era.mi/src/era/mi/logic/components/gates/MultiInputGate.java

   1 package era.mi.logic.components.gates;\r
   2 \r
   3 import java.util.Arrays;\r
   4 import java.util.Collections;\r
   5 import java.util.List;\r
   6 \r
   7 import era.mi.logic.Bit;\r
   8 import era.mi.logic.components.BasicComponent;\r
   9 import era.mi.logic.wires.Wire.WireEnd;\r
  10 \r
  11 public abstract class MultiInputGate extends BasicComponent\r
  12 {\r
  13         protected WireEnd[] in;\r
  14         protected WireEnd out;\r
  15         protected final int length;\r
  16         protected Operation op;\r
  17 \r
  18         protected MultiInputGate(int processTime, Operation op, WireEnd out, WireEnd... in)\r
  19         {\r
  20                 super(processTime);\r
  21                 this.op = op;\r
  22                 length = out.length();\r
  23                 this.in = in.clone();\r
  24                 if (in.length < 1)\r
  25                         throw new IllegalArgumentException(String.format("Cannot create gate with %d wires.", in.length));\r
  26                 for (WireEnd w : in)\r
  27                 {\r
  28                         if (w.length() != length)\r
  29                                 throw new IllegalArgumentException("All wires connected to the gate must be of uniform length.");\r
  30                         w.addObserver(this);\r
  31                 }\r
  32                 this.out = out;\r
  33         }\r
  34 \r
  35         @Override\r
  36         public List<WireEnd> getAllInputs()\r
  37         {\r
  38                 return Collections.unmodifiableList(Arrays.asList(in));\r
  39         }\r
  40 \r
  41         @Override\r
  42         public List<WireEnd> getAllOutputs()\r
  43         {\r
  44                 return Collections.unmodifiableList(Arrays.asList(out));\r
  45         }\r
  46 \r
  47         protected void compute()\r
  48         {\r
  49                 Bit[] result = in[0].getValues();\r
  50                 for (int i = 1; i < in.length; i++)\r
  51                         result = op.execute(result, in[i].getValues());\r
  52                 out.feedSignals(result);\r
  53         }\r
  54 \r
  55         protected interface Operation\r
  56         {\r
  57                 public Bit[] execute(Bit[] a, Bit[] b);\r
  58         }\r
  59 }\r