org.eclipse.xtext.util.PolymorphicDispatcher Java Examples

/** Construct the generator.
 */
public AbstractExtraLanguageGenerator() {
	this.beforeDispatcher = new PolymorphicDispatcher<Void>(
			"_before", 2, 2, //$NON-NLS-1$
			Collections.singletonList(this)) {
		@Override
		protected Void handleNoSuchMethod(Object... params) {
			return null;
		}
	};
	this.generateDispatcher = new PolymorphicDispatcher<>(
			"_generate", 2, 2, //$NON-NLS-1$
			Collections.singletonList(this));
	this.generateDispatcher2 = new PolymorphicDispatcher<>(
			"_generate", 3, 3, //$NON-NLS-1$
			Collections.singletonList(this));
	this.afterDispatcher = new PolymorphicDispatcher<Void>(
			"_after", 2, 2, //$NON-NLS-1$
			Collections.singletonList(this)) {
		@Override
		protected Void handleNoSuchMethod(Object... params) {
			return null;
		}
	};
}
 

protected IScope polymorphicFindScopeForReferenceName(EObject context, EReference reference) {
	Predicate<Method> predicate = getPredicate(context, reference);
	PolymorphicDispatcher<IScope> dispatcher = new PolymorphicDispatcher<IScope>(Collections
			.singletonList(this), predicate, errorHandler) {
		@Override
		protected IScope handleNoSuchMethod(Object... params) {
			if (PolymorphicDispatcher.NullErrorHandler.class.equals(errorHandler.getClass()))
				return null;
			return super.handleNoSuchMethod(params);
		}
	};
	EObject current = context;
	IScope scope = null;
	while (scope == null && current != null) {
		scope = dispatcher.invoke(current, reference);
		current = current.eContainer();
	}
	return scope;
}
 

protected String internalGetSignature(EObject object, boolean typeAtEnd) {
	PolymorphicDispatcher<String> polymorphicDispatcher = new PolymorphicDispatcher<String>("_signature", 2, 2,
			Collections.singletonList(this), new ErrorHandler<String>() {
				@Override
				public String handle(Object[] params, Throwable throwable) {
					return null;
				}
			});
	String result = polymorphicDispatcher.invoke(object, typeAtEnd);
	if (result != null)
		return result;
	if (object instanceof JvmIdentifiableElement) {
		return getLabel(object);
	}
	return getLabelForNonXbaseElement(object);
}
 

protected void invokeMethod(String methodName, ICompletionProposalAcceptor acceptor, Object... params) {
	PolymorphicDispatcher<Void> dispatcher = dispatchers.get(methodName);
	if (dispatcher == null) {
		ErrorHandler<Void> errorHandler = WarningErrorHandler.get(log);
		dispatcher = new PolymorphicDispatcher<Void>(methodName, params.length + 1, params.length + 1,
				Collections.singletonList(this), errorHandler) {
			@Override
			public Class<?> getDefaultClass(int paramIndex) {
				if (paramIndex == 0)
					return EObject.class;
				return super.getDefaultClass(paramIndex);
			}
		};
		dispatchers.put(methodName, dispatcher);
	}
	Object[] paramAsArray = new Object[params.length + 1];
	System.arraycopy(params, 0, paramAsArray, 0, params.length);
	paramAsArray[params.length] = acceptor;
	if (announceProcessing(Lists.asList(methodName, paramAsArray))) {
		dispatcher.invoke(paramAsArray);
	}
}
 

public Object execute(ArgumentExpression expression, ExecutionContext context) {
	Operation definition = getOperation(expression);
	List<Object> targets = callbacks;
	if (definition.eContainer() instanceof InterfaceScope) {
		String className = ((InterfaceScope) definition.eContainer()).getName();
		if (className != null) {
			targets = callbacks.stream().filter(c -> className.equals(c.getClass().getSimpleName()))
					.collect(Collectors.toList());
		}
	}
	PolymorphicDispatcher<Object> dispatcher = new PolymorphicDispatcher<Object>(definition.getName(),
			definition.getParameters().size(), definition.getParameters().size(),
			targets.size() > 0 ? targets : callbacks);
	try {
		return dispatcher.invoke(executeArguments(expression.getArguments(), context, definition));
	} catch (Exception ex) {
		throw new WrappedException("Error during invocation of operation '" + definition.getName()
				+ "' with params " + definition.getParameters() + " '", ex);
	}
}
 

public void initDispatcher(List<ITypeSystemInferrer> targets) {
	dispatcher = new PolymorphicDispatcher<Object>(METHOD_NAME, 1, 1, targets,
			new PolymorphicDispatcher.ErrorHandler<Object>() {
				@Override
				public Object handle(Object[] params, Throwable throwable) {
					if (throwable instanceof NoSuchMethodError) {
						warning(String.format(NO_INFER_METHOD, Arrays.toString(params)), NO_INFER_METHOD_CODE);
					} else {
						error(throwable.getMessage(), EXCEPTION_CODE);
					}
					return null;
				}
			});
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

protected void initDispatcher() {
	dispatcher = new PolymorphicDispatcher<Object>(METHOD_NAME, 1, 1, Collections.singletonList(this),
			new PolymorphicDispatcher.ErrorHandler<Object>() {
				@Override
				public Object handle(Object[] params, Throwable throwable) {
					if (throwable instanceof NoSuchMethodError) {
						warning("No infer method for type " + Arrays.toString(params));
					} else {
						error(throwable.getMessage());
					}
					return null;
				}
			});
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

/** Constructor.
 * @param delegate the original provider.
 */
@Inject
public SARLLabelProvider(AdapterFactoryLabelProvider delegate) {
	super(delegate);
	this.imageDescriptorDispatcher = new PolymorphicDispatcher<>(
			"imageDescriptor", //$NON-NLS-1$
			1, 1,
			Collections.singletonList(this),
			new ErrorHandler<ImageDescriptor>() {
				@Override
				public ImageDescriptor handle(Object[] params, Throwable exception) {
					return handleImageDescriptorError(params, exception);
				}
			});
}
 

/** Constructor.
 */
public SARLOperationHelper() {
	this.hasSideEffectsDispatcher = new PolymorphicDispatcher<Boolean>(
			"_hasSideEffects", 2, 2, //$NON-NLS-1$
			Collections.singletonList(this)) {
		@Override
		protected Boolean handleNoSuchMethod(Object... params) {
			return Boolean.FALSE;
		}
	};
}
 

/** Constructor.
 */
@SuppressWarnings("checkstyle:magicnumber")
public JavaInlineExpressionCompiler() {
	this.generateDispatcher = new PolymorphicDispatcher<Boolean>(
			"_generate", 4, 4, //$NON-NLS-1$
			Collections.singletonList(this)) {
		@Override
		protected Boolean handleNoSuchMethod(Object... params) {
			return Boolean.FALSE;
		}
	};
}
 

protected <T> PolymorphicDispatcher<T> buildPolymorphicDispatcher(
		final String methodName, int numOfArgs) {
	return new PatchedPolymorphicDispatcher<T>(
			Collections.singletonList(this), getPredicate(methodName,
					numOfArgs)) {
		@Override
		protected T handleNoSuchMethod(Object... params) {
			throw noSuchMethodException(methodName, params);
		}
	};
}
 

protected <T> PolymorphicDispatcher<Result<T>> buildPolymorphicDispatcher1(
		String methodName, int numOfArgs, final String judgmentSymbol,
		final String... relationSymbols) {
	return new PatchedPolymorphicDispatcher<Result<T>>(
			Collections.singletonList(this), getPredicate(methodName,
					numOfArgs)) {
		@Override
		protected Result<T> handleNoSuchMethod(Object... params) {
			throw noSuchMethodException(
					judgmentSymbol, Arrays.asList(relationSymbols),
					params);
		}
	};
}
 

protected <F, S> PolymorphicDispatcher<Result2<F, S>> buildPolymorphicDispatcher2(
		String methodName, int numOfArgs, final String judgmentSymbol,
		final String... relationSymbols) {
	return new PatchedPolymorphicDispatcher<Result2<F, S>>(
			Collections.singletonList(this), getPredicate(methodName,
					numOfArgs)) {
		@Override
		protected Result2<F, S> handleNoSuchMethod(
				Object... params) {
			throw noSuchMethodException(
					judgmentSymbol, Arrays.asList(relationSymbols),
					params);
		}
	};
}
 

protected <F, S, T> PolymorphicDispatcher<Result3<F, S, T>> buildPolymorphicDispatcher3(
		String methodName, int numOfArgs, final String judgmentSymbol,
		final String... relationSymbols) {
	return new PatchedPolymorphicDispatcher<Result3<F, S, T>>(
			Collections.singletonList(this), getPredicate(methodName,
					numOfArgs)) {
		@Override
		protected Result3<F, S, T> handleNoSuchMethod(
				Object... params) {
			throw noSuchMethodException(
					judgmentSymbol, Arrays.asList(relationSymbols),
					params);
		}
	};
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}
 

@Override
protected Collection<FollowElement> getFollowElements(AbstractInternalContentAssistParser parser) {
	if (rule == null || rule.eIsProxy())
		return Collections.emptyList();
	String methodName = "entryRule" + rule.getName();
	PolymorphicDispatcher<Collection<FollowElement>> dispatcher = 
		new PolymorphicDispatcher<Collection<FollowElement>>(methodName, 0, 0, Collections.singletonList(parser));
	dispatcher.invoke();
	return parser.getFollowElements();
}