Fixed javadoc, fixed cables giving the details of their provider instead of themselves

src/main/java/arzumify/polyenergy/api/EnergyProvider.java

@@ -9,10 +9,11 @@ public interface EnergyProvider {
     /**
      * When called by a receiver, attempts to remove energy from the provider.
      * Do not attempt to extract energy until {@link EnergyReceiver#ready(EnergyProvider)} is called by the receiver.
+     * The receiver may attempt to remove itself from the provider if it is no longer able to receive energy; this will be done via unready.
      *
      * @param amount   The target amount of energy to extract
      * @param receiver The receiver that is attempting to extract energy
-     * @return The amount of energy actually extracted. If zero, the receiver will not attempt to extract energy until {@link EnergyReceiver#ready(EnergyProvider)} is called.
+     * @return The amount of energy actually extracted.
      */
     long extract(long amount, EnergyReceiver receiver);
 

src/main/java/arzumify/polyenergy/util/SimpleCable.java

@@ -43,18 +43,16 @@ public class SimpleCable extends BlockEntity implements EnergyProvider, EnergyRe
 
     @Override
     public long extract(long amount, EnergyReceiver receiver) {
+        System.out.println("Extracting " + amount + " energy");
         long extracted = Math.min(Math.min(outputRate, amount), energy);
         energy -= extracted;
-        if (energy == 0) {
-            CoordinateMatchMaker.removeProvider(providerDetails);
-        }
         return extracted;
     }
 
     @Override
     public void exists(EnergyReceiver receiver, ArrayList<Vec3i> pointsOfPresence) {
         if (currentProvider != null) {
-            receiver.ready(currentProvider);
+            receiver.ready(this);
         }
     }
 

src/test/java/SimpleCodeOnlyCable.java

@@ -44,9 +44,6 @@ public class SimpleCodeOnlyCable implements EnergyProvider, EnergyReceiver, Serv
         long extracted = Math.min(Math.min(outputRate, amount), energy);
         energy -= extracted;
         System.out.println(name + " extracted " + extracted + " energy");
-        if (energy == 0) {
-            CoordinateMatchMaker.removeProvider(providerDetails);
-        }
         return extracted;
     }
 
@@ -54,7 +51,7 @@ public class SimpleCodeOnlyCable implements EnergyProvider, EnergyReceiver, Serv
     public void exists(EnergyReceiver receiver, ArrayList<Vec3i> pointsOfPresence) {
         System.out.println(name + " found other receiver");
         if (currentProvider != null) {
-            receiver.ready(currentProvider);
+            receiver.ready(this);
         }
     }