException;

public class TajoFileHistory extends FileHistory {

  public TajoFileHistory(File file) throws IOException {
    super(file);
  }

  @Override
  public void add(CharSequence item) {
    // Don't store an exit command. Most users wouldn't want it.
    if (item.equals(ExitCommand.COMMAND_STRING)) {
      return;
    }
    super.add(item);
  }
}