+package era.mi.logic.components.gates;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import era.mi.logic.Bit;
+import era.mi.logic.components.BasicComponent;
+import era.mi.logic.wires.WireArray;
+import era.mi.logic.wires.WireArray.WireArrayInput;
+
+public abstract class MultiInputGate extends BasicComponent
+{
+ protected WireArray[] in;
+ protected WireArray out;
+ protected WireArrayInput outI;
+ protected final int length;
+ protected Operation op;
+
+ protected MultiInputGate(int processTime, Operation op, WireArray out, WireArray... in)
+ {
+ super(processTime);
+ this.op = op;
+ length = out.length;
+ this.in = in.clone();
+ if(in.length < 1)
+ throw new IllegalArgumentException(String.format("Cannot create gate with %d wires.", in.length));
+ for(WireArray w : in)
+ {
+ if(w.length != length)
+ throw new IllegalArgumentException("All wires connected to the gate must be of uniform length.");
+ w.addObserver(this);
+ }
+ this.out = out;
+ outI = out.createInput();
+ }
+
+
+ @Override
+ public List<WireArray> getAllInputs()
+ {
+ return Collections.unmodifiableList(Arrays.asList(in));
+ }
+
+ @Override
+ public List<WireArray> getAllOutputs()
+ {
+ return Collections.unmodifiableList(Arrays.asList(out));
+ }
+
+ protected void compute()
+ {
+ Bit[] result = in[0].getValues();
+ for(int i = 1; i < in.length; i++)
+ result = op.execute(result, in[i].getValues());
+ outI.feedSignals(result);
+ }
+
+ protected interface Operation
+ {
+ public Bit[] execute(Bit[] a, Bit[] b);
+ }
+}