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1 package nabble.naml.compiler;
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2
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3 import java.lang.reflect.Method;
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4 import fschmidt.util.java.Interner;
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5 import nabble.naml.dom.Element;
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6
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7
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8 public final class StackTraceElement {
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9
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10 private static final Interner<StackTraceElement> interner = new Interner<StackTraceElement>();
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11
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12 public final Source source;
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13 private final int lineNumber;
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14 private final Element element;
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15 private final String commandName;
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16 private Method method;
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17
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18 StackTraceElement(Source source,int lineNumber) {
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19 this.source = source;
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20 this.lineNumber = lineNumber;
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21 this.element = null;
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22 this.commandName = null;
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23 }
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24
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25 public StackTraceElement(Source source,Element element) {
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26 this(source,element,(String)null);
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27 }
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28
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29 StackTraceElement(Macro macro) {
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30 this(macro.source,macro.element);
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31 }
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32
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33 StackTraceElement(Source source,Element element,String commandName) {
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34 this.source = source;
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35 this.lineNumber = element.lineNumber();
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36 this.element = element;
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37 this.commandName = commandName==null ? null : commandName.intern();
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38 }
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39
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40 StackTraceElement(Source source,Element element,JavaCommand javaCommand) {
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41 this(source,element,javaCommand.name);
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42 setMethod(javaCommand.method);
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43 }
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44
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45 void setMethod(Method method) {
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46 this.method = method;
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47 }
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48
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49 @Override public boolean equals(Object obj) {
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50 if( !(obj instanceof StackTraceElement) )
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51 return false;
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52 StackTraceElement ste = (StackTraceElement)obj;
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53 return ste.source == source
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54 && ste.lineNumber == lineNumber
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55 && ste.element == element
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56 && ste.commandName == commandName
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57 ;
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58 }
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59
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60 @Override public int hashCode() {
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61 int hash = source.id.hashCode();
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62 hash = 31*hash + lineNumber;
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63 if( element != null )
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64 hash = 31*hash + element.hashCode();
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65 if( commandName != null )
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66 hash = 31*hash + commandName.hashCode();
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67 return hash;
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68 }
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69
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70 StackTraceElement intern() {
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71 return interner.intern(this);
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72 }
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73
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74 public String toString() {
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75 if( element == null )
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76 return source + ":" + (lineNumber+1);
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77 StringBuilder sb = new StringBuilder();
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78 if( commandName != null )
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79 sb.append( commandName );
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80 sb
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81 .append( "(" )
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82 .append( source )
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83 .append( ":" )
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84 .append( lineNumber+1 )
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85 .append( ") - " )
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86 .append( element.openingTag() )
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87 ;
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88 if( method != null )
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89 sb.append( " - " ).append( method );
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90 return sb.toString();
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91 }
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92
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93 String commandName() {
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94 return commandName;
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95 }
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96 }
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