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1
4 package gnu.kawa.xml;
5 import gnu.mapping.*;
6 import gnu.mapping.Location; import gnu.lists.*;
8 import gnu.expr.*;
9 import gnu.bytecode.*;
10
11 public class DocumentConstructor extends NodeConstructor
12 {
13 public static final DocumentConstructor documentConstructor
14 = new DocumentConstructor();
15
16 public void apply (CallContext ctx)
17 {
18 Consumer saved = ctx.consumer;
19 Consumer out = pushNodeContext(ctx);
20 try
21 {
22 Object  endMarker = Location.UNBOUND;
23 out.beginDocument();
24 for (;;)
25 {
26 Object arg = ctx.getNextArg(endMarker);
27 if (arg == endMarker)
28 break;
29 if (arg instanceof Consumable)
30 ((Consumable) arg).consume(out);
31 else
32 out.writeObject(arg);
33 }
34 out.endDocument();
35 }
36 finally
37 {
38 popNodeContext(saved, ctx);
39 }
40 }
41
42 public void compileToNode (ApplyExp exp, Compilation comp,
43 ConsumerTarget target)
44 {
45 Variable consumer = target.getConsumerVariable();
46 Expression[] args = exp.getArgs();
47 int nargs = args.length;
48 CodeAttr code = comp.getCode();
49 code.emitLoad(consumer);
50 code.emitInvokeInterface(beginDocumentMethod);
51 for (int i = 0; i < nargs; i++)
52 compileChild(args[i], comp, target);
53 code.emitLoad(consumer);
54 code.emitInvokeInterface(endDocumentMethod);
55 }
56
57 static final Method beginDocumentMethod
58 = Compilation.typeConsumer.getDeclaredMethod("beginDocument", 0);
59 static final Method endDocumentMethod
60 = Compilation.typeConsumer.getDeclaredMethod("endDocument", 0);
61
62 }
63 |
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