Reader and writer always return a dummy cap now.

src/main/java/com/raoulvdberge/refinedstorage/api/network/readerwriter/IReaderWriterChannel.java

@@ -36,5 +36,5 @@ public interface IReaderWriterChannel {
      *
      * @param tag the tag to read from
      */
-    void readFromNBT(NBTTagCompound tag);
+    void readFromNbt(NBTTagCompound tag);
 }

src/main/java/com/raoulvdberge/refinedstorage/api/network/readerwriter/IReaderWriterHandler.java

@@ -53,6 +53,11 @@ public interface IReaderWriterHandler {
      */
     <T> T getCapabilityWriter(IWriter writer, Capability<T> capability);
 
+    /**
+     * @return a dummy capability that does nothing, for use client side
+     */
+    Object getNullCapability();
+
     /**
      * Writes this reader writer handler to NBT.
      *

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/readerwriter/ReaderWriterChannel.java

@@ -54,7 +54,7 @@ public class ReaderWriterChannel implements IReaderWriterChannel {
     }
 
     @Override
-    public void readFromNBT(NBTTagCompound tag) {
+    public void readFromNbt(NBTTagCompound tag) {
         for (IReaderWriterHandler handler : handlers) {
             String id = String.format(NBT_HANDLER, handler.getId());
 

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/readerwriter/ReaderWriterHandlerFluids.java

@@ -22,6 +22,30 @@ import java.util.List;
 public class ReaderWriterHandlerFluids implements IReaderWriterHandler {
     public static final String ID = "fluids";
 
+    private static final IFluidHandler NULL_CAP = new IFluidHandler() {
+        @Override
+        public IFluidTankProperties[] getTankProperties() {
+            return new IFluidTankProperties[0];
+        }
+
+        @Override
+        public int fill(FluidStack resource, boolean doFill) {
+            return 0;
+        }
+
+        @Nullable
+        @Override
+        public FluidStack drain(FluidStack resource, boolean doDrain) {
+            return null;
+        }
+
+        @Nullable
+        @Override
+        public FluidStack drain(int maxDrain, boolean doDrain) {
+            return null;
+        }
+    };
+
     private FluidTank tank;
     private FluidTankReaderWriter tankReader, tankWriter;
 
@@ -73,6 +97,11 @@ public class ReaderWriterHandlerFluids implements IReaderWriterHandler {
         return null;
     }
 
+    @Override
+    public Object getNullCapability() {
+        return NULL_CAP;
+    }
+
     @Override
     public NBTTagCompound writeToNbt(NBTTagCompound tag) {
         tank.writeToNBT(tag);

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/readerwriter/ReaderWriterHandlerItems.java

@@ -23,6 +23,36 @@ import java.util.List;
 public class ReaderWriterHandlerItems implements IReaderWriterHandler {
     public static final String ID = "items";
 
+    private static final IItemHandler NULL_CAP = new IItemHandler() {
+        @Override
+        public int getSlots() {
+            return 0;
+        }
+
+        @Nonnull
+        @Override
+        public ItemStack getStackInSlot(int slot) {
+            return ItemStack.EMPTY;
+        }
+
+        @Nonnull
+        @Override
+        public ItemStack insertItem(int slot, @Nonnull ItemStack stack, boolean simulate) {
+            return stack;
+        }
+
+        @Nonnull
+        @Override
+        public ItemStack extractItem(int slot, int amount, boolean simulate) {
+            return ItemStack.EMPTY;
+        }
+
+        @Override
+        public int getSlotLimit(int slot) {
+            return 0;
+        }
+    };
+
     private ItemStackHandler items;
     private ItemHandlerReaderWriter itemsReader, itemsWriter;
 
@@ -74,6 +104,11 @@ public class ReaderWriterHandlerItems implements IReaderWriterHandler {
         return null;
     }
 
+    @Override
+    public Object getNullCapability() {
+        return NULL_CAP;
+    }
+
     @Override
     public NBTTagCompound writeToNbt(NBTTagCompound tag) {
         StackUtils.writeItems(items, 0, tag);

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/readerwriter/ReaderWriterHandlerRedstone.java

@@ -59,6 +59,11 @@ public class ReaderWriterHandlerRedstone implements IReaderWriterHandler {
         return null;
     }
 
+    @Override
+    public Object getNullCapability() {
+        return null;
+    }
+
     @Override
     public NBTTagCompound writeToNbt(NBTTagCompound tag) {
         return tag;

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/readerwriter/ReaderWriterManager.java

@@ -105,7 +105,7 @@ public class ReaderWriterManager implements IReaderWriterManager {
 
                 IReaderWriterChannel channel = API.instance().createReaderWriterChannel(name, network);
 
-                channel.readFromNBT(channelTag);
+                channel.readFromNbt(channelTag);
 
                 channels.put(name, channel);
             }

src/main/java/com/raoulvdberge/refinedstorage/integration/forgeenergy/ReaderWriterHandlerForgeEnergy.java

@@ -20,6 +20,38 @@ import java.util.List;
 public class ReaderWriterHandlerForgeEnergy implements IReaderWriterHandler {
     public static final String ID = "forgeenergy";
 
+    private static final IEnergyStorage NULL_CAP = new IEnergyStorage() {
+        @Override
+        public int receiveEnergy(int maxReceive, boolean simulate) {
+            return 0;
+        }
+
+        @Override
+        public int extractEnergy(int maxExtract, boolean simulate) {
+            return 0;
+        }
+
+        @Override
+        public int getEnergyStored() {
+            return 0;
+        }
+
+        @Override
+        public int getMaxEnergyStored() {
+            return 0;
+        }
+
+        @Override
+        public boolean canExtract() {
+            return false;
+        }
+
+        @Override
+        public boolean canReceive() {
+            return false;
+        }
+    };
+
     private static final String NBT_ENERGY_STORED = "EnergyStored";
 
     private EnergyStorage storage;
@@ -89,6 +121,11 @@ public class ReaderWriterHandlerForgeEnergy implements IReaderWriterHandler {
         return null;
     }
 
+    @Override
+    public Object getNullCapability() {
+        return NULL_CAP;
+    }
+
     @Override
     public NBTTagCompound writeToNbt(NBTTagCompound tag) {
         tag.setInteger(NBT_ENERGY_STORED, storage.getEnergyStored());

src/main/java/com/raoulvdberge/refinedstorage/tile/TileReader.java

@@ -15,8 +15,6 @@ import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.common.capabilities.Capability;
-import net.minecraftforge.fml.common.FMLCommonHandler;
-import net.minecraftforge.fml.relauncher.Side;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -36,18 +34,6 @@ public class TileReader extends TileNode<NetworkNodeReader> {
         dataManager.addWatchedParameter(CHANNEL);
     }
 
-    private <T> T getDummyCapabilityForClient(IReader reader, Capability<T> capability) {
-        for (IReaderWriterHandlerFactory factory : API.instance().getReaderWriterHandlerRegistry().all()) {
-            T dummy = factory.create(null).getCapabilityReader(reader, capability);
-
-            if (dummy != null) {
-                return dummy;
-            }
-        }
-
-        return null;
-    }
-
     @Override
     public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
         if (super.hasCapability(capability, facing)) {
@@ -60,22 +46,8 @@ public class TileReader extends TileNode<NetworkNodeReader> {
             return false;
         }
 
-        if (reader.getNetwork() == null || !reader.canUpdate()) {
+        for (IReaderWriterHandlerFactory handlerFactory : API.instance().getReaderWriterHandlerRegistry().all()) {
-            if (FMLCommonHandler.instance().getEffectiveSide() == Side.CLIENT) {
+            if (handlerFactory.create(null).hasCapabilityReader(reader, capability)) {
-                return getDummyCapabilityForClient(reader, capability) != null;
-            }
-
-            return false;
-        }
-
-        IReaderWriterChannel channel = reader.getNetwork().getReaderWriterManager().getChannel(reader.getChannel());
-
-        if (channel == null) {
-            return false;
-        }
-
-        for (IReaderWriterHandler handler : channel.getHandlers()) {
-            if (handler.hasCapabilityReader(reader, capability)) {
                 return true;
             }
         }
@@ -94,18 +66,21 @@ public class TileReader extends TileNode<NetworkNodeReader> {
                 return null;
             }
 
-            if (reader.getNetwork() == null || !reader.canUpdate()) {
+            Object dummyCap = null;
-                if (FMLCommonHandler.instance().getEffectiveSide() == Side.CLIENT) {
+            for (IReaderWriterHandlerFactory handlerFactory : API.instance().getReaderWriterHandlerRegistry().all()) {
-                    return getDummyCapabilityForClient(reader, capability);
+                if (handlerFactory.create(null).hasCapabilityReader(reader, capability)) {
+                    dummyCap = handlerFactory.create(null).getNullCapability();
                 }
+            }
 
-                return null;
+            if (reader.getNetwork() == null || !reader.canUpdate()) {
+                return (T) dummyCap;
             }
 
             IReaderWriterChannel channel = reader.getNetwork().getReaderWriterManager().getChannel(reader.getChannel());
 
             if (channel == null) {
-                return null;
+                return (T) dummyCap;
             }
 
             for (IReaderWriterHandler handler : channel.getHandlers()) {

src/main/java/com/raoulvdberge/refinedstorage/tile/TileWriter.java

@@ -11,8 +11,6 @@ import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.common.capabilities.Capability;
-import net.minecraftforge.fml.common.FMLCommonHandler;
-import net.minecraftforge.fml.relauncher.Side;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -24,18 +22,6 @@ public class TileWriter extends TileNode<NetworkNodeWriter> {
         dataManager.addWatchedParameter(CHANNEL);
     }
 
-    private <T> T getDummyCapabilityForClient(IWriter writer, Capability<T> capability) {
-        for (IReaderWriterHandlerFactory factory : API.instance().getReaderWriterHandlerRegistry().all()) {
-            T dummy = factory.create(null).getCapabilityWriter(writer, capability);
-
-            if (dummy != null) {
-                return dummy;
-            }
-        }
-
-        return null;
-    }
-
     @Override
     public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
         if (super.hasCapability(capability, facing)) {
@@ -48,22 +34,8 @@ public class TileWriter extends TileNode<NetworkNodeWriter> {
             return false;
         }
 
-        if (writer.getNetwork() == null || !writer.canUpdate()) {
+        for (IReaderWriterHandlerFactory handlerFactory : API.instance().getReaderWriterHandlerRegistry().all()) {
-            if (FMLCommonHandler.instance().getEffectiveSide() == Side.CLIENT) {
+            if (handlerFactory.create(null).hasCapabilityWriter(writer, capability)) {
-                return getDummyCapabilityForClient(writer, capability) != null;
-            }
-
-            return false;
-        }
-
-        IReaderWriterChannel channel = writer.getNetwork().getReaderWriterManager().getChannel(writer.getChannel());
-
-        if (channel == null) {
-            return false;
-        }
-
-        for (IReaderWriterHandler handler : channel.getHandlers()) {
-            if (handler.hasCapabilityWriter(writer, capability)) {
                 return true;
             }
         }
@@ -82,18 +54,21 @@ public class TileWriter extends TileNode<NetworkNodeWriter> {
                 return null;
             }
 
-            if (writer.getNetwork() == null || !writer.canUpdate()) {
+            Object dummyCap = null;
-                if (FMLCommonHandler.instance().getEffectiveSide() == Side.CLIENT) {
+            for (IReaderWriterHandlerFactory handlerFactory : API.instance().getReaderWriterHandlerRegistry().all()) {
-                    return getDummyCapabilityForClient(writer, capability);
+                if (handlerFactory.create(null).hasCapabilityWriter(writer, capability)) {
+                    dummyCap = handlerFactory.create(null).getNullCapability();
                 }
+            }
 
-                return null;
+            if (writer.getNetwork() == null || !writer.canUpdate()) {
+                return (T) dummyCap;
             }
 
             IReaderWriterChannel channel = writer.getNetwork().getReaderWriterManager().getChannel(writer.getChannel());
 
             if (channel == null) {
-                return null;
+                return (T) dummyCap;
             }
 
             for (IReaderWriterHandler handler : channel.getHandlers()) {