001    package net.minecraft.src;
002    
003    import java.util.ArrayList;
004    import java.util.Iterator;
005    import java.util.List;
006    
007    public class EntityAITasks
008    {
009        /** A list of EntityAITaskEntrys in EntityAITasks. */
010        public List taskEntries = new ArrayList();
011    
012        /** A list of EntityAITaskEntrys that are currently being executed. */
013        private List executingTaskEntries = new ArrayList();
014    
015        /** Instance of Profiler. */
016        private final Profiler theProfiler;
017        private int field_75778_d = 0;
018        private int field_75779_e = 3;
019    
020        public EntityAITasks(Profiler par1Profiler)
021        {
022            this.theProfiler = par1Profiler;
023        }
024    
025        public void addTask(int par1, EntityAIBase par2EntityAIBase)
026        {
027            this.taskEntries.add(new EntityAITaskEntry(this, par1, par2EntityAIBase));
028        }
029    
030        public void onUpdateTasks()
031        {
032            ArrayList var1 = new ArrayList();
033            Iterator var2;
034            EntityAITaskEntry var3;
035    
036            if (this.field_75778_d++ % this.field_75779_e == 0)
037            {
038                var2 = this.taskEntries.iterator();
039    
040                while (var2.hasNext())
041                {
042                    var3 = (EntityAITaskEntry)var2.next();
043                    boolean var4 = this.executingTaskEntries.contains(var3);
044    
045                    if (var4)
046                    {
047                        if (this.func_75775_b(var3) && this.func_75773_a(var3))
048                        {
049                            continue;
050                        }
051    
052                        var3.action.resetTask();
053                        this.executingTaskEntries.remove(var3);
054                    }
055    
056                    if (this.func_75775_b(var3) && var3.action.shouldExecute())
057                    {
058                        var1.add(var3);
059                        this.executingTaskEntries.add(var3);
060                    }
061                }
062            }
063            else
064            {
065                var2 = this.executingTaskEntries.iterator();
066    
067                while (var2.hasNext())
068                {
069                    var3 = (EntityAITaskEntry)var2.next();
070    
071                    if (!var3.action.continueExecuting())
072                    {
073                        var3.action.resetTask();
074                        var2.remove();
075                    }
076                }
077            }
078    
079            this.theProfiler.startSection("goalStart");
080            var2 = var1.iterator();
081    
082            while (var2.hasNext())
083            {
084                var3 = (EntityAITaskEntry)var2.next();
085                this.theProfiler.startSection(var3.action.getClass().getSimpleName());
086                var3.action.startExecuting();
087                this.theProfiler.endSection();
088            }
089    
090            this.theProfiler.endSection();
091            this.theProfiler.startSection("goalTick");
092            var2 = this.executingTaskEntries.iterator();
093    
094            while (var2.hasNext())
095            {
096                var3 = (EntityAITaskEntry)var2.next();
097                this.theProfiler.startSection(var3.action.getClass().getSimpleName());
098                var3.action.updateTask();
099                this.theProfiler.endSection();
100            }
101    
102            this.theProfiler.endSection();
103        }
104    
105        private boolean func_75773_a(EntityAITaskEntry par1EntityAITaskEntry)
106        {
107            this.theProfiler.startSection("canContinue");
108            boolean var2 = par1EntityAITaskEntry.action.continueExecuting();
109            this.theProfiler.endSection();
110            return var2;
111        }
112    
113        private boolean func_75775_b(EntityAITaskEntry par1EntityAITaskEntry)
114        {
115            this.theProfiler.startSection("canUse");
116            Iterator var2 = this.taskEntries.iterator();
117    
118            while (var2.hasNext())
119            {
120                EntityAITaskEntry var3 = (EntityAITaskEntry)var2.next();
121    
122                if (var3 != par1EntityAITaskEntry)
123                {
124                    if (par1EntityAITaskEntry.priority >= var3.priority)
125                    {
126                        if (this.executingTaskEntries.contains(var3) && !this.areTasksCompatible(par1EntityAITaskEntry, var3))
127                        {
128                            this.theProfiler.endSection();
129                            return false;
130                        }
131                    }
132                    else if (this.executingTaskEntries.contains(var3) && !var3.action.isContinuous())
133                    {
134                        this.theProfiler.endSection();
135                        return false;
136                    }
137                }
138            }
139    
140            this.theProfiler.endSection();
141            return true;
142        }
143    
144        /**
145         * Returns whether two EntityAITaskEntries can be executed concurrently
146         */
147        private boolean areTasksCompatible(EntityAITaskEntry par1EntityAITaskEntry, EntityAITaskEntry par2EntityAITaskEntry)
148        {
149            return (par1EntityAITaskEntry.action.getMutexBits() & par2EntityAITaskEntry.action.getMutexBits()) == 0;
150        }
151    }