Example usage for java.lang.reflect Array getLength

Introduction

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

Prototype

@HotSpotIntrinsicCandidate
public static native int getLength(Object array) throws IllegalArgumentException;

Source Link

Document

Returns the length of the specified array object, as an int .

Usage

From source file:Main.java

/**
 * Checks if the specified collection/array/iterator is empty.
 * <p>/* w  w w  .  j a v a 2 s .  com*/
 * This method can handles objects as follows
 * <ul>
 * <li>Collection - via collection isEmpty
 * <li>Map - via map isEmpty
 * <li>Array - using array size
 * <li>Iterator - via hasNext
 * <li>Enumeration - via hasMoreElements
 * </ul>
 * <p>
 * Note: This method is named to avoid clashing with
 * {@link #isEmpty(Collection)}.
 *
 * @param object  the object to get the size of, may be null
 * @return true if empty or null
 * @throws IllegalArgumentException thrown if object is not recognised
 * @since 3.2
 */
public static boolean sizeIsEmpty(final Object object) {
    if (object == null) {
        return true;
    } else if (object instanceof Collection<?>) {
        return ((Collection<?>) object).isEmpty();
    } else if (object instanceof Map<?, ?>) {
        return ((Map<?, ?>) object).isEmpty();
    } else if (object instanceof Object[]) {
        return ((Object[]) object).length == 0;
    } else if (object instanceof Iterator<?>) {
        return ((Iterator<?>) object).hasNext() == false;
    } else if (object instanceof Enumeration<?>) {
        return ((Enumeration<?>) object).hasMoreElements() == false;
    } else {
        try {
            return Array.getLength(object) == 0;
        } catch (final IllegalArgumentException ex) {
            throw new IllegalArgumentException("Unsupported object type: " + object.getClass().getName());
        }
    }
}

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From source file:com.chadekin.jadys.commons.formatters.ArrayValueFormatter.java

@Override
public String format(Object value) {
    String result = StringUtils.EMPTY;
    if (value != null) {
        List convertedValue = Lists.newArrayList();
        for (int index = 0; index < Array.getLength(value); index++) {
            convertedValue.add(Array.get(value, index));
        }/*  w  w w . j ava  2s .  c  o m*/
        result = super.format(convertedValue);
    }
    return result;
}

---

From source file:com.espertech.esper.epl.expression.dot.ExprDotEvalArraySize.java

public Object evaluate(Object target, EventBean[] eventsPerStream, boolean isNewData,
        ExprEvaluatorContext exprEvaluatorContext) {
    if (target == null) {
        return null;
    }/*  w  ww.  j  av  a 2 s.  c om*/
    return Array.getLength(target);
}

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From source file:mil.jpeojtrs.sca.util.PrimitiveArrayUtils.java

public static long[] convertToLongArray(final Object array) {
    if (array == null) {
        return null;
    }/*w w w .  j  a  va2 s  . c o  m*/
    if (array instanceof long[]) {
        return (long[]) array;
    }
    if (array instanceof Long[]) {
        return ArrayUtils.toPrimitive((Long[]) array);
    }
    final long[] newArray = new long[Array.getLength(array)];
    for (int i = 0; i < newArray.length; i++) {
        final Number val = (Number) Array.get(array, i);
        newArray[i] = val.longValue();
    }
    return newArray;
}

---

From source file:de.ncoder.sensorsystem.android.logging.JSONUtils.java

public static Object wrap(Object o) {
    if (o == null) {
        return JSONObject.NULL;
    } else if (o instanceof JSONArray || o instanceof JSONObject) {
        return o;
    } else if (o.equals(JSONObject.NULL)) {
        return o;
    } else if (o instanceof Boolean || o instanceof Byte || o instanceof Character || o instanceof Double
            || o instanceof Float || o instanceof Integer || o instanceof Long || o instanceof Short) {
        return o;
    } else if (o instanceof CharSequence) {
        return JSONObject.quote(o.toString());
    } else if (o instanceof Collection) {
        return new JSONArray((Collection) o);
    } else if (o.getClass().isArray()) {
        final int length = Array.getLength(o);
        List<Object> values = new ArrayList<>(length);
        for (int i = 0; i < length; ++i) {
            values.add(wrap(Array.get(o, i)));
        }//from   ww w . j a  v a2 s . c o m
        return new JSONArray(values);
    } else if (o instanceof Map) {
        return new JSONObject((Map) o);
    } else if (o instanceof Location) {
        return wrapLocation((Location) o);
    } else if (o instanceof Bundle) {
        return wrapBundle((Bundle) o);
    }
    return o.toString();
}

---

From source file:Main.java

/**
 * Checks if the specified collection/array/iterator is empty.
 * <p>//from  w w w  .ja v a  2s. co m
 * This method can handles objects as follows
 * <ul>
 * <li>Collection - via collection isEmpty
 * <li>Map - via map isEmpty
 * <li>Array - using array size
 * <li>Iterator - via hasNext
 * <li>Enumeration - via hasMoreElements
 * </ul>
 * <p>
 * Note: This method is named to avoid clashing with
 * {@link #isEmpty(Collection)}.
 *
 * @param object  the object to get the size of, not null
 * @return true if empty
 * @throws IllegalArgumentException thrown if object is not recognised or null
 * @since Commons Collections 3.2
 */
public static boolean sizeIsEmpty(Object object) {
    if (object instanceof Collection) {
        return ((Collection) object).isEmpty();
    } else if (object instanceof Map) {
        return ((Map) object).isEmpty();
    } else if (object instanceof Object[]) {
        return ((Object[]) object).length == 0;
    } else if (object instanceof Iterator) {
        return ((Iterator) object).hasNext() == false;
    } else if (object instanceof Enumeration) {
        return ((Enumeration) object).hasMoreElements() == false;
    } else if (object == null) {
        throw new IllegalArgumentException("Unsupported object type: null");
    } else {
        try {
            return Array.getLength(object) == 0;
        } catch (IllegalArgumentException ex) {
            throw new IllegalArgumentException("Unsupported object type: " + object.getClass().getName());
        }
    }
}

---

From source file:at.alladin.rmbt.qos.testscript.SystemApi.java

public int getCount(Object array) {
    if (array != null && array.getClass().isArray()) {
        return Array.getLength(array);
    }/*from   ww w .  jav  a2s  .com*/

    return 0;
}

---

From source file:com.base.dao.sql.ReflectionUtils.java

public static Object convertValue(Object value, Class toType) {
    Object result = null;// ww w . j  a v a 2s. c o m
    if (value != null) {
        if (value.getClass().isArray() && toType.isArray()) {
            Class componentType = toType.getComponentType();
            result = Array.newInstance(componentType, Array.getLength(value));
            for (int i = 0, icount = Array.getLength(value); i < icount; i++) {
                Array.set(result, i, convertValue(Array.get(value, i), componentType));
            }
        } else {
            if ((toType == Integer.class) || (toType == Integer.TYPE))
                result = Integer.valueOf((int) longValue(value));
            if ((toType == Double.class) || (toType == Double.TYPE))
                result = new Double(doubleValue(value));
            if ((toType == Boolean.class) || (toType == Boolean.TYPE))
                result = booleanValue(value) ? Boolean.TRUE : Boolean.FALSE;
            if ((toType == Byte.class) || (toType == Byte.TYPE))
                result = Byte.valueOf((byte) longValue(value));
            if ((toType == Character.class) || (toType == Character.TYPE))
                result = new Character((char) longValue(value));
            if ((toType == Short.class) || (toType == Short.TYPE))
                result = Short.valueOf((short) longValue(value));
            if ((toType == Long.class) || (toType == Long.TYPE))
                result = Long.valueOf(longValue(value));
            if ((toType == Float.class) || (toType == Float.TYPE))
                result = new Float(doubleValue(value));
            if (toType == BigInteger.class)
                result = bigIntValue(value);
            if (toType == BigDecimal.class)
                result = bigDecValue(value);
            if (toType == String.class)
                result = stringValue(value);
            if (toType == Date.class) {
                result = DateUtils.toDate(stringValue(value));
            }
            if (Enum.class.isAssignableFrom(toType))
                result = enumValue((Class<Enum>) toType, value);
        }
    } else {
        if (toType.isPrimitive()) {
            result = primitiveDefaults.get(toType);
        }
    }
    return result;
}

---

From source file:ArrayListWrapper.java

public int size() {
    return Array.getLength(array);
}

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From source file:com.github.britter.beanvalidators.EmptyConstraintValidator.java

@Override
public boolean isValid(final Object value, final ConstraintValidatorContext context) {
    if (value == null) {
        return true;
    } else if (value instanceof String) {
        return StringUtils.isEmpty((String) value);
    } else if (value instanceof Collection) {
        return ((Collection) value).isEmpty();
    } else if (value instanceof Map) {
        return ((Map) value).isEmpty();
    } else if (value.getClass().isArray()) {
        return Array.getLength(value) == 0;
    } else {/*  ww w. j  a  v a2  s. c  o m*/
        // Is this the correct behavior?
        throw new ValidationException("@Empty can not be applied to objects of type " + value.getClass());
    }
}

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