/**
 * A binary resource with the doLoad method is overridden for fixing a native bug with
 * set/no-set state.
 */
public class FixedBinaryResourceImpl extends XMIResourceImpl {
	/**
	 * Create a new RangeDB binary resource.
	 */
	public RangeDBBinaryResourceImpl() {
		super();
	}
	
	/**
	 * Create a new RangeDB binary resource with the given URI.
	 * @param uri resource URI
	 */
	public RangeDBBinaryResourceImpl(URI uri) {
		super(uri);
	}
	
	@Override
	protected void initResource() {
		super.initResource();
		
		getDefaultLoadOptions().put(XMLResource.OPTION_BINARY, true);
		getDefaultLoadOptions().put(XMLResource.OPTION_ZIP, true);
		
		getDefaultSaveOptions().put(XMLResource.OPTION_BINARY, true);
		getDefaultSaveOptions().put(XMLResource.OPTION_ZIP, true);
	}
	
	/**
	 * Code copied from {@link XMLResourceImpl} in order to support set/not-set
	 * state.
	 * @param inputStream stream to read
	 * @param options load options
	 * @throws IOException exception raised if a load problem occurs
	 */
	@Override
	public void doLoad(InputStream inputStream, Map<?, ?> options) throws IOException {
		if (inputStream instanceof URIConverter.Loadable) {
			((URIConverter.Loadable) inputStream).loadResource(this);
		} else if (options != null && Boolean.TRUE.equals(options.get(OPTION_BINARY))) {
			if (!(inputStream instanceof BufferedInputStream)) {
				int bufferCapacity = BinaryResourceImpl.getBufferCapacity(options);
				if (bufferCapacity > 0) {
					inputStream = new BufferedInputStream(inputStream, bufferCapacity);
				}
			}
			
			// FIX HERE: use the fixed EObjectInputStream class
			EObjectInputStream eObjectInputStream = new FixedEObjectInputStream(inputStream, options);
			ResourceHandler handler = (ResourceHandler) options.get(OPTION_RESOURCE_HANDLER);
			if (handler != null) {
				handler.preLoad(this, inputStream, options);
			}
			eObjectInputStream.loadResource(this);
			
			// Load the extrinsic ID map.
			//
			for (int i = 0, size = eObjectInputStream.readCompressedInt(); i < size; ++i) {
				setID(eObjectInputStream.loadEObject(), eObjectInputStream.readString());
			}
			
			if (handler != null) {
				handler.postLoad(this, inputStream, options);
			}
		} else {
			super.doLoad(inputStream, options);
		}
	}
	
	
	/**
	 * The default EObjectInputStream class has a problem which transform empty
	 * but set lists to empty not-set lists. To keep set or not-set state, this
	 * class has to be used. It has exactly the same behavior as its parent,
	 * excepted that this problem is fixed.
	 * 
	 * @author pelouas
	 */
	protected class FixedEObjectInputStream extends EObjectInputStream {
		/**
		 * Create a new EObjectInputStream.
		 * @param inputStream stream to read
		 * @param options load options
		 * @throws IOException exception if any problem occurs
		 */
		public FixedEObjectInputStream(InputStream inputStream, Map<?, ?> options) throws IOException {
			super(inputStream, options);
		}
		
		/*
		 * (non-Javadoc)
		 * 
		 * @see
		 * org.eclipse.emf.ecore.resource.impl.BinaryResourceImpl.EObjectInputStream
		 * #loadEObjects(org.eclipse.emf.ecore.util.InternalEList)
		 */
		@Override
		public void loadEObjects(InternalEList<InternalEObject> internalEObjects) throws IOException {
			super.loadEObjects(internalEObjects);
			
			// FIX HERE: ensure list is set even if empty
			if (internalEObjects.isEmpty()) {
				internalEObjects.clear();
			}
		}
	}
}