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1
4 package gnu.kawa.xml;
5 import gnu.bytecode.*;
6 import gnu.lists.*;
7 import gnu.xml.*;
8 import gnu.expr.*;
9 import java.io.*;
10 import gnu.mapping.Symbol;
11
12
15
16 public class AttributeType extends NodeType
17 implements TypeValue, Externalizable, AttributePredicate
18 {
19 Symbol qname;
20
21 public static AttributeType make (String  namespaceURI, String localName)
22 {
23 Symbol qname;
24 if (namespaceURI != null)
25 qname = Symbol.make(namespaceURI, localName);
26 else if (localName == ElementType.MATCH_ANY_LOCALNAME)
27 qname = ElementType.MATCH_ANY_QNAME;
28 else
29 qname = new Symbol(null, localName);
30 return new AttributeType(qname);
31 }
32
33 public static AttributeType make (Symbol qname)
34 {
35 return new AttributeType(qname);
36 }
37
38 public AttributeType(Symbol qname)
39 {
40 this(null, qname);
41 }
42
43 public AttributeType(String name, Symbol qname)
44 {
45 super(name != null && name.length() > 0 ? name
46 : "ATTRIBUTE "+qname+" (*)");
47 this.qname = qname;
48 }
49
50 public Type getImplementationType()
51 {
52 return ClassType.make("gnu.kawa.xml.KAttr");
53 }
54
55 public final String getNamespaceURI () { return qname.getNamespaceURI(); }
56 public final String getLocalName () { return qname.getLocalName(); }
57
58 public void emitCoerceFromObject (CodeAttr code)
59 {
60 code.emitPushString(qname.getNamespaceURI());
61 code.emitPushString(qname.getLocalName());
62 code.emitInvokeStatic(coerceMethod);
63 }
64
65 public Object coerceFromObject (Object obj)
66 {
67 return coerce(obj, qname.getNamespaceURI(), qname.getLocalName());
68 }
69
70 public boolean isInstancePos (AbstractSequence seq, int ipos)
71 {
72 int kind = seq.getNextKind(ipos);
73 if (kind == Sequence.ATTRIBUTE_VALUE)
74 return isInstance(seq, ipos, seq.getNextTypeObject(ipos));
75 if (kind == Sequence.OBJECT_VALUE)
76 return isInstance(seq.getPosNext(ipos));
77 return false;
78 }
79
80 public boolean isInstance(AbstractSequence seq, int ipos, Object attrType)
81 {
82 String namespaceURI = qname.getNamespaceURI();
83 String localName = qname.getLocalName();
84 String curNamespaceURI;
85 String curLocalName;
86 if (attrType instanceof Symbol)
87 {
88 Symbol qname = (Symbol) attrType;
89 curNamespaceURI = qname.getNamespaceURI();
90 curLocalName = qname.getLocalName();
91 }
92
93
101 else
102 {
103 curNamespaceURI = "";
104 curLocalName = attrType.toString().intern(); }
106 if (localName != null && localName.length() == 0)
107 localName = null;
108 return ((localName == curLocalName || localName == null)
109 && (namespaceURI == curNamespaceURI || namespaceURI == null));
110 }
111
112 public boolean isInstance (Object obj)
113 {
114 return coerceOrNull(obj, qname.getNamespaceURI(),qname.getLocalName())
115 != null;
116 }
117
118 public static SeqPosition coerceOrNull (Object obj,
119 String namespaceURI, String localName)
120 {
121 SeqPosition pos = NodeType.coerceOrNull(obj, ATTRIBUTE_OK);
122 if (pos == null)
123 return null;
124 if (localName != null && localName.length() == 0)
125 localName = null;
126 Object curName = pos.getNextTypeObject();
127 String curNamespaceURI;
128 String curLocalName;
129 if (curName instanceof Symbol)
130 {
131 Symbol qname = (Symbol) curName;
132 curNamespaceURI = qname.getNamespaceURI();
133 curLocalName = qname.getLocalName();
134 }
135
136
144 else
145 {
146 curNamespaceURI = "";
147 curLocalName = curName.toString().intern(); }
149 if ((localName == curLocalName || localName == null)
150 && (namespaceURI == curNamespaceURI || namespaceURI == null))
151 return pos;
152 return null;
153 }
154
155 public static SeqPosition coerce (Object obj,
156 String namespaceURI, String localName)
157 {
158 SeqPosition pos = coerceOrNull(obj, namespaceURI, localName);
159 if (pos == null)
160 throw new ClassCastException ();
161 return pos;
162 }
163
164 protected void emitCoerceOrNullMethod(Variable incoming, Compilation comp)
165 {
166 CodeAttr code = comp.getCode();
167 if (incoming != null)
168 code.emitLoad(incoming);
169 code.emitPushString(qname.getNamespaceURI());
170 code.emitPushString(qname.getLocalName());
171 code.emitInvokeStatic(coerceOrNullMethod);
172 }
173
174 public static final ClassType typeAttributeType
175 = ClassType.make("gnu.kawa.xml.AttributeType");
176 static final Method coerceMethod
177 = typeAttributeType.getDeclaredMethod("coerce", 3);
178 static final Method coerceOrNullMethod
179 = typeAttributeType.getDeclaredMethod("coerceOrNull", 3);
180
181 public void writeExternal(ObjectOutput out) throws IOException
182 {
183 String name = getName();
184 out.writeUTF(name == null ? "" : name);
185 out.writeObject(qname);
186 }
187
188 public void readExternal(ObjectInput in)
189 throws IOException, ClassNotFoundException
190 {
191 String name = in.readUTF();
192 if (name.length() > 0)
193 setName(name);
194 qname = (Symbol) in.readObject();
195 }
196
197 public String toString ()
198 {
199 return "AttributeType " + qname;
200 }
201 }
202 |
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