Example usage for java.lang.reflect Array getLength

List of usage examples for java.lang.reflect Array getLength

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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:org.apache.axis.utils.BeanPropertyDescriptor.java

/**
 * Set an indexed property value/*  w w  w. j  av  a2  s. co m*/
 * @param obj is the object
 * @param i the index
 * @param newValue is the new value
 */
public void set(Object obj, int i, Object newValue) throws InvocationTargetException, IllegalAccessException {
    // Set the new value
    if (isIndexed()) {
        IndexedPropertyDescriptor id = (IndexedPropertyDescriptor) myPD;
        growArrayToSize(obj, id.getIndexedPropertyType(), i);
        id.getIndexedWriteMethod().invoke(obj, new Object[] { new Integer(i), newValue });
    } else {
        // Not calling 'growArrayToSize' to avoid an extra call to the
        // property's setter. The setter will be called at the end anyway.
        // growArrayToSize(obj, myPD.getPropertyType().getComponentType(), i);
        Object array = get(obj);
        if (array == null || Array.getLength(array) <= i) {
            Class componentType = getType().getComponentType();
            Object newArray = Array.newInstance(componentType, i + 1);
            // Copy over the old elements
            if (array != null) {
                System.arraycopy(array, 0, newArray, 0, Array.getLength(array));
            }
            array = newArray;
        }
        Array.set(array, i, newValue);
        // Fix for non-indempondent array-type propertirs.
        // Make sure we call the property's setter.
        set(obj, array);
    }
}

From source file:de.alpharogroup.lang.object.CloneObjectExtensions.java

/**
 * Try to clone the given object.//from  ww  w. jav a2  s. c o  m
 *
 * @param object
 *            The object to clone.
 * @return The cloned object or null if the clone process failed.
 * @throws NoSuchMethodException
 *             Thrown if a matching method is not found or if the name is "&lt;init&gt;"or
 *             "&lt;clinit&gt;".
 * @throws SecurityException
 *             Thrown if the security manager indicates a security violation.
 * @throws IllegalAccessException
 *             Thrown if this {@code Method} object is enforcing Java language access control
 *             and the underlying method is inaccessible.
 * @throws IllegalArgumentException
 *             Thrown if an illegal argument is given
 * @throws InvocationTargetException
 *             Thrown if the property accessor method throws an exception
 * @throws ClassNotFoundException
 *             occurs if a given class cannot be located by the specified class loader
 * @throws InstantiationException
 *             Thrown if one of the following reasons: the class object
 *             <ul>
 *             <li>represents an abstract class</li>
 *             <li>represents an interface</li>
 *             <li>represents an array class</li>
 *             <li>represents a primitive type</li>
 *             <li>represents {@code void}</li>
 *             <li>has no nullary constructor</li>
 *             </ul>
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
public static Object cloneObject(final Object object)
        throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException,
        InvocationTargetException, ClassNotFoundException, InstantiationException, IOException {
    Object clone = null;
    // Try to clone the object if it implements Serializable.
    if (object instanceof Serializable) {
        clone = SerializedObjectExtensions.copySerializedObject((Serializable) object);
        if (clone != null) {
            return clone;
        }
    }
    // Try to clone the object if it is Cloneble.
    if (clone == null && object instanceof Cloneable) {

        if (object.getClass().isArray()) {
            final Class<?> componentType = object.getClass().getComponentType();
            if (componentType.isPrimitive()) {
                int length = Array.getLength(object);
                clone = Array.newInstance(componentType, length);
                while (length-- > 0) {
                    Array.set(clone, length, Array.get(object, length));
                }
            } else {
                clone = ((Object[]) object).clone();
            }
            if (clone != null) {
                return clone;
            }
        }
        final Class<?> clazz = object.getClass();
        final Method cloneMethod = clazz.getMethod("clone", (Class[]) null);
        clone = cloneMethod.invoke(object, (Object[]) null);
        if (clone != null) {
            return clone;
        }
    }
    // Try to clone the object by copying all his properties with
    // the BeanUtils.copyProperties() method.
    if (clone == null) {
        clone = ReflectionExtensions.getNewInstance(object);
        BeanUtils.copyProperties(clone, object);
    }
    return clone;
}

From source file:es.caib.zkib.jxpath.util.ValueUtils.java

/**
 * Grows the collection if necessary to the specified size. Returns
 * the new, expanded collection./*ww  w .j a  v a 2 s .  co  m*/
 * @param collection to expand
 * @param size desired size
 * @return collection or array
 */
public static Object expandCollection(Object collection, int size) {
    if (collection == null) {
        return null;
    }
    if (size < getLength(collection)) {
        throw new JXPathException("adjustment of " + collection + " to size " + size + " is not an expansion");
    }
    if (collection.getClass().isArray()) {
        Object bigger = Array.newInstance(collection.getClass().getComponentType(), size);
        System.arraycopy(collection, 0, bigger, 0, Array.getLength(collection));
        return bigger;
    }
    if (collection instanceof Collection) {
        while (((Collection) collection).size() < size) {
            ((Collection) collection).add(null);
        }
        return collection;
    }
    throw new JXPathException(
            "Cannot turn " + collection.getClass().getName() + " into a collection of size " + size);
}

From source file:de.ks.flatadocdb.defaults.ReflectionLuceneDocumentExtractor.java

private ReflectionLuceneDocumentExtractor.DocField createArrayDocField(Field f, MethodHandle getter) {
    return new DocField(f, getter, (id, value) -> {
        StringBuilder builder = new StringBuilder();

        int length = Array.getLength(value);
        for (int i = 0; i < length; i++) {
            Object element = Array.get(value, i);
            builder.append(element);/*ww w. java  2s  .c  om*/
            if (i != length - 1) {
                builder.append(", ");
            }
        }
        return new StringField(id, builder.toString(), org.apache.lucene.document.Field.Store.YES);
    });
}

From source file:com.lidroid.xutils.ViewUtils.java

@SuppressWarnings("ConstantConditions")
private static void injectObject(Object handler, ViewFinder finder) {

    Class<?> handlerType = handler.getClass();

    // inject ContentView
    ContentView contentView = handlerType.getAnnotation(ContentView.class);
    if (contentView != null) {
        try {/*from ww w. j a v  a2 s .c o m*/
            Method setContentViewMethod = handlerType.getMethod("setContentView", int.class);
            setContentViewMethod.invoke(handler, contentView.value());
        } catch (Throwable e) {
            LogUtils.e(e.getMessage(), e);
        }
    }

    // inject view
    Field[] fields = handlerType.getDeclaredFields();
    if (fields != null && fields.length > 0) {
        for (Field field : fields) {
            ViewInject viewInject = field.getAnnotation(ViewInject.class);
            if (viewInject != null) {
                try {
                    View view = finder.findViewById(viewInject.value(), viewInject.parentId());
                    if (view != null) {
                        field.setAccessible(true);
                        field.set(handler, view);
                    }
                } catch (Throwable e) {
                    LogUtils.e(e.getMessage(), e);
                }
            } else {
                ResInject resInject = field.getAnnotation(ResInject.class);
                if (resInject != null) {
                    try {
                        Object res = ResLoader.loadRes(resInject.type(), finder.getContext(), resInject.id());
                        if (res != null) {
                            field.setAccessible(true);
                            field.set(handler, res);
                        }
                    } catch (Throwable e) {
                        LogUtils.e(e.getMessage(), e);
                    }
                } else {
                    PreferenceInject preferenceInject = field.getAnnotation(PreferenceInject.class);
                    if (preferenceInject != null) {
                        try {
                            Preference preference = finder.findPreference(preferenceInject.value());
                            if (preference != null) {
                                field.setAccessible(true);
                                field.set(handler, preference);
                            }
                        } catch (Throwable e) {
                            LogUtils.e(e.getMessage(), e);
                        }
                    }
                }
            }
        }
    }

    // inject event
    Method[] methods = handlerType.getDeclaredMethods();
    if (methods != null && methods.length > 0) {
        for (Method method : methods) {
            Annotation[] annotations = method.getDeclaredAnnotations();
            if (annotations != null && annotations.length > 0) {
                for (Annotation annotation : annotations) {
                    Class<?> annType = annotation.annotationType();
                    if (annType.getAnnotation(EventBase.class) != null) {
                        method.setAccessible(true);
                        try {
                            // ProGuard-keep class * extends java.lang.annotation.Annotation { *; }
                            Method valueMethod = annType.getDeclaredMethod("value");
                            Method parentIdMethod = null;
                            try {
                                parentIdMethod = annType.getDeclaredMethod("parentId");
                            } catch (Throwable e) {
                            }
                            Object values = valueMethod.invoke(annotation);
                            Object parentIds = parentIdMethod == null ? null
                                    : parentIdMethod.invoke(annotation);
                            int parentIdsLen = parentIds == null ? 0 : Array.getLength(parentIds);
                            int len = Array.getLength(values);
                            for (int i = 0; i < len; i++) {
                                ViewInjectInfo info = new ViewInjectInfo();
                                info.value = Array.get(values, i);
                                info.parentId = parentIdsLen > i ? (Integer) Array.get(parentIds, i) : 0;
                                EventListenerManager.addEventMethod(finder, info, annotation, handler, method);
                            }
                        } catch (Throwable e) {
                            LogUtils.e(e.getMessage(), e);
                        }
                    }
                }
            }
        }
    }
}

From source file:com.zhoukl.androidRDP.RdpUtils.RdpAnnotationUtil.java

@SuppressWarnings("ConstantConditions")
private static void injectObject(Object handler, ViewFinder finder) {

    Class<?> handlerType = handler.getClass();

    // inject ContentView
    ContentView contentView = handlerType.getAnnotation(ContentView.class);
    if (contentView != null) {
        try {//from   ww w . j  a v a  2s  .  co  m
            Method setContentViewMethod = handlerType.getMethod("setContentView", int.class);
            setContentViewMethod.invoke(handler, contentView.value());
        } catch (Throwable e) {
            //LogUtils.e(e.getMessage(), e);
        }
    }

    // inject view
    Field[] fields = handlerType.getDeclaredFields();
    if (fields != null && fields.length > 0) {
        for (Field field : fields) {
            ViewInject viewInject = field.getAnnotation(ViewInject.class);
            if (viewInject != null) {
                try {
                    View view = finder.findViewById(viewInject.value(), viewInject.parentId());
                    if (view != null) {
                        field.setAccessible(true);
                        field.set(handler, view);
                    }
                } catch (Throwable e) {
                    //LogUtils.e(e.getMessage(), e);
                }
            } else {
                ResInject resInject = field.getAnnotation(ResInject.class);
                if (resInject != null) {
                    try {
                        Object res = ResLoader.loadRes(resInject.type(), finder.getContext(), resInject.id());
                        if (res != null) {
                            field.setAccessible(true);
                            field.set(handler, res);
                        }
                    } catch (Throwable e) {
                        //LogUtils.e(e.getMessage(), e);
                    }
                } else {
                    PreferenceInject preferenceInject = field.getAnnotation(PreferenceInject.class);
                    if (preferenceInject != null) {
                        try {
                            Preference preference = finder.findPreference(preferenceInject.value());
                            if (preference != null) {
                                field.setAccessible(true);
                                field.set(handler, preference);
                            }
                        } catch (Throwable e) {
                            //LogUtils.e(e.getMessage(), e);
                        }
                    }
                }
            }
        }
    }

    // inject event
    Method[] methods = handlerType.getDeclaredMethods();
    if (methods != null && methods.length > 0) {
        for (Method method : methods) {
            Annotation[] annotations = method.getDeclaredAnnotations();
            if (annotations != null && annotations.length > 0) {
                for (Annotation annotation : annotations) {
                    Class<?> annType = annotation.annotationType();
                    if (annType.getAnnotation(EventBase.class) != null) {
                        method.setAccessible(true);
                        try {
                            // ProGuard-keep class * extends java.lang.annotation.Annotation { *; }
                            Method valueMethod = annType.getDeclaredMethod("value");
                            Method parentIdMethod = null;
                            try {
                                parentIdMethod = annType.getDeclaredMethod("parentId");
                            } catch (Throwable e) {
                            }
                            Object values = valueMethod.invoke(annotation);
                            Object parentIds = parentIdMethod == null ? null
                                    : parentIdMethod.invoke(annotation);
                            int parentIdsLen = parentIds == null ? 0 : Array.getLength(parentIds);
                            int len = Array.getLength(values);
                            for (int i = 0; i < len; i++) {
                                ViewInjectInfo info = new ViewInjectInfo();
                                info.value = Array.get(values, i);
                                info.parentId = parentIdsLen > i ? (Integer) Array.get(parentIds, i) : 0;
                                EventListenerManager.addEventMethod(finder, info, annotation, handler, method);
                            }
                        } catch (Throwable e) {
                            //LogUtils.e(e.getMessage(), e);
                        }
                    }
                }
            }
        }
    }
}

From source file:org.apache.struts.validator.BeanValidatorForm.java

/**
 * <p>Return the size of an indexed or mapped property.</p>
 *//*  w  w w. ja va 2 s . c o  m*/
public int size(String name) {
    Object value = dynaBean.get(name);

    if (value == null) {
        return 0;
    }

    if (value instanceof Map) {
        return ((Map) value).size();
    }

    if (value instanceof List) {
        return ((List) value).size();
    }

    if ((value.getClass().isArray())) {
        return Array.getLength(value);
    }

    return 0;
}

From source file:gda.data.scan.datawriter.scannablewriter.SingleScannableWriter.java

private final Object[] getArrayObject(final Object position) {

    if (position.getClass().isArray()) {
        final Object[] outputArray;

        if (position.getClass().getComponentType().isPrimitive()) {
            final int arrlength = Array.getLength(position);
            outputArray = new Object[arrlength];
            for (int i = 0; i < arrlength; ++i) {
                outputArray[i] = Array.get(position, i);
            }//from   w  w w. j a v  a 2 s.  c  o  m

        } else {
            outputArray = (Object[]) position;
        }

        return outputArray;

    } else {
        return new Object[] { position };
    }
}

From source file:com.google.api.server.spi.ObjectMapperUtil.java

private static boolean isEmpty(Object value) {
    Class<?> clazz = value.getClass();
    if (clazz.isArray()) {
        int len = Array.getLength(value);
        for (int i = 0; i < len; i++) {
            Object element = Array.get(value, i);
            if (element != null && !isEmpty(element)) {
                return false;
            }/*from   w  w  w .  j ava  2 s  .c om*/
        }
        return true;
    } else if (Collection.class.isAssignableFrom(clazz)) {
        Collection<?> c = (Collection<?>) value;
        for (Object element : c) {
            if (element != null && !isEmpty(element)) {
                return false;
            }
        }
        return true;
    } else if (Map.class.isAssignableFrom(clazz)) {
        Map<?, ?> m = (Map<?, ?>) value;
        for (Object entryValue : m.values()) {
            if (entryValue != null && !isEmpty(entryValue)) {
                return false;
            }
        }
        return true;
    }
    return false;
}

From source file:com.alibaba.dubbo.governance.web.common.pulltool.Tool.java

public static int countMapValues(Map<?, ?> map) {
    int total = 0;
    if (map != null && map.size() > 0) {
        for (Object value : map.values()) {
            if (value != null) {
                if (value instanceof Number) {
                    total += ((Number) value).intValue();
                } else if (value.getClass().isArray()) {
                    total += Array.getLength(value);
                } else if (value instanceof Collection) {
                    total += ((Collection<?>) value).size();
                } else if (value instanceof Map) {
                    total += ((Map<?, ?>) value).size();
                } else {
                    total += 1;//  w  ww  . j  av a2  s.  c o m
                }
            }
        }
    }
    return total;
}