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Administration tool to handle access rights within the CLARUS proxy

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package eu.clarussecure.arm;

import eu.clarussecure.arm.dao.CLARUSARMDAO;
import eu.clarussecure.proxy.access.SimpleMongoUserAccess;

public class ShowRights extends Command {

    private String username;

    public ShowRights(String[] args) throws CommandParserException {
        parseCommandArgs(args);
    }

    @Override
    public CommandReturn execute() throws CommandExecutionException {
        this.verifyRights("admin");

        // Get the DAO instanc and set the rights on the DB
        CLARUSARMDAO dao = CLARUSARMDAO.getInstance();
        String rights = dao.showRights(this.username);
        dao.deleteInstance();

        CommandReturn cr = new CommandReturn(0, rights);
        return cr;
    }

    @Override
    public boolean parseCommandArgs(String[] args) throws CommandParserException {
        // First, sanity check
        if (!args[0].toLowerCase().equals("show_rights"))
            throw new CommandParserException(
                    "Why a non-'show_rights' command ended up in the 'show_rights' part of the parser?");

        try {
            this.username = args[1];
        } catch (ArrayIndexOutOfBoundsException e) {
            throw new CommandParserException("The field 'username' was not given and it is required.");
        }

        this.parseCredentials(args);

        return true;
    }
}