thatsIch
97 lines
2.1 KiB
Java
97 lines
2.1 KiB
Java
/*
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* This file is part of Applied Energistics 2.
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* Copyright (c) 2013 - 2015, AlgorithmX2, All rights reserved.
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*
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* Applied Energistics 2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Applied Energistics 2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Applied Energistics 2. If not, see <http://www.gnu.org/licenses/lgpl>.
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*/
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package appeng.util.item;
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import java.util.Iterator;
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import java.util.NavigableMap;
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import java.util.NoSuchElementException;
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import appeng.api.storage.data.IAEItemStack;
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public class MeaningfulItemIterator<T extends IAEItemStack> implements Iterator<T>
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{
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private final Iterator<NavigableMap<T, T>> parent;
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private Iterator<T> innerIterater = null;
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private T next;
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public MeaningfulItemIterator( final Iterator<NavigableMap<T, T>> iterator )
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{
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this.parent = iterator;
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if( this.parent.hasNext() )
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{
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this.innerIterater = this.parent.next().values().iterator();
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}
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}
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@Override
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public boolean hasNext()
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{
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if( this.innerIterater == null )
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{
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return false;
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}
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while( this.innerIterater.hasNext() || this.parent.hasNext() )
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{
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if( this.innerIterater.hasNext() )
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{
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this.next = this.innerIterater.next();
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if( this.next.isMeaningful() )
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{
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return true;
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}
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else
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{
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this.innerIterater.remove(); // self cleaning :3
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}
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}
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if( this.parent.hasNext() )
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{
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this.innerIterater = this.parent.next().values().iterator();
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}
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}
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this.next = null;
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return false;
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}
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@Override
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public T next()
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{
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if( this.next == null )
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{
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throw new NoSuchElementException();
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}
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return this.next;
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}
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@Override
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public void remove()
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{
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this.parent.remove();
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}
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}
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