edu.umass.cs.msocket.proxy.console.commands.GroupMemberList.java Source code

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Here is the source code for edu.umass.cs.msocket.proxy.console.commands.GroupMemberList.java

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/*******************************************************************************
 *
 * Mobility First - mSocket library
 * Copyright (C) 2013, 2014 - University of Massachusetts Amherst
 * Contact: arun@cs.umass.edu
 *
 * 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. 
 *
 * Initial developer(s): Arun Venkataramani, Aditya Yadav, Emmanuel Cecchet.
 * Contributor(s): ______________________.
 *
 *******************************************************************************/

package edu.umass.cs.msocket.proxy.console.commands;

import java.util.StringTokenizer;

import org.json.JSONArray;

import edu.umass.cs.gns.client.UniversalGnsClient;
import edu.umass.cs.gns.console.GnsUtils;
import edu.umass.cs.msocket.proxy.console.ConsoleModule;

/**
 * Command to list members in a group GUID
 * 
 * @author <a href="mailto:cecchet@cs.umass.edu">Emmanuel Cecchet </a>
 * @version 1.0
 */
public class GroupMemberList extends ConsoleCommand {

    /**
     * Creates a new <code>GroupMemberList</code> object
     * 
     * @param module
     */
    public GroupMemberList(ConsoleModule module) {
        super(module);
    }

    @Override
    public String getCommandDescription() {
        return "List members of a group GUID";
    }

    @Override
    public String getCommandName() {
        return "group_member_list";
    }

    @Override
    public String getCommandParameters() {
        return "[group_guid_or_alias]";
    }

    @Override
    public void parse(String commandText) throws Exception {
        UniversalGnsClient gnsClient = module.getGnsClient();
        try {
            StringTokenizer st = new StringTokenizer(commandText.trim());
            String groupGuid;
            if (st.countTokens() == 0) {
                groupGuid = module.getAccountGuid().getGuid();
            } else if (st.countTokens() == 1) {
                groupGuid = st.nextToken();
                if (!GnsUtils.isValidGuidString(groupGuid)) {
                    // We probably have an alias, lookup the GUID
                    groupGuid = gnsClient.lookupGuid(groupGuid);
                }
            } else {
                console.printString("Wrong number of arguments for this command.\n");
                return;
            }

            console.printString("Members in group " + groupGuid);
            console.printNewline();
            JSONArray members = gnsClient.groupGetMembers(groupGuid, module.getAccountGuid());
            for (int i = 0; i < members.length(); i++) {
                console.printString(i + ": " + members.getString(i));
                console.printNewline();
            }
        } catch (Exception e) {
            console.printString("Failed to access GNS ( " + e + ")\n");
        }
    }
}