/**
* Copyright (C) 2002-2012 The FreeCol Team
*
* This file is part of FreeCol.
*
* FreeCol 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.
*
* FreeCol 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 FreeCol. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.freecol.common.networking;
import net.sf.freecol.common.model.Game;
import net.sf.freecol.common.model.EquipmentType;
import net.sf.freecol.common.model.Player;
import net.sf.freecol.common.model.Unit;
import net.sf.freecol.server.FreeColServer;
import net.sf.freecol.server.model.ServerPlayer;
import org.w3c.dom.Element;
/**
* Class to handle equipping a unit.
*/
public class EquipUnitMessage extends DOMMessage {
/**
* The id of the unit.
*/
private String unitId;
/**
* The id of the equipment type.
*/
private String typeId;
/**
* The amount of equipment.
*/
private String amountString;
/**
* Create a new <code>EquipUnitMessage</code> for the supplied unit and
* equipment type and amount.
*
* @param unit The <code>Unit</code> to equip.
* @param type The <code>EquipmentType</code> to equip with.
* @param amount The amount of equipment.
*/
public EquipUnitMessage(Unit unit, EquipmentType type, int amount) {
this.unitId = unit.getId();
this.typeId = type.getId();
this.amountString = Integer.toString(amount);
}
/**
* Create a new <code>EquipUnitMessage</code> from a supplied element.
*
* @param game The <code>Game</code> this message belongs to.
* @param element The <code>Element</code> to use to create the message.
*/
public EquipUnitMessage(Game game, Element element) {
this.unitId = element.getAttribute("unit");
this.typeId = element.getAttribute("type");
this.amountString = element.getAttribute("amount");
}
/**
* Handle a "equipUnit"-message.
*
* @param server The <code>FreeColServer</code> handling the message.
* @param player The <code>Player</code> the message applies to.
* @param connection The <code>Connection</code> message received on.
*
* @return An update encapsulating the equipUnit location change
* or an error <code>Element</code> on failure.
*/
public Element handle(FreeColServer server, Player player,
Connection connection) {
ServerPlayer serverPlayer = server.getPlayer(connection);
Game game = server.getGame();
Unit unit;
try {
unit = server.getUnitSafely(unitId, serverPlayer);
} catch (Exception e) {
return DOMMessage.clientError(e.getMessage());
}
if (unit.isInEurope()) {
; // Always OK
} else if (unit.getTile() == null) {
return DOMMessage.clientError("Unit is not on the map: "
+ unitId);
} else if (unit.getSettlement() == null) {
return DOMMessage.clientError("Unit is not in a settlement: "
+ unitId);
}
EquipmentType type = game.getSpecification().getEquipmentType(typeId);
if (type == null) {
return DOMMessage.clientError("Bad equipment type: " + typeId);
}
int amount;
try {
amount = Integer.parseInt(amountString);
} catch (NumberFormatException e) {
return DOMMessage.clientError("Bad amount: " + amountString);
}
if (amount == 0) {
return DOMMessage.clientError("Amount must be non-zero: "
+ amountString);
} else if (amount > 0) {
if (!unit.canBeEquippedWith(type)) {
return DOMMessage.clientError("Unable to equip unit " + unitId
+ " with " + typeId);
}
} else {
if (-amount > unit.getEquipmentCount(type)) {
return DOMMessage.clientError("Too much to remove ("
+ (-amount) + ") of " + typeId
+ " from unit " + unitId);
}
}
// Proceed to equip.
return server.getInGameController()
.equipUnit(serverPlayer, unit, type, amount);
}
/**
* Convert this EquipUnitMessage to XML.
*
* @return The XML representation of this message.
*/
public Element toXMLElement() {
Element result = createNewRootElement(getXMLElementTagName());
result.setAttribute("unit", unitId);
result.setAttribute("type", typeId);
result.setAttribute("amount", amountString);
return result;
}
/**
* The tag name of the root element representing this object.
*
* @return "equipUnit".
*/
public static String getXMLElementTagName() {
return "equipUnit";
}
}