RevertCommitController.java

package org.eclipse.emf.emfstore.client.model.controller;

import java.util.List;

import org.eclipse.emf.emfstore.client.model.ProjectSpace;
import org.eclipse.emf.emfstore.client.model.WorkspaceManager;
import org.eclipse.emf.emfstore.client.model.connectionmanager.ServerCall;
import org.eclipse.emf.emfstore.common.model.util.ModelUtil;
import org.eclipse.emf.emfstore.server.exceptions.EmfStoreException;
import org.eclipse.emf.emfstore.server.model.versioning.ChangePackage;
import org.eclipse.emf.emfstore.server.model.versioning.PrimaryVersionSpec;

public class RevertCommitController extends ServerCall<Void> {

	private final ProjectSpace projectSpace;
	private final PrimaryVersionSpec versionSpec;

	public RevertCommitController(ProjectSpace projectSpace, final PrimaryVersionSpec versionSpec) {
		this.projectSpace = projectSpace;
		this.versionSpec = versionSpec;
	}

	@Override
	protected Void run() throws EmfStoreException {
		ProjectSpace revertSpace = WorkspaceManager.getInstance().getCurrentWorkspace()
			.checkout(projectSpace.getUsersession(), projectSpace.getProjectInfo(), versionSpec);
		PrimaryVersionSpec sourceVersion = ModelUtil.clone(versionSpec);
		sourceVersion.setIdentifier(sourceVersion.getIdentifier() - 1);
		List<ChangePackage> changes = revertSpace.getChanges(sourceVersion, versionSpec);
		if (changes.size() != 1) {
			throw new EmfStoreException("Zero or more than 1 Change Package received for one revision!");
		}
		ChangePackage changePackage = changes.get(0);
		ChangePackage reversedChangePackage = changePackage.reverse();
		reversedChangePackage.apply(revertSpace.getProject(), true);
		return null;
	}
}