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