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1 package nabble.naml.compiler;
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2
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3 import java.util.Collections;
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4 import java.util.List;
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5 import java.util.ArrayList;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8
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9
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10 final class MacroNamespace implements GenericNamespace {
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11 private final Macro macro;
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12 private final List<String> names = new ArrayList<String>();
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13
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14 MacroNamespace(Macro macro,StackTrace stackTrace,Map<String,List<Macro>> macros)
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15 throws CompileException
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16 {
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17 this.macro = macro;
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18 while(true) {
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19 names.add(macro.name);
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20 if( macro.extendsNs == null )
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21 break;
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22 stackTrace.push( new StackTraceElement(macro) );
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23 try {
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24 List<Macro> candidates = macros.get(macro.extendsNs);
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25 if( candidates==null )
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26 throw new CompileException(stackTrace,"'extend' namespace not found: "+macro.extendsNs);
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27 for( Iterator<Macro> iter = candidates.iterator(); iter.hasNext(); ) {
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28 Macro m = iter.next();
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29 if( m.type != Macro.Type.NAMESPACE )
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30 iter.remove();
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31 }
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32 if( candidates.size() == 0 )
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33 throw new CompileException(stackTrace,"'extend' namespace not found: "+macro.extendsNs);
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34 if( candidates.size() > 1 )
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35 throw new CompileException(stackTrace,"duplicate 'extend' namespaces: "+candidates);
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36 macro = candidates.get(0);
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37 } finally {
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38 stackTrace.pop();
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39 }
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40 }
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41 }
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42
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43 @Override public boolean isGlobal() {
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44 return true;
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45 }
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46
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47 @Override public boolean isTransparent() {
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48 return false;
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49 }
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50
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51 @Override public List<String> names() {
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52 return names;
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53 }
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54
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55 @Override public String getId() {
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56 return macro.getId();
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57 }
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58
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59 @Override public boolean equals(Object obj) {
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60 if( !(obj instanceof MacroNamespace) )
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61 return false;
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62 MacroNamespace ns = (MacroNamespace)obj;
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63 return names.equals(ns.names);
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64 }
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65
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66 @Override public int hashCode() {
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67 return names.hashCode();
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68 }
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69
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70 @Override public String toString() {
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71 return names.get(0);
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72 }
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73 }
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