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package gregtech.api.objects;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import net.minecraft.item.ItemStack;
import gregtech.api.GregTechAPI;
import gregtech.api.util.GTUtility;
public class GTHashSet<E extends GTItemStack> extends AbstractSet<E> {
private static final Object OBJECT = new Object();
private final transient HashMap<GTItemStack, Object> map;
public GTHashSet() {
map = new HashMap<>();
GregTechAPI.sItemStackMappings.add(map);
}
public GTHashSet(Collection<? extends E> c) {
map = new HashMap<>(Math.max((int) (c.size() / .75f) + 1, 16));
addAll(c);
GregTechAPI.sItemStackMappings.add(map);
}
public GTHashSet(int initialCapacity, float loadFactor) {
map = new HashMap<>(initialCapacity, loadFactor);
GregTechAPI.sItemStackMappings.add(map);
}
public GTHashSet(int initialCapacity) {
map = new HashMap<>(initialCapacity);
GregTechAPI.sItemStackMappings.add(map);
}
GTHashSet(int initialCapacity, float loadFactor, boolean dummy) {
map = new LinkedHashMap<>(initialCapacity, loadFactor);
GregTechAPI.sItemStackMappings.add(map);
}
public Map<GTItemStack, Object> getMap() {
return map;
}
@SuppressWarnings("unchecked") // The downcasting below will throw ClassCastException unless E is GT_ItemStack.
@Override
public Iterator<E> iterator() {
return (Iterator<E>) map.keySet()
.iterator();
}
@Override
public int size() {
return map.size();
}
@Override
public boolean isEmpty() {
return map.isEmpty();
}
@Override
public boolean contains(Object o) {
return map.containsKey(o);
}
public boolean add(ItemStack aStack) {
if (GTUtility.isStackInvalid(aStack)) return false;
return map.put(new GTItemStack(aStack), OBJECT) == null;
}
@Override
public boolean add(E e) {
return map.put(e, OBJECT) == null;
}
@Override
public boolean remove(Object o) {
return map.remove(o) == OBJECT;
}
@Override
public void clear() {
map.clear();
}
}
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