Command.java

package userInterface;

import java.util.StringTokenizer;

/*
 * @Copyright QMUL Group A 2005-2006
 */
public class Command {
    private String command;

    private String params[];

    public Command(String line) {
        line = line.trim();

        command = getCommand(line).toLowerCase();
        params = getParams(line);
    }

    public boolean isValidCommand() {
        return command.length() == 0;
    }

    public String getCommand() {
        return command;
    }

    public int size() {
        return params.length;
    }

    public String get(int i) {
        if ( i >= params.length | i < 0 ) return "";
        return params[i];
    }

    public static String getCommand(String line) {
        line = line.trim();

        int i = line.indexOf(" ");
        if (i < 0) {
            return line;
        } else {
            return line.substring(0, i);
        }

    }

    public static String[] getParams(String line) {
        // skip past command
        int i = line.indexOf(" ");
        if (i < 0) {
            return new String[0];
        }

        line = line.substring(i + 1).trim();

        StringTokenizer st = new StringTokenizer(line, ",");
        String params[] = new String[st.countTokens()];
        int param_i = 0;
        while (st.hasMoreTokens()) {
            params[param_i++] = st.nextToken().trim();
        }
        return params;
    }

    public String toString() {
        String paramsStr = "";
        for (int i = 0; i < params.length; i++) {
            if (i > 0) {
                paramsStr = paramsStr + ", ";
            }
            paramsStr = paramsStr + params[i];
        }
        return command + " " + paramsStr;
    }
}