Cookbook

 1import com.nm.Nm;
 2import com.nm.sdk.data.businessobjects.BusinessObjectRepository;
 3import com.nm.sdk.data.businessobjects.ObjectVersionRef;
 4import com.nm.sdk.data.businessobjects.versioning.HeadFilter;
 5import com.nm.sdk.data.businessobjects.versioning.VersionInfo;
 6
 7import java.util.ArrayList;
 8import java.util.Collections;
 9import java.util.List;
10
11int versionsCount = 0;
12int deletedVersionsCount = 0;
13
14BusinessObjectRepository repository = Nm.getInstance().getBusinessObjectRepository();
15
16// get head version refs of all objects (even deleted ones)
17List headVersionRefs = repository.select(new HeadFilter(true, true));
18
19// sort version refs by type and id
20Collections.sort(headVersionRefs);
21
22// for every object ...
23for (int i = 0; i < headVersionRefs.size(); i++) {
24    ObjectVersionRef headVersionRef = (ObjectVersionRef) headVersionRefs.get(i);
25
26    print(headVersionRef.getType() + ":" + headVersionRef.getId());
27
28    // get all versions of this object
29    List versionInfos = repository.getVersionInfos(headVersionRef.getObjectRef());
30
31    versionsCount += versionInfos.size();
32
33    // sort versions by timestamp (newest version first)
34    Collections.sort(versionInfos);
35    Collections.reverse(versionInfos);
36
37    List list = new ArrayList(versionInfos.size());
38
39    boolean delete = false;
40    for (int j = 0; j < versionInfos.size(); j++) {
41        VersionInfo versionInfo = (VersionInfo) versionInfos.get(j);
42        ObjectVersionRef objectVersionRef = versionInfo.getObjectVersionRef();
43
44        print("   " + versionInfo.getTimestamp() + ": " + versionInfo.getUserId() + ", " + (versionInfo.isCommitted() ? "committed" : "uncommitted") + (versionInfo.isDeleted() ? ", deleted" : ""));
45
46        if (delete) {
47            print("      delete");
48            list.add(objectVersionRef);
49        } else if (versionInfo.isCommitted()) {
50            if (versionInfo.isDeleted()) {
51                print("      delete");
52                list.add(objectVersionRef);
53            } else {
54                print("      keep");
55            }
56            delete = true;
57        } else {
58            print("      keep");
59        }
60
61    }
62
63    deletedVersionsCount += list.size();
64
65    if (!list.isEmpty()) {
66        repository.obliterateVersions(list);
67    }
68
69}
70
71print("objects: " + headVersionRefs.size());
72print("versions: " + versionsCount);
73print("deleted: " + deletedVersionsCount);