Example usage for java.lang Class cast

Introduction

In this page you can find the example usage for java.lang Class cast.

Prototype

@SuppressWarnings("unchecked")
@HotSpotIntrinsicCandidate
public T cast(Object obj)

Source Link

Document

Casts an object to the class or interface represented by this Class object.

Usage

From source file:net.minecraftforge.common.util.EnumHelper.java

private static <T extends Enum<?>> T makeEnum(Class<T> enumClass, @Nullable String value, int ordinal,
        Class<?>[] additionalTypes, @Nullable Object[] additionalValues) throws Exception {
    int additionalParamsCount = additionalValues == null ? 0 : additionalValues.length;
    Object[] params = new Object[additionalParamsCount + 2];
    params[0] = value;/*from w w  w  .  j  a  v a 2  s. c  om*/
    params[1] = ordinal;
    if (additionalValues != null) {
        System.arraycopy(additionalValues, 0, params, 2, additionalValues.length);
    }
    return enumClass.cast(
            newInstance.invoke(getConstructorAccessor(enumClass, additionalTypes), new Object[] { params }));
}

From source file:com.kegare.caveworld.util.CaveUtils.java

public static <T extends Entity> T createEntity(Class<T> clazz, World world) {
    try {//w ww . ja v a  2s.c o m
        String name = String.valueOf(EntityList.classToStringMapping.get(clazz));
        Entity entity = EntityList.createEntityByName(Strings.nullToEmpty(name), world);

        if (entity == null || entity.getClass() != clazz) {
            return null;
        }

        return clazz.cast(entity);
    } catch (Exception e) {
        CaveLog.warning("Failed to create entity: %s", clazz.getSimpleName());

        return null;
    }
}

From source file:eu.europa.ec.fisheries.uvms.exchange.search.SearchFieldMapper.java

public static <T> T buildValueFromClassType(SearchValue entry, Class<T> valueType) {
    StringBuilder builder = new StringBuilder();

    try {//from w w  w  .j  a v a2 s.  c o m

        if (valueType.isAssignableFrom(String.class)) {
            if (entry.getValue().contains("*")) {
                String value = entry.getValue().replace("*", "%");
                builder.append("'").append(value).append("'");
            } else {
                builder.append(entry.getValue());
            }

            return valueType.cast(builder.toString());
        } else if (valueType.isAssignableFrom(Boolean.class)) {
            if ("TRUE".equalsIgnoreCase(entry.getValue()) || "T".equalsIgnoreCase(entry.getValue())) {
                return valueType.cast(Boolean.TRUE);
            } else {
                return valueType.cast(Boolean.FALSE);
            }
        } else if (valueType.isAssignableFrom(Date.class)) {
            return valueType.cast(DateUtils.parseToUTCDateTime(entry.getValue()));
        } else if (valueType.isAssignableFrom(Integer.class)) {
            return valueType.cast(Integer.valueOf(entry.getValue()));
        } else if (valueType.isAssignableFrom(TypeRefType.class)) {
            return valueType.cast(TypeRefType.valueOf(entry.getValue()));
        } else if (valueType.isAssignableFrom(ExchangeLogStatusTypeType.class)) {
            return valueType.cast(ExchangeLogStatusTypeType.valueOf(entry.getValue()));
        }

        return valueType.cast(entry.getValue());
    } catch (ClassCastException cce) {
        LOG.error("Error casting parameter: " + entry.getField().getFieldName() + " having value: "
                + entry.getValue(), cce);
        return null;
    }
}

From source file:hudson.security.SecurityRealm.java

/**
 * Picks up the instance of the given type from the spring context.
 * If there are multiple beans of the same type or if there are none,
 * this method treats that as an {@link IllegalArgumentException}.
 *
 * This method is intended to be used to pick up a Acegi object from
 * spring once the bean definition file is parsed.
 *///ww w  .  ja va  2  s .c o  m
public static <T> T findBean(Class<T> type, ApplicationContext context) {
    Map m = context.getBeansOfType(type);
    switch (m.size()) {
    case 0:
        throw new IllegalArgumentException("No beans of " + type + " are defined");
    case 1:
        return type.cast(m.values().iterator().next());
    default:
        throw new IllegalArgumentException("Multiple beans of " + type + " are defined: " + m);
    }
}

From source file:org.apache.hadoop.fs.s3a.TestS3AConfiguration.java

/**
 * Reads and returns a field from an object using reflection.  If the field
 * cannot be found, is null, or is not the expected type, then this method
 * fails the test.//from ww  w.  j  av  a2 s.  co m
 *
 * @param target object to read
 * @param fieldType type of field to read, which will also be the return type
 * @param fieldName name of field to read
 * @return field that was read
 * @throws IllegalAccessException if access not allowed
 */
private static <T> T getField(Object target, Class<T> fieldType, String fieldName)
        throws IllegalAccessException {
    Object obj = FieldUtils.readField(target, fieldName, true);
    assertNotNull(String.format("Could not read field named %s in object with class %s.", fieldName,
            target.getClass().getName()), obj);
    assertTrue(String.format("Unexpected type found for field named %s, expected %s, actual %s.", fieldName,
            fieldType.getName(), obj.getClass().getName()), fieldType.isAssignableFrom(obj.getClass()));
    return fieldType.cast(obj);
}

From source file:org.apache.taverna.databundle.DataBundles.java

private static <T> Stream<T> resolveItemAsStream(Path path, Class<T> type, ResolveOptions options)
        throws UncheckedIOException {
    try {/*from ww w.ja  v a2 s.co m*/
        Object value = resolve(path, options);
        if (type.isInstance(value)) {
            return Stream.of(type.cast(value));
        }
        return Stream.empty();
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

From source file:gov.nasa.ensemble.common.CommonUtils.java

/**
 * Returns a new list of the items in list, casting all of them to the provided class. So, it will throw a ClassCastException if any of the items can not be cast to the provided class.
 * //from   w  w w  .j a va 2s  . co  m
 * @param klass
 * @param list
 * @return a new list of the items in list
 */
public static final <T> List<T> castList(Class<T> klass, List list, boolean unmodifiable) {
    if (list == null)
        return null;
    List<T> result = new ArrayList<T>(list.size());
    for (Object object : list) {
        result.add(klass.cast(object));
    }
    return unmodifiable ? Collections.unmodifiableList(result) : result;
}

From source file:gov.nasa.ensemble.common.CommonUtils.java

public static <T> T getAdapter(Object adaptable, Class<T> adapterClass) {
    if (adaptable == null) {
        return null;
    }//from ww w.  j  a v  a  2 s .c  o m
    if (adaptable instanceof IAdaptable) {
        IAdaptable iAdaptable = (IAdaptable) adaptable;
        T adapter = adapterClass.cast(iAdaptable.getAdapter(adapterClass));
        if (adapter != null) {
            return adapter;
        }
    }
    IAdapterManager manager = Platform.getAdapterManager();
    T adapter = adapterClass.cast(manager.loadAdapter(adaptable, adapterClass.getName()));
    return adapter;
}

From source file:com.wms.utils.DataUtil.java

public static <T> T getMapValue(Map<String, Object> params, String key, Class<T> type) {
    Object obj = params.get(key);
    if (obj == null) {
        return null;
    }//from   w w  w  .j  a  va2 s .  c  o  m
    if (obj.getClass().isAssignableFrom(obj.getClass())) {
        return type.cast(obj);
    }

    return null;
}

From source file:org.apache.brooklyn.rest.client.BrooklynApi.java

public static <T> T getEntity(Response response, Class<T> type) {
    if (response instanceof ClientResponse) {
        ClientResponse<?> clientResponse = (ClientResponse<?>) response;
        return clientResponse.getEntity(type);
    } else if (response instanceof BuiltResponse) {
        // Handle BuiltResponsePreservingError turning objects into Strings
        if (response.getEntity() instanceof String && !type.equals(String.class)) {
            return new Gson().fromJson(response.getEntity().toString(), type);
        }/*from  w w w .ja v  a  2 s  . c o m*/
    }
    // Last-gasp attempt.
    return type.cast(response.getEntity());
}