Created DungeonSchematic Class

Created DungeonSchematic, a class that extends Schematic and adds
DD-specific functionality such as methods for filtering the schematic's
block before importing and exporting. Testing confirms that
DungeonSchematic works well so far, although it still lacks critical
features.

Made some minor changes to Schematic and copied
SchematicLoader.setBlockDirectly(). I realized during testing that
setting blocks without using that function could cause problems. First,
it's possible that the blocks would not be placed if chunks weren't
created. Second, there are issues with blocks updating if we use World
to set them, even if block updates are disabled. That causes some
torches to break and other weird problems.

Added classes to support block filtering operations applied to
Schematic. These are used to implement ID standardization and removing
mod blocks when importing.

StevenDimDoors/mod_pocketDim/dungeon/DungeonSchematic.java

@@ -0,0 +1,112 @@
+package StevenDimDoors.mod_pocketDim.dungeon;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+
+import net.minecraft.world.World;
+import StevenDimDoors.mod_pocketDim.DDProperties;
+import StevenDimDoors.mod_pocketDim.schematic.CompoundFilter;
+import StevenDimDoors.mod_pocketDim.schematic.InvalidSchematicException;
+import StevenDimDoors.mod_pocketDim.schematic.ReplacementFilter;
+import StevenDimDoors.mod_pocketDim.schematic.Schematic;
+
+public class DungeonSchematic extends Schematic {
+
+	private static final short MAX_VANILLA_BLOCK_ID = 158;
+	private static final short STANDARD_FABRIC_OF_REALITY_ID = 1973;
+	private static final short STANDARD_ETERNAL_FABRIC_ID = 220;
+	private static final short[] MOD_BLOCK_FILTER_EXCEPTIONS = new short[] {
+		STANDARD_FABRIC_OF_REALITY_ID,
+		STANDARD_ETERNAL_FABRIC_ID
+	};
+	
+	private DungeonSchematic(Schematic source)
+	{
+		super(source);
+	}
+	
+	private DungeonSchematic()
+	{
+		//Used to create a dummy instance for readFromResource()
+		super((short) 0, (short) 0, (short) 0, null, null, null);
+	}
+
+	public static DungeonSchematic readFromFile(String schematicPath) throws FileNotFoundException, InvalidSchematicException
+	{
+		return readFromFile(new File(schematicPath));
+	}
+
+	public static DungeonSchematic readFromFile(File schematicFile) throws FileNotFoundException, InvalidSchematicException
+	{
+		return readFromStream(new FileInputStream(schematicFile));
+	}
+
+	public static DungeonSchematic readFromResource(String resourcePath) throws InvalidSchematicException
+	{
+		//We need an instance of a class in the mod to retrieve a resource
+		DungeonSchematic empty = new DungeonSchematic();
+		InputStream schematicStream = empty.getClass().getResourceAsStream(resourcePath);
+		return readFromStream(schematicStream);
+	}
+
+	public static DungeonSchematic readFromStream(InputStream schematicStream) throws InvalidSchematicException
+	{
+		return new DungeonSchematic(Schematic.readFromStream(schematicStream));
+	}
+	
+	public void ApplyImportFilters(DDProperties properties)
+	{
+		//Filter out mod blocks except some of our own
+		CompoundFilter standardizer = new CompoundFilter();
+		standardizer.addFilter(new ModBlockFilter(MAX_VANILLA_BLOCK_ID, MOD_BLOCK_FILTER_EXCEPTIONS,
+				(short) properties.FabricBlockID, (byte) 0));
+		
+		//Also convert standard DD block IDs to local versions
+		Map<Short, Short> mapping = getAssignedToStandardIDMapping(properties);
+		
+		for (Entry<Short, Short> entry : mapping.entrySet())
+		{
+			if (entry.getKey() != entry.getValue())
+			{
+				standardizer.addFilter(new ReplacementFilter(entry.getValue(), entry.getKey()));
+			}
+		}
+		standardizer.apply(this, this.blocks, this.metadata);
+	}
+	
+	public void ApplyExportFilters(DDProperties properties)
+	{
+		//Check if some block IDs assigned by Forge differ from our standard IDs
+		//If so, change the IDs to standard values
+		CompoundFilter standardizer = new CompoundFilter();
+		Map<Short, Short> mapping = getAssignedToStandardIDMapping(properties);
+		
+		for (Entry<Short, Short> entry : mapping.entrySet())
+		{
+			if (entry.getKey() != entry.getValue())
+			{
+				standardizer.addFilter(new ReplacementFilter(entry.getKey(), entry.getValue()));
+			}
+		}
+		standardizer.apply(this, this.blocks, this.metadata);
+	}
+	
+	private Map<Short, Short> getAssignedToStandardIDMapping(DDProperties properties)
+	{
+		//If we ever need this broadly or support other mods, this should be moved to a separate class
+		TreeMap<Short, Short> mapping = new TreeMap<Short, Short>();
+		mapping.put((short) properties.FabricBlockID, STANDARD_FABRIC_OF_REALITY_ID);
+		mapping.put((short) properties.PermaFabricBlockID, STANDARD_ETERNAL_FABRIC_ID);
+		return mapping;
+	}
+	
+	public static DungeonSchematic copyFromWorld(World world, int x, int y, int z, short width, short height, short length, boolean doCompactBounds)
+	{
+		return new DungeonSchematic(Schematic.copyFromWorld(world, x, y, z, width, height, length, doCompactBounds));
+	}
+}