39
40 public class ContainmentFilter implements AttrFilter {
41 private Attributes matchingAttrs;
42
43 public ContainmentFilter(Attributes match) {
44 matchingAttrs = match;
45 }
46
47 public boolean check(Attributes attrs) throws NamingException {
48 return matchingAttrs == null ||
49 matchingAttrs.size() == 0 ||
50 contains(attrs, matchingAttrs);
51 }
52
53 // returns true if superset contains subset
54 public static boolean contains(Attributes superset, Attributes subset)
55 throws NamingException {
56 if (subset == null)
57 return true; // an empty set is always a subset
58
59 NamingEnumeration m = subset.getAll();
60 while (m.hasMore()) {
61 if (superset == null) {
62 return false; // contains nothing
63 }
64 Attribute target = (Attribute) m.next();
65 Attribute fromSuper = superset.get(target.getID());
66 if (fromSuper == null) {
67 return false;
68 } else {
69 // check whether attribute values match
70 if (target.size() > 0) {
71 NamingEnumeration vals = target.getAll();
72 while (vals.hasMore()) {
73 if (!fromSuper.contains(vals.next())) {
74 return false;
75 }
76 }
77 }
78 }
79 }
80 return true;
81 }
82
83 }
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39
40 public class ContainmentFilter implements AttrFilter {
41 private Attributes matchingAttrs;
42
43 public ContainmentFilter(Attributes match) {
44 matchingAttrs = match;
45 }
46
47 public boolean check(Attributes attrs) throws NamingException {
48 return matchingAttrs == null ||
49 matchingAttrs.size() == 0 ||
50 contains(attrs, matchingAttrs);
51 }
52
53 // returns true if superset contains subset
54 public static boolean contains(Attributes superset, Attributes subset)
55 throws NamingException {
56 if (subset == null)
57 return true; // an empty set is always a subset
58
59 NamingEnumeration<? extends Attribute> m = subset.getAll();
60 while (m.hasMore()) {
61 if (superset == null) {
62 return false; // contains nothing
63 }
64 Attribute target = m.next();
65 Attribute fromSuper = superset.get(target.getID());
66 if (fromSuper == null) {
67 return false;
68 } else {
69 // check whether attribute values match
70 if (target.size() > 0) {
71 NamingEnumeration<?> vals = target.getAll();
72 while (vals.hasMore()) {
73 if (!fromSuper.contains(vals.next())) {
74 return false;
75 }
76 }
77 }
78 }
79 }
80 return true;
81 }
82
83 }
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