servercommand.java

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    /* CRMS, customer relationship management system
    Copyright (C) 2003  Service To Youth Council

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    For further information contact the SYC ICT department on [e-mail]
    98 Kermode Street
    North Adelaide
    South Australia
    SA 5006 
    [phone]
    */
package crms.util;

import java.util.*;
import crms.form.FormSubmission;

/**
 * <p>Represents a command or request made from the client to the server.</p>
 * <p>May simply be a request for information, or could be a command
 *  to update information.</p>
 *
 * @author  dmurphy
 */
public class ServerCommand {

    public static String PARAM_USER = "user";
    
    public static String PARAM_REQUEST_FORM = "form.request";
    public static String PARAM_FORM_NAME = "form.name";
    
    public static String PARAM_FORM_SUBMIT = "form.submit";
    
    private String key = null;
    
    private HashMap params = new HashMap();
    private String user = null;
    
    /** Creates a new instance of ServerCommand */
    public ServerCommand() { }
    
    public ServerCommand(String key) {
        this.key = key;
    }
    
    public ServerCommand(FormSubmission result) {
        setKey(ServerCommand.PARAM_FORM_SUBMIT);
        
        Iterator it = result.fieldNames();
        setParameter(ServerCommand.PARAM_FORM_NAME, result.getFormName());
        while (it.hasNext()) {
            String field = (String) it.next();
            String value = result.getFieldValue(field);
            
            setParameter(field, value);
        }
        
    }
    
    public void setKey(String key) {
        this.key = key;
    }
    
    public String getKey() {
        return key;
    }
    
    public void setUser(String user) {
        this.user = user;
    }
    
    public String getUser() {
        return user;
    }
    
    public HashMap getParameters() {
        return params;
    }
    
    public void setParameters(HashMap params) {
        this.params = params;
    }
    
    public Object getParameterValue(String paramName) {
        if (paramName.equals(PARAM_USER)) {
            return getUser();
        }
        return params.get(paramName.toLowerCase());
    }
    
    public void setParameter(String name, AbstractCode code) {
        if (code != null) {
            setParameter(name, code.getCode());
        }
    }
    
    public void setParameter(String name, Object value) {
        if (name.equals(PARAM_USER)) {
            throw new RuntimeException("Can't set user with setParameter!");
        }
        if (params.containsKey(name.toLowerCase())) {
            params.remove(name);
        }
        params.put(name.toLowerCase(), value);
    }
    
    public Iterator getParameterNames() {
        return params.keySet().iterator();
    }
    
    public static ServerCommand requestForm(String formName) {
        ServerCommand command = new ServerCommand();
        command.setKey(PARAM_REQUEST_FORM);
        
        command.setParameter(PARAM_FORM_NAME, formName);
        return command;
    }
}