Example usage for java.lang.reflect Array get

Introduction

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

Prototype

public static native Object get(Object array, int index)
        throws IllegalArgumentException, ArrayIndexOutOfBoundsException;

Source Link

Document

Returns the value of the indexed component in the specified array object.

Usage

From source file:ArrayEnumerationFactory.java

static public Enumeration makeEnumeration(final Object obj) {
    Class type = obj.getClass();/*w w  w .  ja v a  2 s  .co  m*/
    if (!type.isArray()) {
        throw new IllegalArgumentException(obj.getClass().toString());
    } else {
        return (new Enumeration() {
            int size = Array.getLength(obj);

            int cursor;

            public boolean hasMoreElements() {
                return (cursor < size);
            }

            public Object nextElement() {
                return Array.get(obj, cursor++);
            }
        });
    }
}

From source file:Main.java

public static Object combineArray(Object firstArray, Object secondArray) {
    int firstLength = Array.getLength(firstArray);
    int secondLength = Array.getLength(secondArray);
    int length = firstLength + secondLength;

    Class<?> componentType = firstArray.getClass().getComponentType();
    Object newArray = Array.newInstance(componentType, length);
    for (int i = 0; i < length; i++) {
        if (i < firstLength) {
            Array.set(newArray, i, Array.get(firstArray, i));
        } else {//from   ww  w  .  j ava  2s.  com
            Array.set(newArray, i, Array.get(secondArray, i - firstLength));
        }
    }
    return newArray;
}

From source file:Main.java

public static Object[] getArray(Object val) {
    Class<?> valKlass = val.getClass();
    Object[] outputArray = null;/*from   w w w. ja  va 2  s  .c o m*/
    for (Class<?> arrKlass : ARRAY_PRIMITIVE_TYPES) {
        if (valKlass.isAssignableFrom(arrKlass)) {
            int arrlength = Array.getLength(val);
            outputArray = new Object[arrlength];
            for (int i = 0; i < arrlength; ++i) {
                outputArray[i] = Array.get(val, i);
            }
            break;
        }
    }
    if (outputArray == null) // not primitive type array
        outputArray = (Object[]) val;
    return outputArray;
}

From source file:Main.java

public static final Object[] toObjectArray(Object obj) {
    int length = Array.getLength(obj);
    Object[] array = new Object[length];
    for (int i = 0; i < length; i++) {
        array[i] = Array.get(obj, i);
    }//from   w w w  . j av a 2s .co m
    return array;
}

From source file:Main.java

public static Object getValueFromCollection(Object collection, int index) {
    if (isArray(collection.getClass())) {
        return Array.get(collection, index);
    } else {/*  w  ww.  j  av  a  2 s.  c o  m*/
        return ((Collection<?>) collection).toArray()[index];
    }
}

From source file:Main.java

private static String[] getExternalDirs(Context context) {
    Context mContext = context.getApplicationContext();
    StorageManager mStorageManager = (StorageManager) mContext.getSystemService(Context.STORAGE_SERVICE);
    try {/*  w w  w.ja v a2s  . c  o  m*/
        Class<?> storageVolumeClazz = Class.forName("android.os.storage.StorageVolume");
        Method getVolumeList = mStorageManager.getClass().getMethod("getVolumeList");
        Method getPath = storageVolumeClazz.getMethod("getPath");
        Object result = getVolumeList.invoke(mStorageManager);
        final int length = Array.getLength(result);
        final String[] paths = new String[length];
        for (int i = 0; i < length; i++) {
            Object storageVolumeElement = Array.get(result, i);
            paths[i] = (String) getPath.invoke(storageVolumeElement);
        }
        return paths;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static Object findElementInstance(Object collection) {
    if (collection == null)
        return null;
    if (collection.getClass().isArray()) {
        for (int i = 0; i < Array.getLength(collection); i++) {
            Object o = Array.get(collection, i);
            if (o != null) {
                return o;
            }//  ww  w .jav  a  2  s  .c om
        }
    } else if (collection instanceof Collection) {
        for (Object o : ((Collection<?>) collection)) {
            if (o != null) {
                return o;
            }
        }
    }
    return null;
}

From source file:Main.java

public static List<Object> convertPrimitiveArrayToList(Object primitiveArray) {
    int length = Array.getLength(primitiveArray);
    List<Object> result = new ArrayList<Object>(length);

    // wrap and copy elements
    for (int i = 0; i < length; i++) {
        result.add(Array.get(primitiveArray, i));
    }/*from  w ww  . j a v a2  s. co m*/
    return result;
}

From source file:Main.java

public static boolean overrideClassLoader(ClassLoader cl, File dex, File opt) {
    try {//from   w ww . j av a  2 s . c  om
        ClassLoader bootstrap = cl.getParent();
        Field fPathList = BaseDexClassLoader.class.getDeclaredField("pathList");
        fPathList.setAccessible(true);
        Object pathList = fPathList.get(cl);
        Class cDexPathList = bootstrap.loadClass("dalvik.system.DexPathList");
        Field fDexElements = cDexPathList.getDeclaredField("dexElements");
        fDexElements.setAccessible(true);
        Object dexElements = fDexElements.get(pathList);
        DexClassLoader cl2 = new DexClassLoader(dex.getAbsolutePath(), opt.getAbsolutePath(), null, bootstrap);
        Object pathList2 = fPathList.get(cl2);
        Object dexElements2 = fDexElements.get(pathList2);
        Object element2 = Array.get(dexElements2, 0);
        int n = Array.getLength(dexElements) + 1;
        Object newDexElements = Array.newInstance(fDexElements.getType().getComponentType(), n);
        Array.set(newDexElements, 0, element2);
        for (int i = 0; i < n - 1; i++) {
            Object element = Array.get(dexElements, i);
            Array.set(newDexElements, i + 1, element);
        }
        fDexElements.set(pathList, newDexElements);
        return true;
    } catch (Exception e) {
        Log.e("lcast", "fail to override classloader " + cl + " with " + dex, e);
        return false;
    }
}

From source file:Main.java

public static String getAvailableStoragePath(Context context) {
    if (BASE_DIR == null) {
        try {/*from w w w .  j  a va2s.c o  m*/
            BASE_DIR = Environment.getExternalStorageDirectory().getAbsolutePath();
            StorageManager sStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);

            Class<?> smClazz = sStorageManager.getClass();
            Method listMethod = smClazz.getDeclaredMethod("getVolumeList");
            Object vlObject = listMethod.invoke(sStorageManager);

            if (vlObject.getClass().isArray()) {
                String state = null;
                String path = null;
                // Class svClazz =
                // Class.forName("android.os.storage.StorageVolume");
                Object svObject = Array.get(vlObject, 1);
                if (svObject != null) {
                    Method pathMethod = svObject.getClass().getMethod("getPath");
                    path = (String) pathMethod.invoke(svObject);

                    Method stateMethod = smClazz.getMethod("getVolumeState", new Class[] { String.class });
                    state = (String) stateMethod.invoke(sStorageManager, path);
                }

                if (path != null && state != null && state.equals(Environment.MEDIA_MOUNTED)) {
                    BASE_DIR = path;
                } else {
                    BASE_DIR = Environment.getExternalStorageDirectory().getAbsolutePath();
                }
            }
        } catch (Exception e) {
            BASE_DIR = Environment.getExternalStorageDirectory().getAbsolutePath();
        }

        return BASE_DIR;
    } else {
        return BASE_DIR;
    }

}