1 files changed, 75 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/prov/rollback/FormerState.java b/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/prov/rollback/FormerState.java
new file mode 100644
index 000000000..f6fa26786
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/prov/rollback/FormerState.java
@@ -0,0 +1,75 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM Corporation and others. All rights reserved. This
+ * program and the accompanying materials are made available under the terms of
+ * the Eclipse Public License v1.0 which accompanies this distribution, and is
+ * available at http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors: IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.equinox.internal.prov.rollback;
+
+import java.util.EventObject;
+import java.util.Hashtable;
+import org.eclipse.equinox.internal.prov.director.IUTransformationHelper;
+import org.eclipse.equinox.prov.core.eventbus.ProvisioningEventBus;
+import org.eclipse.equinox.prov.core.eventbus.SynchronousProvisioningListener;
+import org.eclipse.equinox.prov.engine.*;
+import org.eclipse.equinox.prov.metadata.*;
+import org.eclipse.equinox.prov.metadata.repository.IWritableMetadataRepository;
+import org.osgi.framework.Version;
+
+public class FormerState {
+	IWritableMetadataRepository storage = null;
+
+	Hashtable generatedIUs = new Hashtable(); //key profile id, value the iu representing this profile
+
+	public FormerState(ProvisioningEventBus bus, IWritableMetadataRepository repo) {
+		if (bus == null || repo == null) {
+			throw new IllegalArgumentException("bus and storage can' be null"); //$NON-NLS-1$
+		}
+		storage = repo;
+
+		//listen for pre-event. to memorize the state of the profile
+		bus.addListener(new SynchronousProvisioningListener() {
+			public void notify(EventObject o) {
+				if (o instanceof BeginOperationEvent) {
+					BeginOperationEvent event = (BeginOperationEvent) o;
+					IInstallableUnit iuForProfile = profileToIU(event.getProfile());
+					generatedIUs.put(event.getProfile().getProfileId(), iuForProfile);
+				} else if (o instanceof CommitOperationEvent) {
+					CommitOperationEvent event = (CommitOperationEvent) o;
+					storage.addInstallableUnits(new IInstallableUnit[] {(IInstallableUnit) generatedIUs.get(event.getProfile().getProfileId())});
+					return;
+				} else if (o instanceof RollbackOperationEvent) {
+					RollbackOperationEvent event = (RollbackOperationEvent) o;
+					generatedIUs.remove(event.getProfile().getProfileId());
+					return;
+				}
+				//TODO We need to decide what to do on profile removal				
+				//				else if (o instanceof ProfileEvent) {
+				//					ProfileEvent pe = (ProfileEvent) o;
+				//					if (pe.getReason() == ProfileEvent.REMOVED) {
+				//						profileRegistries.remove(pe.getProfile().getProfileId());
+				//						persist();
+				//					}
+				//				}
+			}
+
+		});
+	}
+
+	IInstallableUnit profileToIU(Profile toConvert) {
+		InstallableUnit result = new InstallableUnit();
+		result.setProperty(IInstallableUnitConstants.PROFILE_IU_KEY, Boolean.TRUE.toString());
+		result.setId(toConvert.getProfileId());
+		result.setVersion(new Version(0, 0, 0, Long.toString(System.currentTimeMillis())));
+		result.setRequiredCapabilities(IUTransformationHelper.toRequirements(toConvert.getInstallableUnits(), false));
+		//TODO Need to do the properties in the profile
+		//TODO Do we need to mark profile with a special marker
+		return result;
+	}
+
+	//	private copyProperty(Profile p) {
+	//		Map profileProperties = p.getValues();
+	//	}
+}