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:Main.java

/**
 * Underlying implementation of add(array, index, element) methods. 
 * The last parameter is the class, which may not equal element.getClass 
 * for primitives.//from  www.  j a v  a  2  s .co  m
 *
 * @param array  the array to add the element to, may be <code>null</code>
 * @param index  the position of the new object
 * @param element  the object to add
 * @param clss the type of the element being added
 * @return A new array containing the existing elements and the new element
 */
private static Object add(Object array, int index, Object element, Class clss) {
    if (array == null) {
        if (index != 0) {
            throw new IndexOutOfBoundsException("Index: " + index + ", Length: 0");
        }
        Object joinedArray = Array.newInstance(clss, 1);
        Array.set(joinedArray, 0, element);
        return joinedArray;
    }
    int length = Array.getLength(array);
    if (index > length || index < 0) {
        throw new IndexOutOfBoundsException("Index: " + index + ", Length: " + length);
    }
    Object result = Array.newInstance(clss, length + 1);
    System.arraycopy(array, 0, result, 0, index);
    Array.set(result, index, element);
    if (index < length) {
        System.arraycopy(array, index, result, index + 1, length - index);
    }
    return result;
}

---

From source file:com.mocha.bsm.bizsm.db4otemplate.util.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</code>)
 * @param obj the Object to append/*from   w w  w .  j a  v  a2 s. co  m*/
 * @return the new array (of the same component type; never <code>null</code>)
 */
public static Object[] addObjectToArray(Object[] array, Object 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);
    Object[] newArr = (Object[]) Array.newInstance(compType, newArrLength);
    if (array != null) {
        System.arraycopy(array, 0, newArr, 0, array.length);
    }
    newArr[array.length] = obj;
    return newArr;
}

---

From source file:com.datatorrent.lib.util.KryoCloneUtils.java

/**
 * Clone array of objects from source object
 * @param num size of the return array// ww  w  .  j ava  2 s  . c  om
 * @return array of T
 */
@SuppressWarnings("unchecked")
public T[] getClones(int num) {
    T[] ts = (T[]) Array.newInstance(clazz, num);
    try (Input input = new Input(bin)) {
        for (int i = 0; i < ts.length; i++) {
            input.rewind();
            ts[i] = kryo.readObject(input, clazz);
        }
    }
    return ts;
}

---

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

/**
 * //from  www  .ja  va 2  s . c  o  m
 * @param data A map of <i>x-y</i> data, not null
 * @param isSorted Is the <i>x</i>-data sorted
 */
public ObjectsCurve(final Map<T, U> data, final boolean isSorted) {
    super();
    ArgumentChecker.noNulls(data.keySet(), "x values");
    ArgumentChecker.noNulls(data.values(), "y values");
    _n = data.size();
    final Map.Entry<T, U> firstEntry = data.entrySet().iterator().next();
    _xData = data.keySet().toArray((T[]) Array.newInstance(firstEntry.getKey().getClass(), 0));
    _yData = data.values().toArray((U[]) Array.newInstance(firstEntry.getValue().getClass(), 0));
    if (!isSorted) {
        ParallelArrayBinarySort.parallelBinarySort(_xData, _yData);
    }
}

---

From source file:fr.landel.utils.commons.CollectionUtils2.java

/**
 * To array an iterable (take the type of the first element, otherwise use
 * the default 'toArray(new T[0])'). Returns {@code null} if the iterable is
 * empty.//from  w w w.  j ava2 s.  co m
 * 
 * @param iterable
 *            The input iterable (required)
 * @param type
 *            the type of objects (optional, if null take the type of the
 *            first element)
 * @param <T>
 *            The type of object in collection
 * @return The array
 */
@SuppressWarnings("unchecked")
public static <T> T[] toArray(final Iterable<T> iterable, final Class<T> type) {
    if (!IterableUtils.isEmpty(iterable)) {
        final Iterator<T> iterator = iterable.iterator();
        final List<T> list = new ArrayList<>();
        final Set<Class<T>> classes = new HashSet<>();
        while (iterator.hasNext()) {
            final T obj = iterator.next();
            list.add(obj);
            if (obj != null) {
                classes.add(ClassUtils.getClass(obj));
            }
        }
        final Class<?> typeClass;
        if (type != null) {
            typeClass = type;
        } else if (classes.size() == 1) {
            typeClass = classes.iterator().next();
        } else {
            typeClass = Object.class;
        }
        return list.toArray((T[]) Array.newInstance(typeClass, list.size()));
    } else if (iterable != null && type != null) {
        return (T[]) Array.newInstance(type, 0);
    }
    return null;
}

---

From source file:FlipPolygon.java

private static <T, U> T[] copyOf(U[] arr, int newSize, Class<? extends T[]> newType) {
    T[] copy = ((Object) newType == (Object) Object[].class) ? (T[]) new Object[newSize]
            : (T[]) Array.newInstance(newType.getComponentType(), newSize);
    System.arraycopy(arr, 0, copy, 0, Math.min(arr.length, newSize));
    return copy;/*from w w w. jav  a2  s . co  m*/
}

---

From source file: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.// ww  w . j a va 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;
}

---

From source file:com.laxser.blitz.lama.provider.jdbc.PreparedStatementCallbackReturnId.java

@Override
public Object doInPreparedStatement(PreparedStatement ps) throws SQLException, DataAccessException {

    if (setter != null) {
        setter.setValues(ps);/*from w ww . jav a 2 s. co m*/
    }

    int updated = ps.executeUpdate();
    if (updated == 0) {
        if (returnType.isArray()) {
            return Array.newInstance(wrappedIdType, 0);
        } else {
            return defaultValueOf(wrappedIdType);
        }
    }

    ResultSet keys = ps.getGeneratedKeys();
    if (keys != null) {
        try {
            Object ret = null;
            if (returnType.isArray()) {
                keys.last();
                int length = keys.getRow();
                keys.beforeFirst();
                ret = Array.newInstance(wrappedIdType, length);
            }

            for (int i = 0; keys.next(); i++) {
                Object value = mapper.mapRow(keys, i);
                if (value == null && idType.isPrimitive()) {
                    // ?primitive??null??
                    value = defaultValueOf(wrappedIdType);
                }
                if (ret != null) {
                    Array.set(ret, i + 1, value);
                } else {
                    ret = value;
                    break;
                }
            }
            return ret;
        } finally {
            JdbcUtils.closeResultSet(keys);
        }
    } else {
        if (returnType.isArray()) {
            return Array.newInstance(wrappedIdType, 0);
        } else {
            return defaultValueOf(wrappedIdType);
        }
    }
}

---

From source file:code.elix_x.excore.utils.client.gui.elements.ListGuiElement.java

protected void reInitElements(int length) {
    this.elements = (ListGuiElement<H>.ListElement[]) Array.newInstance(ListElement.class, length);
}

---

From source file:com.espertech.esper.core.ResultDeliveryStrategyTypeArr.java

private Object convert(EventBean[] events) {
    if ((events == null) || (events.length == 0)) {
        return null;
    }//  w ww . j a  va  2 s.c  om

    Object array = Array.newInstance(componentType, events.length);
    int length = 0;
    for (int i = 0; i < events.length; i++) {
        if (events[i] instanceof NaturalEventBean) {
            NaturalEventBean natural = (NaturalEventBean) events[i];
            Array.set(array, length, natural.getNatural()[0]);
            length++;
        }
    }

    if (length == 0) {
        return null;
    }
    if (length != events.length) {
        Object reduced = Array.newInstance(componentType, events.length);
        System.arraycopy(array, 0, reduced, 0, length);
        array = reduced;
    }
    return array;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »