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1 files changed, 267 insertions, 0 deletions

diff --git a/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EODatabase.java b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EODatabase.java
new file mode 100644
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+++ b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/access/EODatabase.java
@@ -0,0 +1,267 @@
+/*
+ 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 java.util.Enumeration;
+
+import net.wotonomy.control.EOEnterpriseObject;
+import net.wotonomy.control.EOGlobalID;
+import net.wotonomy.foundation.NSArray;
+import net.wotonomy.foundation.NSDictionary;
+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 class EODatabase {
+
+	protected EOAdaptor _adaptor;
+	protected NSMutableArray _models = new NSMutableArray();
+	protected NSMutableArray _contexts = new NSMutableArray();
+	protected NSMutableDictionary _resultCache = new NSMutableDictionary();
+	protected NSMutableDictionary _snapshots = new NSMutableDictionary();
+	protected NSTimestamp _timestamp;
+	protected static boolean _releaseUnrefSnapshots = true;
+
+	public EODatabase(EOAdaptor adaptor) {
+		super();
+		if (adaptor == null)
+			throw new IllegalArgumentException("Adaptor cannot be null.");
+		_adaptor = adaptor;
+	}
+
+	public EODatabase(EOModel model) {
+		super();
+		_adaptor = EOAdaptor.adaptorWithModel(model);
+		addModel(model);
+	}
+
+	public EOAdaptor adaptor() {
+		return _adaptor;
+	}
+
+	public void addModel(EOModel model) {
+		if (!addModelIfCompatible(model))
+			throw new IllegalArgumentException("Model is not compatible with this database.");
+	}
+
+	public void removeMode(EOModel model) {
+		_models.removeObject(model);
+	}
+
+	public boolean addModelIfCompatible(EOModel model) {
+		if (_models.containsObject(model))
+			return false;
+		if (model.adaptorName().equals(adaptor().name())) {
+			if (adaptor().canServiceModel(model)) {
+				_models.addObject(model);
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public void decrementSnapshotCountForGlobalID(EOGlobalID gid) {
+		if (_releaseUnrefSnapshots) {
+		}
+	}
+
+	public void incrementSnapshotCountForGlobalID(EOGlobalID gid) {
+		if (_releaseUnrefSnapshots) {
+		}
+	}
+
+	public static void disableSnapshotRefCounting() {
+		_releaseUnrefSnapshots = false;
+	}
+
+	public EOEntity entityForObject(EOEnterpriseObject eo) {
+		String cname = eo.getClass().getName();
+		for (int i = 0; i < _models.count(); i++) {
+			EOModel m = (EOModel)_models.objectAtIndex(i);
+			NSArray ents = m.entities();
+			for (int j = 0; j < ents.count(); j++) {
+				EOEntity e = (EOEntity)ents.objectAtIndex(i);
+				if (e.className().equals(cname))
+					return e;
+			}
+		}
+		return null;
+	}
+
+	public EOEntity entityNamed(String name) {
+		for (int i = 0; i < _models.count(); i++) {
+			EOModel m = (EOModel)_models.objectAtIndex(i);
+			NSArray ents = m.entities();
+			for (int j = 0; j < ents.count(); j++) {
+				EOEntity e = (EOEntity)ents.objectAtIndex(i);
+				if (e.name().equals(name))
+					return e;
+			}
+		}
+		return null;
+	}
+
+	public void forgetAllSnapshots() {
+		_snapshots.removeAllObjects();
+	}
+
+	public void forgetSnapshotForGlobalID(EOGlobalID gid) {
+		_snapshots.removeObjectForKey(gid);
+	}
+
+	public void forgetSnapshotsForGlobalIDs(NSArray gids) {
+		for (int i = 0; i < gids.count(); i++)
+			forgetSnapshotForGlobalID((EOGlobalID)gids.objectAtIndex(i));
+	}
+
+	public void handleDroppedConnection() {
+		adaptor().handleDroppedConnection();
+		for (int i = 0; i < _contexts.count(); i++) {
+			EODatabaseContext c = (EODatabaseContext)_contexts.objectAtIndex(i);
+			c.handleDroppedConnection();
+		}
+	}
+
+	public void invalidateResultCache() {
+		_resultCache.removeAllObjects();
+	}
+
+	public void invalidateResultCacheForEntityNamed(String name) {
+		_resultCache.removeObjectForKey(name);
+	}
+
+	public NSArray models() {
+		return new NSArray(_models);
+	}
+
+	public void recordSnapshotForGlobalID(NSDictionary snap, EOGlobalID gid) {
+		_snapshots.setObjectForKey(snap, gid);
+	}
+
+	public void recordSnapshotForSourceGlobalID(NSArray gids, EOGlobalID gid, String name) {
+		NSMutableDictionary d = (NSMutableDictionary)_snapshots.objectForKey(gid);
+		if (d == null) {
+			d = new NSMutableDictionary();
+			_snapshots.setObjectForKey(d, gid);
+		}
+		d.setObjectForKey(gids, name);
+	}
+
+	public void recordSnapshots(NSDictionary snaps) {
+		_snapshots.addEntriesFromDictionary(snaps);
+	}
+
+	public void recordToManySnapshots(NSDictionary snaps) {
+		Enumeration enumeration = snaps.keyEnumerator();
+		while (enumeration.hasMoreElements()) {
+			EOGlobalID gid = (EOGlobalID)enumeration.nextElement();
+			NSDictionary rels = (NSDictionary)snaps.objectForKey(gid);
+			Enumeration relEnum = rels.keyEnumerator();
+			while (relEnum.hasMoreElements()) {
+				String relName = (String)relEnum.nextElement();
+				NSArray gids = (NSArray)rels.objectForKey(relName);
+				recordSnapshotForSourceGlobalID(gids, gid, relName);
+			}
+		}
+	}
+
+	public void registerContext(EODatabaseContext context) {
+		if (!_contexts.contains(context)) {
+			if (context.database() != this)
+				throw new IllegalStateException("Cannot register context assigned to a different database.");
+			_contexts.addObject(context);
+		}
+	}
+
+	public void unregisterContext(EODatabaseContext context) {
+		_contexts.removeObject(context);
+	}
+
+	public NSArray registeredContexts() {
+		return new NSArray(_contexts);
+	}
+
+	public NSArray resultCacheForEntityNamed(String name) {
+		return (NSArray)_resultCache.objectForKey(name);
+	}
+
+	public void setResultCache(NSArray cache, String entityName) {
+		_resultCache.setObjectForKey(cache, entityName);
+	}
+
+	public void setTimestampToNow() {
+		_timestamp = new NSTimestamp();
+	}
+
+	public NSDictionary snapshotForGlobalID(EOGlobalID gid) {
+		return (NSDictionary)_snapshots.objectForKey(gid);
+	}
+
+	public NSDictionary snapshotForGlobalID(EOGlobalID gid, long l) {
+		return null;
+	}
+
+	public NSArray snapshotForSourceGlobalID(EOGlobalID gid, String name) {
+		NSDictionary d = (NSDictionary)_snapshots.objectForKey(gid);
+		if (d == null)
+			return null;
+		return (NSArray)d.objectForKey(name);
+	}
+
+	public NSDictionary snapshotForSourceGlobalID(EOGlobalID gid, String s, long l) {
+		return null;
+	}
+
+	public NSDictionary snapshots() {
+		return _snapshots;
+	}
+
+	public long timestampForGlobalID(EOGlobalID gid) {
+		return NSTimestamp.DistantPast.timeIntervalSinceReferenceDate();
+	}
+
+	public long timestampForSourceGlobalID(EOGlobalID gid, String s) {
+		return 0;
+	}
+
+}
+/*
+ * $Log$
+ * Revision 1.2  2006/02/16 16:47:13  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  2005/05/11 15:21:53  cgruber
+ * Change enum to enumeration, since enum is now a keyword as of Java 5.0
+ *
+ * A few other comments in the code.
+ *
+ * Revision 1.1  2003/08/19 01:54:43  chochos
+ * The EODatabase layer still needs a lot of work, but it's on its way...
+ *
+ */
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