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:Main.java

/**
 * Convenience method for obtaining most non-null human readable properties of a JComponent. Array properties are not included.
 * <P>//  w  ww .j av  a 2s  .  c o m
 * Implementation note: The returned value is a HashMap. This is subject to change, so callers should code against the interface Map.
 * 
 * @param component
 *            the component whose proerties are to be determined
 * @return the class and value of the properties
 */
public static Map<Object, Object> getProperties(JComponent component) {
    Map<Object, Object> retVal = new HashMap<>();
    Class<?> clazz = component.getClass();
    Method[] methods = clazz.getMethods();
    Object value = null;
    for (Method method : methods) {
        if (method.getName().matches("^(is|get).*") && //$NON-NLS-1$
                method.getParameterTypes().length == 0) {
            try {
                Class<?> returnType = method.getReturnType();
                if (returnType != void.class && !returnType.getName().startsWith("[") && //$NON-NLS-1$
                        !setExclude.contains(method.getName())) {
                    String key = method.getName();
                    value = method.invoke(component);
                    if (value != null && !(value instanceof Component)) {
                        retVal.put(key, value);
                    }
                }
                // ignore exceptions that arise if the property could not be accessed
            } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {
                //no catch
            }
        }
    }
    return retVal;
}

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From source file:jp.terasoluna.fw.util.GenericPropertyUtil.java

/**
 * <code>JavaBean</code>? <code>Generics</code>?????
 * <p>//w ww . j  a  v a 2  s.c  o  m
 * <h5>?</h5>
 * 
 * <pre>
 * <code>
 * public class Bean {
 *     private Map&lt;String, Boolean&gt; map;
 *     public Map&lt;String, Boolean&gt; getMap() {
 *         return this.map;
 *     }
 * }
 * </code>
 * </pre>
 * 
 * ???<code>Bean</code>?????????? String.class????
 * 
 * <pre>
 * <code>
 * Bean bean = new Bean();
 * Class keyType =
 *     GenericCollectionUtil.resolveType(
 *         bean, "map", Map.class, 0);
 * </code>
 * </pre>
 *
 * @param bean <code>JavaBean</code>
 * @param name <code>Generics</code>????
 * @param genericClass <code>Generics</code>? ???
 * @param index ??
 * @return <code>Generics</code>??? ???????<code>Object</code>???
 * @throws IllegalArgumentException <code>bean</code>? <code>null</code>??<code>name</code>? <code>null</code>
 *             ???? <code>genericClass</code>?<code>null</code>?? <code>index</code>?<code>0</code>
 *             ???????? ???? <code>JavaBean</code>?? ??????????
 * @throws IllegalStateException ?<code>WildCardType</code>???
 */
public static Class<?> resolveType(Object bean, String name, Class<?> genericClass, int index)
        throws IllegalArgumentException, IllegalStateException {
    if (bean == null) {
        throw new IllegalArgumentException("Argument 'bean' (" + Object.class.getName() + " is null");
    }
    if (StringUtils.isBlank(name)) {
        throw new IllegalArgumentException("Argument 'name' (" + String.class.getName() + " is empty");
    }

    Method method = getMethod(bean, name);
    return resolveType(genericClass, method.getReturnType(), method.getGenericReturnType(), index);
}

---

From source file:com.mobius.software.mqtt.parser.test.StaticData.java

public static boolean isGetter(Method method) {
    if (!method.getName().startsWith("get"))
        return false;
    if (method.getParameterTypes().length != 0)
        return false;
    if (void.class.equals(method.getReturnType()))
        return false;
    return true;/*from   w ww . ja va 2s. co  m*/
}

---

From source file:com.github.cherimojava.data.mongo.entity.EntityUtils.java

/**
 * returns true if this getter methods return type is either an entity or a list of entities. Otherwise false
 * /*from   w  w w.ja v  a 2 s. c o m*/
 * @param getter
 * @return true if return type is entity or list of entities
 */
public static boolean isValidReferenceClass(Method getter) {
    return (Entity.class.isAssignableFrom(getter.getReturnType())
            || (Collection.class.isAssignableFrom(getter.getReturnType()) && Entity.class.isAssignableFrom(
                    (Class) ((ParameterizedType) getter.getGenericReturnType()).getActualTypeArguments()[0])));
}

---

From source file:com.robertsmieja.test.utils.junit.GettersAndSettersUtils.java

static <T> void ensureFieldCanHandleNullValues(T value, Method getter, Method setter)
        throws IllegalAccessException, InvocationTargetException {
    Object newFieldValue;// w w w  .j a  v  a2s  .  c  o m
    if (!getter.getReturnType().isPrimitive()) {
        setter.invoke(value, (Object) null);
        newFieldValue = getter.invoke(value);
        Assertions.assertNull(newFieldValue);
    }
}

---

From source file:com.robonobo.common.util.BeanPropertyAccessor.java

/**
 * Attempts to copy properties from the object from to object to
 * @param from/*from w  ww .  j  ava 2  s.  com*/
 * @param to
 */
public static void copy(Object from, Object to) throws Exception {
    BeanPropertyAccessor fromAccessor = new BeanPropertyAccessor(from);
    BeanPropertyAccessor toAccessor = new BeanPropertyAccessor(to);
    Iterator i = fromAccessor.getPropertyNames().iterator();
    while (i.hasNext()) {
        String property = (String) i.next();
        Method m = fromAccessor.getGetterMethod(property);
        if (fromAccessor.getProperty(property) != null) {
            toAccessor.setProperty(property, m.getReturnType(), fromAccessor.getProperty(property));
        }
    }

}

---

From source file:mangotiger.poker.channel.EventChannelImpl.java

static boolean methodMatchesEvent(final Method method, final Class<?> event) {
    return METHOD_NAME.equals(method.getName()) && Modifier.isPublic(method.getModifiers())
            && Void.TYPE.equals(method.getReturnType()) && method.getParameterTypes().length == 1
            && method.getParameterTypes()[0].isAssignableFrom(event);
}

---

From source file:net.sf.morph.reflect.support.MethodHolder.java

/**
 * Generate a String description of a Method.
 * @param method/*from ww w . j  a v a  2 s .  co  m*/
 * @return String
 */
protected static String methodToString(Method method) {
    StringBuffer buffer = new StringBuffer();
    buffer.append("<");
    buffer.append(method.getReturnType() == null ? "void" : method.getReturnType().getName());
    buffer.append("> ");
    buffer.append(method.getName());
    buffer.append("(");
    Class[] parameterTypes = method.getParameterTypes();
    if (parameterTypes != null) {
        for (int i = 0; i < parameterTypes.length; i++) {
            buffer.append(parameterTypes[i].getName());
            if (i != parameterTypes.length - 1) {
                buffer.append(",");
            }
        }
    }
    buffer.append(")");
    return buffer.toString();
}

---

From source file:cn.wanghaomiao.seimi.core.SeimiBeanResolver.java

private static Object defaultCastToTargetValue(Class target, Field field, List<Object> xpathRes) {
    Method getter = ReflectionUtils.findMethod(target, "get" + upperFirst(field.getName()));
    if (getter != null) {
        if (List.class.equals(getter.getReturnType())) {
            Class[] componentClazzs = GenericUtils.getActualClass(getter.getGenericReturnType());
            if (componentClazzs != null && componentClazzs.length > 0) {
                Class componentClass = componentClazzs[0];
                if (String.class.isAssignableFrom(componentClass)) {
                    List<String> resTmp = new LinkedList<>();
                    for (Object obj : xpathRes) {
                        if (obj instanceof Element) {
                            resTmp.add(((Element) obj).html());
                        } else {
                            resTmp.add(obj.toString());
                        }//w  ww. ja  va  2  s. c o m
                    }
                    return resTmp;
                } else if (Element.class.isAssignableFrom(componentClass)) {
                    return xpathRes;
                } else if (GenericUtils.isNumber(componentClass)) {
                    List resTmp = new LinkedList();
                    for (Object obj : xpathRes) {
                        resTmp.add(GenericUtils.castToNumber(componentClass, obj.toString()));
                    }
                    return resTmp;
                } else {
                    throw new SeimiBeanResolveException("not support field type");
                }
            }
        } else if (!Collection.class.isAssignableFrom(getter.getReturnType())
                && getter.getReturnType().isArray()) {
            Class componentClass = getter.getReturnType().getComponentType();
            if (String.class.isAssignableFrom(componentClass)) {
                List<String> resTmp = new LinkedList<>();
                for (Object obj : xpathRes) {
                    if (obj instanceof Element) {
                        resTmp.add(((Element) obj).html());
                    } else {
                        resTmp.add(obj.toString());
                    }
                }
                return resTmp;
            } else if (Element.class.isAssignableFrom(componentClass)) {
                return xpathRes;
            } else if (GenericUtils.isNumber(componentClass)) {
                List resTmp = new LinkedList();
                for (Object obj : xpathRes) {
                    resTmp.add(GenericUtils.castToNumber(componentClass, obj.toString()));
                }
                return resTmp;
            } else {
                throw new SeimiBeanResolveException("not support field type");
            }
        } else if (!Collection.class.isAssignableFrom(getter.getReturnType())
                && GenericUtils.isNumber(field.getType())) {
            return GenericUtils.castToNumber(field.getType(), StringUtils.join(xpathRes, ""));
        } else if (!Collection.class.isAssignableFrom(getter.getReturnType())
                && String.class.isAssignableFrom(field.getType())) {
            return StringUtils.join(xpathRes, "");
        }
    }
    return null;
}

---

From source file:org.carewebframework.shell.property.PropertyUtil.java

/**
 * Returns the requested method from an object instance.
 * /*from w  ww . j  ava 2s  .  c om*/
 * @param methodName Name of the setter method.
 * @param instance Object instance to search.
 * @param valueClass The desired property return type (null if don't care).
 * @param setter If true, search for setter method signature. If false, getter method signature.
 * @return The requested method.
 * @throws NoSuchMethodException If method was not found.
 */
private static Method findMethod(String methodName, Object instance, Class<?> valueClass, boolean setter)
        throws NoSuchMethodException {
    if (methodName == null) {
        return null;
    }

    int paramCount = setter ? 1 : 0;

    for (Method method : instance.getClass().getMethods()) {
        if (method.getName().equals(methodName) && method.getParameterTypes().length == paramCount) {
            Class<?> targetClass = setter ? method.getParameterTypes()[0] : method.getReturnType();

            if (valueClass == null || TypeUtils.isAssignable(targetClass, valueClass)) {
                return method;
            }
        }
    }

    throw new NoSuchMethodException("Compatible method not found: " + methodName);

}

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