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.runwaysdk.generation.loader.RunwayClassLoader.java

/**
 * Loads an array from the base component up. If an array is loaded without
 * its componentType already loaded then an error occurs. Thus it loads from
 * inside out./*from   w  w w .j  a v a2s. c o  m*/
 * 
 * @param arrayType
 */
public static Class<?> loadArray(String arrayType) {
    // Keep track of what types of array we have (an array of Integers and an
    // array of
    // Business objects, for example)
    Stack<String> baseTypes = new Stack<String>();
    String baseType = arrayType;

    Class<?> arrayClass = null;

    // This loop strips the base type out of any n-dimensional array
    while (arrayPattern.matcher(baseType).matches()) {
        if (arrayPrefix.matcher(baseType).matches()) {
            baseType = baseType.replaceFirst("\\[L", "").replace(";", "").trim();
        } else {
            baseType = baseType.replaceFirst("\\[", "");
        }
        // Add the base type to the stack
        baseTypes.push(baseType);
    }

    // We must load all base types before we can try to load arrays of those
    // types
    while (!baseTypes.isEmpty()) {
        String type = baseTypes.pop();
        Class<?> componentType;
        componentType = LoaderDecorator.load(type);
        arrayClass = Array.newInstance(componentType, 0).getClass();
    }
    return arrayClass;
}

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From source file:jp.terasoluna.fw.web.struts.form.ValidatorActionFormEx.java

/**
 * wCfbNXuv?peBl??B//from   www.j  a va2  s.  co  m
 *
 * @param name ??CfbNXtv?peB
 * @param index ??CfbNXu
 * @param value ?v?peBl
 */
@SuppressWarnings("unchecked")
public void setIndexedValue(String name, int index, Object value) {
    if (log.isDebugEnabled()) {
        log.debug("set(" + name + ", " + index + ", " + value + ") called.");
    }

    Object prop = null;
    try {
        prop = BeanUtil.getBeanProperty(this, name);
    } catch (PropertyAccessException e) {
        // DynaValidatorActionFormExdl??A
        // O????s?B
    }
    if (prop == null) {
        throw new NullPointerException("No indexed value for '" + name + "[" + index + "]'");
    } else if (prop.getClass().isArray()) {
        if (index < Array.getLength(prop)) {
            Array.set(prop, index, value);
        } else {
            // CfbNX`FbN
            ActionFormUtil.checkIndexLength(index);
            // ?VKz??
            Object newArray = Array.newInstance(prop.getClass().getComponentType(), index + 1);
            // zR|?[lgRs?[
            System.arraycopy(prop, 0, newArray, 0, Array.getLength(prop));
            // R|?[lgZbg
            Array.set(newArray, index, value);
            // Q?Rs?[
            prop = newArray;
        }
        try {
            BeanUtil.setBeanProperty(this, name, prop);
        } catch (PropertyAccessException e) {
            throw new IllegalArgumentException("Cannot set property for '" + name + "[" + index + "]'");
        }
    } else if (prop instanceof List) {
        if (index < ((List) prop).size()) {
            ((List) prop).set(index, value);
        } else {
            // CfbNX`FbN
            ActionFormUtil.checkIndexLength(index);
            Object[] oldValues = ((List) prop).toArray();
            Object[] newValues = (Object[]) Array.newInstance(oldValues.getClass().getComponentType(),
                    index + 1);
            System.arraycopy(oldValues, 0, newValues, 0, oldValues.length);
            newValues[index] = value;
            ((List) prop).clear();
            ((List) prop).addAll(Arrays.asList(newValues));
        }
        try {
            BeanUtil.setBeanProperty(this, name, prop);
        } catch (PropertyAccessException e) {
            throw new IllegalArgumentException("Cannot set property for '" + name + "[" + index + "]'");
        }
    } else {
        throw new IllegalArgumentException("Non-indexed property for '" + name + "[" + index + "]'");
    }

}

---

From source file:com.medallia.spider.api.DynamicInputImpl.java

private static Object parseSingleValue(Class<?> rt, String v, AnnotatedElement anno,
        Map<Class<?>, InputArgParser<?>> inputArgParsers) {
    if (rt.isEnum()) {
        String vlow = v.toLowerCase();
        for (Enum e : rt.asSubclass(Enum.class).getEnumConstants()) {
            if (e.name().toLowerCase().equals(vlow))
                return e;
        }/*  ww w  .  j  a  v a2  s. co m*/
        throw new AssertionError("Enum constant not found: " + v);
    } else if (rt == Integer.class) {
        // map blank strings to null
        return Strings.hasContent(v) ? Integer.valueOf(v) : null;
    } else if (rt == Integer.TYPE) {
        // primitive int must have a value
        return Integer.valueOf(v);
    } else if (rt == Long.class) {
        // map blank strings to null
        return Strings.hasContent(v) ? Long.valueOf(v) : null;
    } else if (rt == Long.TYPE) {
        // primitive long must have a value
        return Long.valueOf(v);
    } else if (rt == Double.class) {
        // map blank strings to null
        return Strings.hasContent(v) ? Double.valueOf(v) : null;
    } else if (rt == Double.TYPE) {
        // primitive double must have a value
        return Double.valueOf(v);
    } else if (rt == String.class) {
        return v;
    } else if (rt.isArray()) {
        Input.List ann = anno.getAnnotation(Input.List.class);
        if (ann == null)
            throw new AssertionError("Array type but no annotation (see " + Input.class + "): " + anno);
        String separator = ann.separator();
        String[] strVals = v.split(separator, -1);
        Class<?> arrayType = rt.getComponentType();
        Object a = Array.newInstance(arrayType, strVals.length);
        for (int i = 0; i < strVals.length; i++) {
            Array.set(a, i, parseSingleValue(arrayType, strVals[i], anno, inputArgParsers));
        }
        return a;
    } else if (inputArgParsers != null) {
        InputArgParser<?> argParser = inputArgParsers.get(rt);
        if (argParser != null) {
            return argParser.parse(v);
        }
    }
    throw new AssertionError("Unknown return type " + rt + " (val: " + v + ")");
}

---

From source file:com.espertech.esper.event.xml.XPathPropertyGetter.java

private Object castToArray(Object result) {
    if (!(result instanceof NodeList)) {
        return null;
    }/*from   ww w . ja  v a 2 s  . c  o m*/

    NodeList nodeList = (NodeList) result;
    Object array = Array.newInstance(optionalCastToType, nodeList.getLength());

    for (int i = 0; i < nodeList.getLength(); i++) {
        Object arrayItem = null;
        try {
            Node item = nodeList.item(i);
            String textContent;
            if ((item.getNodeType() == Node.ATTRIBUTE_NODE) || (item.getNodeType() == Node.ELEMENT_NODE)) {
                textContent = nodeList.item(i).getTextContent();
            } else {
                continue;
            }

            arrayItem = simpleTypeParser.parse(textContent);
        } catch (Exception ex) {
            if (log.isInfoEnabled()) {
                log.info("Parse error for text content " + nodeList.item(i).getTextContent()
                        + " for expression " + expression);
            }
        }
        Array.set(array, i, arrayItem);
    }

    return array;
}

---

From source file:com.jeeframework.util.classes.ClassUtils.java

/**
 * Replacement for <code>Class.forName()</code> that also returns Class instances
 * for primitives (like "int") and array class names (like "String[]").
 * @param name the name of the Class// w w  w  . j  av  a2s. co m
 * @param classLoader the class loader to use
 * (may be <code>null</code>, which indicates the default class loader)
 * @return Class instance for the supplied name
 * @throws ClassNotFoundException if the class was not found
 * @throws LinkageError if the class file could not be loaded
 * @see Class#forName(String, boolean, ClassLoader)
 */
public static Class forName(String name, ClassLoader classLoader) throws ClassNotFoundException, LinkageError {
    Assert.notNull(name, "Name must not be null");

    Class clazz = resolvePrimitiveClassName(name);
    if (clazz != null) {
        return clazz;
    }

    // "java.lang.String[]" style arrays
    if (name.endsWith(ARRAY_SUFFIX)) {
        String elementClassName = name.substring(0, name.length() - ARRAY_SUFFIX.length());
        Class elementClass = forName(elementClassName, classLoader);
        return Array.newInstance(elementClass, 0).getClass();
    }

    // "[Ljava.lang.String;" style arrays
    int internalArrayMarker = name.indexOf(INTERNAL_ARRAY_PREFIX);
    if (internalArrayMarker != -1 && name.endsWith(";")) {
        String elementClassName = null;
        if (internalArrayMarker == 0) {
            elementClassName = name.substring(INTERNAL_ARRAY_PREFIX.length(), name.length() - 1);
        } else if (name.startsWith("[")) {
            elementClassName = name.substring(1);
        }
        Class elementClass = forName(elementClassName, classLoader);
        return Array.newInstance(elementClass, 0).getClass();
    }

    ClassLoader classLoaderToUse = classLoader;
    if (classLoaderToUse == null) {
        classLoaderToUse = getDefaultClassLoader();
    }
    return classLoaderToUse.loadClass(name);
}

---

From source file:com.espertech.esper.epl.annotation.AnnotationUtil.java

private static Object getFinalValue(Class annotationClass, AnnotationAttribute annotationAttribute,
        Object value, EngineImportService engineImportService) throws AnnotationException {
    if (value == null) {
        if (annotationAttribute.getDefaultValue() == null) {
            throw new AnnotationException("Annotation '" + annotationClass.getSimpleName()
                    + "' requires a value for attribute '" + annotationAttribute.getName() + "'");
        }/*from w w  w. j a  va  2s .  co  m*/
        return annotationAttribute.getDefaultValue();
    }

    // handle non-array
    if (!annotationAttribute.getType().isArray()) {
        // handle primitive value
        if (!annotationAttribute.getType().isAnnotation()) {
            SimpleTypeCaster caster = SimpleTypeCasterFactory.getCaster(value.getClass(),
                    annotationAttribute.getType());
            Object finalValue = caster.cast(value);
            if (finalValue == null) {
                throw new AnnotationException("Annotation '" + annotationClass.getSimpleName() + "' requires a "
                        + annotationAttribute.getType().getSimpleName() + "-typed value for attribute '"
                        + annotationAttribute.getName() + "' but received " + "a "
                        + value.getClass().getSimpleName() + "-typed value");
            }
            return finalValue;
        } else {
            // nested annotation
            if (!(value instanceof AnnotationDesc)) {
                throw new AnnotationException("Annotation '" + annotationClass.getSimpleName() + "' requires a "
                        + annotationAttribute.getType().getSimpleName() + "-typed value for attribute '"
                        + annotationAttribute.getName() + "' but received " + "a "
                        + value.getClass().getSimpleName() + "-typed value");
            }
            return createProxy((AnnotationDesc) value, engineImportService);
        }
    }

    if (!value.getClass().isArray()) {
        throw new AnnotationException("Annotation '" + annotationClass.getSimpleName() + "' requires a "
                + annotationAttribute.getType().getSimpleName() + "-typed value for attribute '"
                + annotationAttribute.getName() + "' but received " + "a " + value.getClass().getSimpleName()
                + "-typed value");
    }

    Object array = Array.newInstance(annotationAttribute.getType().getComponentType(), Array.getLength(value));
    for (int i = 0; i < Array.getLength(value); i++) {
        Object arrayValue = Array.get(value, i);
        if (arrayValue == null) {
            throw new AnnotationException("Annotation '" + annotationClass.getSimpleName() + "' requires a "
                    + "non-null value for array elements for attribute '" + annotationAttribute.getName()
                    + "'");
        }
        SimpleTypeCaster caster = SimpleTypeCasterFactory.getCaster(arrayValue.getClass(),
                annotationAttribute.getType().getComponentType());
        Object finalValue = caster.cast(arrayValue);
        if (finalValue == null) {
            throw new AnnotationException("Annotation '" + annotationClass.getSimpleName() + "' requires a "
                    + annotationAttribute.getType().getComponentType().getSimpleName()
                    + "-typed value for array elements for attribute '" + annotationAttribute.getName()
                    + "' but received " + "a " + arrayValue.getClass().getSimpleName() + "-typed value");
        }
        Array.set(array, i, finalValue);
    }
    return array;
}

---

From source file:com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter.java

private Object doConvertToArray(Map<String, Object> context, Object o, Member member, String s, Object value,
        Class toType) {//from  ww  w .j  a v a  2 s. c om
    Object result = null;
    Class componentType = toType.getComponentType();

    if (componentType != null) {
        TypeConverter converter = getTypeConverter(context);

        if (value.getClass().isArray()) {
            int length = Array.getLength(value);
            result = Array.newInstance(componentType, length);

            for (int i = 0; i < length; i++) {
                Object valueItem = Array.get(value, i);
                Array.set(result, i, converter.convertValue(context, o, member, s, valueItem, componentType));
            }
        } else {
            result = Array.newInstance(componentType, 1);
            Array.set(result, 0, converter.convertValue(context, o, member, s, value, componentType));
        }
    }

    return result;
}

---

From source file:ArraysX.java

/**
 * Resizes the specified array. Similar to {@link #shrink}, but
 * it can enlarge and it keeps elements from the first.
 *///from w  w w.  jav  a  2s.c  o m
public static final Object resize(Object ary, int size) {
    final int oldsz = Array.getLength(ary);
    if (oldsz == size)
        return ary;

    final Object dst = Array.newInstance(ary.getClass().getComponentType(), size);
    System.arraycopy(ary, 0, dst, 0, oldsz > size ? size : oldsz);
    return dst;
}

---

From source file:com.initialxy.cordova.themeablebrowser.ThemeableBrowserUnmarshaller.java

/**
 * Given an object extracted from JSONObject field, convert it to an
 * appropriate object with type appropriate for given type so that it can be
 * assigned to the associated field of the ummarshalled object. eg.
 * JSONObject value from a JSONObject field probably needs to be
 * unmarshalled to a class instance. Double from JSONObject may need to be
 * converted to Float. etc./*from www  .  ja  v a 2  s .com*/
 *
 * @param val Value extracted from JSONObject field.
 * @param genericType Type to convert to. Must be generic type. ie. From
 *                    field.getGenericType().
 * @return Object of the given type so it can be assinged to field with
 * field.set().
 * @throws com.initialxy.cordova.themeablebrowser.ThemeableBrowserUnmarshaller.TypeMismatchException
 */
private static Object valToType(Object val, Type genericType) {
    Object result = null;
    boolean isArray = false;

    Class<?> rawType = null;
    if (genericType instanceof ParameterizedType) {
        rawType = (Class<?>) ((ParameterizedType) genericType).getRawType();
    } else if (genericType instanceof GenericArrayType) {
        rawType = List.class;
        isArray = true;
    } else {
        rawType = (Class<?>) genericType;
    }

    isArray = isArray || rawType.isArray();

    if (val != null && val != JSONObject.NULL) {
        if (rawType.isAssignableFrom(String.class)) {
            if (val instanceof String) {
                result = val;
            } else {
                throw new TypeMismatchException(rawType, val.getClass());
            }
        } else if (isPrimitive(rawType)) {
            result = convertToPrimitiveFieldObj(val, rawType);
        } else if (isArray || rawType.isAssignableFrom(List.class)) {
            if (val instanceof JSONArray) {
                Type itemType = getListItemType(genericType);
                result = JSONToList((JSONArray) val, itemType);

                if (isArray) {
                    List<?> list = (List<?>) result;

                    Class<?> itemClass = null;
                    if (itemType instanceof ParameterizedType) {
                        itemClass = (Class<?>) ((ParameterizedType) itemType).getRawType();
                    } else {
                        itemClass = (Class<?>) itemType;
                    }

                    result = Array.newInstance(itemClass, list.size());
                    int cnt = 0;
                    for (Object i : list) {
                        Array.set(result, cnt, i);
                        cnt += 1;
                    }
                }
            } else {
                throw new TypeMismatchException(JSONArray.class, val.getClass());
            }
        } else if (val instanceof JSONObject) {
            result = JSONToObj((JSONObject) val, rawType);
        }
    }

    return result;
}

---

From source file:com.vk.sdk.api.model.ParseUtils.java

/**
 * Parses array from given JSONArray./*from ww w. j  ava2 s.c  om*/
 * Supports parsing of primitive types and {@link com.vk.sdk.api.model.VKApiModel} instances.
 * @param array JSONArray to parse
 * @param arrayClass type of array field in class.
 * @return object to set to array field in class
 * @throws JSONException if given array have incompatible type with given field.
 */
private static Object parseArrayViaReflection(JSONArray array, Class arrayClass) throws JSONException {
    Object result = Array.newInstance(arrayClass.getComponentType(), array.length());
    Class<?> subType = arrayClass.getComponentType();
    for (int i = 0; i < array.length(); i++) {
        try {
            Object item = array.opt(i);
            if (VKApiModel.class.isAssignableFrom(subType) && item instanceof JSONObject) {
                VKApiModel model = (VKApiModel) subType.newInstance();
                item = model.parse((JSONObject) item);
            }
            Array.set(result, i, item);
        } catch (InstantiationException e) {
            throw new JSONException(e.getMessage());
        } catch (IllegalAccessException e) {
            throw new JSONException(e.getMessage());
        } catch (IllegalArgumentException e) {
            throw new JSONException(e.getMessage());
        }
    }
    return result;
}

---

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