org.codehaus.groovy.runtime.MethodClosure Java Examples

@Override
public void sendExceptionReport(String supportEmail, Map<String, Object> binding) {
    try {
        Map<String, Object> map = new HashMap<>(binding);
        User user = userSessionSource.getUserSession().getUser();
        map.put("user", user);
        map.put("toHtml", new MethodClosure(HtmlUtils.class, "convertToHtml"));

        String body = getExceptionReportBody(map);
        String subject = getExceptionReportSubject(map);

        EmailInfo info = EmailInfoBuilder.create()
                .setAddresses(supportEmail)
                .setCaption(subject)
                .setBody(body)
                .build();

        emailer.sendEmail(info);
    } catch (Exception e) {
        log.error("Error sending exception report", e);
        throw new RuntimeException("Error sending exception report");
    }
}
 

private Map<String, Object> wrap(final Map<String, Object> model) {
    return new HashMap<String, Object>(model) {
        @Override
        public Object get(final Object property) {
            if (property instanceof String || property instanceof GString) {
                String key = property.toString();
                if ("include".equals(key)) {
                    return new MethodClosure(GroovyTemplateEngine.this, "doInclude").curry(this);
                }
                try {
                    return extractors.extractAndTransform(db, key, model, new TemplateEngineAdapter.NoopAdapter());
                } catch (NoModelExtractorException e) {
                    // fallback to parent model
                }
            }

            return super.get(property);
        }
    };
}
 

protected void addFunctionClosureMethods(MethodClosure methodClosure, String functionName)
{
	// calling registerInstanceMethod(String, Closure) would register all methods, but we only want public methods
	List<MetaMethod> closureMethods = ClosureMetaMethod.createMethodList(functionName, getClass(), methodClosure);
	for (MetaMethod metaMethod : closureMethods)
	{
		if (!(metaMethod instanceof ClosureMetaMethod))
		{
			// should not happen
			log.warn("Got unexpected closure method " + metaMethod + " of type " + metaMethod.getClass().getName());
			continue;
		}
		
		ClosureMetaMethod closureMethod = (ClosureMetaMethod) metaMethod;
		if (!closureMethod.getDoCall().isPublic())
		{
			if (log.isDebugEnabled())
			{
				log.debug("method " + closureMethod.getDoCall() + " is not public, not registering");
			}
			continue;
		}
		
		if (log.isDebugEnabled())
		{
			log.debug("creating closure method for " + closureMethod.getDoCall());
		}
		
		functionMethods.add(closureMethod);
	}
}
 

protected Object runGroovyScript(Entity entity, String groovyScript) {
    Map<String, Object> context = new HashMap<>();
    context.put("__entity__", entity);
    context.put("parse", new MethodClosure(this, "parseValue"));
    context.put("userSession", userSessionSource.getUserSession());
    fillGroovyConstraintsContext(context);
    return scripting.evaluateGroovy(groovyScript.replace("{E}", "__entity__"), context);
}
 

public static Collection asCollection(Object value) {
    if (value == null) {
        return Collections.EMPTY_LIST;
    } else if (value instanceof Collection) {
        return (Collection) value;
    } else if (value instanceof Map) {
        Map map = (Map) value;
        return map.entrySet();
    } else if (value.getClass().isArray()) {
        return arrayAsCollection(value);
    } else if (value instanceof MethodClosure) {
        MethodClosure method = (MethodClosure) value;
        IteratorClosureAdapter adapter = new IteratorClosureAdapter(method.getDelegate());
        method.call(adapter);
        return adapter.asList();
    } else if (value instanceof String || value instanceof GString) {
        return StringGroovyMethods.toList((CharSequence) value);
    } else if (value instanceof File) {
        try {
            return ResourceGroovyMethods.readLines((File) value);
        } catch (IOException e) {
            throw new GroovyRuntimeException("Error reading file: " + value, e);
        }
    } else if (value instanceof Class && ((Class) value).isEnum()) {
        Object[] values = (Object[]) InvokerHelper.invokeMethod(value, "values", EMPTY_OBJECT_ARRAY);
        return Arrays.asList(values);
    } else {
        // let's assume it's a collection of 1
        return Collections.singletonList(value);
    }
}
 

/**
 * When a method is not found in the current script, checks that it's possible to call a method closure from the binding.
 *
 * @throws IOException
 * @throws CompilationFailedException
 * @throws IllegalAccessException
 * @throws InstantiationException
 */
public void testInvokeMethodFallsThroughToMethodClosureInBinding() throws IOException, CompilationFailedException, IllegalAccessException, InstantiationException {
    String text = "if (method() == 3) { println 'succeeded' }";

    GroovyCodeSource codeSource = new GroovyCodeSource(text, "groovy.script", "groovy.script");
    GroovyClassLoader loader = new GroovyClassLoader(Thread.currentThread().getContextClassLoader());
    Class clazz = loader.parseClass(codeSource);
    Script script = ((Script) clazz.newInstance());

    Binding binding = new Binding();
    binding.setVariable("method", new MethodClosure(new Dummy(), "method"));
    script.setBinding(binding);

    script.run();
}
 

@Override
public Component getComponent(int width, int height) throws IOException {
	final Component comp = super.getComponent(width, height);
	binding.setVariable("w2v", new MethodClosure(this, "w2v"));
	binding.setVariable("v2w", new MethodClosure(this, "v2w"));
	binding.setVariable("nn", new MethodClosure(this, "nn"));
	binding.setVariable("help", new MethodClosure(this, "help"));

	return comp;
}
 

private Object invokeMethodClosure(Object object, Object[] arguments) {
    final MethodClosure mc = (MethodClosure) object;
    final Object owner = mc.getOwner();

    String methodName = mc.getMethod();
    final Class ownerClass = owner instanceof Class ? (Class) owner : owner.getClass();
    final MetaClass ownerMetaClass = registry.getMetaClass(ownerClass);

    // To conform to "Least Surprise" principle, try to invoke method with original arguments first, which can match most of use cases
    try {
        return ownerMetaClass.invokeMethod(ownerClass, owner, methodName, arguments, false, false);
    } catch (MissingMethodExceptionNoStack | InvokerInvocationException e) {
        // CONSTRUCTOR REFERENCE
        if (owner instanceof Class && MethodClosure.NEW.equals(methodName)) {
            if (ownerClass.isArray()) {
                if (0 == arguments.length) {
                    throw new GroovyRuntimeException("The arguments(specifying size) are required to create array[" + ownerClass.getCanonicalName() + "]");
                }

                int arrayDimension = ArrayTypeUtils.dimension(ownerClass);

                if (arguments.length > arrayDimension) {
                    throw new GroovyRuntimeException("The length[" + arguments.length + "] of arguments should not be greater than the dimensions[" + arrayDimension + "] of array[" + ownerClass.getCanonicalName() + "]");
                }

                int[] sizeArray = new int[arguments.length];

                for (int i = 0, n = sizeArray.length; i < n; i++) {
                    Object argument = arguments[i];

                    if (argument instanceof Integer) {
                        sizeArray[i] = (Integer) argument;
                    } else {
                        sizeArray[i] = Integer.parseInt(String.valueOf(argument));
                    }
                }

                Class arrayType =
                        arguments.length == arrayDimension
                                ? ArrayTypeUtils.elementType(ownerClass) // Just for better performance, though we can use reduceDimension only
                                : ArrayTypeUtils.elementType(ownerClass, (arrayDimension - arguments.length));
                return Array.newInstance(arrayType, sizeArray);
            }

            return ownerMetaClass.invokeConstructor(arguments);
        }

        // METHOD REFERENCE
        // if and only if the owner is a class and the method closure can be related to some instance methods,
        // try to invoke method with adjusted arguments(first argument is the actual owner) again.
        // otherwise throw the MissingMethodExceptionNoStack.
        if (!(owner instanceof Class
                && (Boolean) mc.getProperty(MethodClosure.ANY_INSTANCE_METHOD_EXISTS))) {

            throw e;
        }

        if (arguments.length <= 0 || !(arguments[0].getClass().equals(ownerClass))) {
            return invokeMissingMethod(object, methodName, arguments);
        }

        Object newOwner = arguments[0];
        Object[] newArguments = Arrays.copyOfRange(arguments, 1, arguments.length);
        return ownerMetaClass.invokeMethod(ownerClass, newOwner, methodName, newArguments, false, false);
    }
}
 

public MethodClosure createMethodClosure() {
    return new MethodClosure(this, "someMethod");
}
 

public void installInterceptors() {
	systemOutInterceptor = new SystemOutputInterceptor(new MethodClosure(this, "notifySystemOut"), true);
	systemOutInterceptor.start();
	systemErrorInterceptor = new SystemOutputInterceptor(new MethodClosure(this, "notifySystemErr"), false);
	systemErrorInterceptor.start();
}
 

/**
 * @deprecated since 0.11.0; explicit groovy utilities/support will be deleted.
 */
@Deprecated
public MethodEffector(MethodClosure mc) {
    this(new AnnotationsOnMethod((Class<?>)mc.getDelegate(), mc.getMethod()), null);
}
 

public Object methodPointer(Object lhs, String name) {
    return new MethodClosure(lhs, name);
}
 

@SuppressWarnings("unchecked")
public static void interact(MethodClosure function, Object... parameters) {

  final List<ValueWidget<?>> widgets = widgetsFromAbbreviations(parameters);

  for (ValueWidget<?> widget : widgets) {
    widget.getComm().addMsgCallbackList(widget.new ValueChangeMsgCallbackHandler() {

      private void processCode(Object... params) throws Exception {
        Object call = function.call(getWidgetValues());
        if (call instanceof String || call instanceof Number) {
          label.setValue(call);
        }
      }

      @Override
      public void updateValue(Object value, Message message) {
        try {
          processCode();
        } catch (Exception e) {
          throw new IllegalStateException("Error occurred during updating interactive widget.", e);
        }
      }

      private Object[] getWidgetValues() {
        List<Object> ret = new ArrayList<>(widgets.size());
        for (ValueWidget<?> wid : widgets) {
          ret.add(wid.getValue());
        }
        return ret.toArray(new Object[ret.size()]);
      }

    });
    logger.info("interact Widget: " + widget.getClass().getName());
  }

  widgets.forEach(Widget::display);
  Object response = function.call(widgets.stream().map(ValueWidget::getValue).toArray());
  if (response instanceof Widget) {
    ((Widget) response).display();
  } else {
    label = new Label();
    label.setValue(response);
    label.display();
  }
}
 

public InvocationHandler getObject(CmdExecuteHelper cmdHelper) throws Exception {
	final ConvertedClosure closure = new ConvertedClosure(new MethodClosure(cmdHelper.getCommand(), "execute"), "entrySet");
	
	final Map map = Gadgets.createProxy(closure, Map.class);		

	final InvocationHandler handler = Gadgets.createMemoizedInvocationHandler(map);
	
	return handler;
}
 

public InvocationHandler getObject(final String command) throws Exception {
	final ConvertedClosure closure = new ConvertedClosure(new MethodClosure(command, "execute"), "entrySet");
	
	final Map map = Gadgets.createProxy(closure, Map.class);		

	final InvocationHandler handler = Gadgets.createMemoizedInvocationHandler(map);
	
	return handler;
}
 

public InvocationHandler getObject(final String command) throws Exception {
	final ConvertedClosure closure = new ConvertedClosure(new MethodClosure(command, "execute"), "entrySet");

	final Map map = Gadgets.createProxy(closure, Map.class);

	final InvocationHandler handler = Gadgets.createMemoizedInvocationHandler(map);

	return handler;
}