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papermc/CraftBukkit-Patches/0042-Stage-DataWatcher-WatchableObject.patch
md_5 ef3a64eea4 Stage DataWatcher & WatchableObject. 
So that we may identify the exact cause of exceptions originating from these classes.
2013-03-21 17:01:03 +11:00

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From 7001de7c59dd8347f67169cc67157cac1b253e82 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Thu, 21 Mar 2013 17:00:54 +1100
Subject: [PATCH] Stage DataWatcher & WatchableObject.
So that we may identify the exact cause of exceptions originating from these classes.
---
.../java/net/minecraft/server/DataWatcher.java | 287 +++++++++++++++++++++
.../java/net/minecraft/server/WatchableObject.java | 44 ++++
2 files changed, 331 insertions(+)
create mode 100644 src/main/java/net/minecraft/server/DataWatcher.java
create mode 100644 src/main/java/net/minecraft/server/WatchableObject.java
diff --git a/src/main/java/net/minecraft/server/DataWatcher.java b/src/main/java/net/minecraft/server/DataWatcher.java
new file mode 100644
index 0000000..f0fa9ca
--- /dev/null
+++ b/src/main/java/net/minecraft/server/DataWatcher.java
@@ -0,0 +1,287 @@
+package net.minecraft.server;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+public class DataWatcher {
+
+ private boolean a = true;
+ private static final HashMap b = new HashMap();
+ private final Map c = new HashMap();
+ private boolean d;
+ private ReadWriteLock e = new ReentrantReadWriteLock();
+
+ public DataWatcher() {}
+
+ public void a(int i, Object object) {
+ Integer integer = (Integer) b.get(object.getClass());
+
+ if (integer == null) {
+ throw new IllegalArgumentException("Unknown data type: " + object.getClass());
+ } else if (i > 31) {
+ throw new IllegalArgumentException("Data value id is too big with " + i + "! (Max is " + 31 + ")");
+ } else if (this.c.containsKey(Integer.valueOf(i))) {
+ throw new IllegalArgumentException("Duplicate id value for " + i + "!");
+ } else {
+ WatchableObject watchableobject = new WatchableObject(integer.intValue(), i, object);
+
+ this.e.writeLock().lock();
+ this.c.put(Integer.valueOf(i), watchableobject);
+ this.e.writeLock().unlock();
+ this.a = false;
+ }
+ }
+
+ public void a(int i, int j) {
+ WatchableObject watchableobject = new WatchableObject(j, i, null);
+
+ this.e.writeLock().lock();
+ this.c.put(Integer.valueOf(i), watchableobject);
+ this.e.writeLock().unlock();
+ this.a = false;
+ }
+
+ public byte getByte(int i) {
+ return ((Byte) this.i(i).b()).byteValue();
+ }
+
+ public short getShort(int i) {
+ return ((Short) this.i(i).b()).shortValue();
+ }
+
+ public int getInt(int i) {
+ return ((Integer) this.i(i).b()).intValue();
+ }
+
+ public String getString(int i) {
+ return (String) this.i(i).b();
+ }
+
+ public ItemStack getItemStack(int i) {
+ return (ItemStack) this.i(i).b();
+ }
+
+ private WatchableObject i(int i) {
+ this.e.readLock().lock();
+
+ WatchableObject watchableobject;
+
+ try {
+ watchableobject = (WatchableObject) this.c.get(Integer.valueOf(i));
+ } catch (Throwable throwable) {
+ CrashReport crashreport = CrashReport.a(throwable, "Getting synched entity data");
+ CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Synched entity data");
+
+ crashreportsystemdetails.a("Data ID", Integer.valueOf(i));
+ throw new ReportedException(crashreport);
+ }
+
+ this.e.readLock().unlock();
+ return watchableobject;
+ }
+
+ public void watch(int i, Object object) {
+ WatchableObject watchableobject = this.i(i);
+
+ if (!object.equals(watchableobject.b())) {
+ watchableobject.a(object);
+ watchableobject.a(true);
+ this.d = true;
+ }
+ }
+
+ public void h(int i) {
+ WatchableObject.a(this.i(i), true);
+ this.d = true;
+ }
+
+ public boolean a() {
+ return this.d;
+ }
+
+ public static void a(List list, DataOutputStream dataoutputstream) throws IOException { // Spigot
+ if (list != null) {
+ Iterator iterator = list.iterator();
+
+ while (iterator.hasNext()) {
+ WatchableObject watchableobject = (WatchableObject) iterator.next();
+
+ a(dataoutputstream, watchableobject);
+ }
+ }
+
+ dataoutputstream.writeByte(127);
+ }
+
+ public List b() {
+ ArrayList arraylist = null;
+
+ if (this.d) {
+ this.e.readLock().lock();
+ Iterator iterator = this.c.values().iterator();
+
+ while (iterator.hasNext()) {
+ WatchableObject watchableobject = (WatchableObject) iterator.next();
+
+ if (watchableobject.d()) {
+ watchableobject.a(false);
+ if (arraylist == null) {
+ arraylist = new ArrayList();
+ }
+
+ arraylist.add(watchableobject);
+ }
+ }
+
+ this.e.readLock().unlock();
+ }
+
+ this.d = false;
+ return arraylist;
+ }
+
+ public void a(DataOutputStream dataoutputstream) throws IOException { // Spigot
+ this.e.readLock().lock();
+ Iterator iterator = this.c.values().iterator();
+
+ while (iterator.hasNext()) {
+ WatchableObject watchableobject = (WatchableObject) iterator.next();
+
+ a(dataoutputstream, watchableobject);
+ }
+
+ this.e.readLock().unlock();
+ dataoutputstream.writeByte(127);
+ }
+
+ public List c() {
+ ArrayList arraylist = null;
+
+ this.e.readLock().lock();
+
+ WatchableObject watchableobject;
+
+ for (Iterator iterator = this.c.values().iterator(); iterator.hasNext(); arraylist.add(watchableobject)) {
+ watchableobject = (WatchableObject) iterator.next();
+ if (arraylist == null) {
+ arraylist = new ArrayList();
+ }
+ }
+
+ this.e.readLock().unlock();
+ return arraylist;
+ }
+
+ private static void a(DataOutputStream dataoutputstream, WatchableObject watchableobject) throws IOException { // Spigot
+ int i = (watchableobject.c() << 5 | watchableobject.a() & 31) & 255;
+
+ dataoutputstream.writeByte(i);
+ switch (watchableobject.c()) {
+ case 0:
+ dataoutputstream.writeByte(((Byte) watchableobject.b()).byteValue());
+ break;
+
+ case 1:
+ dataoutputstream.writeShort(((Short) watchableobject.b()).shortValue());
+ break;
+
+ case 2:
+ dataoutputstream.writeInt(((Integer) watchableobject.b()).intValue());
+ break;
+
+ case 3:
+ dataoutputstream.writeFloat(((Float) watchableobject.b()).floatValue());
+ break;
+
+ case 4:
+ Packet.a((String) watchableobject.b(), dataoutputstream);
+ break;
+
+ case 5:
+ ItemStack itemstack = (ItemStack) watchableobject.b();
+
+ Packet.a(itemstack, dataoutputstream);
+ break;
+
+ case 6:
+ ChunkCoordinates chunkcoordinates = (ChunkCoordinates) watchableobject.b();
+
+ dataoutputstream.writeInt(chunkcoordinates.x);
+ dataoutputstream.writeInt(chunkcoordinates.y);
+ dataoutputstream.writeInt(chunkcoordinates.z);
+ }
+ }
+
+ public static List a(DataInputStream datainputstream) throws IOException { // Spigot
+ ArrayList arraylist = null;
+
+ for (byte b0 = datainputstream.readByte(); b0 != 127; b0 = datainputstream.readByte()) {
+ if (arraylist == null) {
+ arraylist = new ArrayList();
+ }
+
+ int i = (b0 & 224) >> 5;
+ int j = b0 & 31;
+ WatchableObject watchableobject = null;
+
+ switch (i) {
+ case 0:
+ watchableobject = new WatchableObject(i, j, Byte.valueOf(datainputstream.readByte()));
+ break;
+
+ case 1:
+ watchableobject = new WatchableObject(i, j, Short.valueOf(datainputstream.readShort()));
+ break;
+
+ case 2:
+ watchableobject = new WatchableObject(i, j, Integer.valueOf(datainputstream.readInt()));
+ break;
+
+ case 3:
+ watchableobject = new WatchableObject(i, j, Float.valueOf(datainputstream.readFloat()));
+ break;
+
+ case 4:
+ watchableobject = new WatchableObject(i, j, Packet.a(datainputstream, 64));
+ break;
+
+ case 5:
+ watchableobject = new WatchableObject(i, j, Packet.c(datainputstream));
+ break;
+
+ case 6:
+ int k = datainputstream.readInt();
+ int l = datainputstream.readInt();
+ int i1 = datainputstream.readInt();
+
+ watchableobject = new WatchableObject(i, j, new ChunkCoordinates(k, l, i1));
+ }
+
+ arraylist.add(watchableobject);
+ }
+
+ return arraylist;
+ }
+
+ public boolean d() {
+ return this.a;
+ }
+
+ static {
+ b.put(Byte.class, Integer.valueOf(0));
+ b.put(Short.class, Integer.valueOf(1));
+ b.put(Integer.class, Integer.valueOf(2));
+ b.put(Float.class, Integer.valueOf(3));
+ b.put(String.class, Integer.valueOf(4));
+ b.put(ItemStack.class, Integer.valueOf(5));
+ b.put(ChunkCoordinates.class, Integer.valueOf(6));
+ }
+}
diff --git a/src/main/java/net/minecraft/server/WatchableObject.java b/src/main/java/net/minecraft/server/WatchableObject.java
new file mode 100644
index 0000000..678aa91
--- /dev/null
+++ b/src/main/java/net/minecraft/server/WatchableObject.java
@@ -0,0 +1,44 @@
+package net.minecraft.server;
+
+public class WatchableObject {
+
+ private final int a;
+ private final int b;
+ private Object c;
+ private boolean d;
+
+ public WatchableObject(int i, int j, Object object) {
+ this.b = j;
+ this.c = object;
+ this.a = i;
+ this.d = true;
+ }
+
+ public int a() {
+ return this.b;
+ }
+
+ public void a(Object object) {
+ this.c = object;
+ }
+
+ public Object b() {
+ return this.c;
+ }
+
+ public int c() {
+ return this.a;
+ }
+
+ public boolean d() {
+ return this.d;
+ }
+
+ public void a(boolean flag) {
+ this.d = flag;
+ }
+
+ static boolean a(WatchableObject watchableobject, boolean flag) {
+ return watchableobject.d = flag;
+ }
+}
--
1.8.1-rc2
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