Mark as nullable and add more null checks

Author: ALongStringOfNumbers

src/main/java/gregtech/api/pipenet/block/BlockPipe.java

@@ -564,9 +564,9 @@ public BlockFaceShape getBlockFaceShape(@NotNull IBlockAccess worldIn, @NotNull
     }
 
     @Override
-    public boolean recolorBlock(World world, @NotNull BlockPos pos, @NotNull EnumFacing side,
+    public boolean recolorBlock(@NotNull World world, @NotNull BlockPos pos, @NotNull EnumFacing side,
                                 @NotNull EnumDyeColor color) {
-        IPipeTile<PipeType, NodeDataType> tileEntityPipe = (IPipeTile<PipeType, NodeDataType>) world.getTileEntity(pos);
+        IPipeTile<PipeType, NodeDataType> tileEntityPipe = getPipeTileEntity(world, pos);
         if (tileEntityPipe != null && tileEntityPipe.getPipeType() != null &&
                 tileEntityPipe.getPipeType().isPaintable() &&
                 tileEntityPipe.getPaintingColor() != color.colorValue) {
@@ -588,6 +588,7 @@ public IPipeTile<PipeType, NodeDataType> getPipeTileEntity(IBlockAccess world, B
         return getPipeTileEntity(tileEntityAtPos);
     }
 
+    @Nullable
     public IPipeTile<PipeType, NodeDataType> getPipeTileEntity(TileEntity tileEntityAtPos) {
         if (tileEntityAtPos instanceof IPipeTile &&
                 isThisPipeBlock(((IPipeTile<PipeType, NodeDataType>) tileEntityAtPos).getPipeBlock())) {

src/main/java/gregtech/common/pipelike/cable/BlockCable.java

@@ -131,7 +131,9 @@ public int getLightValue(@NotNull IBlockState state, IBlockAccess world, @NotNul
     @Override
     public void breakBlock(@NotNull World worldIn, @NotNull BlockPos pos, @NotNull IBlockState state) {
         if (worldIn.isRemote) {
-            TileEntityCable cable = (TileEntityCable) getPipeTileEntity(worldIn, pos);
+            IPipeTile<Insulation, WireProperties> pipeTile = getPipeTileEntity(worldIn, pos);
+            if (pipeTile == null) return;
+            TileEntityCable cable = (TileEntityCable) pipeTile;
             cable.killParticle();
         }
         super.breakBlock(worldIn, pos, state);
@@ -168,8 +170,8 @@ public void onEntityCollision(World worldIn, @NotNull BlockPos pos, @NotNull IBl
         if (pipeTile == null) return;
         Insulation insulation = pipeTile.getPipeType();
         if (insulation.insulationLevel == -1 && entityIn instanceof EntityLivingBase entityLiving) {
-            TileEntityCable cable = (TileEntityCable) getPipeTileEntity(worldIn, pos);
-            if (cable != null && cable.getFrameMaterial() == null && cable.getNodeData().getLossPerBlock() > 0) {
+            TileEntityCable cable = (TileEntityCable) pipeTile;
+            if (cable.getFrameMaterial() == null && cable.getNodeData().getLossPerBlock() > 0) {
                 long voltage = cable.getCurrentMaxVoltage();
                 double amperage = cable.getAverageAmperage();
                 if (voltage > 0L && amperage > 0L) {