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Move our Externalizeable to PrimitveExChunkletStore

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This will let us deserialize Primitive normally.

In addition, we now enforce all chunklets being of type PrimitiveEx, as any non-Ex are repalced with a new Ex on load.
This commit is contained in:
NuclearW 2012-07-06 21:29:44 -04:00
parent 77dce75108
commit da6b461408
5 changed files with 202 additions and 126 deletions
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13
src/main/java/com/gmail/nossr50/util/blockmeta/ChunkletStore.java
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@ -1,9 +1,11 @@
package com.gmail.nossr50.util.blockmeta;
import java.io.Externalizable;
import java.io.Serializable;
public interface ChunkletStore extends Serializable, Externalizable {
/**
* A ChunkletStore should be responsible for a 16x16x64 area of data
*/
public interface ChunkletStore extends Serializable {
/**
* Checks the value at the given coordinates
*
@ -36,4 +38,11 @@ public interface ChunkletStore extends Serializable, Externalizable {
* @return true if all values in the chunklet are false, false if otherwise
*/
public boolean isEmpty();
/**
* Set all values in this ChunkletStore to the values from another provided ChunkletStore
*
* @param otherStore Another ChunkletStore that this one should copy all data from
*/
public void copyFrom(ChunkletStore otherStore);
}

2
src/main/java/com/gmail/nossr50/util/blockmeta/ChunkletStoreFactory.java
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@ -3,6 +3,6 @@ package com.gmail.nossr50.util.blockmeta;
public class ChunkletStoreFactory {
protected static ChunkletStore getChunkletStore() {
// TODO: Add in loading from config what type of store we want.
return new PrimitiveChunkletStore();
return new PrimitiveExChunkletStore();
}
}

9
src/main/java/com/gmail/nossr50/util/blockmeta/HashChunkletManager.java
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@ -338,6 +338,15 @@ public class HashChunkletManager implements ChunkletManager {
}
}
// TODO: Make this less messy, as it is, it's kinda... depressing to do it like this.
// Might also make a mess when we move to stacks, but at that point I think I will write a new Manager...
// IMPORTANT! If ChunkletStoreFactory is going to be returning something other than PrimitiveEx we need to remove this, as it will be breaking time for old maps
if(!(storeIn instanceof PrimitiveExChunkletStore)) {
ChunkletStore tempStore = ChunkletStoreFactory.getChunkletStore();
tempStore.copyFrom(storeIn);
storeIn = tempStore;
}
return storeIn;
}
}

126
src/main/java/com/gmail/nossr50/util/blockmeta/PrimitiveChunkletStore.java
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@ -1,14 +1,10 @@
package com.gmail.nossr50.util.blockmeta;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
public class PrimitiveChunkletStore implements ChunkletStore {
private static final long serialVersionUID = -3453078050608607478L;
/** X, Z, Y */
private boolean[][][] store = new boolean[16][16][64];
protected boolean[][][] store = new boolean[16][16][64];
@Override
public boolean isTrue(int x, int y, int z) {
@ -38,129 +34,13 @@ public class PrimitiveChunkletStore implements ChunkletStore {
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
byte[] buffer = new byte[2304]; // 2304 is 16*16*9
int bufferIndex = 0;
public void copyFrom(ChunkletStore otherStore) {
for(int x = 0; x < 16; x++) {
for(int z = 0; z < 16; z++) {
for(int y = 0; y < 64; y++) {
if(store[x][z][y]) {
byte[] temp = constructColumn(x, z);
for(int i = 0; i < 9; i++) {
buffer[bufferIndex] = temp[i];
bufferIndex++;
}
break;
}
store[x][z][y] = otherStore.isTrue(x, y, z);
}
}
}
out.write(buffer, 0, bufferIndex);
out.flush();
}
// For this we assume that store has been initialized to be all false by now
@Override
public void readExternal(ObjectInput in) throws IOException {
byte[] temp = new byte[9];
// Could probably reorganize this loop to print nasty things if it does not equal 9 or -1
while(in.read(temp, 0, 9) == 9) {
int x = addressByteX(temp[0]);
int z = addressByteZ(temp[0]);
boolean[] yColumn = new boolean[64];
for(int i = 0; i < 8; i++) {
for(int j = 0; j < 8; j++) {
yColumn[j + (i * 8)] = (temp[i + 1] & (1 << j)) != 0;
}
}
store[x][z] = yColumn;
}
}
/*
* The column: An array of 9 bytes which represent all y values for a given (x,z) Chunklet-coordinate
*
* The first byte is an address byte, this provides the x and z values.
* The next 8 bytes are all y values from 0 to 63, with each byte containing 8 bits of true/false data
*
* Each of these 8 bytes address to a y value from right to left
*
* Examples:
* 00000001 represents that the lowest y value in this byte is true, all others are off
* 10000000 represents that the highest y value in this byte is true, all others are off
* 10000001 represents that the lowest and highest y values in this byte are true, all others are off
*
* Full columns:
* See comment on Address byte for information on how to use that byte
*
* Example:
* ADDRESS_BYTE 10000000 00000001 00000000 00000000 00000000 00000000 00000000 00000000
* - x, z from ADDRESS_BYTE
* - The next byte contains data from 0 to 7
* - 1 is set in the highest bit position, this is 7 in y coordinate
* - The next byte contains data from 8 to 15
* - 1 is set in the lowest bit position, this is 8 in the y coordinate
* Therefore, for this column: There are true values at (x, 7, z) and (x, 8, z)
*/
private byte[] constructColumn(int x, int z) {
byte[] column = new byte[9];
int index = 1;
column[0] = makeAddressByte(x, z);
for (int i = 0; i < 8; i++){
byte yCompressed = 0x0;
int subColumnIndex = 8 * i;
int subColumnEnd = subColumnIndex + 8;
for(int y = subColumnIndex; y < subColumnEnd; y++) {
if(store[x][z][y]) {
yCompressed |= 1 << (y % 8);
}
}
column[index] = yCompressed;
index++;
}
return column;
}
/*
* The address byte: A single byte which contains x and z values which correspond to the x and z Chunklet-coordinates
*
* In Chunklet-coordinates, the only valid values are 0-15, so we can fit both into a single byte.
*
* The top 4 bits of the address byte are for the x value
* The bottom 4 bits of the address byte are for the z value
*
* Examples:
* An address byte with a value 00000001 would be split like so:
* - x = 0000 = 0
* - z = 0001 = 1
* => Chunklet coordinates (0, 1)
*
* 01011111
* - x = 0101 = 5
* - z = 1111 = 15
* => Chunklet coordinates (5, 15)
*/
private static byte makeAddressByte(int x, int z) {
return (byte) ((x << 4) + z);
}
private static int addressByteX(byte address) {
return (address & 0xF0) >>> 4;
}
private static int addressByteZ(byte address) {
return address & 0x0F;
}
}

178
src/main/java/com/gmail/nossr50/util/blockmeta/PrimitiveExChunkletStore.java Normal file
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@ -0,0 +1,178 @@
package com.gmail.nossr50.util.blockmeta;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
public class PrimitiveExChunkletStore implements ChunkletStore, Externalizable {
private static final long serialVersionUID = 8603603827094383873L;
/** X, Z, Y */
private boolean[][][] store = new boolean[16][16][64];
@Override
public boolean isTrue(int x, int y, int z) {
return store[x][z][y];
}
@Override
public void setTrue(int x, int y, int z) {
store[x][z][y] = true;
}
@Override
public void setFalse(int x, int y, int z) {
store[x][z][y] = false;
}
@Override
public boolean isEmpty() {
for(int x = 0; x < 16; x++) {
for(int z = 0; z < 16; z++) {
for(int y = 0; y < 64; y++) {
if(store[x][z][y]) return false;
}
}
}
return true;
}
@Override
public void copyFrom(ChunkletStore otherStore) {
for(int x = 0; x < 16; x++) {
for(int z = 0; z < 16; z++) {
for(int y = 0; y < 64; y++) {
store[x][z][y] = otherStore.isTrue(x, y, z);
}
}
}
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
byte[] buffer = new byte[2304]; // 2304 is 16*16*9
int bufferIndex = 0;
for(int x = 0; x < 16; x++) {
for(int z = 0; z < 16; z++) {
for(int y = 0; y < 64; y++) {
if(store[x][z][y]) {
byte[] temp = constructColumn(x, z);
for(int i = 0; i < 9; i++) {
buffer[bufferIndex] = temp[i];
bufferIndex++;
}
break;
}
}
}
}
out.write(buffer, 0, bufferIndex);
out.flush();
}
// For this we assume that store has been initialized to be all false by now
@Override
public void readExternal(ObjectInput in) throws IOException {
byte[] temp = new byte[9];
// Could probably reorganize this loop to print nasty things if it does not equal 9 or -1
while(in.read(temp, 0, 9) == 9) {
int x = addressByteX(temp[0]);
int z = addressByteZ(temp[0]);
boolean[] yColumn = new boolean[64];
for(int i = 0; i < 8; i++) {
for(int j = 0; j < 8; j++) {
yColumn[j + (i * 8)] = (temp[i + 1] & (1 << j)) != 0;
}
}
store[x][z] = yColumn;
}
}
/*
* The column: An array of 9 bytes which represent all y values for a given (x,z) Chunklet-coordinate
*
* The first byte is an address byte, this provides the x and z values.
* The next 8 bytes are all y values from 0 to 63, with each byte containing 8 bits of true/false data
*
* Each of these 8 bytes address to a y value from right to left
*
* Examples:
* 00000001 represents that the lowest y value in this byte is true, all others are off
* 10000000 represents that the highest y value in this byte is true, all others are off
* 10000001 represents that the lowest and highest y values in this byte are true, all others are off
*
* Full columns:
* See comment on Address byte for information on how to use that byte
*
* Example:
* ADDRESS_BYTE 10000000 00000001 00000000 00000000 00000000 00000000 00000000 00000000
* - x, z from ADDRESS_BYTE
* - The next byte contains data from 0 to 7
* - 1 is set in the highest bit position, this is 7 in y coordinate
* - The next byte contains data from 8 to 15
* - 1 is set in the lowest bit position, this is 8 in the y coordinate
* Therefore, for this column: There are true values at (x, 7, z) and (x, 8, z)
*/
private byte[] constructColumn(int x, int z) {
byte[] column = new byte[9];
int index = 1;
column[0] = makeAddressByte(x, z);
for (int i = 0; i < 8; i++){
byte yCompressed = 0x0;
int subColumnIndex = 8 * i;
int subColumnEnd = subColumnIndex + 8;
for(int y = subColumnIndex; y < subColumnEnd; y++) {
if(store[x][z][y]) {
yCompressed |= 1 << (y % 8);
}
}
column[index] = yCompressed;
index++;
}
return column;
}
/*
* The address byte: A single byte which contains x and z values which correspond to the x and z Chunklet-coordinates
*
* In Chunklet-coordinates, the only valid values are 0-15, so we can fit both into a single byte.
*
* The top 4 bits of the address byte are for the x value
* The bottom 4 bits of the address byte are for the z value
*
* Examples:
* An address byte with a value 00000001 would be split like so:
* - x = 0000 = 0
* - z = 0001 = 1
* => Chunklet coordinates (0, 1)
*
* 01011111
* - x = 0101 = 5
* - z = 1111 = 15
* => Chunklet coordinates (5, 15)
*/
private static byte makeAddressByte(int x, int z) {
return (byte) ((x << 4) + z);
}
private static int addressByteX(byte address) {
return (address & 0xF0) >>> 4;
}
private static int addressByteZ(byte address) {
return address & 0x0F;
}
}