Example usage for java.lang Class getDeclaredConstructor

Introduction

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

Prototype

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

Source Link

Document

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

Usage

From source file:org.apache.hadoop.mapred.lib.CombineFileRecordReader.java

/**
 * A generic RecordReader that can hand out different recordReaders
 * for each chunk in the CombineFileSplit.
 */// w w  w. ja  va 2  s  .  c o m
public CombineFileRecordReader(JobConf job, CombineFileSplit split, Reporter reporter,
        Class<RecordReader<K, V>> rrClass) throws IOException {
    this.split = split;
    this.jc = job;
    this.rrClass = rrClass;
    this.reporter = reporter;
    this.idx = 0;
    this.curReader = null;
    this.progress = 0;

    try {
        rrConstructor = rrClass.getDeclaredConstructor(constructorSignature);
        rrConstructor.setAccessible(true);
    } catch (Exception e) {
        throw new RuntimeException(rrClass.getName() + " does not have valid constructor", e);
    }
    initNextRecordReader();
}

---

From source file:org.jtester.utility.ReflectionUtils.java

/**
 * Creates an instance of the given type
 * // ww  w .j av a2  s  .  c o  m
 * @param <T>
 *            The type of the instance
 * @param type
 *            The type of the instance
 * @param bypassAccessibility
 *            If true, no exception is thrown if the parameterless
 *            constructor is not public
 * @param argumentTypes
 *            The constructor arg types, not null
 * @param arguments
 *            The constructor args, not null
 * @return An instance of this type
 * @throws JTesterException
 *             If an instance could not be created
 */
@SuppressWarnings("rawtypes")
public static <T> T createInstanceOfType(Class<T> type, boolean bypassAccessibility, Class[] argumentTypes,
        Object[] arguments) {

    if (type.isMemberClass() && !isStatic(type.getModifiers())) {
        throw new JTesterException(
                "Creation of an instance of a non-static innerclass is not possible using reflection. The type "
                        + type.getSimpleName()
                        + " is only known in the context of an instance of the enclosing class "
                        + type.getEnclosingClass().getSimpleName()
                        + ". Declare the innerclass as static to make construction possible.");
    }
    try {
        Constructor<T> constructor = type.getDeclaredConstructor(argumentTypes);
        if (bypassAccessibility) {
            constructor.setAccessible(true);
        }
        return constructor.newInstance(arguments);

    } catch (InvocationTargetException e) {
        throw new JTesterException("Error while trying to create object of class " + type.getName(),
                e.getCause());

    } catch (Exception e) {
        throw new JTesterException("Error while trying to create object of class " + type.getName(), e);
    }
}

---

From source file:org.polymap.core.runtime.DefaultSessionContext.java

public final <T> T sessionSingleton(final Class<T> type) {
    assert type != null;
    checkDestroyed();//from   ww w.  j  av a2 s.  c  om
    try {
        T result = (T) attributes.get(type.getName());
        if (result == null) {

            // create an instance (without write lock)
            Constructor constructor = type.getDeclaredConstructor(new Class[] {});
            if (constructor.isAccessible()) {
                result = type.newInstance();
            } else {
                constructor.setAccessible(true);
                result = (T) constructor.newInstance(new Object[] {});
            }

            Object old = attributes.putIfAbsent(type.getName(), result);
            // as there is no lock we have to check after put what object was added actually
            result = old != null ? (T) old : result;
        }
        return result;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:org.javascool.compiler.ProgletCodeCompiler.java

/**
 * Cherche si la proglet dfinit un Translator. Permet d'acceder aux translators des package du Classpath.
 *
 * @param progletName L'identificateur de la proglet
 * @return Le Translator  utiliser pour cette proglet
 *//*from  w  w  w .  j  ava2s. c  o m*/
protected JVSTranslator getTranslatorForProglet(String progletName) {
    if (!isDefaultProglet(progletName)) {
        try {
            Class<?> translatorClass = ProgletCodeCompiler.class.getClassLoader()
                    .loadClass("org.javascool.proglets." + this.proglet + ".Translator");
            translator = (JVSTranslator) translatorClass.getDeclaredConstructor(File.class)
                    .newInstance(jvsFile);
        } catch (ClassNotFoundException e) {
            Logger.getAnonymousLogger().log(Level.INFO, "Aucun Translator pour " + progletName);
        } // Dans ce cas on ne fais rien car il n'y a pas de Functions.java
        catch (Exception e) {
            throw new IllegalStateException("Impossible de crer un translator.");
        }
    }
    try {
        return new DefaultJVSTranslator(jvsFile);
    } catch (IOException e) {
        throw new IllegalStateException("Impossible de crer un translator sur le fichier  ouvrir");
    }
}

---

From source file:edu.cornell.mannlib.vitro.webapp.rdfservice.filter.LanguageFilteringRDFServiceTest.java

private Object buildRowIndexedLiteral(String language) {
    try {/*from w  w  w. jav a2  s .c o  m*/
        Class<?> clazz = Class.forName(RIL_CLASSNAME);
        Class<?>[] argTypes = { LanguageFilteringRDFService.class, Literal.class, Integer.TYPE };
        Constructor<?> constructor = clazz.getDeclaredConstructor(argTypes);
        constructor.setAccessible(true);

        Literal l = new LiteralStub(language);
        int i = literalIndex++;
        return constructor.newInstance(filteringRDFService, l, i);
    } catch (Exception e) {
        throw new RuntimeException("Could not create a row-indexed literal", e);
    }
}

---

From source file:com.facebook.stetho.json.ObjectMapper.java

private <T> T _convertFromJSONObject(JSONObject jsonObject, Class<T> type) throws NoSuchMethodException,
        IllegalAccessException, InvocationTargetException, InstantiationException, JSONException {
    Constructor<T> constructor = type.getDeclaredConstructor((Class[]) null);
    constructor.setAccessible(true);//from w  w w.j  a  v  a2s .  c  o  m
    T instance = constructor.newInstance();
    Field[] fields = type.getFields();
    for (int i = 0; i < fields.length; ++i) {
        Field field = fields[i];
        Object value = jsonObject.opt(field.getName());
        Object setValue = getValueForField(field, value);
        try {
            field.set(instance, getValueForField(field, value));
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("Class: " + type.getSimpleName() + " " + "Field: "
                    + field.getName() + " type " + setValue.getClass().getName(), e);
        }
    }
    return instance;
}

---

From source file:com.taobao.weex.devtools.json.ObjectMapper.java

private <T> T _convertFromJSONObject(JSONObject jsonObject, Class<T> type) throws NoSuchMethodException,
        IllegalAccessException, InvocationTargetException, InstantiationException, JSONException {
    Constructor<T> constructor = type.getDeclaredConstructor((Class[]) null);
    constructor.setAccessible(true);//from   w  ww . j a va 2s .  co  m
    T instance = constructor.newInstance();
    Field[] fields = type.getFields();
    for (int i = 0; i < fields.length; ++i) {
        Field field = fields[i];
        Object value = jsonObject.opt(field.getName());
        Object setValue = getValueForField(field, value);
        try {
            field.set(instance, setValue);
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("Class: " + type.getSimpleName() + " " + "Field: "
                    + field.getName() + " type " + setValue.getClass().getName(), e);
        }
    }
    return instance;
}

---

From source file:com.likya.myra.jef.utils.JobQueueOperations.java

public static JobImpl transformJobTypeToImpl(AbstractJobType abstractJobType) {

    String handlerUri = abstractJobType.getHandlerURI();

    Class<?> abstractClass;
    try {// w  ww.j a  v a2 s . co m
        // abstractClass = Class.forName("com.likya.myra.jef.jobs.ExecuteInShell");
        abstractClass = Class.forName(handlerUri);
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
        return null;
    }

    // levelize the initial state according to trigger value

    Management management = abstractJobType.getManagement();

    JobHelper.evaluateTriggerType(abstractJobType, false);

    // remove the difference between borned and planned time 
    management.getTimeManagement().getJsPlannedTime()
            .setStartTime(management.getTimeManagement().getBornedPlannedTime().getStartTime());
    management.getTimeManagement().getJsPlannedTime()
            .setStopTime(management.getTimeManagement().getBornedPlannedTime().getStopTime());

    JobRuntimeInterface jobRuntimeInterface = new JobRuntimeProperties();
    JobImpl jobImpl = null;

    try {
        jobImpl = (JobImpl) abstractClass
                .getDeclaredConstructor(new Class[] { AbstractJobType.class, JobRuntimeInterface.class })
                .newInstance(abstractJobType, jobRuntimeInterface);
        jobImpl.getJobInfo();
    } catch (InstantiationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NoSuchMethodException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SecurityException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    //         switch (jobType) {
    //         case JobCommandType.INT_BATCH_PROCESS:
    //            jobImpl = new ExecuteInShell(simpleProperties, jobRuntimeInterface);
    //            ((ExecuteInShell) jobImpl).setShell(true);
    //            break;
    //         case JobCommandType.INT_SYSTEM_COMMAND:
    //            jobImpl = new ExecuteInShell(simpleProperties, jobRuntimeInterface);
    //            ((ExecuteInShell) jobImpl).setShell(false);
    //            break;
    //         case JobCommandType.INT_REMOTE_SHELL:
    //            jobImpl = new ExecuteInShell(simpleProperties, jobRuntimeInterface);
    //            break;
    //
    //         default:
    //            break;
    //         }

    return jobImpl;
}

---

From source file:edu.isi.wings.catalog.component.api.impl.kb.ComponentCreationKB.java

public ComponentCreationKB(Properties props, boolean load_concrete) {
    super(props, load_concrete, true, false, true);

    String extern = props.getProperty("extern_component_catalog");
    if (extern != null) {
        try {/*  w ww. j  ava 2 s  .  c  o m*/
            Class<?> classz = Class.forName(extern);
            ComponentCreationAPI externalCC = (ComponentCreationAPI) classz
                    .getDeclaredConstructor(Properties.class).newInstance(props);
            this.setExternalCatalog(externalCC);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

---

From source file:org.apache.hadoop.mapreduce.approx.lib.input.SampleRecordReader.java

/**
 * A generic RecordReader that can hand out different recordReaders
 * for each chunk in the SampleFileSplit.
 *//*from www  .  java  2 s  .co m*/
public SampleRecordReader(SampleFileSplit split, TaskAttemptContext context,
        Class<? extends RecordReader<K, V>> rrClass) throws IOException {
    this.split = split;
    this.context = context;
    this.rrClass = rrClass;
    this.idx = 0;
    this.curReader = null;
    this.progress = 0;

    try {
        rrConstructor = rrClass.getDeclaredConstructor(constructorSignature);
        rrConstructor.setAccessible(true);
    } catch (Exception e) {
        throw new RuntimeException(rrClass.getName() + " does not have valid constructor", e);
    }
    initNextRecordReader();
}

---

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