public synchronized boolean write(RegionFileCache regionFileCache) {
boolean error = false;
RegionFile regionFile = regionFileCache.getRegionFile(this.x << 4, this.z << 4, this.dimension);
if (!regionFile.isOpen()) {
error = regionFile.open();
}
if (!error) {
DataOutputStream dos = regionFile.getChunkDataOutputStream(this.x & 31, this.z & 31);
if (dos != null) {
Nbt chunkNbt = this.getNbt();
try {
// RegionManager.logInfo("writing chunk (%d, %d) to region file", this.x, this.z);
chunkNbt.writeElement(dos);
} catch (IOException e) {
RegionManager.logError(
"%s: could not write chunk (%d, %d) to region file", e, this.x, this.z);
error = true;
} finally {
try {
dos.close();
} catch (IOException e) {
RegionManager.logError("%s while closing chunk data output stream", e);
}
}
} else {
RegionManager.logError(
"error: could not get output stream for chunk (%d, %d)", this.x, this.z);
}
} else {
RegionManager.logError(
"error: could not open region file for chunk (%d, %d)", this.x, this.z);
}
return error;
}
// load from anvil file
public static MwChunk read(int x, int z, int dimension, RegionFileCache regionFileCache) {
byte[] biomeArray = null;
byte[][] msbArray = new byte[16][];
byte[][] lsbArray = new byte[16][];
byte[][] metaArray = new byte[16][];
byte[][] lightingArray = new byte[16][];
DataInputStream dis = null;
RegionFile regionFile = regionFileCache.getRegionFile(x << 4, z << 4, dimension);
if (!regionFile.isOpen()) {
if (regionFile.exists()) {
regionFile.open();
}
}
if (regionFile.isOpen()) {
dis = regionFile.getChunkDataInputStream(x & 31, z & 31);
}
if (dis != null) {
try {
// chunk NBT structure:
//
// COMPOUND ""
// COMPOUND "level"
// INT "xPos"
// INT "zPos"
// LONG "LastUpdate"
// BYTE "TerrainPopulated"
// BYTE_ARRAY "Biomes"
// INT_ARRAY "HeightMap"
// LIST(COMPOUND) "Sections"
// BYTE "Y"
// BYTE_ARRAY "Blocks"
// BYTE_ARRAY "Add"
// BYTE_ARRAY "Data"
// BYTE_ARRAY "BlockLight"
// BYTE_ARRAY "SkyLight"
// END
// LIST(COMPOUND) "Entities"
// LIST(COMPOUND) "TileEntities"
// LIST(COMPOUND) "TileTicks"
// END
// END
Nbt root = Nbt.readNextElement(dis);
Nbt level = root.getChild("Level");
int xNbt = level.getChild("xPos").getInt();
int zNbt = level.getChild("zPos").getInt();
if ((xNbt != x) || (zNbt != z)) {
RegionManager.logWarning("chunk (%d, %d) has NBT coords (%d, %d)", x, z, xNbt, zNbt);
}
Nbt sections = level.getChild("Sections");
// loop through each of the sections (16 x 16 x 16 block volumes) present
for (int i = 0; i < sections.size(); i++) {
Nbt section = sections.getChild(i);
if (!section.isNull()) {
int y = section.getChild("Y").getByte();
lsbArray[y & 0xf] = section.getChild("Blocks").getByteArray();
msbArray[y & 0xf] = section.getChild("Add").getByteArray();
metaArray[y & 0xf] = section.getChild("Data").getByteArray();
}
}
biomeArray = level.getChild("Biomes").getByteArray();
} catch (IOException e) {
RegionManager.logError("%s: could not read chunk (%d, %d) from region file\n", e, x, z);
} finally {
try {
dis.close();
} catch (IOException e) {
RegionManager.logError("MwChunk.read: %s while closing input stream", e);
}
}
// this.log("MwChunk.read: chunk (%d, %d) empty=%b", this.x, this.z, empty);
} else {
// this.log("MwChunk.read: chunk (%d, %d) input stream is null", this.x, this.z);
}
return new MwChunk(x, z, dimension, msbArray, lsbArray, metaArray, lightingArray, biomeArray);
}
public Nbt getNbt() {
Nbt sections = new Nbt(Nbt.TAG_LIST, "Sections", null);
for (int y = 0; y < 16; y++) {
Nbt section = new Nbt(Nbt.TAG_COMPOUND, "", null);
section.addChild(new Nbt(Nbt.TAG_BYTE, "Y", (byte) y));
if ((this.lsbArray != null) && (this.lsbArray[y] != null)) {
section.addChild(new Nbt(Nbt.TAG_BYTE_ARRAY, "Blocks", this.lsbArray[y]));
}
if ((this.msbArray != null) && (this.msbArray[y] != null)) {
section.addChild(new Nbt(Nbt.TAG_BYTE_ARRAY, "Add", this.msbArray[y]));
}
if ((this.metaArray != null) && (this.metaArray[y] != null)) {
section.addChild(new Nbt(Nbt.TAG_BYTE_ARRAY, "Data", this.metaArray[y]));
}
sections.addChild(section);
}
Nbt level = new Nbt(Nbt.TAG_COMPOUND, "Level", null);
level.addChild(new Nbt(Nbt.TAG_INT, "xPos", this.x));
level.addChild(new Nbt(Nbt.TAG_INT, "zPos", this.z));
level.addChild(sections);
if (this.biomeArray != null) {
level.addChild(new Nbt(Nbt.TAG_BYTE_ARRAY, "Biomes", this.biomeArray));
}
Nbt root = new Nbt(Nbt.TAG_COMPOUND, "", null);
root.addChild(level);
return root;
}
