com.gemstone.gemfire.management.internal.cli.converters.MemberGroupConverter Maven / Gradle / Ivy

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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.management.internal.cli.converters;

import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;

import com.gemstone.gemfire.management.cli.ConverterHint;
import com.gemstone.gemfire.management.internal.cli.shell.Gfsh;

import org.springframework.shell.core.Completion;
import org.springframework.shell.core.Converter;
import org.springframework.shell.core.MethodTarget;

/**
 * 
 * @author Abhishek Chaudhari 
 * @since 7.0
 */
public class MemberGroupConverter implements Converter {

  @Override
  public boolean supports(Class type, String optionContext) {
//    System.out.println("MemberGroupConverter.supports("+type+","+optionContext+")");
    return String.class.equals(type) && ConverterHint.MEMBERGROUP.equals(optionContext);
  }

  @Override
  public String convertFromText(String value, Class targetType,
      String optionContext) {
//    System.out.println("MemberGroupConverter.convertFromText("+value+","+targetType+","+optionContext+")");
    return value;
  }

  @Override
  public boolean getAllPossibleValues(List completions,
      Class targetType, String existingData, String optionContext,
      MethodTarget target) {
//    System.out.println("MemberGroupConverter.getAllPossibleValues("+existingData+","+targetType+","+optionContext+")");
    if (String.class.equals(targetType) && ConverterHint.MEMBERGROUP.equals(optionContext)) {
      String[] memberGroupNames = getMemberGroupNames();
      
      for (String memberGroupName : memberGroupNames) {
        completions.add(new Completion(memberGroupName));
      }
    }
    return !completions.isEmpty();
  }

  public Set getMemberGroups() {
    final Gfsh gfsh = Gfsh.getCurrentInstance();
    final Set memberGroups = new TreeSet();

    if (gfsh != null && gfsh.isConnectedAndReady()) {
      final String[] memberGroupsArray = gfsh.getOperationInvoker().getDistributedSystemMXBean().listGroups();
      memberGroups.addAll(Arrays.asList(memberGroupsArray));
    }

    return memberGroups;
  }

  private String[] getMemberGroupNames() {
    final Set memberGroups = getMemberGroups();
    return memberGroups.toArray(new String[memberGroups.size()]);
  }

}