Implement FuzzyBlockState

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BlockState.java

@@ -304,8 +304,11 @@ public class BlockState implements BlockStateHolder<BlockState>, FawePattern {
 
     @Override
     public boolean equalsFuzzy(BlockStateHolder<?> o) {
+        if (o.getClass() == BlockState.class) {
             return o.getOrdinal() == this.getOrdinal();
         }
+        return o.equalsFuzzy(this);
+    }
 
     @Override
     public BlockState toImmutableState() {

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BlockType.java

@@ -183,13 +183,9 @@ public class BlockType implements FawePattern {
         return this.settings.defaultState;
     }
 
-//    public FuzzyBlockState getFuzzyMatcher() { //
+    public FuzzyBlockState getFuzzyMatcher() { //
-//        return new FuzzyBlockState(this);
+        return new FuzzyBlockState(this);
-//    }
+    }
-//
-//    public FuzzyBlockState getFuzzyMatcher() { //
-//        return updateField(emptyFuzzy, () -> new FuzzyBlockState(this));
-//    }
 
     /**
      * Slow

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/FuzzyBlockState.java

@@ -0,0 +1,175 @@
+/*
+ * 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.world.block;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.collect.Maps;
+import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.registry.state.PropertyKey;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * A Fuzzy BlockState. Used for partial matching.
+ *
+ * Immutable, construct with {@link FuzzyBlockState.Builder}.
+ */
+public class FuzzyBlockState extends BlockState {
+
+    private final Map<PropertyKey, Object> state;
+
+    FuzzyBlockState(BlockType blockType) {
+        this(blockType, null);
+    }
+
+    private FuzzyBlockState(BlockType blockType, Map<Property<?>, Object> values) {
+        super(blockType, blockType.getDefaultState().getInternalId(), blockType.getDefaultState().getOrdinal());
+        if (values == null || values.isEmpty()) {
+            state = Collections.emptyMap();
+        } else {
+            state = new HashMap<>(values.size());
+            for (Map.Entry<Property<?>, Object> entry : values.entrySet()) {
+                state.put(entry.getKey().getKey(), entry.getValue());
+            }
+        }
+    }
+
+    /**
+     * Gets a full BlockState from this fuzzy one, filling in
+     * properties with default values where necessary.
+     *
+     * @return The full BlockState
+     */
+    public BlockState getFullState() {
+        BlockState state = getBlockType().getDefaultState();
+        for (Map.Entry<Property<?>, Object> entry : getStates().entrySet()) {
+            @SuppressWarnings("unchecked")
+            Property<Object> objKey = (Property<Object>) entry.getKey();
+            state = state.with(objKey, entry.getValue());
+        }
+        return state;
+    }
+
+    @Override
+    public boolean equalsFuzzy(BlockStateHolder<?> o) {
+        if (!getBlockType().equals(o.getBlockType())) {
+            return false;
+        }
+        if (!state.isEmpty()) {
+            for (Map.Entry<PropertyKey, Object> entry : state.entrySet()) {
+                if (!Objects.equals(o.getState(entry.getKey()), entry.getValue())) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public BlockState toImmutableState() {
+        return getFullState();
+    }
+
+    /**
+     * Gets an instance of a builder.
+     *
+     * @return The builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder for FuzzyBlockState
+     */
+    public static class Builder {
+        private BlockType type;
+        private Map<Property<?>, Object> values = new HashMap<>();
+
+        /**
+         * The type of the Fuzzy BlockState
+         *
+         * @param type The type
+         * @return The builder, for chaining
+         */
+        public Builder type(BlockType type) {
+            checkNotNull(type);
+            this.type = type;
+            return this;
+        }
+
+        /**
+         * The type of the Fuzzy BlockState
+         *
+         * @param state The state
+         * @return The builder, for chaining
+         */
+        public Builder type(BlockState state) {
+            checkNotNull(state);
+            this.type = state.getBlockType();
+            return this;
+        }
+
+        /**
+         * Adds a property to the fuzzy BlockState
+         *
+         * @param property The property
+         * @param value The value
+         * @param <V> The property type
+         * @return The builder, for chaining
+         */
+        public <V> Builder withProperty(Property<V> property, V value) {
+            checkNotNull(property);
+            checkNotNull(value);
+            checkNotNull(type, "The type must be set before the properties!");
+            type.getProperty(property.getName()); // Verify the property is valid for this type
+            values.put(property, value);
+            return this;
+        }
+
+        /**
+         * Builds a FuzzyBlockState from this builder.
+         *
+         * @return The fuzzy BlockState
+         */
+        public FuzzyBlockState build() {
+            checkNotNull(type);
+            if (values.isEmpty()) {
+                return type.getFuzzyMatcher();
+            }
+            return new FuzzyBlockState(type, values);
+        }
+
+        /**
+         * Resets the builder.
+         *
+         * @return The builder, for chaining
+         */
+        public Builder reset() {
+            this.type = null;
+            this.values.clear();
+            return this;
+        }
+    }
+}