/**
* 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.server.ai;
import java.util.logging.Logger;
import org.freecolandroid.xml.stream.XMLStreamException;
import org.freecolandroid.xml.stream.XMLStreamReader;
import org.freecolandroid.xml.stream.XMLStreamWriter;
import net.sf.freecol.common.model.Location;
import net.sf.freecol.common.model.UnitType;
import org.w3c.dom.Element;
/**
* Represents the need for a worker within a <code>Colony</code>.
*/
public class WorkerWish extends Wish {
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(WorkerWish.class.getName());
private UnitType unitType;
private boolean expertNeeded;
/**
* Creates a new <code>WorkerWish</code>.
*
* @param aiMain The main AI-object.
* @param destination The <code>Location</code> in which the
* {@link Wish#getTransportable transportable} assigned to
* this <code>WorkerWish</code> will have to reach.
* @param value The value identifying the importance of
* this <code>Wish</code>.
* @param unitType The type of unit needed for releasing this wish
* completly.
* @param expertNeeded Determines wether the <code>unitType</code> is
* required or not.
*/
public WorkerWish(AIMain aiMain, Location destination, int value, UnitType unitType, boolean expertNeeded) {
super(aiMain, getXMLElementTagName() + ":" + aiMain.getNextID());
if (destination == null) {
throw new NullPointerException("destination == null");
}
this.destination = destination;
setValue(value);
this.unitType = unitType;
this.expertNeeded = expertNeeded;
}
/**
* Creates a new <code>WorkerWish</code> from the given
* XML-representation.
*
* @param aiMain The main AI-object.
* @param element The root element for the XML-representation
* of a <code>WorkerWish</code>.
*/
public WorkerWish(AIMain aiMain, Element element) {
super(aiMain, element.getAttribute(ID_ATTRIBUTE));
readFromXMLElement(element);
}
/**
* Creates a new <code>WorkerWish</code> from the given
* XML-representation.
*
* @param aiMain The main AI-object.
* @param id The unique ID of this object.
*/
public WorkerWish(AIMain aiMain, String id) {
super(aiMain, id);
}
/**
* Creates a new <code>WorkerWish</code> from the given
* XML-representation.
*
* @param aiMain The main AI-object.
* @param in The input stream containing the XML.
* @throws XMLStreamException if a problem was encountered
* during parsing.
*/
public WorkerWish(AIMain aiMain, XMLStreamReader in) throws XMLStreamException {
super(aiMain, in.getAttributeValue(null, ID_ATTRIBUTE));
readFromXML(in);
}
/**
* Updates this <code>WorkerWish</code> with the
* given attributes.
*
* @param value The value identifying the importance of
* this <code>Wish</code>.
* @param unitType The type of unit needed for releasing this wish
* completly.
* @param expertNeeded Determines wether the <code>unitType</code> is
* required or not.
*/
public void update(int value, UnitType unitType, boolean expertNeeded) {
setValue(value);
this.unitType = unitType;
this.expertNeeded = expertNeeded;
}
/**
* Returns the type of unit needed for releasing this wish.
* @return The type of unit.
*/
public UnitType getUnitType() {
return unitType;
}
/**
* Writes this object to an XML stream.
*
* @param out The target stream.
* @throws XMLStreamException if there are any problems writing
* to the stream.
*/
protected void toXMLImpl(XMLStreamWriter out) throws XMLStreamException {
if (destination == null) {
// Avoid writing corrupt WorkerWish, mitigating #3084370.
return;
}
out.writeStartElement(getXMLElementTagName());
out.writeAttribute(ID_ATTRIBUTE, getId());
out.writeAttribute("destination", destination.getId());
if (transportable != null) {
out.writeAttribute("transportable", transportable.getId());
}
out.writeAttribute("value", Integer.toString(getValue()));
out.writeAttribute("unitType", unitType.getId());
out.writeAttribute("expertNeeded", Boolean.toString(expertNeeded));
out.writeEndElement();
}
/**
* Reads information for this object from an XML stream.
*
* @param in The input stream with the XML.
* @throws XMLStreamException if there are any problems reading
* from the stream.
*/
protected void readFromXMLImpl(XMLStreamReader in)
throws XMLStreamException {
setId(in.getAttributeValue(null, ID_ATTRIBUTE));
destination = (Location) getAIMain().getFreeColGameObject(in.getAttributeValue(null, "destination"));
final String transportableStr = in.getAttributeValue(null, "transportable");
if (transportableStr != null) {
transportable = (Transportable) getAIMain().getAIObject(transportableStr);
if (transportable == null) {
transportable = new AIUnit(getAIMain(), transportableStr);
}
} else {
transportable = null;
}
setValue(Integer.parseInt(in.getAttributeValue(null, "value")));
unitType = getSpecification().getUnitType(in.getAttributeValue(null, "unitType"));
expertNeeded = Boolean.valueOf(in.getAttributeValue(null, "expertNeeded")).booleanValue();
in.nextTag();
attachToDestination();
}
@Override
public String toString() {
return "workerWish: " + unitType.getNameKey()
+ " (" + getValue() + (expertNeeded ? ", expert)" : ")");
}
/**
* Returns the tag name of the root element representing this object.
*
* @return "workerWish"
*/
public static String getXMLElementTagName() {
return "workerWish";
}
}