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1
4 package gnu.xml;
5 import gnu.lists.*;
6 import gnu.mapping.Symbol;
7
8
10
11 public class NamedChildrenFilter extends FilterConsumer
12 {
13 String  namespaceURI;
14 String localName;
15
16 int level;
17 int matchLevel;
18
19 public static NamedChildrenFilter
20 make (String namespaceURI, String localName, Consumer out)
21 {
22 return new NamedChildrenFilter(namespaceURI, localName, out);
23 }
24
25 public NamedChildrenFilter (String namespaceURI, String localName,
26 Consumer out)
27 {
28 super(out);
29 this.namespaceURI = namespaceURI;
30 this.localName = localName;
31 skipping = true;
32 }
33
34 public void beginDocument()
35 {
36 level++;
37 super.beginDocument();
38 }
39
40 public void endDocument()
41 {
42 level--;
43 super.endDocument();
44 }
45
46 public void beginGroup(Object type)
47 {
48 if (skipping && level == 1 )
52 {
53 String curNamespaceURI;
54 String curLocalName;
55 if (type instanceof Symbol)
56 {
57 Symbol qname = (Symbol) type;
58 curNamespaceURI = qname.getNamespaceURI();
59 curLocalName = qname.getLocalName();
60 }
61 else
62 {
63 curNamespaceURI = "";
64 curLocalName = type.toString().intern(); }
66 if ((localName == curLocalName || localName == null)
67 && (namespaceURI == curNamespaceURI || namespaceURI == null))
68 {
69 skipping = false;
70 matchLevel = level;
71 }
72 }
73
74 super.beginGroup(type);
75 level++;
76 }
77
78 public void endGroup()
79 {
80 level--;
81 super.endGroup();
82 if (! skipping && matchLevel == level)
83 skipping = true;
84 }
85
86 public void writeObject(Object val)
87 {
88 if (val instanceof SeqPosition)
89 {
90 SeqPosition pos = (SeqPosition) val;
91 if (pos.sequence instanceof TreeList)
92 {
93 ((TreeList) pos.sequence).consumeNext(pos.ipos, this);
94 return;
95 }
96 }
97 if (val instanceof Consumable)
98 ((Consumable) val).consume(this);
99 else
100 super.writeObject(val);
101 }
102 }
103
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