Example usage for java.lang.reflect Array newInstance

Introduction

In this page you can find the example usage for java.lang.reflect Array newInstance.

Prototype

public static Object newInstance(Class<?> componentType, int... dimensions)
        throws IllegalArgumentException, NegativeArraySizeException 

Source Link

Document

Creates a new array with the specified component type and dimensions.

Usage

From source file:com.opengamma.analytics.math.curve.ObjectsCurve.java

/**
 * //from   www.j  a  va  2s .com
 * @param xData A list of <i>x</i> data, not null
 * @param yData A list of <i>y</i> data, not null, contains same number of entries as <i>x</i>
 * @param isSorted Is the <i>x</i>-data sorted
 * @param name The name of the curve
 */
public ObjectsCurve(final List<T> xData, final List<U> yData, final boolean isSorted, final String name) {
    super(name);
    ArgumentChecker.notNull(xData, "x data");
    ArgumentChecker.notNull(yData, "y data");
    _n = xData.size();
    ArgumentChecker.isTrue(_n == yData.size(), "size of x data {} does not match size of y data {}", _n,
            yData.size());
    _xData = xData.toArray((T[]) Array.newInstance(xData.get(0).getClass(), 0));
    _yData = yData.toArray((U[]) Array.newInstance(yData.get(0).getClass(), 0));
    if (!isSorted) {
        ParallelArrayBinarySort.parallelBinarySort(_xData, _yData);
    }
}

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From source file:de.javakaffee.web.msm.serializer.javolution.AaltoTranscoderTest.java

@Test(enabled = false)
void testInstantiate() throws InstantiationException, IllegalAccessException, ClassNotFoundException {
    final Object instance = Class
            .forName("de.javakaffee.web.msm.MemcachedBackupSessionManager$MemcachedBackupSession")
            .newInstance();/*from  w  w w  . j  a v a 2s  . c om*/
    System.out.println("got instance: " + instance);

    System.out.println(ConcurrentHashMap.class.isAssignableFrom(Map.class));
    System.out.println(Map.class.isAssignableFrom(ConcurrentHashMap.class));
    System.out.println(Integer.class.isAssignableFrom(Number.class));
    System.out.println(Number.class.isAssignableFrom(Integer.class));
    System.out.println(String[].class.isArray());

    final String[] foo = new String[] { "foo" };
    System.out.println(foo.getClass().getComponentType());

    System.out.println(((String[]) Array.newInstance(Class.forName("java.lang.String"), 0)).length);

    System.out.println(Class.forName("java.util.Arrays$ArrayList"));
    System.out
            .println(Class.forName("de.javakaffee.web.msm.serializer.xstream.JavolutionTranscoderTest$Person"));

}

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From source file:com.g3net.tool.ObjectUtils.java

/**
 * Convert the given array (which may be a primitive array) to an
 * object array (if necessary of primitive wrapper objects).
 * <p>A <code>null</code> source value will be converted to an
 * empty Object array.//from ww w. j av a  2  s .  c o m
 * @param source the (potentially primitive) array
 * @return the corresponding object array (never <code>null</code>)
 * @throws IllegalArgumentException if the parameter is not an array
 */
public static Object[] toObjectArray(Object source) {
    if (source instanceof Object[]) {
        return (Object[]) source;
    }
    if (source == null) {
        return new Object[0];
    }
    if (!source.getClass().isArray()) {
        throw new IllegalArgumentException("Source is not an array: " + source);
    }

    int length = Array.getLength(source);
    if (length == 0) {
        return new Object[0];
    }
    Class wrapperType = Array.get(source, 0).getClass();
    Object[] newArray = (Object[]) Array.newInstance(wrapperType, length);
    for (int i = 0; i < length; i++) {
        newArray[i] = Array.get(source, i);
    }
    return newArray;
}

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From source file:com.day.cq.wcm.foundation.forms.MergedValueMap.java

/**
 * Converts the object to an array of the given type
 * @param obj tje object or object array
 * @param type the component type of the array
 * @return and array of type T/*from  ww  w .  ja  v  a  2  s .com*/
 */
private <T> T[] convertToArray(Object obj, Class<T> type) {
    List<T> values = new LinkedList<T>();
    if (obj.getClass().isArray()) {
        for (Object o : (Object[]) obj) {
            values.add(convert(o, type));
        }
    } else {
        values.add(convert(obj, type));
    }
    @SuppressWarnings("unchecked")
    T[] result = (T[]) Array.newInstance(type, values.size());
    return values.toArray(result);
}

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From source file:com.miranteinfo.seam.core.Init.java

@SuppressWarnings("unchecked")
private <T> T[] addToArray(Class<T> type, T listener, T[] listeners) {
    T[] newArray = (T[]) Array.newInstance(type, listeners.length + 1);
    for (int i = 0; i < listeners.length; i++)
        newArray[i] = listeners[i];//from  w w w  . ja  v a  2  s  . c om
    newArray[listeners.length] = listener;
    return newArray;
}

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From source file:com.codebullets.sagalib.storage.MemoryStorageTest.java

private TestSagaState buildState(Set<String> instanceKeys) {
    String[] keys = (String[]) Array.newInstance(String.class, instanceKeys.size());

    Iterator<String> iterator = instanceKeys.iterator();
    for (int i = 0; i < instanceKeys.size() && iterator.hasNext(); ++i) {
        keys[i] = iterator.next();//from  ww  w  . ja v  a  2s.com
    }

    return buildState(keys);
}

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From source file:org.crazydog.util.spring.ObjectUtils.java

/**
 * Append the given object to the given array, returning a new array
 * consisting of the input array contents plus the given object.
 * @param array the array to append to (can be {@code null})
 * @param obj the object to append//from ww w  .  j a v  a  2s.co  m
 * @return the new array (of the same component type; never {@code null})
 */
public static <A, O extends A> A[] addObjectToArray(A[] array, O obj) {
    Class<?> compType = Object.class;
    if (array != null) {
        compType = array.getClass().getComponentType();
    } else if (obj != null) {
        compType = obj.getClass();
    }
    int newArrLength = (array != null ? array.length + 1 : 1);
    @SuppressWarnings("unchecked")
    A[] newArr = (A[]) Array.newInstance(compType, newArrLength);
    if (array != null) {
        System.arraycopy(array, 0, newArr, 0, array.length);
    }
    newArr[newArr.length - 1] = obj;
    return newArr;
}

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From source file:com.jilk.ros.rosbridge.implementation.JSON.java

private static Object convertJSONArrayToArray(JSONArray ja, Class c, Registry<Class> r) {
    Object result = Array.newInstance(c, ja.size());
    for (int i = 0; i < ja.size(); i++) {
        Object lookup = ja.get(i);
        Object value = null;/*from  www . j a  v  a2 s .com*/
        if (lookup != null) {
            if (lookup.getClass().equals(JSONObject.class))
                value = convertJSONObjectToMessage((JSONObject) lookup, c, r);
            else if (lookup.getClass().equals(JSONArray.class)) // this is not actually allowed in ROS
                value = convertJSONArrayToArray((JSONArray) lookup, c.getComponentType(), r);
            else
                value = convertJSONPrimitiveToPrimitive(lookup, c);
            Array.set(result, i, value);
        }
    }

    return result;
}

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From source file:net.sourceforge.vulcan.web.struts.actions.ManagePluginAction.java

public final ActionForward add(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response) throws Exception {

    final PluginConfigForm configForm = (PluginConfigForm) form;
    final String target = configForm.getTarget();

    final BeanWrapper bw = new BeanWrapperImpl(form);

    final Class<?> type = PropertyUtils.getPropertyType(form, target).getComponentType();
    final int i;

    Object[] array = (Object[]) bw.getPropertyValue(target);

    if (array == null) {
        array = (Object[]) Array.newInstance(type, 1);
        i = 0;/*  ww w.  j  a v  a  2  s.c om*/
    } else {
        i = array.length;
        Object[] tmp = (Object[]) Array.newInstance(type, i + 1);
        System.arraycopy(array, 0, tmp, 0, i);
        array = tmp;
    }

    array[i] = stateManager.getPluginManager().createObject(configForm.getPluginId(), type.getName());

    bw.setPropertyValue(target, array);

    configForm.setFocus(target + "[" + i + "]");
    configForm.introspect(request);

    setHelpAttributes(request, configForm);

    return mapping.findForward("configure");
}

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From source file:com.microsoft.tfs.core.internal.db.DBStatement.java

/**
 * Convenience query that returns an array of a primitive component type.
 *//* www . jav  a  2s  .  c o  m*/
public Object executeQueryForPrimitiveArray(final Object params, final Class primitiveType) {
    if (primitiveType == null || !primitiveType.isPrimitive()) {
        throw new IllegalArgumentException("primitiveType must be a non-null primitive type"); //$NON-NLS-1$
    }

    final List results = new ArrayList();

    executeQuery(params, new ResultHandler() {
        @Override
        public void handleRow(final ResultSet rset) throws SQLException {
            results.add(rset.getObject(1));
        }
    });

    final int len = results.size();
    final Object returnArray = Array.newInstance(primitiveType, len);

    for (int i = 0; i < len; i++) {
        Array.set(returnArray, i, results.get(i));
    }

    return returnArray;
}

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