DAAPLib/src/util/queryparser/Token.java

   1 package util.queryparser;
   2
   3 import interfaces.Element;
   4
   5 import java.math.BigInteger;
   6
   7 import daap.DAAPConstants;
   8
   9 public class Token implements Filter {
  10
  11         public final boolean falseify;
  12         public final String property;
  13         public final String value;
  14
  15         public Token(String t) {
  16                 System.out.println("token: " + t);
  17                 String p;
  18
  19                 int i = t.indexOf(':');
  20                 if (i > 0) {
  21                         p = t.substring(0,i);
  22                         value = t.substring(i+1);
  23                 }
  24                 else {
  25                         p = t;
  26                         value = "";
  27                 }
  28
  29                 if (p.charAt(p.length()-1) == '!') {
  30                         falseify = true;
  31                         property = p.substring(0, p.length()-1);
  32                 }
  33                 else {
  34                         falseify = false;
  35                         property = p;
  36                 }
  37         }
  38
  39         public boolean check(Element t) {
  40
  41                 Integer code = DAAPConstants.shortCodes.get(property);
  42
  43                 if (code != null) {
  44
  45                         Object tval = null;
  46                         Object pval = t.getTag(code);
  47
  48                         int ae00 = 0x61650000;
  49                         if ((0xFFFF0000 & code) == ae00) {
  50                                 //TODO we ignore apple codes because mt-daapd doesn't implement them
  51                                 //this should change?
  52                                 return true;
  53                         }
  54                         switch (DAAPConstants.types.get(code)) {
  55                         case 1: tval = Byte.parseByte(value); break;
  56                         case 5: tval = Integer.parseInt(value); break;
  57                         //using big integer ensures unsigned longs are parsed correctly
  58                         case 7: tval = new BigInteger(value).longValue(); break;
  59                         case 9: tval = value; break; //string
  60                         default:
  61                                 throw new IllegalArgumentException("unknown or unimplemented type: "
  62                                                 + DAAPConstants.types.get(code) + " for " + property);
  63                         }
  64
  65                         return (pval != null && tval.equals(pval)) ^ falseify;
  66                 }
  67                 else {
  68                         throw new IllegalArgumentException("unknown property: " + property);
  69                 }
  70         }
  71
  72         public String toString() {
  73                 return "'"+property+(falseify?"!":"")+":"+value+"'";
  74         }
  75 }