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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.*;
11
12 public class ElementType extends NodeType
13 implements TypeValue, Externalizable, GroupPredicate
14 {
15 public static final String  MATCH_ANY_LOCALNAME = "";
16 public static final Symbol MATCH_ANY_QNAME
17 = new Symbol(null, MATCH_ANY_LOCALNAME);
18
19 Symbol qname;
20
21 public static final ElementType anyElement = make(null, null);
22
23
27 public static ElementType make (String namespaceURI, String localName)
28 {
29 Symbol qname;
30 if (namespaceURI != null)
31 qname = Symbol.make(namespaceURI, localName);
32 else if (localName == MATCH_ANY_LOCALNAME)
33 qname = MATCH_ANY_QNAME;
34 else
35 qname = new Symbol(null, localName);
36 return new ElementType(qname);
37 }
38
39 public static ElementType make (Symbol qname)
40 {
41 return new ElementType(qname);
42 }
43
44 public ElementType(Symbol qname)
45 {
46 this(null, qname);
47 }
48
49 public ElementType(String name, Symbol qname)
50 {
51 super(name != null && name.length() > 0 ? name
52 : "ELEMENT "+qname+" (*)");
53 this.qname = qname;
54 }
55
56 public Type getImplementationType()
57 {
58 return ClassType.make("gnu.kawa.xml.KElement");
59 }
60
61 public final String getNamespaceURI () { return qname.getNamespaceURI(); }
62 public final String getLocalName () { return qname.getLocalName(); }
63
64 public void emitCoerceFromObject (CodeAttr code)
65 {
66 code.emitPushString(qname.getNamespaceURI());
67 code.emitPushString(qname.getLocalName());
68 code.emitInvokeStatic(coerceMethod);
69 }
70
71 public Object coerceFromObject (Object obj)
72 {
73 return coerce(obj, qname.getNamespaceURI(), qname.getLocalName());
74 }
75
76 public boolean isInstancePos (AbstractSequence seq, int ipos)
77 {
78 int kind = seq.getNextKind(ipos);
79 if (kind == Sequence.GROUP_VALUE)
80 return isInstance(seq, ipos, seq.getNextTypeObject(ipos));
81 if (kind == Sequence.OBJECT_VALUE)
82 return isInstance(seq.getPosNext(ipos));
83 return false;
84 }
85
86 public boolean isInstance(AbstractSequence seq, int ipos, Object groupType)
87 {
88 String namespaceURI = qname.getNamespaceURI();
89 String localName = qname.getLocalName();
90 String curNamespaceURI;
91 String curLocalName;
92 if (groupType instanceof Symbol)
93 {
94 Symbol qname = (Symbol) groupType;
95 curNamespaceURI = qname.getNamespaceURI();
96 curLocalName = qname.getLocalName();
97 }
98
99
107 else
108 {
109 curNamespaceURI = "";
110 curLocalName = groupType.toString().intern(); }
112 if (localName != null && localName.length() == 0)
113 localName = null;
114 return ((localName == curLocalName || localName == null)
115 && (namespaceURI == curNamespaceURI || namespaceURI == null));
116 }
117
118 public boolean isInstance (Object obj)
119 {
120 return coerceOrNull(obj, qname.getNamespaceURI(),qname.getLocalName())
121 != null;
122 }
123
124 public static KElement coerceOrNull (Object obj,
125 String namespaceURI, String localName)
126 {
127 KElement pos = (KElement) NodeType.coerceOrNull(obj, GROUP_OK);
128 if (pos == null)
129 return null;
130 if (localName != null && localName.length() == 0)
131 localName = null;
132 Object curName = pos.getNextTypeObject();
135 String curNamespaceURI;
136 String curLocalName;
137 if (curName instanceof Symbol)
138 {
139 Symbol qname = (Symbol) curName;
140 curNamespaceURI = qname.getNamespaceURI();
141 curLocalName = qname.getLocalName();
142 }
143
144
152 else
153 {
154 curNamespaceURI = "";
155 curLocalName = curName.toString().intern(); }
157 if ((localName == curLocalName || localName == null)
158 && (namespaceURI == curNamespaceURI || namespaceURI == null))
159 return pos;
160 return null;
161 }
162
163 public static KElement coerce (Object obj,
164 String namespaceURI, String localName)
165 {
166 KElement pos = coerceOrNull(obj, namespaceURI, localName);
167 if (pos == null)
168 throw new ClassCastException ();
169 return pos;
170 }
171
172 protected void emitCoerceOrNullMethod(Variable incoming, Compilation comp)
173 {
174 CodeAttr code = comp.getCode();
175 if (incoming != null)
176 code.emitLoad(incoming);
177 code.emitPushString(qname.getNamespaceURI());
178 code.emitPushString(qname.getLocalName());
179 code.emitInvokeStatic(coerceOrNullMethod);
180 }
181
182 NamespaceBinding namespaceNodes;
183 public NamespaceBinding getNamespaceNodes ()
184 {
185 return namespaceNodes;
186 }
187
188 public void setNamespaceNodes (NamespaceBinding bindings)
189 {
190 namespaceNodes = bindings;
191 }
192
193 public Procedure getConstructor ()
194 {
195 gnu.kawa.xml.MakeElement element = new gnu.kawa.xml.MakeElement();
196 element.tag = qname;
197 element.setHandlingKeywordParameters(true);
198 if (namespaceNodes != null)
199 element.setNamespaceNodes(namespaceNodes);
200 return element;
201 }
202
203 public static final ClassType typeElementType
204 = ClassType.make("gnu.kawa.xml.ElementType");
205 static final Method coerceMethod
206 = typeElementType.getDeclaredMethod("coerce", 3);
207 static final Method coerceOrNullMethod
208 = typeElementType.getDeclaredMethod("coerceOrNull", 3);
209
210 public void writeExternal(ObjectOutput out) throws IOException
211 {
212 String name = getName();
213 out.writeUTF(name == null ? "" : name);
214 out.writeObject(qname);
215 }
216
217 public void readExternal(ObjectInput in)
218 throws IOException, ClassNotFoundException
219 {
220 String name = in.readUTF();
221 if (name.length() > 0)
222 setName(name);
223 qname = (Symbol) in.readObject();
224 }
225
226 public String toString ()
227 {
228 return "ElementType " + qname;
229 }
230 }
231 |
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