Example usage for java.lang.reflect Method getGenericReturnType

Introduction

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

Prototype

public Type getGenericReturnType()

Source Link

Document

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

Usage

From source file:org.jiemamy.utils.reflect.ReflectionUtil.java

/**
 * ???????????????// w ww .j a va2 s.  c  o m
 * 
 * @param method 
 * @return ?????????????
 * @throws IllegalArgumentException ?{@code null}???
 */
public static Class<?> getElementTypeOfSetFromReturnType(Method method) {
    Validate.notNull(method);
    return getElementTypeOfSet(method.getGenericReturnType());
}

From source file:org.jiemamy.utils.reflect.ReflectionUtil.java

/**
 * ???????????????//  w ww.j  ava 2  s  . c o  m
 * 
 * @param method 
 * @return ?????????????
 * @throws IllegalArgumentException ?{@code null}???
 */
public static Class<?> getElementTypeOfListFromReturnType(Method method) {
    Validate.notNull(method);
    return getElementTypeOfList(method.getGenericReturnType());
}

From source file:eu.squadd.reflections.mapper.ServiceModelTranslator.java

private static Class detectSourceCollectionPayload(Method getter) {
    Class sourceArgClass = null;/*from w ww. j  a  v a 2 s  .c o  m*/
    Type sourceArg = getter.getGenericReturnType();
    if (sourceArg instanceof ParameterizedType) {
        ParameterizedType type = (ParameterizedType) sourceArg;
        Type[] typeArguments = type.getActualTypeArguments();
        sourceArgClass = (Class) typeArguments[0];
    }
    return sourceArgClass;
}

From source file:org.jiemamy.utils.reflect.ReflectionUtil.java

/**
 * ???????????????//from   w w  w.j  a  v  a 2 s  .c  o m
 * 
 * @param method 
 * @return ?????????????
 * @throws IllegalArgumentException ?{@code null}???
 */
public static Class<?> getElementTypeOfCollectionFromReturnType(Method method) {
    Validate.notNull(method);
    return getElementTypeOfCollection(method.getGenericReturnType());
}

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

@SuppressWarnings("unchecked")
private static <T> AffectedRowCountAndKey<T> executeUpdateAndKeepKeys(String template, Method method,
        NamedParameterJdbcTemplate jdbc, SqlParameterSource parameters) {

    Class<T> keyClass = (Class<T>) ((ParameterizedType) method.getGenericReturnType())
            .getActualTypeArguments()[0];

    KeyHolder keyHolder = new GeneratedKeyHolder();

    int result = jdbc.update(template, parameters, keyHolder);
    Map<String, Object> keys = keyHolder.getKeys();
    Object key;//  w  w  w.  ja  v  a2 s  .  co  m
    if (keys.size() > 1) {
        AutoGeneratedKey spec = Objects.requireNonNull(method.getDeclaredAnnotation(AutoGeneratedKey.class),
                "more than one key for query " + template + ": annotation @AutoGeneratedKey required");
        key = Objects.requireNonNull(keys.get(spec.value()), "the key with name " + spec.value()
                + " has returned null for query " + template + ": required a non null key");
    } else if (Number.class.isAssignableFrom(keyClass)) {
        Class<? extends Number> c = (Class<? extends Number>) keyClass;
        return new AffectedRowCountAndKey<>(result,
                (T) NumberUtils.convertNumberToTargetClass(keyHolder.getKey(), c));
    } else {
        key = keys.values().iterator().next();
    }
    return new AffectedRowCountAndKey<>(result, keyClass.cast(key));
}

From source file:eu.squadd.reflections.mapper.ServiceModelTranslator.java

private static Map<Integer, Class> detectSourceMapPayload(Method getter) {
    Map<Integer, Class> result = new HashMap();
    Type sourceArg = getter.getGenericReturnType();
    if (sourceArg instanceof ParameterizedType) {
        ParameterizedType type = (ParameterizedType) sourceArg;
        Type[] typeArguments = type.getActualTypeArguments();
        if (typeArguments.length != 2) {
            System.err.println("Cannot determine payload type of source Map ");
            return null;
        }// w ww  .  j av a  2  s  .  co  m
        result.put(0, (Class) typeArguments[0]);
        result.put(1, (Class) typeArguments[1]);
    }
    return result;
}

From source file:org.bonitasoft.engine.commons.ClassReflector.java

public static Type getGetterReturnType(final Class<?> classConnector, final String getterName)
        throws SReflectException {
    Method m;
    try {/*www. j a  va 2 s .  com*/
        m = getMethod(classConnector, getterName);
    } catch (final Exception e) {
        throw new SReflectException(e);
    }
    return m.getGenericReturnType();
}

From source file:com.wavemaker.json.type.reflect.ReflectTypeUtils.java

/**
 * Retrieves the field definition from that field's read method. This will recursively call get
 * //w  w  w.  j  a  va 2s  .co  m
 * @param method
 * @return
 */
public static FieldDefinition getFieldDefinition(Method method, TypeState typeState, boolean strict,
        String name) {

    return getFieldDefinition(method.getGenericReturnType(), typeState, strict, name);
}

From source file:api.wiki.WikiGenerator.java

private static String methodDisplayName(Method apiMethod) {
    String methodName = apiMethod.getName();
    String parameterTypes = stream(apiMethod.getGenericParameterTypes()).map(WikiGenerator::typeDisplayName)
            .collect(joining(", "));
    return typeDisplayName(apiMethod.getGenericReturnType()) + " " + methodName + "(" + parameterTypes + ")";
}

From source file:org.eclipse.wb.internal.swing.databinding.model.generic.GenericUtils.java

public static IGenericType getObjectType(TypeVariable<?> superTypeParameter, Type superTypeParameterClass,
        PropertyDescriptor descriptor) {
    Method readMethod = descriptor.getReadMethod();
    Class<?> rawType = descriptor.getPropertyType();
    if (readMethod == null) {
        return new ClassGenericType(rawType, null, null);
    }/*from  ww  w . j  a  v  a2s .co  m*/
    Type type = readMethod.getGenericReturnType();
    if (type instanceof Class<?> || type instanceof TypeVariable<?>) {
        return new ClassGenericType(rawType, null, null);
    }
    if (type instanceof ParameterizedType) {
        GenericTypeContainer genericType = new GenericTypeContainer(rawType);
        ParameterizedType parameterizedType = (ParameterizedType) type;
        //
        if (superTypeParameter != null && parameterizedType.getActualTypeArguments().length == 1
                && superTypeParameter == parameterizedType.getActualTypeArguments()[0]) {
            genericType.getSubTypes().add(resolveType(superTypeParameterClass));
            return genericType;
        }
        for (Type subType : parameterizedType.getActualTypeArguments()) {
            genericType.getSubTypes().add(resolveType(subType));
        }
        return genericType;
    }
    if (type instanceof GenericArrayType) {
        int dimension = 0;
        Type elementType = null;
        GenericArrayType arrayType = (GenericArrayType) type;
        while (true) {
            dimension++;
            elementType = arrayType.getGenericComponentType();
            if (elementType instanceof GenericArrayType) {
                arrayType = (GenericArrayType) elementType;
                continue;
            }
            break;
        }
        GenericTypeContainer genericType = new GenericTypeContainer(rawType, dimension);
        genericType.getSubTypes().add(resolveType(elementType));
        return genericType;
    }
    Assert.fail(MessageFormat.format("Undefine type: {0} {1}", readMethod, rawType));
    return null;
}