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

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