EntityAINearestAttackableTarget.java

package net.minecraft.entity.ai;

import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import net.minecraft.command.IEntitySelector;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityCreature;
import net.minecraft.entity.EntityLivingBase;

public class EntityAINearestAttackableTarget extends EntityAITarget
{
    private final Class targetClass;
    private final int targetChance;
    /** Instance of EntityAINearestAttackableTargetSorter. */
    private final EntityAINearestAttackableTarget.Sorter theNearestAttackableTargetSorter;
    /**
     * This filter is applied to the Entity search.  Only matching entities will be targetted.  (null -> no
     * restrictions)
     */
    private final IEntitySelector targetEntitySelector;
    private EntityLivingBase targetEntity;
    private static final String __OBFID = "CL_00001620";

    public EntityAINearestAttackableTarget(EntityCreature p_i1663_1_, Class p_i1663_2_, int p_i1663_3_, boolean p_i1663_4_)
    {
        this(p_i1663_1_, p_i1663_2_, p_i1663_3_, p_i1663_4_, false);
    }

    public EntityAINearestAttackableTarget(EntityCreature p_i1664_1_, Class p_i1664_2_, int p_i1664_3_, boolean p_i1664_4_, boolean p_i1664_5_)
    {
        this(p_i1664_1_, p_i1664_2_, p_i1664_3_, p_i1664_4_, p_i1664_5_, (IEntitySelector)null);
    }

    public EntityAINearestAttackableTarget(EntityCreature p_i1665_1_, Class p_i1665_2_, int p_i1665_3_, boolean p_i1665_4_, boolean p_i1665_5_, final IEntitySelector p_i1665_6_)
    {
        super(p_i1665_1_, p_i1665_4_, p_i1665_5_);
        this.targetClass = p_i1665_2_;
        this.targetChance = p_i1665_3_;
        this.theNearestAttackableTargetSorter = new EntityAINearestAttackableTarget.Sorter(p_i1665_1_);
        this.setMutexBits(1);
        this.targetEntitySelector = new IEntitySelector()
        {
            private static final String __OBFID = "CL_00001621";
            /**
             * Return whether the specified entity is applicable to this filter.
             */
            public boolean isEntityApplicable(Entity p_82704_1_)
            {
                return !(p_82704_1_ instanceof EntityLivingBase) ? false : (p_i1665_6_ != null && !p_i1665_6_.isEntityApplicable(p_82704_1_) ? false : EntityAINearestAttackableTarget.this.isSuitableTarget((EntityLivingBase)p_82704_1_, false));
            }
        };
    }

    /**
     * Returns whether the EntityAIBase should begin execution.
     */
    public boolean shouldExecute()
    {
        if (this.targetChance > 0 && this.taskOwner.getRNG().nextInt(this.targetChance) != 0)
        {
            return false;
        }
        else
        {
            double d0 = this.getTargetDistance();
            List list = this.taskOwner.worldObj.selectEntitiesWithinAABB(this.targetClass, this.taskOwner.boundingBox.expand(d0, 4.0D, d0), this.targetEntitySelector);
            Collections.sort(list, this.theNearestAttackableTargetSorter);

            if (list.isEmpty())
            {
                return false;
            }
            else
            {
                this.targetEntity = (EntityLivingBase)list.get(0);
                return true;
            }
        }
    }

    /**
     * Execute a one shot task or start executing a continuous task
     */
    public void startExecuting()
    {
        this.taskOwner.setAttackTarget(this.targetEntity);
        super.startExecuting();
    }

    public static class Sorter implements Comparator
        {
            private final Entity theEntity;
            private static final String __OBFID = "CL_00001622";

            public Sorter(Entity p_i1662_1_)
            {
                this.theEntity = p_i1662_1_;
            }

            public int compare(Entity p_compare_1_, Entity p_compare_2_)
            {
                double d0 = this.theEntity.getDistanceSqToEntity(p_compare_1_);
                double d1 = this.theEntity.getDistanceSqToEntity(p_compare_2_);
                return d0 < d1 ? -1 : (d0 > d1 ? 1 : 0);
            }

            public int compare(Object p_compare_1_, Object p_compare_2_)
            {
                return this.compare((Entity)p_compare_1_, (Entity)p_compare_2_);
            }
        }
}