Example usage for java.lang Class isAssignableFrom

List of usage examples for java.lang Class isAssignableFrom

  1. HOME
  2. Java
  3. java
  4. java.lang.*
  5. Class
  6. isAssignableFrom

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public native boolean isAssignableFrom(Class<?> cls);

Source Link

Document

Determines if the class or interface represented by this Class object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified Class parameter.

Usage

From source file:net.servicefixture.PluginManager.java

@SuppressWarnings("unchecked")
private static Object newInstance(String classname, Class baseClazz) {
    try {//from  w  w  w .j  a  v  a  2  s  . com
        Class clazz = ReflectionUtils.newClass(classname);
        if (baseClazz.isAssignableFrom(clazz)) {
            return ReflectionUtils.newInstance(clazz);
        }
    } catch (RuntimeException e) {
        throw new ServiceFixtureException("Unable to load plugins due to:" + e.getMessage());
    }

    throw new ServiceFixtureException(
            "Unable to load plugins, class " + classname + " doesn't implement " + baseClazz.getName());
}

From source file:com.npower.dm.util.DMUtil.java

/**
 * Use reflection to access a URL[] getURLs or ULR[] getAllURLs method so that
 * non-URLClassLoader class loaders, or class loaders that override getURLs to
 * return null or empty, can provide the true classpath info.
 *//*from  w w w.j  av  a  2 s .c  o  m*/
public static URL[] getClassLoaderURLs(ClassLoader cl) {
    URL[] urls = {};
    try {
        Class<?> returnType = urls.getClass();
        Class<?>[] parameterTypes = {};
        Method getURLs = cl.getClass().getMethod("getURLs", parameterTypes);
        if (returnType.isAssignableFrom(getURLs.getReturnType())) {
            Object[] args = {};
            urls = (URL[]) getURLs.invoke(cl, args);
        }
    } catch (Exception ignore) {
    }
    return urls;
}

From source file:com.netflix.paas.config.base.ConfigurationProxyUtils.java

static Supplier<?> getStaticSupplier(Class<?> type, String key, String defaultValue,
        AbstractConfiguration configuration) {
    if (type.isAssignableFrom(String.class)) {
        return Suppliers.ofInstance(configuration.getString(key, defaultValue));
    } else if (type.isAssignableFrom(Integer.class)) {
        return Suppliers.ofInstance(
                configuration.getInteger(key, defaultValue == null ? 0 : Integer.parseInt(defaultValue)));
    } else if (type.isAssignableFrom(Double.class)) {
        return Suppliers.ofInstance(
                configuration.getDouble(key, defaultValue == null ? 0.0 : Double.parseDouble(defaultValue)));
    } else if (type.isAssignableFrom(Long.class)) {
        return Suppliers.ofInstance(
                configuration.getLong(key, defaultValue == null ? 0L : Long.parseLong(defaultValue)));
    } else if (type.isAssignableFrom(Boolean.class)) {
        return Suppliers.ofInstance(configuration.getBoolean(key,
                defaultValue == null ? false : Boolean.parseBoolean(defaultValue)));
    }//from w  ww.j a  v a2  s  . co m
    throw new RuntimeException("Unsupported value type " + type.getCanonicalName());
}

From source file:Main.java

public static <BoundType> boolean isJAXBElement(Class<BoundType> declaredType, QName name, Class scope,
        Object value) {/* w ww.  ja va 2  s. c om*/
    if (value == null) {
        return false;
    } else if (value instanceof JAXBElement) {
        final JAXBElement<?> element = (JAXBElement<?>) value;

        return element.getName().equals(name) && declaredType.isAssignableFrom(element.getDeclaredType());
    } else {
        return false;
    }
}

From source file:com.netflix.governator.configuration.ArchaiusConfigurationProvider.java

protected static Supplier<?> getDynamicSupplier(Class<?> type, String key, String defaultValue,
        DynamicPropertyFactory propertyFactory) {
    if (type.isAssignableFrom(String.class)) {
        return new PropertyWrapperSupplier<String>(propertyFactory.getStringProperty(key, defaultValue));
    } else if (type.isAssignableFrom(Integer.class)) {
        return new PropertyWrapperSupplier<Integer>(
                propertyFactory.getIntProperty(key, defaultValue == null ? 0 : Integer.parseInt(defaultValue)));
    } else if (type.isAssignableFrom(Double.class)) {
        return new PropertyWrapperSupplier<Double>(propertyFactory.getDoubleProperty(key,
                defaultValue == null ? 0.0 : Double.parseDouble(defaultValue)));
    } else if (type.isAssignableFrom(Long.class)) {
        return new PropertyWrapperSupplier<Long>(
                propertyFactory.getLongProperty(key, defaultValue == null ? 0L : Long.parseLong(defaultValue)));
    } else if (type.isAssignableFrom(Boolean.class)) {
        return new PropertyWrapperSupplier<Boolean>(propertyFactory.getBooleanProperty(key,
                defaultValue == null ? false : Boolean.parseBoolean(defaultValue)));
    }/*from   w ww. jav a2 s .  c  o  m*/
    throw new RuntimeException("Unsupported value type " + type.getCanonicalName());
}

From source file:com.netflix.paas.config.base.ConfigurationProxyUtils.java

static Supplier<?> getDynamicSupplier(Class<?> type, String key, String defaultValue,
        DynamicPropertyFactory propertyFactory) {
    if (type.isAssignableFrom(String.class)) {
        return new PropertyWrapperSupplier<String>(propertyFactory.getStringProperty(key, defaultValue));
    } else if (type.isAssignableFrom(Integer.class)) {
        return new PropertyWrapperSupplier<Integer>(
                propertyFactory.getIntProperty(key, defaultValue == null ? 0 : Integer.parseInt(defaultValue)));
    } else if (type.isAssignableFrom(Double.class)) {
        return new PropertyWrapperSupplier<Double>(propertyFactory.getDoubleProperty(key,
                defaultValue == null ? 0.0 : Double.parseDouble(defaultValue)));
    } else if (type.isAssignableFrom(Long.class)) {
        return new PropertyWrapperSupplier<Long>(
                propertyFactory.getLongProperty(key, defaultValue == null ? 0L : Long.parseLong(defaultValue)));
    } else if (type.isAssignableFrom(Boolean.class)) {
        return new PropertyWrapperSupplier<Boolean>(propertyFactory.getBooleanProperty(key,
                defaultValue == null ? false : Boolean.parseBoolean(defaultValue)));
    }//from w w w.j a  va 2s.c  o  m
    throw new RuntimeException("Unsupported value type " + type.getCanonicalName());
}

From source file:com.impetus.client.cassandra.common.CassandraUtilities.java

/**
 * @param value//  www . ja  va2 s  .com
 * @param f
 * @return
 */
public static ByteBuffer toBytes(Object value, Class<?> clazz) {
    if (clazz.isAssignableFrom(String.class)) {
        return UTF8Type.instance.decompose((String) value);
    } else if (clazz.equals(int.class) || clazz.isAssignableFrom(Integer.class)) {
        return Int32Type.instance.decompose(Integer.parseInt(value.toString()));
    } else if (clazz.equals(long.class) || clazz.isAssignableFrom(Long.class)) {
        return LongType.instance.decompose(Long.parseLong(value.toString()));
    } else if (clazz.equals(boolean.class) || clazz.isAssignableFrom(Boolean.class)) {
        return BooleanType.instance.decompose(Boolean.valueOf(value.toString()));
    } else if (clazz.equals(double.class) || clazz.isAssignableFrom(Double.class)) {
        return DoubleType.instance.decompose(Double.valueOf(value.toString()));
    } else if (clazz.isAssignableFrom(java.util.UUID.class)) {
        return UUIDType.instance.decompose(UUID.fromString(value.toString()));
    } else if (clazz.equals(float.class) || clazz.isAssignableFrom(Float.class)) {
        return FloatType.instance.decompose(Float.valueOf(value.toString()));
    } else if (clazz.isAssignableFrom(Date.class)) {
        DateAccessor dateAccessor = new DateAccessor();
        return DateType.instance.decompose((Date) value);
    } else {
        if (value.getClass().isAssignableFrom(String.class)) {
            value = PropertyAccessorFactory.getPropertyAccessor(clazz).fromString(clazz, value.toString());
        }
        return BytesType.instance
                .decompose(ByteBuffer.wrap(PropertyAccessorFactory.getPropertyAccessor(clazz).toBytes(value)));
    }
}

From source file:org.lambdamatic.internal.elasticsearch.codec.DocumentCodec.java

/**
 * Converts the given {@code value} into a value of type {@code targetType}.
 * <p>//from   w  w w .j a v a 2s. co  m
 * <strong>Note:</strong>The conversion relies on the existence of a static
 * {@code valueOf(String)} method in the given {@code targetType} to convert the value.
 * </p>
 * 
 * @param value the input value
 * @param targetType the target type of the value to return
 * @return the converted value (or the value itself if no conversion was necessary)
 */
protected static Object convertValue(final Object value, final Class<?> targetType) {
    if (targetType.isAssignableFrom(value.getClass())) {
        return value;
    } else if (targetType.isPrimitive()) {
        if (targetType == boolean.class) {
            return Boolean.parseBoolean(value.toString());
        } else if (targetType == byte.class) {
            return Byte.parseByte(value.toString());
        } else if (targetType == short.class) {
            return Short.parseShort(value.toString());
        } else if (targetType == int.class) {
            return Integer.parseInt(value.toString());
        } else if (targetType == long.class) {
            return Long.parseLong(value.toString());
        } else if (targetType == double.class) {
            return Double.parseDouble(value.toString());
        } else if (targetType == float.class) {
            return Float.parseFloat(value.toString());
        }
        throw new CodecException("Failed to convert value '" + value.toString() + "' ("
                + value.getClass().getName() + ")  into a " + targetType.getName()
                + ": no object to primitive conversion available.");
    }
    try {
        final Method convertMethod = getConvertMethod(targetType);
        if (convertMethod != null) {
            return convertMethod.invoke(null, value.toString());
        }
        throw new CodecException(
                "Failed to convert value '" + value.toString() + "' (" + value.getClass().getName()
                        + ")  into a " + targetType.getName() + ": no conversion method available.");
    } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException
            | SecurityException e) {
        throw new CodecException("Failed to convert value '" + value.toString() + "' ("
                + value.getClass().getName() + ") into a " + targetType.getClass().getName(), e);
    }
}

From source file:baggage.BaseTestCase.java

protected static void assertFailure(Class<? extends Exception> klass, Fallible fallible) {
    try {/* w w  w .  ja  va  2  s .  c  o  m*/
        fallible.execute();
    } catch (Exception e) {
        if (!klass.isAssignableFrom(e.getClass())) {
            throw new RuntimeException(
                    "Expected a " + klass.getSimpleName() + ", got a " + e.getClass().getSimpleName(), e);
        }
        return;
    }
    Assert.fail("Expected a " + klass.getSimpleName() + ", got no exceptions at all");
}

From source file:com.haulmont.cuba.core.config.type.TypeFactory.java

private static boolean isAcceptableMethod(Class<?> returnType, Method factoryMethod) {
    int modifiers = factoryMethod.getModifiers();
    return Modifier.isStatic(modifiers) && Modifier.isPublic(modifiers)
            && returnType.isAssignableFrom(factoryMethod.getReturnType());
}