001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.hbtop.screen.top;
019
020import java.util.List;
021import java.util.stream.Collectors;
022import org.apache.hadoop.hbase.hbtop.RecordFilter;
023import org.apache.hadoop.hbase.hbtop.screen.AbstractScreenView;
024import org.apache.hadoop.hbase.hbtop.screen.Screen;
025import org.apache.hadoop.hbase.hbtop.screen.ScreenView;
026import org.apache.hadoop.hbase.hbtop.terminal.KeyPress;
027import org.apache.hadoop.hbase.hbtop.terminal.Terminal;
028import org.apache.yetus.audience.InterfaceAudience;
029
030
031/**
032 * The filter display mode in the top screen.
033 *
034 * Exit if Enter key is pressed.
035 */
036@InterfaceAudience.Private
037public class FilterDisplayModeScreenView extends AbstractScreenView {
038
039  private final int row;
040  private final FilterDisplayModeScreenPresenter filterDisplayModeScreenPresenter;
041
042  public FilterDisplayModeScreenView(Screen screen, Terminal terminal, int row,
043    List<RecordFilter> filters, ScreenView nextScreenView) {
044    super(screen, terminal);
045    this.row = row;
046    this.filterDisplayModeScreenPresenter =
047      new FilterDisplayModeScreenPresenter(this, filters, nextScreenView);
048  }
049
050  @Override
051  public void init() {
052    filterDisplayModeScreenPresenter.init();
053  }
054
055  @Override
056  public ScreenView handleKeyPress(KeyPress keyPress) {
057    if (keyPress.getType() == KeyPress.Type.Enter) {
058      return filterDisplayModeScreenPresenter.returnToNextScreen();
059    }
060    return this;
061  }
062
063  public void showFilters(List<RecordFilter> filters) {
064    String filtersString = "none";
065    if (!filters.isEmpty()) {
066      filtersString = String.join(" + ",
067        filters.stream().map(f -> String.format("'%s'", f)).collect(Collectors.toList()));
068    }
069
070    getTerminalPrinter(row).startBold().print("<Enter> to resume, filters: " + filtersString)
071      .stopBold().endOfLine();
072  }
073}