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