[Abora-cvs] abora-ash/src/org/abora/ash/engine AboraException.java,NONE,1.1 AboraConverter.java,NONE,1.1 WorksStorage.java,NONE,1.1 Endorsement.java,NONE,1.1 Id.java,NONE,1.1 AboraObject.java,NONE,1.1

[<dg...@us...>]

Update of /cvsroot/abora/abora-ash/src/org/abora/ash/engine
In directory sc8-pr-cvs1:/tmp/cvs-serv3306/src/org/abora/ash/engine

Added Files:
	AboraException.java AboraConverter.java WorksStorage.java 
	Endorsement.java Id.java AboraObject.java 
Log Message:
-Add start of Ash subproject, which is currently the beginnings of a port of the dolphin-demo smalltalk server code

--- NEW FILE: AboraException.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

/**
 */
public class AboraException extends Exception {

	/**
	 * Constructor for AboraException.
	 */
	public AboraException() {
		super();
	}

	/**
	 * Constructor for AboraException.
	 * @param message
	 */
	public AboraException(String message) {
		super(message);
	}

	/**
	 * Constructor for AboraException.
	 * @param message
	 * @param cause
	 */
	public AboraException(String message, Throwable cause) {
		super(message, cause);
	}

	/**
	 * Constructor for AboraException.
	 * @param cause
	 */
	public AboraException(Throwable cause) {
		super(cause);
	}

}

--- NEW FILE: AboraConverter.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

/**
 */
public class AboraConverter {

	/**
	 * Constructor for AboraConverter.
	 */
	private AboraConverter() {
		super();
	}
	
	public static byte[] toAboraContent(String s) {
		return s.getBytes();
	}

}

--- NEW FILE: WorksStorage.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

import java.lang.ref.WeakReference;
import java.util.HashSet;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.WeakHashMap;

import org.abora.ash.content.BeWork;

/**
 */
public class WorksStorage extends AboraObject {
	private final Map idLookup = new WeakHashMap();
	private final Set works = new HashSet();
	private BeWork userHome = null;
	private static final WorksStorage INSTANCE = new WorksStorage(); 

//		instanceVariableNames: 'works idLookup userHome'

	public void put(Id id, AboraObject value) {
		//@todo this should probably be somewhere else
		idLookup.put(id, new WeakReference(value));
	}
	public void add(BeWork work) {
		works.add(work);
	}
	public int knownIds() {
		return idLookup.size();
	}
	public AboraObject get(Id id) {
		//@todo this should probably be somewhere else
		WeakReference holder = (WeakReference) idLookup.get(id);
		AboraObject value = holder != null ? (AboraObject) holder.get() : null;
		if (value == null)
			throw new NoSuchElementException("Nothing associated with: "+id);
		return value;
	}
	public void remove(BeWork work) {
		works.remove(work);
	}
//
//	works
//		^works
	public static WorksStorage getInstance() {
		return INSTANCE;
	}

	/**
	 * Returns the userHome.
	 * @return BeWork
	 */
	public BeWork getUserHome() {
		return userHome;
	}

	/**
	 * Sets the userHome.
	 * @param userHome The userHome to set
	 */
	public void setUserHome(BeWork userHome) {
		this.userHome = userHome;
	}

}
--- NEW FILE: Endorsement.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

/**
 */
public class Endorsement extends AboraObject {
	private final Id endorseeId;
	private final Id itemId;

	public Endorsement(Id endorseeId, Id itemId) {
		this.endorseeId = endorseeId;
		this.itemId = itemId;
	}

	public boolean equals(Object o) {
		if (!(o instanceof Endorsement))
			return false;

		Endorsement e = (Endorsement) o;
		return getEndorseeId().equals(e.getEndorseeId()) && getItemId().equals(e.getItemId());
	}
	public boolean checkIntegrity() {
		return true;
	}
	public AboraObject endorsee() {
		throw new UnsupportedOperationException();

		//		#todo "WorksStorage references only make sense on server. Review!!!!!!".
		//		^WorksStorage current lookupId: endorseeId!
	}
	public Id getEndorseeId() {
		return endorseeId;
	}
	public Id getItemId() {
		return itemId;
	}
	public int hashCode() {
		return (getEndorseeId().hashCode() << 1) | getItemId().hashCode();
	}
	public String asString() {
		return "Endorsement(endorseeId=" + getEndorseeId() + ", itemId=" + getItemId() + ")";

	}
}

--- NEW FILE: Id.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

/**
 */
public class Id extends AboraObject {
	private final long value;
	private static long NEXT_VALUE= 1;
	
	public Id() {
		value = NEXT_VALUE++;
	}
	public Id(AboraObject o) {
		this();
		WorksStorage.getInstance().put(this, o);
	}

	public boolean equals(Object o) {
		if (!(o instanceof Id))
			return false;
		Id id = (Id) o;
		return getValue() == id.getValue();
	}
	public int hashCode() {
		return (int)getValue();
	}
	public long getValue() {
		return value;
	}
	public String asString() {
		return "Id("+getValue()+")";
	}
//	nextId
//		| id |
//		id := (self new)
//					value: NextValue;
//					yourself.
//		NextValue := NextValue + 1.
//		^id!
//
//	nextIdFor: anObject
//		| id |
//		id := self nextId.
//		WorksStorage current addId: id with: anObject.
//		^id! !
}

--- NEW FILE: AboraObject.java ---
/*
 * Abora-Ash
 * Part of the Abora hypermedia project: http://www.abora.org
 * Copyright 2003 David G Jones
 */

package org.abora.ash.engine;

/**
 */
public class AboraObject {

}