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comparison src/nabble/naml/compiler/ScopedInterpreterImpl.java @ 0:7ecd1a4ef557

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 21 Mar 2019 19:15:52 -0600
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-1:000000000000 0:7ecd1a4ef557
1 package nabble.naml.compiler;
2
3 import java.util.Map;
4
5
6 final class ScopedInterpreterImpl<T> extends InterpreterImpl implements ScopedInterpreter<T> {
7 private final Map<String,Chunk> dynamicArgs;
8
9 ScopedInterpreterImpl(CommandSpec cmdSpec,RunState runState,Map<Class,Integer> inStack,Map<String,?> args,Map<String,Chunk> dynamicArgs) {
10 super(cmdSpec,runState,inStack,args);
11 this.dynamicArgs = dynamicArgs;
12 }
13
14 public Object getArg(final T scope,String param) {
15 if( scope == null )
16 throw new TemplateRuntimeException("scope is null");
17 if( !cmdSpec.scopedParameters.contains(param) )
18 throw new RuntimeException("not scoped parameter");
19 Chunk chunk = dynamicArgs.get(param);
20 if( chunk != null ) {
21 return new BlockWrapper(chunk,runState) {
22 void printTo(IPrintWriter out) {
23 int pushed = runState.push(scope);
24 try {
25 super.printTo(out);
26 } finally {
27 runState.pop(pushed);
28 }
29 }
30 };
31 }
32 Object obj = getArg(param);
33 if( obj != null )
34 return obj;
35 if( scope instanceof Primitive )
36 return scope;
37 return runState.saveNamespace(scope);
38 }
39
40 public String getArgString(T scope,String param) {
41 Object val = getArg(scope,param);
42 return val==null ? null : val.toString();
43 }
44
45 }