com.gemstone.gemfire.management.internal.cli.converters.HintTopicConverter 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.List;
import java.util.Set;

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

import com.gemstone.gemfire.management.cli.ConverterHint;
import com.gemstone.gemfire.management.internal.cli.CommandManager;

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

  @Override
  public boolean supports(Class type, String optionContext) {
    return String.class.equals(type) && ConverterHint.HINTTOPIC.equals(optionContext);
  }

  @Override
  public String convertFromText(String value, Class targetType,
      String optionContext) {
    return value;
  }

  @Override
  public boolean getAllPossibleValues(List completions,
      Class targetType, String existingData, String optionContext,
      MethodTarget target) {
    if (String.class.equals(targetType) && ConverterHint.HINTTOPIC.equals(optionContext)) {
      CommandManager commandManager = CommandManager.getExisting();
      if (commandManager != null) {
        Set topicNames = commandManager.getTopicNames();
        
        for (String topicName : topicNames) {
          if (existingData != null && !existingData.isEmpty()) {
            if (topicName.startsWith(existingData)) { // match exact case
              completions.add(new Completion(topicName));
            } else if (topicName.toLowerCase().startsWith(existingData.toLowerCase())) {  // match case insensitive
              String completionStr = existingData + topicName.substring(existingData.length());
              
              completions.add(new Completion(completionStr));
            }
          } else {
            completions.add(new Completion(topicName));
          }
        }
      }
    }

    return !completions.isEmpty();
  }
}