Applied-Energistics-2-tilera-Edition/src/main/java/appeng/util/item/ItemList.java

/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2015, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Applied Energistics 2 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.util.item;

import java.util.*;
import java.util.concurrent.ConcurrentSkipListMap;

import appeng.api.config.FuzzyMode;
import appeng.api.storage.data.IAEItemStack;
import appeng.api.storage.data.IItemList;
import net.minecraftforge.oredict.OreDictionary;

public final class ItemList implements IItemList<IAEItemStack> {
    private final NavigableMap<IAEItemStack, IAEItemStack> records
        = new ConcurrentSkipListMap<IAEItemStack, IAEItemStack>();

    @Override
    public void add(final IAEItemStack option) {
        if (option == null) {
            return;
        }

        final IAEItemStack st = this.records.get(option);

        if (st != null) {
            st.add(option);
            return;
        }

        final IAEItemStack opt = option.copy();

        this.putItemRecord(opt);
    }

    @Override
    public IAEItemStack findPrecise(final IAEItemStack itemStack) {
        if (itemStack == null) {
            return null;
        }

        return this.records.get(itemStack);
    }

    @Override
    public Collection<IAEItemStack>
    findFuzzy(final IAEItemStack filter, final FuzzyMode fuzzy) {
        if (filter == null) {
            return Collections.emptyList();
        }

        final AEItemStack ais = (AEItemStack) filter;

        if (ais.isOre()) {
            final OreReference or = ais.getDefinition().getIsOre();

            if (or.getAEEquivalents().size() == 1) {
                final IAEItemStack is = or.getAEEquivalents().get(0);

                return this.findFuzzyDamage(
                    (AEItemStack) is,
                    fuzzy,
                    is.getItemDamage() == OreDictionary.WILDCARD_VALUE
                );
            } else {
                final Collection<IAEItemStack> output = new LinkedList<IAEItemStack>();

                for (final IAEItemStack is : or.getAEEquivalents()) {
                    output.addAll(this.findFuzzyDamage(
                        (AEItemStack) is,
                        fuzzy,
                        is.getItemDamage() == OreDictionary.WILDCARD_VALUE
                    ));
                }

                return output;
            }
        }

        return this.findFuzzyDamage(ais, fuzzy, false);
    }

    @Override
    public boolean isEmpty() {
        return !this.iterator().hasNext();
    }

    @Override
    public void addStorage(final IAEItemStack option) {
        if (option == null) {
            return;
        }

        final IAEItemStack st = this.records.get(option);

        if (st != null) {
            st.incStackSize(option.getStackSize());
            return;
        }

        final IAEItemStack opt = option.copy();

        this.putItemRecord(opt);
    }

    /*
     * public void clean() { Iterator<StackType> i = iterator(); while (i.hasNext()) {
     * StackType AEI = i.next(); if ( !AEI.isMeaningful() ) i.remove(); } }
     */

    @Override
    public void addCrafting(final IAEItemStack option) {
        if (option == null) {
            return;
        }

        final IAEItemStack st = this.records.get(option);

        if (st != null) {
            st.setCraftable(true);
            return;
        }

        final IAEItemStack opt = option.copy();
        opt.setStackSize(0);
        opt.setCraftable(true);

        this.putItemRecord(opt);
    }

    @Override
    public void addRequestable(final IAEItemStack option) {
        if (option == null) {
            return;
        }

        final IAEItemStack st = this.records.get(option);

        if (st != null) {
            st.setCountRequestable(
                st.getCountRequestable() + option.getCountRequestable()
            );
            return;
        }

        final IAEItemStack opt = option.copy();
        opt.setStackSize(0);
        opt.setCraftable(false);
        opt.setCountRequestable(option.getCountRequestable());

        this.putItemRecord(opt);
    }

    @Override
    public IAEItemStack getFirstItem() {
        for (final IAEItemStack stackType : this) {
            return stackType;
        }

        return null;
    }

    @Override
    public int size() {
        return this.records.size();
    }

    @Override
    public Iterator<IAEItemStack> iterator() {
        return new MeaningfulItemIterator<IAEItemStack>(this.records.values().iterator());
    }

    @Override
    public void resetStatus() {
        for (final IAEItemStack i : this) {
            i.reset();
        }
    }

    private IAEItemStack putItemRecord(final IAEItemStack itemStack) {
        return this.records.put(itemStack, itemStack);
    }

    private Collection<IAEItemStack> findFuzzyDamage(
        final AEItemStack filter, final FuzzyMode fuzzy, final boolean ignoreMeta
    ) {
        final IAEItemStack low = filter.getLow(fuzzy, ignoreMeta);
        final IAEItemStack high = filter.getHigh(fuzzy, ignoreMeta);

        return this.records.subMap(low, true, high, true).descendingMap().values();
    }
}