Applied-Energistics-2-tiler.../util/item/AESharedNBT.java
2014-01-20 10:41:37 -06:00

174 lines
4 KiB
Java

package appeng.util.item;
import java.lang.ref.WeakReference;
import java.util.Iterator;
import java.util.WeakHashMap;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import appeng.api.AEApi;
import appeng.api.features.IItemComparison;
import appeng.api.storage.data.IAETagCompound;
import appeng.util.Platform;
/*
* this is used for the shared NBT Cache.
*/
public class AESharedNBT extends NBTTagCompound implements IAETagCompound
{
private int itemid, meta, hash;
public SharedSearchObject sso;
private IItemComparison comp;
public int getHash()
{
return hash;
}
@Override
public IItemComparison getSpecialComparison()
{
return comp;
}
private AESharedNBT(int itemID, int damageValue, String name) {
super( name );
itemid = itemID;
meta = damageValue;
}
@Override
public NBTTagCompound getNBTTagCompoundCopy()
{
return (NBTTagCompound) copy();
}
public static AESharedNBT createFromCompound(int itemID, int damageValue, NBTTagCompound c)
{
AESharedNBT x = new AESharedNBT( itemID, damageValue, c.getName() );
Iterator var2 = c.getTags().iterator();
while (var2.hasNext())
{
NBTBase tag = (NBTBase) var2.next();
x.setTag( tag.getName(), (NBTBase) tag.copy() );
}
x.hash = Platform.NBTOrderlessHash( c );
ItemStack isc = new ItemStack( itemID, 1, damageValue );
isc.setTagCompound( c );
x.comp = AEApi.instance().registries().specialComparson().getSpecialComparion( isc );
return x;
}
@Override
public boolean equals(Object par1Obj)
{
if ( par1Obj instanceof AESharedNBT )
return this == par1Obj;
return super.equals( par1Obj );
}
public boolean matches(int itemid2, int meta2, int orderlessHash)
{
return itemid2 == itemid && meta == meta2 && hash == orderlessHash;
}
public boolean comparePreciseWithRegistry(AESharedNBT tagCompound)
{
if ( this == tagCompound )
return true;
if ( comp != null && tagCompound.comp != null )
{
return comp.sameAsPrecise( tagCompound.comp );
}
return false;
}
public boolean compareFuzzyWithRegistry(AESharedNBT tagCompound)
{
if ( this == tagCompound )
return true;
if ( tagCompound == null )
return false;
if ( comp == tagCompound.comp )
return true;
if ( comp != null )
{
return comp.sameAsFuzzy( tagCompound.comp );
}
return false;
}
/*
* Shared Tag Compound Cache.
*/
private static WeakHashMap<SharedSearchObject, WeakReference<SharedSearchObject>> sharedTagCompounts = new WeakHashMap();
/*
* Debug purposes.
*/
public static int sharedTagLoad()
{
return sharedTagCompounts.size();
}
/*
* returns true if the compound is part of the shared compound system ( and can thus be compared directly ).
*/
public static boolean isShared(NBTTagCompound ta)
{
return ta instanceof AESharedNBT;
}
/*
* Returns an NBT Compound that is used for accelerating comparisons.
*/
synchronized public static NBTTagCompound getSharedTagCompound(NBTTagCompound tagCompound, ItemStack s)
{
if ( tagCompound.hasNoTags() )
return null;
int itemid = s.itemID;
int meta = -1;
if ( s.itemID != 0 && s.isItemStackDamageable() && s.getHasSubtypes() )
meta = s.getItemDamage();
if ( isShared( tagCompound ) )
return tagCompound;
SharedSearchObject sso = new SharedSearchObject( itemid, meta, tagCompound );
WeakReference<SharedSearchObject> c = sharedTagCompounts.get( sso );
if ( c != null )
{
SharedSearchObject cg = c.get();
if ( cg != null )
return cg.shared; // I don't think I really need to check this
// as its already certain to exist..
}
AESharedNBT clone = AESharedNBT.createFromCompound( itemid, meta, tagCompound );
sso.compound = (NBTTagCompound) sso.compound.copy(); // prevent
// modification
// of data based
// on original
// item.
sso.shared = clone;
clone.sso = sso;
sharedTagCompounts.put( sso, new WeakReference<SharedSearchObject>( sso ) );
return clone;
}
}