git.gag.com Git - debian/openrocket/blob - core/src/de/congrace/exp4j/VariableSet.java

   1 package de.congrace.exp4j;
   2
   3 import java.util.HashSet;
   4
   5 public class VariableSet extends HashSet<Variable> {
   6
   7         /**
   8          *
   9          */
  10         private static final long serialVersionUID = -4212803364398351279L;
  11
  12         public boolean add(Variable v){
  13                 Variable previous = getVariableNamed(v.getName());
  14                 if ( previous != null ){
  15                         this.remove( previous );
  16                 }
  17
  18                 return super.add(v);
  19         }
  20
  21         public Variable getVariableNamed(String name){
  22                 for (Variable var : this){
  23                         if (var.getName().equals(name) ){
  24                                 return var;
  25                         }
  26                 }
  27                 return null;
  28         }
  29
  30         public String[] getVariableNames(){
  31                 if (this.size() == 0){
  32                         return null;
  33                 }
  34                 String names[] = new String[this.size()];
  35                 int i = 0;
  36                 for (Variable var : this){
  37                         names[i] = var.getName();
  38                         i++;
  39                 }
  40                 return names;
  41         }
  42 }