Remove the final stage committer from the MultiStageReorder extent, as it caused issues and no longer appears to be entirely necessary.

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/ItemUseParser.java

@@ -35,7 +35,7 @@ import com.sk89q.worldedit.world.World;
 
 public class ItemUseParser extends SimpleCommand<Contextual<RegionFunction>> {
 
-    private final ItemParser itemParser = addParameter(new ItemParser("item", "minecraft:dye:15"));
+    private final ItemParser itemParser = addParameter(new ItemParser("item", "minecraft:bone_meal"));
 
     @Override
     public Contextual<RegionFunction> call(CommandArgs args, CommandLocals locals) throws CommandException {

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/NumberParser.java

@@ -62,7 +62,7 @@ public class NumberParser implements CommandExecutor<Number> {
     @Override
     public List<String> getSuggestions(CommandArgs args, CommandLocals locals) throws MissingArgumentException {
         String value = args.next();
-        return value.isEmpty() && defaultSuggestion != null ? Lists.newArrayList(defaultSuggestion) : Collections.<String>emptyList();
+        return value.isEmpty() && defaultSuggestion != null ? Lists.newArrayList(defaultSuggestion) : Collections.emptyList();
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/StringParser.java

@@ -57,7 +57,7 @@ public class StringParser implements CommandExecutor<String> {
     @Override
     public List<String> getSuggestions(CommandArgs args, CommandLocals locals) throws MissingArgumentException {
         String value = args.next();
-        return value.isEmpty() && defaultSuggestion != null ? Lists.newArrayList(defaultSuggestion) : Collections.<String>emptyList();
+        return value.isEmpty() && defaultSuggestion != null ? Lists.newArrayList(defaultSuggestion) : Collections.emptyList();
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/extent/reorder/MultiStageReorder.java

@@ -24,11 +24,8 @@ import com.sk89q.worldedit.extent.AbstractDelegateExtent;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.operation.OperationQueue;
-import com.sk89q.worldedit.function.operation.RunContext;
 import com.sk89q.worldedit.function.operation.SetLocatedBlocks;
 import com.sk89q.worldedit.math.BlockVector3;
-import com.sk89q.worldedit.registry.state.Property;
-import com.sk89q.worldedit.util.LocatedBlock;
 import com.sk89q.worldedit.util.collection.LocatedBlockList;
 import com.sk89q.worldedit.world.block.BlockCategories;
 import com.sk89q.worldedit.world.block.BlockState;
@@ -37,20 +34,16 @@ import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.block.BlockTypes;
 
 import java.util.ArrayList;
-import java.util.Deque;
 import java.util.HashMap;
-import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 /**
  * Re-orders blocks into several stages.
  */
 public class MultiStageReorder extends AbstractDelegateExtent implements ReorderingExtent {
 
-    private static Map<BlockType, PlacementPriority> priorityMap = new HashMap<>();
+    private static final Map<BlockType, PlacementPriority> priorityMap = new HashMap<>();
 
     static {
         // Late
@@ -129,6 +122,7 @@ public class MultiStageReorder extends AbstractDelegateExtent implements Reorder
         priorityMap.put(BlockTypes.OAK_TRAPDOOR, PlacementPriority.LAST);
         priorityMap.put(BlockTypes.SPRUCE_TRAPDOOR, PlacementPriority.LAST);
         priorityMap.put(BlockTypes.DAYLIGHT_DETECTOR, PlacementPriority.LAST);
+        priorityMap.put(BlockTypes.CAKE, PlacementPriority.LAST);
 
         // Final
         BlockCategories.DOORS.getAll().forEach(type -> priorityMap.put(type, PlacementPriority.FINAL));
@@ -137,7 +131,6 @@ public class MultiStageReorder extends AbstractDelegateExtent implements Reorder
         priorityMap.put(BlockTypes.WALL_SIGN, PlacementPriority.FINAL);
         priorityMap.put(BlockTypes.CACTUS, PlacementPriority.FINAL);
         priorityMap.put(BlockTypes.SUGAR_CANE, PlacementPriority.FINAL);
-        priorityMap.put(BlockTypes.CAKE, PlacementPriority.FINAL);
         priorityMap.put(BlockTypes.PISTON_HEAD, PlacementPriority.FINAL);
         priorityMap.put(BlockTypes.MOVING_PISTON, PlacementPriority.FINAL);
     }
@@ -253,97 +246,9 @@ public class MultiStageReorder extends AbstractDelegateExtent implements Reorder
         }
         List<Operation> operations = new ArrayList<>();
         for (PlacementPriority priority : PlacementPriority.values()) {
-            if (priority != PlacementPriority.FINAL) {
             operations.add(new SetLocatedBlocks(getExtent(), stages.get(priority)));
         }
-        }
 
-        operations.add(new FinalStageCommitter());
         return new OperationQueue(operations);
     }
-
-    private class FinalStageCommitter implements Operation {
-        private Extent extent = getExtent();
-
-        private final Set<BlockVector3> blocks = new HashSet<>();
-        private final Map<BlockVector3, BlockStateHolder> blockTypes = new HashMap<>();
-
-        public FinalStageCommitter() {
-            for (LocatedBlock entry : stages.get(PlacementPriority.FINAL)) {
-                final BlockVector3 pt = entry.getLocation();
-                blocks.add(pt);
-                blockTypes.put(pt, entry.getBlock());
-            }
-        }
-
-        @Override
-        public Operation resume(RunContext run) throws WorldEditException {
-            while (!blocks.isEmpty()) {
-                BlockVector3 current = blocks.iterator().next();
-
-                final Deque<BlockVector3> walked = new LinkedList<>();
-
-                while (true) {
-                    walked.addFirst(current);
-
-                    assert (blockTypes.containsKey(current));
-
-                    final BlockStateHolder blockStateHolder = blockTypes.get(current);
-
-                    if (BlockCategories.DOORS.contains(blockStateHolder.getBlockType())) {
-                        Property<Object> halfProperty = blockStateHolder.getBlockType().getProperty("half");
-                        if (blockStateHolder.getState(halfProperty).equals("lower")) {
-                            // Deal with lower door halves being attached to the floor AND the upper half
-                            BlockVector3 upperBlock = current.add(0, 1, 0);
-                            if (blocks.contains(upperBlock) && !walked.contains(upperBlock)) {
-                                walked.addFirst(upperBlock);
-                            }
-                        }
-                    } else if (BlockCategories.RAILS.contains(blockStateHolder.getBlockType())) {
-                        BlockVector3 lowerBlock = current.add(0, -1, 0);
-                        if (blocks.contains(lowerBlock) && !walked.contains(lowerBlock)) {
-                            walked.addFirst(lowerBlock);
-                        }
-                    }
-
-                    if (!blockStateHolder.getBlockType().getMaterial().isFragileWhenPushed()) {
-                        // Block is not attached to anything => we can place it
-                        break;
-                    }
-
-//                    current = current.add(attachment.vector()).toBlockVector();
-//
-//                    if (!blocks.contains(current)) {
-//                        // We ran outside the remaining set => assume we can place blocks on this
-//                        break;
-//                    }
-//
-                    if (walked.contains(current)) {
-                        // Cycle detected => This will most likely go wrong, but there's nothing we can do about it.
-                        break;
-                    }
-                }
-
-                for (BlockVector3 pt : walked) {
-                    extent.setBlock(pt, blockTypes.get(pt));
-                    blocks.remove(pt);
-                }
-            }
-
-            for (LocatedBlockList stage : stages.values()) {
-                stage.clear();
-            }
-            return null;
-        }
-
-        @Override
-        public void cancel() {
-        }
-
-        @Override
-        public void addStatusMessages(List<String> messages) {
-        }
-
-    }
-
 }

worldedit-core/src/test/java/com/sk89q/worldedit/extent/transform/BlockTransformExtentTest.java

@@ -0,0 +1,69 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.extent.transform;
+
+import static org.junit.Assert.assertEquals;
+
+import com.sk89q.worldedit.math.transform.AffineTransform;
+import com.sk89q.worldedit.math.transform.Transform;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockType;
+import com.sk89q.worldedit.world.block.BlockTypes;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Ignore("A platform is currently required to get properties, preventing this test.")
+public class BlockTransformExtentTest {
+
+    private static final Transform ROTATE_90 = new AffineTransform().rotateY(-90);
+    private static final Transform ROTATE_NEG_90 = new AffineTransform().rotateY(90);
+    private final Set<BlockType> ignored = new HashSet<>();
+
+    @Before
+    public void setUp() throws Exception {
+        BlockTypes.register(new BlockType("worldedit:test"));
+    }
+
+    @Test
+    public void testTransform() throws Exception {
+        for (BlockType type : BlockType.REGISTRY.values()) {
+            if (ignored.contains(type)) {
+                continue;
+            }
+
+            BlockState base = type.getDefaultState();
+            BlockState rotated = base;
+
+            for (int i = 1; i < 4; i++) {
+                rotated = BlockTransformExtent.transform(base, ROTATE_90);
+            }
+            assertEquals(base, rotated);
+            rotated = base;
+            for (int i = 1; i < 4; i++) {
+                rotated = BlockTransformExtent.transform(base, ROTATE_NEG_90);
+            }
+            assertEquals(base, rotated);
+        }
+    }
+}