Example usage for org.apache.commons.lang3.reflect ConstructorUtils invokeConstructor

Introduction

In this page you can find the example usage for org.apache.commons.lang3.reflect ConstructorUtils invokeConstructor.

Prototype

public static <T> T invokeConstructor(final Class<T> cls, Object... args) throws NoSuchMethodException,
        IllegalAccessException, InvocationTargetException, InstantiationException 

Source Link

Document

Returns a new instance of the specified class inferring the right constructor from the types of the arguments.

This locates and calls a constructor.

Usage

From source file:com.jsen.core.misc.MimeContentRegistryBase.java

/**
 * Constructs MIME content factory from a given class and constructor arguments.
 * //from www  .  j  a v  a  2 s  .c  om
 * @param factoryClass MIME content factory class of which should be constructed the instance.
 * @param args Constructor arguments for factory.
 * @return Constructed MIME content factory on success, otherwise null.
 */
protected MimeContentFactory instantizeMimeContentFactory(Class<? extends MimeContentFactory> factoryClass,
        Object... args) {
    MimeContentFactory mimeContentFactory = null;

    try {
        /*List<Class<?>> constructorClassesList = new ArrayList<Class<?>>();
                
        for (Object arg : args) {
           constructorClassesList.add(arg.getClass());
        }
                
        Class<?> constructorClasses[] = constructorClassesList.toArray(new Class<?>[constructorClassesList.size()]);
                
        Constructor<? extends MimeContentFactoryBase<?>> mimeContentFactoryConstructor = factoryClass.getConstructor(constructorClasses);
        mimeContentFactory = mimeContentFactoryConstructor.newInstance(args);*/

        Object newInstance = ConstructorUtils.invokeConstructor(factoryClass, args);
        mimeContentFactory = factoryClass.cast(newInstance);

    } catch (Exception e) {
        e.printStackTrace();
    }

    return mimeContentFactory;
}

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From source file:com.thinkbiganalytics.metadata.modeshape.BaseJcrProvider.java

public <D, R> Iterable<D> findIterable(String query, Class<D> domainClass, Class<R> resultClass) {
    return () -> {
        return StreamSupport.stream(findIterableNodes(query).spliterator(), false).map(node -> {
            try {
                @SuppressWarnings("unchecked")
                D entity = (D) ConstructorUtils.invokeConstructor(resultClass, node);
                return entity;
            } catch (Exception e) {
                throw new MetadataRepositoryException("Failed to create entity: " + resultClass, e);
            }//www . j ava 2s . co m
        }).iterator();
    };
}

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From source file:com.offbynull.coroutines.instrumenter.InstrumenterTest.java

private void performCountTest(String testClass) throws Exception {
    StringBuilder builder = new StringBuilder();

    try (URLClassLoader classLoader = loadClassesInZipResourceAndInstrument(testClass + ".zip")) {
        Class<Coroutine> cls = (Class<Coroutine>) classLoader.loadClass(testClass);
        Coroutine coroutine = ConstructorUtils.invokeConstructor(cls, builder);

        CoroutineRunner runner = new CoroutineRunner(coroutine);

        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertFalse(runner.execute()); // coroutine finished executing here
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());

        Assert.assertEquals("started\n" + "0\n" + "1\n" + "2\n" + "3\n" + "4\n" + "5\n" + "6\n" + "7\n" + "8\n"
                + "9\n" + "started\n" + "0\n" + "1\n" + "2\n", builder.toString());
    }/*from   w ww  .  j a v  a2 s  . c  o  m*/
}

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From source file:com.offbynull.coroutines.instrumenter.InstrumenterTest.java

@Test
public void mustProperlySuspendInTryCatchFinally() throws Exception {
    StringBuilder builder = new StringBuilder();

    try (URLClassLoader classLoader = loadClassesInZipResourceAndInstrument(EXCEPTION_SUSPEND_TEST + ".zip")) {
        Class<Coroutine> cls = (Class<Coroutine>) classLoader.loadClass(EXCEPTION_SUSPEND_TEST);
        Coroutine coroutine = ConstructorUtils.invokeConstructor(cls, builder);

        CoroutineRunner runner = new CoroutineRunner(coroutine);

        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertFalse(runner.execute()); // coroutine finished executing here

        Assert.assertEquals("START\n" + "IN TRY 1\n" + "IN TRY 2\n" + "IN CATCH 1\n" + "IN CATCH 2\n"
                + "IN FINALLY 1\n" + "IN FINALLY 2\n" + "END\n", builder.toString());
    }//from  ww  w  .jav  a 2  s .c  o m
}

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From source file:com.offbynull.coroutines.instrumenter.InstrumenterTest.java

@Test
public void mustProperlySuspendInTryCatchFinallyWithOldJsrInstructions() throws Exception {
    StringBuffer builder = new StringBuffer();

    try (URLClassLoader classLoader = loadClassesInZipResourceAndInstrument(
            JSR_EXCEPTION_SUSPEND_TEST + ".zip")) {
        Class<Coroutine> cls = (Class<Coroutine>) classLoader.loadClass(JSR_EXCEPTION_SUSPEND_TEST);
        Coroutine coroutine = ConstructorUtils.invokeConstructor(cls, builder);

        CoroutineRunner runner = new CoroutineRunner(coroutine);

        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertTrue(runner.execute());
        Assert.assertFalse(runner.execute()); // coroutine finished executing here

        Assert.assertEquals("START\n" + "IN TRY 1\n" + "IN TRY 2\n" + "IN CATCH 1\n" + "IN CATCH 2\n"
                + "IN FINALLY 1\n" + "IN FINALLY 2\n" + "END\n", builder.toString());
    }/*from  ww w  .ja v a  2s .  c om*/
}

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From source file:gobblin.hive.policy.HiveRegistrationPolicyBase.java

/**
 * Get a {@link HiveRegistrationPolicy} from a {@link State} object.
 *
 * @param props A {@link State} object that contains property, {@link #HIVE_REGISTRATION_POLICY},
 * which is the class name of the desired policy. This policy class must have a constructor that
 * takes a {@link State} object.//  w  w w . jav  a2s  .  c  om
 */
public static HiveRegistrationPolicy getPolicy(State props) {
    Preconditions.checkArgument(props.contains(ConfigurationKeys.HIVE_REGISTRATION_POLICY));

    String policyType = props.getProp(ConfigurationKeys.HIVE_REGISTRATION_POLICY);
    try {
        return (HiveRegistrationPolicy) ConstructorUtils.invokeConstructor(Class.forName(policyType), props);
    } catch (ReflectiveOperationException e) {
        throw new RuntimeException("Unable to instantiate " + HiveRegistrationPolicy.class.getSimpleName()
                + " with type " + policyType, e);
    }
}

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From source file:com.thinkbiganalytics.policy.BasePolicyAnnotationTransformer.java

private P createClass(BaseUiPolicyRule rule) throws ClassNotFoundException, InvocationTargetException,
        NoSuchMethodException, InstantiationException, IllegalAccessException {
    P domainPolicy = null;/*from w ww  . ja  va 2 s .  co m*/
    String classType = rule.getObjectClassType();
    Class<P> domainPolicyClass = (Class<P>) Class.forName(classType);

    Constructor constructor = null;
    Object[] paramValues = null;
    boolean hasConstructor = false;
    for (Constructor con : domainPolicyClass.getConstructors()) {
        hasConstructor = true;
        int parameterSize = con.getParameterTypes().length;
        paramValues = new Object[parameterSize];
        for (int p = 0; p < parameterSize; p++) {
            Annotation[] annotations = con.getParameterAnnotations()[p];
            Object paramValue = null;
            for (Annotation a : annotations) {
                if (a instanceof PolicyPropertyRef) {
                    // this is the one we want
                    if (constructor == null) {
                        constructor = con;
                    }
                    //find the value associated to this property
                    paramValue = getPropertyValue(rule, domainPolicyClass, (PolicyPropertyRef) a);

                }
            }
            paramValues[p] = paramValue;
        }
        if (constructor != null) {
            //exit once we find a constructor with @PropertyRef
            break;
        }

    }

    if (constructor != null) {
        //call that constructor
        try {
            domainPolicy = ConstructorUtils.invokeConstructor(domainPolicyClass, paramValues);
        } catch (NoSuchMethodException e) {
            domainPolicy = domainPolicyClass.newInstance();
        }
    } else {
        //if the class has no public constructor then attempt to call the static instance method
        if (!hasConstructor) {
            //if the class has a static "instance" method on it then call that
            try {
                domainPolicy = (P) MethodUtils.invokeStaticMethod(domainPolicyClass, "instance", null);
            } catch (NoSuchMethodException | SecurityException | InvocationTargetException e) {
                domainPolicy = domainPolicyClass.newInstance();
            }
        } else {
            //attempt to create a new instance
            domainPolicy = domainPolicyClass.newInstance();
        }

    }

    return domainPolicy;

}

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From source file:com.thinkbiganalytics.metadata.modeshape.support.JcrUtil.java

/**
 * Create a new Node Wrapper Object that invokes a constructor with at least parameter of type Node
 *///from  w  w w .j av a 2  s  .  co  m
public static <T extends Object> T constructNodeObject(Node node, Class<T> type, Object... constructorArgs) {
    T entity = null;
    try {
        if (constructorArgs != null) {
            constructorArgs = ArrayUtils.add(constructorArgs, 0, node);
        } else {
            constructorArgs = new Object[] { node };
        }

        entity = ConstructorUtils.invokeConstructor(type, constructorArgs);
    } catch (InvocationTargetException | NoSuchMethodException | InstantiationException
            | IllegalAccessException e) {
        throw new MetadataRepositoryException("Failed to createJcrObject for node " + type, e);
    }
    return entity;
}

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From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

/**
 * Instantiate the classObject.// w w w  .  jav a2 s  .c o  m
 * 
 * @param params
 *          the params
 * @return the object
 * @throws Exception
 *           the exception
 */
public Object instance(final Object... params) throws Exception {
    if (buildedClass == null) {
        toClass();
    }
    return ConstructorUtils.invokeConstructor(buildedClass, params);
}

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From source file:org.apache.gobblin.cluster.ScheduledJobConfigurationManager.java

public ScheduledJobConfigurationManager(EventBus eventBus, Config config) {
    super(eventBus, config);

    this.jobSpecs = Maps.newHashMap();
    this.refreshIntervalInSeconds = ConfigUtils.getLong(config,
            GobblinClusterConfigurationKeys.JOB_SPEC_REFRESH_INTERVAL, DEFAULT_JOB_SPEC_REFRESH_INTERVAL);

    this.fetchJobSpecExecutor = Executors.newSingleThreadScheduledExecutor(
            ExecutorsUtils.newThreadFactory(Optional.of(LOGGER), Optional.of("FetchJobSpecExecutor")));

    this.aliasResolver = new ClassAliasResolver<>(SpecConsumer.class);
    try {//from   www . j av a2  s .  c  o  m
        String specConsumerClassName = GobblinClusterConfigurationKeys.DEFAULT_SPEC_CONSUMER_CLASS;
        if (config.hasPath(GobblinClusterConfigurationKeys.SPEC_CONSUMER_CLASS_KEY)) {
            specConsumerClassName = config.getString(GobblinClusterConfigurationKeys.SPEC_CONSUMER_CLASS_KEY);
        }
        LOGGER.info("Using SpecConsumer ClassNameclass name/alias " + specConsumerClassName);
        this._specConsumer = (SpecConsumer) ConstructorUtils
                .invokeConstructor(Class.forName(this.aliasResolver.resolve(specConsumerClassName)), config);
    } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException | InstantiationException
            | ClassNotFoundException e) {
        throw new RuntimeException(e);
    }
}

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