Example usage for java.lang Class getConstructor

Introduction

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

Prototype

@CallerSensitive
public Constructor<T> getConstructor(Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException

Source Link

Document

Returns a Constructor object that reflects the specified public constructor of the class represented by this Class object.

Usage

From source file:ezbake.thrift.ThriftUtils.java

@SuppressWarnings("unchecked")
public static <Y extends TServiceClient> Y getClient(Class<Y> clazz, HostAndPort hostAndPort,
        Properties properties) throws NoSuchMethodException, TException, Exception {
    final Constructor<?> constructor = clazz.getConstructor(TProtocol.class);
    final Object ds = constructor.newInstance(getProtocol(hostAndPort, properties));
    return (Y) ds;
}

From source file:it.unimi.di.big.mg4j.document.PropertyBasedDocumentFactory.java

public static PropertyBasedDocumentFactory getInstance(final Class<?> klass, final String[] property)
        throws InstantiationException, IllegalAccessException, InvocationTargetException,
        NoSuchMethodException {//from  w w w  . j a v  a 2  s  . c  o  m
    return (PropertyBasedDocumentFactory) (klass.getConstructor(new Class[] { String[].class })
            .newInstance(new Object[] { property }));
}

From source file:it.unimi.di.big.mg4j.document.PropertyBasedDocumentFactory.java

public static PropertyBasedDocumentFactory getInstance(final Class<?> klass, final Properties properties)
        throws InstantiationException, IllegalAccessException, InvocationTargetException,
        NoSuchMethodException {/*from  w ww . jav a  2  s .c o m*/
    return (PropertyBasedDocumentFactory) (klass.getConstructor(Properties.class).newInstance(properties));
}

From source file:com.cloudbees.eclipse.core.util.Utils.java

public static <T> T createInstance(final Class<T> clazz, final Class<?>[] types, final Object[] params) {
    try {//  w  w w.  j a  v a2 s  . c  o  m
        Constructor<T> cnst;
        cnst = clazz.getConstructor(types);
        return cnst.newInstance(params);
    } catch (SecurityException e) {
    } catch (NoSuchMethodException e) {
    } catch (IllegalArgumentException e) {
    } catch (InstantiationException e) {
    } catch (IllegalAccessException e) {
    } catch (InvocationTargetException e) {
    }
    return null;
}

From source file:edu.cwru.sepia.environment.Environment.java

/**
 * Do some reflection to read the type of tracker to use and call its constructor with a random if possible, 
 * and failing that, no argument.//from   w ww  . ja  v  a2  s.  c om
 * @param seed
 * @return
 */
private static TurnTracker readTurnTrackerFromPrefs(int seed, Configuration configuration) {
    TurnTracker toReturn = null;
    String trackerName = configuration.getString("TurnTracker",
            "edu.cwru.sepia.environment.SimultaneousTurnTracker");
    Class<?> trackerClass = null;
    try {
        trackerClass = Class.forName(trackerName);
    } catch (ClassNotFoundException e) {
        logger.log(Level.SEVERE, "Unable to find class for TurnTracker " + trackerName, e);
    }
    try {
        toReturn = (TurnTracker) trackerClass.getConstructor(Random.class).newInstance(new Random(seed));
    } catch (Exception e) {
        try {
            toReturn = (TurnTracker) trackerClass.getConstructor().newInstance();
        } catch (Exception e1) {
            logger.log(Level.SEVERE, "Unable to create an instance of TurnTracker " + trackerName, e);
        }
    }
    if (toReturn == null) {
        logger.info("No TurnTracker was specified or instantiation failed; using SimultaneousTurnTracker");
        return new SimultaneousTurnTracker(new Random(seed));
    } else
        return toReturn;
}

From source file:com.open.cas.shiro.util.ReflectionUtils.java

public static Object newInstance(Class clazz, Object[] args, Class[] argsClass) {
    try {/*  w  w  w  . j  av a2  s. c  o m*/
        Constructor cons = clazz.getConstructor(argsClass);
        return cons.newInstance(args);
    } catch (Exception e) {
        throw convertReflectionExceptionToUnchecked(e);
    }
}

From source file:fr.mby.saml2.sp.impl.helper.SecurityHelper.java

/**
 * Build a private Key from DER resource.
 * //from   w  w w. j a va2 s .  co  m
 * @param certificate
 *            the DER resource
 * @param pkSpecClass
 *            the java key specification class
 * @param type
 *            the certificate type
 * @return the java.security.cert.Certificate
 * @throws NoSuchMethodException
 * @throws SecurityException
 * @throws InvocationTargetException
 * @throws IllegalAccessException
 * @throws InstantiationException
 * @throws IllegalArgumentException
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeySpecException
 * @throws IOException
 */
public static PrivateKey buildPrivateKey(final Resource privateKey, final Class<EncodedKeySpec> pkSpecClass,
        final String type) throws SecurityException, NoSuchMethodException, IllegalArgumentException,
        InstantiationException, IllegalAccessException, InvocationTargetException, NoSuchAlgorithmException,
        InvalidKeySpecException, IOException {
    PrivateKey result = null;

    final Constructor<EncodedKeySpec> keySpecConstructor = pkSpecClass.getConstructor(byte[].class);
    final byte[] keyBytes = SecurityHelper.readBytesFromFilePath(privateKey);
    if (keyBytes != null) {
        final EncodedKeySpec keySpec = keySpecConstructor.newInstance(keyBytes);
        final KeyFactory pkFactory = KeyFactory.getInstance(type);
        result = pkFactory.generatePrivate(keySpec);
    }

    return result;
}

From source file:com.inmobi.messaging.consumer.databus.AbstractMessagingDatabusConsumer.java

public static CheckpointProvider createCheckpointProvider(String checkpointProviderClassName,
        String chkpointDir) {/*from www. ja v a  2  s.  c om*/
    CheckpointProvider chkProvider = null;
    try {
        Class<?> clazz = Class.forName(checkpointProviderClassName);
        Constructor<?> constructor = clazz.getConstructor(String.class);
        chkProvider = (CheckpointProvider) constructor.newInstance(new Object[] { chkpointDir });
    } catch (Exception e) {
        throw new IllegalArgumentException(
                "Could not create checkpoint provider " + checkpointProviderClassName, e);
    }
    return chkProvider;
}

From source file:info.papdt.blacklight.api.BaseApi.java

protected static <T> T request(String token, String url, WeiboParameters params, String method,
        Class<T> jsonClass) throws Exception {
    if (token == null) {
        return null;
    } else {//from w ww  . j  a v  a2s.c o  m
        params.put("access_token", token);
        String jsonData = HttpUtility.doRequest(url, params, method);

        if (DEBUG) {
            Log.d(TAG, "jsonData = " + jsonData);
        }

        if (jsonData != null && (jsonData.contains("{") || jsonData.contains("["))) {
            return jsonClass.getConstructor(String.class).newInstance(jsonData);
        } else {
            return null;
        }
    }
}

From source file:ezbake.thrift.ThriftUtils.java

@SuppressWarnings("unchecked")
public static <Y extends TServiceClient> Y getClient(Class<Y> clazz, HostAndPort hostAndPort, String securityId,
        Properties properties) throws NoSuchMethodException, TException, Exception {
    final Constructor<?> constructor = clazz.getConstructor(TProtocol.class);
    final Object ds = constructor.newInstance(getProtocol(hostAndPort, securityId, properties));
    return (Y) ds;
}