public MockCatalogBuilder workspace(String name, String uri) {
    String wsId = newId();
    String nsId = newId();

    final WorkspaceInfo ws = createNiceMock(WorkspaceInfo.class);
    workspaces.add(ws);
    expect(ws.getId()).andReturn(wsId).anyTimes();
    expect(ws.getName()).andReturn(name).anyTimes();
    expect(ws.getMetadata()).andReturn(new MetadataMap()).anyTimes();

    expect(catalog.getWorkspace(wsId)).andReturn(ws).anyTimes();
    expect(catalog.getWorkspaceByName(name)).andReturn(ws).anyTimes();

    final NamespaceInfo ns = createNiceMock(NamespaceInfo.class);
    namespaces.add(ns);

    expect(ns.getId()).andReturn(nsId).anyTimes();
    expect(ns.getName()).andReturn(name).anyTimes();
    expect(ns.getPrefix()).andReturn(name).anyTimes();
    expect(ns.getMetadata()).andReturn(new MetadataMap()).anyTimes();

    expect(catalog.getNamespace(nsId)).andReturn(ns).anyTimes();
    expect(catalog.getNamespaceByPrefix(name)).andReturn(ns).anyTimes();
    expect(catalog.getNamespaceByURI(uri)).andReturn(ns).anyTimes();

    ws.accept((CatalogVisitor) anyObject());
    expectLastCall()
        .andAnswer(
            new VisitAnswer() {
              @Override
              protected void doVisit(CatalogVisitor visitor) {
                visitor.visit(ws);
              }
            })
        .anyTimes();

    ns.accept((CatalogVisitor) anyObject());
    expectLastCall()
        .andAnswer(
            new VisitAnswer() {
              @Override
              protected void doVisit(CatalogVisitor visitor) {
                visitor.visit(ns);
              }
            })
        .anyTimes();

    callback.onWorkspace(name, ws, this);

    replay(ws, ns);
    return this;
  }
  public void visit(WorkspaceInfo workspace) {
    // remove owned stores
    for (StoreInfo s : catalog.getStoresByWorkspace(workspace, StoreInfo.class)) {
      s.accept(this);
    }

    // remove any linked namespaces
    NamespaceInfo ns = catalog.getNamespaceByPrefix(workspace.getName());
    if (ns != null) {
      ns.accept(this);
    }

    catalog.remove(workspace);
  }