215 lines
5.6 KiB
Java
215 lines
5.6 KiB
Java
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013 AlgorithmX2
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package appeng.api.storage;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map.Entry;
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import appeng.api.config.AccessRestriction;
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import appeng.api.config.Actionable;
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import appeng.api.networking.security.BaseActionSource;
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import appeng.api.storage.data.IAEStack;
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import appeng.api.storage.data.IItemList;
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import com.google.common.collect.ImmutableList;
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/**
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* Common implementation of a simple class that monitors injection/extraction of a inventory to send events to a list of
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* listeners.
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*
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* @param <StackType>
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*/
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public class MEMonitorHandler<StackType extends IAEStack> implements IMEMonitor<StackType>
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{
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private final IMEInventoryHandler<StackType> internalHandler;
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private final IItemList<StackType> cachedList;
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private final HashMap<IMEMonitorHandlerReceiver<StackType>, Object> listeners = new HashMap<IMEMonitorHandlerReceiver<StackType>, Object>();
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protected boolean hasChanged = true;
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public MEMonitorHandler( IMEInventoryHandler<StackType> t )
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{
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this.internalHandler = t;
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this.cachedList = t.getChannel().createList();
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}
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public MEMonitorHandler( IMEInventoryHandler<StackType> t, StorageChannel chan )
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{
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this.internalHandler = t;
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this.cachedList = chan.createList();
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}
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@Override
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public void addListener( IMEMonitorHandlerReceiver<StackType> l, Object verificationToken )
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{
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this.listeners.put( l, verificationToken );
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}
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@Override
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public void removeListener( IMEMonitorHandlerReceiver<StackType> l )
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{
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this.listeners.remove( l );
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}
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@Override
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public StackType injectItems( StackType input, Actionable mode, BaseActionSource src )
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{
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if( mode == Actionable.SIMULATE )
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{
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return this.getHandler().injectItems( input, mode, src );
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}
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return this.monitorDifference( input.copy(), this.getHandler().injectItems( input, mode, src ), false, src );
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}
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protected IMEInventoryHandler<StackType> getHandler()
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{
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return this.internalHandler;
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}
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private StackType monitorDifference( IAEStack original, StackType leftOvers, boolean extraction, BaseActionSource src )
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{
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StackType diff = (StackType) original.copy();
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if( extraction )
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{
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diff.setStackSize( leftOvers == null ? 0 : -leftOvers.getStackSize() );
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}
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else if( leftOvers != null )
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{
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diff.decStackSize( leftOvers.getStackSize() );
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}
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if( diff.getStackSize() != 0 )
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{
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this.postChangesToListeners( ImmutableList.of( diff ), src );
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}
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return leftOvers;
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}
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protected void postChangesToListeners( Iterable<StackType> changes, BaseActionSource src )
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{
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this.notifyListenersOfChange( changes, src );
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}
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protected void notifyListenersOfChange( Iterable<StackType> diff, BaseActionSource src )
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{
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this.hasChanged = true;// need to update the cache.
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Iterator<Entry<IMEMonitorHandlerReceiver<StackType>, Object>> i = this.getListeners();
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while( i.hasNext() )
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{
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Entry<IMEMonitorHandlerReceiver<StackType>, Object> o = i.next();
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IMEMonitorHandlerReceiver<StackType> receiver = o.getKey();
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if( receiver.isValid( o.getValue() ) )
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{
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receiver.postChange( this, diff, src );
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}
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else
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{
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i.remove();
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}
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}
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}
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protected Iterator<Entry<IMEMonitorHandlerReceiver<StackType>, Object>> getListeners()
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{
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return this.listeners.entrySet().iterator();
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}
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@Override
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public StackType extractItems( StackType request, Actionable mode, BaseActionSource src )
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{
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if( mode == Actionable.SIMULATE )
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{
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return this.getHandler().extractItems( request, mode, src );
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}
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return this.monitorDifference( request.copy(), this.getHandler().extractItems( request, mode, src ), true, src );
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}
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@Override
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public StorageChannel getChannel()
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{
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return this.getHandler().getChannel();
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}
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@Override
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public AccessRestriction getAccess()
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{
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return this.getHandler().getAccess();
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} @Override
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public IItemList<StackType> getStorageList()
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{
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if( this.hasChanged )
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{
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this.hasChanged = false;
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this.cachedList.resetStatus();
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return this.getAvailableItems( this.cachedList );
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}
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return this.cachedList;
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}
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@Override
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public boolean isPrioritized( StackType input )
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{
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return this.getHandler().isPrioritized( input );
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}
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@Override
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public boolean canAccept( StackType input )
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{
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return this.getHandler().canAccept( input );
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} @Override
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public IItemList<StackType> getAvailableItems( IItemList out )
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{
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return this.getHandler().getAvailableItems( out );
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}
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@Override
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public int getPriority()
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{
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return this.getHandler().getPriority();
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}
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@Override
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public int getSlot()
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{
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return this.getHandler().getSlot();
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}
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@Override
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public boolean validForPass( int i )
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{
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return this.getHandler().validForPass( i );
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}
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}
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