tools/lexer/jflex-1.4/src/java_cup/runtime/ComplexSymbolFactory.java

   1 package java_cup.runtime;
   2
   3 /**
   4  * Default Implementation for SymbolFactory, creates
   5  * plain old Symbols
   6  *
   7  * @version last updated 27-03-2006
   8  * @author Michael Petter
   9  */
  10
  11 /* *************************************************
  12   class DefaultSymbolFactory
  13
  14   interface for creating new symbols
  15  ***************************************************/
  16 public class ComplexSymbolFactory implements SymbolFactory{
  17     public static class Location {
  18         private String unit="unknown";
  19         private int line, column;
  20         public Location(String unit, int line, int column){
  21             this.unit=unit;
  22             this.line=line;
  23             this.column=column;
  24         }
  25         public Location(int line, int column){
  26             this.line=line;
  27             this.column=column;
  28         }
  29         public String toString(){
  30             return unit+":"+line+"/"+column;
  31         }
  32         public int getColumn(){
  33             return column;
  34         }
  35         public int getLine(){
  36             return line;
  37         }
  38         public String getUnit(){
  39             return unit;
  40         }
  41     }
  42     /**
  43      * ComplexSymbol with detailed Location Informations and a Name
  44      */
  45     public static class ComplexSymbol extends Symbol {
  46         protected String name;
  47         protected Location xleft,xright;
  48         public ComplexSymbol(String name, int id) {
  49             super(id);
  50             this.name=name;
  51         }
  52         public ComplexSymbol(String name, int id, Object value) {
  53             super(id,value);
  54             this.name=name;
  55         }
  56         public String toString(){
  57             if (xleft==null || xright==null) return "Symbol: "+name;
  58             return "Symbol: "+name+" ("+xleft+" - "+xright+")";
  59         }
  60         public ComplexSymbol(String name, int id, int state) {
  61             super(id,state);
  62             this.name=name;
  63         }
  64         public ComplexSymbol(String name, int id, Symbol left, Symbol right) {
  65             super(id,left,right);
  66             this.name=name;
  67             if (left!=null)  this.xleft = ((ComplexSymbol)left).xleft;
  68             if (right!=null) this.xright= ((ComplexSymbol)right).xright;
  69         }
  70         public ComplexSymbol(String name, int id, Location left, Location right) {
  71             super(id);
  72             this.name=name;
  73             this.xleft=left;
  74             this.xright=right;
  75         }
  76         public ComplexSymbol(String name, int id, Symbol left, Symbol right, Object value) {
  77             super(id,value);
  78             this.name=name;
  79             if (left!=null)  this.xleft = ((ComplexSymbol)left).xleft;
  80             if (right!=null) this.xright= ((ComplexSymbol)right).xright;
  81         }
  82         public ComplexSymbol(String name, int id, Location left, Location right, Object value) {
  83             super(id,value);
  84             this.name=name;
  85             this.xleft=left;
  86             this.xright=right;
  87         }
  88         public Location getLeft(){
  89             return xleft;
  90         }
  91         public Location getRight(){
  92             return xright;
  93         }
  94     }
  95
  96
  97     // Factory methods
  98     public Symbol newSymbol(String name, int id, Location left, Location right, Object value){
  99         return new ComplexSymbol(name,id,left,right,value);
 100     }
 101     public Symbol newSymbol(String name, int id, Location left, Location right){
 102         return new ComplexSymbol(name,id,left,right);
 103     }
 104     public Symbol newSymbol(String name, int id, Symbol left, Symbol right, Object value){
 105         return new ComplexSymbol(name,id,left,right,value);
 106     }
 107     public Symbol newSymbol(String name, int id, Symbol left, Symbol right){
 108         return new ComplexSymbol(name,id,left,right);
 109     }
 110     public Symbol newSymbol(String name, int id){
 111         return new ComplexSymbol(name,id);
 112     }
 113     public Symbol newSymbol(String name, int id, Object value){
 114         return new ComplexSymbol(name,id,value);
 115     }
 116     public Symbol startSymbol(String name, int id, int state){
 117         return new ComplexSymbol(name,id,state);
 118     }
 119 }