Example usage for java.lang.reflect Method getReturnType

Introduction

In this page you can find the example usage for java.lang.reflect Method getReturnType.

Prototype

public Class<?> getReturnType() 

Source Link

Document

Returns a Class object that represents the formal return type of the method represented by this Method object.

Usage

From source file:it.sample.parser.util.CommonsUtil.java

/**
 * Metodo di utilita' per controllare che un'istanza di una classe abbia almeno un campo valorizzato
 * /*from w w w.jav a  2s . c o  m*/
 * @param instance
 * @return true se l'istanza ha almeno un campo valorizzato, false altrimenti
 */
public static <T> boolean isFilled(T instance) {
    boolean isFilled = false;
    Method[] methods = instance != null ? instance.getClass().getMethods() : new Method[] {};
    for (Method method : methods) {
        if (isGetter(method)) {
            Class<?> returnType = method.getReturnType();
            Object obj = null;
            try {
                obj = method.invoke(instance, new Object[] {});
                if (obj != null
                        && (returnType.getSimpleName().equals("String") && obj.toString().length() > 0)) {
                    isFilled = true;
                    break;
                }
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
        }
    }
    return isFilled;
}

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From source file:unquietcode.tools.beanmachine.AnnotationUtils.java

/**
 * Retrieve the given annotation's attributes as a Map.
 * @param annotation the annotation to retrieve the attributes for
 * @param classValuesAsString whether to turn Class references into Strings (for compatibility with
 * {@link org.springframework.core.type.AnnotationMetadata} or to preserve them as Class references
 * @return the Map of annotation attributes, with attribute names as keys and
 * corresponding attribute values as values
 *//*from  w ww . jav  a2 s . co m*/
public static Map<String, Object> getAnnotationAttributes(Annotation annotation, boolean classValuesAsString) {
    Map<String, Object> attrs = new HashMap<String, Object>();
    Method[] methods = annotation.annotationType().getDeclaredMethods();
    for (Method method : methods) {
        if (method.getParameterTypes().length == 0 && method.getReturnType() != void.class) {
            try {
                Object value = method.invoke(annotation);
                if (classValuesAsString) {
                    if (value instanceof Class) {
                        value = ((Class) value).getName();
                    } else if (value instanceof Class[]) {
                        Class[] clazzArray = (Class[]) value;
                        String[] newValue = new String[clazzArray.length];
                        for (int i = 0; i < clazzArray.length; i++) {
                            newValue[i] = clazzArray[i].getName();
                        }
                        value = newValue;
                    }
                }
                attrs.put(method.getName(), value);
            } catch (Exception ex) {
                throw new IllegalStateException("Could not obtain annotation attribute values", ex);
            }
        }
    }
    return attrs;
}

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From source file:com.diversityarrays.kdxplore.stats.StatsUtil.java

public static Class<?> getValueClass(SimpleStatistics.StatName statName) {
    Method method = METHOD_BY_STATNAME.get(statName);
    return method.getReturnType();
}

---

From source file:org.zht.framework.util.ZBeanUtil.java

private static void copy(Object source, Object target, Boolean ignorNull, Class<?> editable,
        String... ignoreProperties) throws BeansException {

    Assert.notNull(source, "Source must not be null");
    Assert.notNull(target, "Target must not be null");

    Class<?> actualEditable = target.getClass();
    if (editable != null) {
        if (!editable.isInstance(target)) {
            throw new IllegalArgumentException("Target class [" + target.getClass().getName()
                    + "] not assignable to Editable class [" + editable.getName() + "]");
        }//from w  ww  .j  av a  2 s .c o m
        actualEditable = editable;
    }
    PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
    List<String> ignoreList = (ignoreProperties != null ? Arrays.asList(ignoreProperties) : null);

    for (PropertyDescriptor targetPd : targetPds) {
        Method writeMethod = targetPd.getWriteMethod();
        if (writeMethod != null && (ignoreList == null || !ignoreList.contains(targetPd.getName()))) {
            PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());
            if (sourcePd != null) {
                Method readMethod = sourcePd.getReadMethod();
                if (readMethod != null && ClassUtils.isAssignable(writeMethod.getParameterTypes()[0],
                        readMethod.getReturnType())) {
                    try {
                        if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
                            readMethod.setAccessible(true);
                        }
                        Object value = readMethod.invoke(source);
                        if (ignorNull != null && ignorNull) {
                            if (value != null && (!"[]".equals(value.toString()))) {// ?
                                if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
                                    writeMethod.setAccessible(true);
                                }
                                writeMethod.invoke(target, value);
                            }
                        } else {
                            if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
                                writeMethod.setAccessible(true);
                            }
                            writeMethod.invoke(target, value);
                        }

                    } catch (Throwable ex) {
                        throw new FatalBeanException(
                                "Could not copy property '" + targetPd.getName() + "' from source to target",
                                ex);
                    }
                }
            }
        }
    }
}

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From source file:cat.albirar.framework.dynabean.impl.DynaBeanImplementationUtils.java

/**
 * Comprova que el mtode representa una propietat correcta. Un propietat correcta s:
 * <ul>/*from   www.j av  a  2 s. c  o m*/
 * <li>Un {@link #isSetter(String) mtode set} amb arguments i sense retorn</li>
 * <li>Un {@link #isGetter(String) mtode get} sense arguments i amb retorn diferent de 'void'.</li>
 * <li>Un {@link #isGetterBoolean(String) mtode 'is'} sense arguments i amb retorn 'boolean'.</li>
 * </ul>
 * 
 * @param method El mtode
 * @return true si s correcta i false en cas contrari
 */
public static final boolean isCorrectProperty(Method method) {
    if (isGetter(method.getName())) {
        if (isGetterBoolean(method.getName())) {
            return (method.getParameterTypes().length == 0 && method.getReturnType().equals(boolean.class));
        }
        return (!method.getReturnType().equals(void.class) && method.getParameterTypes().length == 0);
    } else {
        return (method.getParameterTypes().length == 1 && method.getReturnType().equals(void.class));
    }
}

---

From source file:com.msopentech.odatajclient.plugin.Utility.java

public static Map.Entry<String, String> getDocumentation(final Object obj) {
    final String summary;
    final String description;

    try {/*from  ww  w .  j  a v  a  2  s. co  m*/
        final Method method = obj.getClass().getMethod("getDocumentation");

        if (method == null || method.getReturnType() != Documentation.class) {
            throw new Exception("Documentation not found");
        }

        final Documentation doc = (Documentation) method.invoke(obj);

        summary = doc.getSummary() == null ? "" : doc.getSummary();
        description = doc.getLongDescription() == null ? "" : doc.getLongDescription();

        return new AbstractMap.SimpleEntry<String, String>(summary, description);
    } catch (Exception e) {
        return null;
    }

}

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From source file:org.synyx.hades.util.ClassUtils.java

/**
 * Asserts the given {@link Method}'s return type to be one of the given
 * types./*from   w  ww  . jav a 2 s  . c  o  m*/
 * 
 * @param method
 * @param types
 */
public static void assertReturnType(Method method, Class<?>... types) {

    if (!Arrays.asList(types).contains(method.getReturnType())) {
        throw new IllegalStateException(
                "Method has to have one of the following return types! " + Arrays.toString(types));
    }
}

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From source file:kelly.util.BeanUtils.java

/**
 * Copy the property values of the given source bean into the given target bean.
 * <p>Note: The source and target classes do not have to match or even be derived
 * from each other, as long as the properties match. Any bean properties that the
 * source bean exposes but the target bean does not will silently be ignored.
 * @param source the source bean/*from   w  ww .j  a  va  2s  . c  o  m*/
 * @param target the target bean
 * @param editable the class (or interface) to restrict property setting to
 * @param ignoreProperties array of property names to ignore
 * @throws BeansException if the copying failed
 * @see BeanWrapper
 */
private static void copyProperties(Object source, Object target, Class<?> editable,
        String... ignoreProperties) {

    Validate.notNull(source, "Source must not be null");
    Validate.notNull(target, "Target must not be null");

    Class<?> actualEditable = target.getClass();
    if (editable != null) {
        if (!editable.isInstance(target)) {
            throw new IllegalArgumentException("Target class [" + target.getClass().getName()
                    + "] not assignable to Editable class [" + editable.getName() + "]");
        }
        actualEditable = editable;
    }
    PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
    List<String> ignoreList = (ignoreProperties != null) ? Arrays.asList(ignoreProperties) : null;

    for (PropertyDescriptor targetPd : targetPds) {
        Method writeMethod = targetPd.getWriteMethod();
        if (writeMethod != null && (ignoreProperties == null || (!ignoreList.contains(targetPd.getName())))) {
            PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());
            if (sourcePd != null) {
                Method readMethod = sourcePd.getReadMethod();
                if (readMethod != null
                        && writeMethod.getParameterTypes()[0].isAssignableFrom(readMethod.getReturnType())) {
                    try {
                        if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
                            readMethod.setAccessible(true);
                        }
                        Object value = readMethod.invoke(source);
                        if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
                            writeMethod.setAccessible(true);
                        }
                        writeMethod.invoke(target, value);
                    } catch (Throwable ex) {
                        throw new BeanException(
                                "Could not copy property '" + targetPd.getName() + "' from source to target",
                                ex);
                    }
                }
            }
        }
    }
}

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From source file:dk.netdesign.common.osgi.config.Attribute.java

private static Class getMethodReturnType(Method classMethod) throws InvalidMethodException {
    Class methodReturnType = classMethod.getReturnType();
    if (classMethod.isAnnotationPresent(Property.class)) {
        Property methodProperty = classMethod.getAnnotation(Property.class);
        if (List.class.isAssignableFrom(methodReturnType) && methodProperty.type() == void.class) {
            throw new InvalidMethodException("Could not create handler for method " + classMethod.getName()
                    + ". Lists must be accompanied by a returnType");
        }//w ww . j  a v a  2s .  c  o m
    }
    return methodReturnType;
}

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From source file:ch.digitalfondue.npjt.QueryType.java

private static boolean isReturnOptional(Method method) {
    try {//  w  ww.  j  a  v a  2  s.co m
        return optionalAvailable
                && method.getReturnType().isAssignableFrom(Class.forName("java.util.Optional"));
    } catch (ClassNotFoundException e) {
        return false;
    }
}

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