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diff --git a/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EOAdaptor.java b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EOAdaptor.java
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+++ b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EOAdaptor.java
@@ -0,0 +1,269 @@
+/*
+ Wotonomy: OpenStep design patterns for pure Java applications.
+ Copyright (C) 2001 Michael Powers
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see http://www.gnu.org
+ */
+package net.wotonomy.access;
+
+import net.wotonomy.foundation.NSArray;
+import net.wotonomy.foundation.NSData;
+import net.wotonomy.foundation.NSDictionary;
+import net.wotonomy.foundation.NSKeyValueCoding;
+import net.wotonomy.foundation.NSMutableArray;
+import net.wotonomy.foundation.NSMutableDictionary;
+import net.wotonomy.foundation.NSTimestamp;
+
+/**
+*
+* @author ezamudio@nasoft.com
+* @author $Author: cgruber $
+* @version $Revision: 894 $
+*/
+
+public abstract class EOAdaptor {
+
+	protected String _name;
+	protected NSDictionary _connectionDictionary = NSDictionary.EmptyDictionary;
+	protected NSMutableArray _contexts = new NSMutableArray();
+	protected Class _expressionClass;
+	private static NSMutableDictionary _expressionClassesByName = new NSMutableDictionary();
+
+	public EOAdaptor(String name) {
+		super();
+		_name = name;
+	}
+
+	/**
+	 * Creates an adaptor with model's adaptorName and sets its connection
+	 * dictionary to the model's connection dictionary.
+	 * @param model The model to take adaptorName and connectionDictionary from.
+	 * @return The adaptor specified in model.
+	 */
+	public static EOAdaptor adaptorWithModel(EOModel model) {
+		if (model == null)
+			throw new IllegalArgumentException("Model must not be null.");
+		if (model.adaptorName() == null || model.adaptorName().length() == 0)
+			throw new IllegalArgumentException("Cannot create an adaptor with an empty name.");
+		EOAdaptor adaptor = adaptorWithName(model.adaptorName());
+		if (adaptor == null)
+			throw new IllegalArgumentException("Cannot create adaptor with name " + model.adaptorName());
+		adaptor.setConnectionDictionary(model.connectionDictionary());
+		return adaptor;
+	}
+
+	/**
+	 * Instantiates an adaptor of a concrete EOAdaptor subclass, based on name.
+	 * If name is a fully qualified class name, then it returns an instance of that class
+	 * by invoking the constructor with a string argument. Otherwise, it
+	 * tries to find a class called (name)Adaptor in a package called
+	 * net.wotonomy.(lowercase name)adaptor; if it can't find one, an exception is raised.
+	 * @param name The name of the adaptor, or a fully qualified class name.
+	 * @return
+	 */
+	public static EOAdaptor adaptorWithName(String name) {
+		Class adaptorClass = null;
+		String cname = null;
+		if (name.endsWith("Adaptor") && name.indexOf('.') > 0) {
+			cname = name;
+			int lastdot = name.lastIndexOf('.');
+			//take off the package and the 'Adaptor' suffix
+			name = cname.substring(lastdot, cname.length() - 7);
+		} else {
+			//construct the fully qualified class name
+			cname = "net.wotonomy." + name.toLowerCase() + "adaptor." + name + "Adaptor";
+		}
+		try {
+			adaptorClass = Class.forName(cname);
+		} catch (ClassNotFoundException ex) {
+			throw new IllegalArgumentException("Cannot find class named " + name);
+		}
+		EOAdaptor adaptor = null;
+		java.lang.reflect.Constructor callme = null;
+		try {
+			callme = adaptorClass.getConstructor(new Class[]{ String.class });
+			adaptor = (EOAdaptor)callme.newInstance((Object[])new String[]{ name });
+		} catch (ClassCastException ex) {
+			throw new IllegalArgumentException("Class " + adaptorClass.getName() + " must inherit from net.wotonomy.access.EOAdaptor");
+		}catch (Exception ex) {
+			throw new IllegalArgumentException("Cannot find or invoke constructor with name argument in class " + adaptorClass.getName());
+		}
+		return adaptor;
+	}
+
+	public static void setExpressionClassName(String expClassName, String adaptorClassName) {
+		_expressionClassesByName.setObjectForKey(expClassName, adaptorClassName);
+	}
+	public static String expressionClassName(String adaptorClassName) {
+		return (String)_expressionClassesByName.objectForKey(adaptorClassName);
+	}
+
+	public void assignExternalInfoForAttribute(EOAttribute attribute) {
+		if (!attribute.isDerived()) {
+			attribute.setColumnName(attribute.name().toUpperCase());
+		}
+		assignExternalTypeForAttribute(attribute);
+	}
+
+	public void assignExternalTypeForAttribute(EOAttribute attribute) {
+	}
+
+	public void assignExternalInfoForEntity(EOEntity entity) {
+		entity.setExternalName(entity.name().toUpperCase());
+	}
+
+	public void assignExternalInfoForEntireModel(EOModel model) {
+		NSArray ents = model.entities();
+		for (int i = 0; i < ents.count(); i++) {
+			EOEntity e = (EOEntity)ents.objectAtIndex(i);
+			//TODO: check that entity is not a prototypes entity
+			NSArray atts = e.attributes();
+			for (int j = 0; j < atts.count(); j++) {
+				EOAttribute a = (EOAttribute)atts.objectAtIndex(i);
+				assignExternalInfoForAttribute(a);
+			}
+			assignExternalInfoForEntity(e);
+		}
+	}
+
+	public boolean canServiceModel(EOModel model) {
+		NSDictionary mcd = model.connectionDictionary();
+		if (mcd == null && _connectionDictionary == null)
+			return true;
+		if (mcd == null || _connectionDictionary == null)
+			return false;
+		return mcd.equals(_connectionDictionary);
+	}
+
+	public void setConnectionDictionary(NSDictionary connection) {
+		_connectionDictionary = connection;
+	}
+	public NSDictionary connectionDictionary() {
+		return _connectionDictionary;
+	}
+
+	public NSArray contexts() {
+		return new NSArray(_contexts);
+	}
+
+	public abstract void assertConnectionDictionaryIsValid();
+
+	public abstract EOAdaptorContext createAdaptorContext();
+
+	public abstract Class defaultExpressionClass();
+
+	public abstract EOSQLExpressionFactory expressionFactory();
+
+	public abstract boolean isValidQualifierType(String typeName, EOModel model);
+
+	public Class expressionClass() {
+		if (_expressionClass != null)
+			return _expressionClass;
+		String cname = expressionClassName(name());
+		if (cname != null) {
+			try {
+				_expressionClass = Class.forName(cname);
+			} catch (ClassNotFoundException ex) {
+				throw new IllegalStateException("Cannot find expression class named " + cname);
+			}
+		}
+		return defaultExpressionClass();
+	}
+
+	public NSArray externalTypesWithModel(EOModel model) {
+		return NSArray.EmptyArray;
+	}
+
+	public NSData fetchedValueForDataValue(NSData value, EOAttribute attr) {
+		return value;
+	}
+
+	public NSTimestamp fetchedValueForDateValue(NSTimestamp value, EOAttribute attr) {
+		return value;
+	}
+
+	public Number fetchedValueForNumberValue(Number value, EOAttribute attr) {
+		return value;
+	}
+
+	public String fetchedValueForStringValue(String value, EOAttribute attr) {
+		return value;
+	}
+
+	public Object fetchedValueForValue(Object value, EOAttribute attr) {
+		if (value == NSKeyValueCoding.NullValue)
+			return value;
+		if (value instanceof String)
+			return fetchedValueForStringValue((String)value, attr);
+		if (value instanceof NSData)
+			return fetchedValueForDataValue((NSData)value, attr);
+		if (value instanceof Number)
+			return fetchedValueForNumberValue((Number)value, attr);
+		if (value instanceof NSTimestamp)
+			return fetchedValueForDateValue((NSTimestamp)value, attr);
+		return value;
+	}
+
+	public void handleDroppedConnection() {
+		for (int i = 0; i < _contexts.count(); i++) {
+			EOAdaptorContext c = (EOAdaptorContext)_contexts.objectAtIndex(i);
+			c.transactionDidRollback();
+			c.handleDroppedConnection();
+		}
+		_contexts.removeAllObjects();
+	}
+
+	public boolean hasOpenChannels() {
+		for (int i = 0; i < _contexts.count(); i++) {
+			EOAdaptorContext c = (EOAdaptorContext)_contexts.objectAtIndex(i);
+			if (c.hasOpenChannels())
+				return true;
+		}
+		return false;
+	}
+
+	public String internalTypeForExternalType(String extType, EOModel model) {
+		return null;
+	}
+
+	public boolean isDroppedConnectionException(Exception ex) {
+		return false;
+	}
+
+	public String name() {
+		return _name;
+	}
+
+	public NSArray prototypeAttributes() {
+		return NSArray.EmptyArray;
+	}
+
+}
+/*
+ * $Log$
+ * Revision 1.2  2006/02/16 16:47:14  cgruber
+ * Move some classes in to "internal" packages and re-work imports, etc.
+ *
+ * Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions.
+ *
+ * Revision 1.1  2006/02/16 13:19:57  cgruber
+ * Check in all sources in eclipse-friendly maven-enabled packages.
+ *
+ * Revision 1.2  2005/12/08 06:52:32  cgruber
+ * Move tests, improve build.xml, and make certain casts explicit so that Java 1.5 doesn't complain about varargs.
+ *
+ * Revision 1.1  2003/08/13 00:37:45  chochos
+ * an almost complete implementation of the abstract adaptor-layer classes
+ *
+ */
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