Examples of java.lang.reflect.Method

java.lang.reflect.Method
A Method provides information about, and access to, a single method on a class or interface. The reflected method may be a class method or an instance method (including an abstract method).
A Method permits widening conversions to occur when matching the actual parameters to invoke with the underlying method's formal parameters, but it throws an IllegalArgumentException if a narrowing conversion would occur. @see Member @see java.lang.Class @see java.lang.Class#getMethods() @see java.lang.Class#getMethod(String,Class[]) @see java.lang.Class#getDeclaredMethods() @see java.lang.Class#getDeclaredMethod(String,Class[]) @author Kenneth Russell @author Nakul Saraiya


    try
    {
      BadlyTypedValidatorForm bean = new BadlyTypedValidatorForm();


      Method method = bean.getClass().getMethod("getRequiredInteger");
      MaxLengthValidator validator = new MaxLengthValidator();


      ValidationAnnotationReader reader = new ValidationAnnotationReader();
      reader.checkValidatorType("propertyName", method, validator.getClass(), Validator.class,
          ValidateInteger.class);

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 */
public abstract class BaseSampleBeanFactory implements BeanFactory {


  protected static void setCreatedByFactoryName(Object target, String name) {
    try {
      Method method = target.getClass().getMethod("setCreatedByFactoryName", new Class[] { String.class });
      method.invoke(target, new Object[] { name });
    } catch (Exception e) {
      // this object is only used for unit testing so do a catch all for ease of use
    }
  }

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        furnitureLibraryEditorBootstrapClass.getProtectionDomain(),
        extensionJarsAndDlls.toArray(new String [extensionJarsAndDlls.size()]), applicationPackages);  
    
    String applicationClassName = "com.eteks.furniturelibraryeditor.FurnitureLibraryEditor";
    Class<?> applicationClass = java3DClassLoader.loadClass(applicationClassName);
    Method applicationClassMain = 
        applicationClass.getMethod("main", Array.newInstance(String.class, 0).getClass());
    // Call application class main method with reflection
    applicationClassMain.invoke(null, new Object [] {args});
  }

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  public void testInitMethod() throws Exception
  {
    LifecycleMethodReader c = new LifecycleMethodReader();
    ActionWithLifecycleMethods actionBean = new ActionWithLifecycleMethods();
    c.readAnnotations(actionBean.getClass());
    final Method initMethod = c.getInitMethod();


    SimpleControllerAction action = new SimpleControllerAction();
    action.setInitMethod(initMethod);


    action.doInitMethod(actionBean);

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  public void testCloseMethod() throws Exception
  {
    LifecycleMethodReader c = new LifecycleMethodReader();
    ActionWithLifecycleMethods actionBean = new ActionWithLifecycleMethods();
    c.readAnnotations(actionBean.getClass());
    final Method closeMethod = c.getCloseMethod();


    SimpleControllerAction action = new SimpleControllerAction();
    action.setCloseMethod(closeMethod);


    action.doCloseMethod(actionBean);

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        int idColumn = -1;
        int counter = 0;


        for (String column : firstLine.split(columnSeparator)) {
            column = column.trim();
            Method method = setterMethods.get(column);


            if (method == null)
                continue;


            Class[] params = method.getParameterTypes();
            if (params.length != 1) {
                logger.warn("Setter method " + method.getName() + " should have one parameter!");
                continue;
            }
            Parsing parsing = objParsing.getParsing(params[0]);


            if (parsing == null) {

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  public Method getMethod(Object actionBean, String methodName)
  {
    synchronized (methods)
    {
      Method method = methods.get(methodName);
      if (method == null)
      {
        method = ReflectHelper.getMethod(actionBean, methodName);
        methods.put(methodName, method);
      }

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    }


    private Element writeElements(Element element, Object object, String... properties) {
        Map<String, Method> methods = Helper.findGetterMethods(object.getClass());
        for (String property : properties) {
            Method m = methods.get(property);
            try {
                if (m == null)
                    throw new IllegalStateException("No getter found for " + property);


                Object result = m.invoke(object);
                if (result != null) {
                    Writing writing = getWriting(m.getReturnType());
                    if (writing == null)
                        throw new UnsupportedOperationException("No writing found for " + m.getReturnType());


                    element.addElement(property).setText(writing.toString(result));
                }
            } catch (Exception ex) {
                throw new RuntimeException("exception while writing "

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    private Element readElements(Element rootElement, Object object) {
        Map<String, Method> methods = Helper.findSetterMethods(object.getClass());
        for (Object objectEl : rootElement.elements()) {
            Element element = (Element) objectEl;
            Method m = methods.get(element.getName());
            if (m == null)
                throw new NullPointerException("Cannot find setter for element:" + element.getName());
            try {
                Class setterType = m.getParameterTypes()[0];
                Object result = getResult(object, setterType, element);
                m.invoke(object, result);
            } catch (Exception ex) {
                throw new RuntimeException("Exception while parsing ("
                        + element.getName() + ") to "
                        + object.getClass().getName() + " " + object, ex);
            }

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        Map<String, Method> setterMapping = new TreeMap();
        fillSettersAndGetters(obj.getClass(), setterMapping, getterMapping);


        getterMapping.keySet().retainAll(setterMapping.keySet());
        for (Entry<String, Method> getter : getterMapping.entrySet()) {
            Method setter = setterMapping.get(getter.getKey());


            // getter object should be castable to setter type:
            if (!setter.getParameterTypes()[0].isAssignableFrom(
                    getter.getValue().getReturnType()))
                continue;


            try {
                Object param = getter.getValue().invoke(obj);


                if (getter.getValue().getReturnType().isArray()) {
                    param = ((Object[]) param).clone();
                } else if (Collection.class.isAssignableFrom(getter.getValue().getReturnType())) {
                    param = new HashSet((Collection) param);
                } else if (Map.class.isAssignableFrom(getter.getValue().getReturnType())) {
                    param = new HashMap((Map) param);
                }


                setter.invoke(newObj, param);
            } catch (Exception ex) {
                logger.fatal("Cannot set:" + getter.getKey(), ex);
            }
        }
    }

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