List of usage examples for java.lang.reflect Constructor setAccessible
@Override @CallerSensitive public void setAccessible(boolean flag)
A SecurityException is also thrown if this object is a Constructor object for the class Class and flag is true.
From source file:gov.anl.cue.arcane.engine.matrix.MatrixModel.java
/** * Run the matrix model./* www . ja va 2 s . c om*/ * * @return the double */ public Double runMatrixModel() { // Create a results holder. Double results = Double.NaN; // Attempt to run the model. try { // Setup a temporary class loader. URL[] urls = new URL[] { new File(Util.TEMP_DIR).toURI().toURL() }; URLClassLoader classLoader = new URLClassLoader(urls, null, null); // Attempt to load the compiled file. @SuppressWarnings("rawtypes") Constructor constructor = classLoader .loadClass(MatrixModel.PACKAGE_NAME + "." + MatrixModel.CONCRETE_CLASS_NAME) .getDeclaredConstructor(double.class); constructor.setAccessible(true); Object object = constructor.newInstance(this.stepSize); // Call "matrixFormulation.step(steps)". Method method = object.getClass().getSuperclass().getMethod("step", int.class); method.invoke(object, this.stepCount); // Call matrixFormulation.calculateFitnessValue(); method = object.getClass().getSuperclass().getMethod("calculateFitnessValue"); results = (Double) method.invoke(object); // Clear the given class loader, which should not be // a child of another class loader. object = null; method = null; classLoader.close(); ResourceBundle.clearCache(classLoader); classLoader = null; Introspector.flushCaches(); System.runFinalization(); System.gc(); // Catch exceptions. } catch (Exception e) { // Return the default result. results = Double.NaN; } // Return the results. return results; }
From source file:org.apache.geode.internal.InternalDataSerializer.java
/** * Instantiates an instance of {@code DataSerializer} * * @throws IllegalArgumentException If the class can't be instantiated * * @see DataSerializer#register(Class)//w w w . j a va2 s . c o m */ private static DataSerializer newInstance(Class c) { if (!DataSerializer.class.isAssignableFrom(c)) { throw new IllegalArgumentException(LocalizedStrings.DataSerializer_0_DOES_NOT_EXTEND_DATASERIALIZER .toLocalizedString(c.getName())); } Constructor init; try { init = c.getDeclaredConstructor(new Class[0]); } catch (NoSuchMethodException ignored) { StringId s = LocalizedStrings.DataSerializer_CLASS_0_DOES_NOT_HAVE_A_ZEROARGUMENT_CONSTRUCTOR; Object[] args = new Object[] { c.getName() }; if (c.getDeclaringClass() != null) { s = LocalizedStrings.DataSerializer_CLASS_0_DOES_NOT_HAVE_A_ZEROARGUMENT_CONSTRUCTOR_IT_IS_AN_INNER_CLASS_OF_1_SHOULD_IT_BE_A_STATIC_INNER_CLASS; args = new Object[] { c.getName(), c.getDeclaringClass() }; } throw new IllegalArgumentException(s.toLocalizedString(args)); } DataSerializer s; try { init.setAccessible(true); s = (DataSerializer) init.newInstance(new Object[0]); } catch (IllegalAccessException ignored) { throw new IllegalArgumentException( LocalizedStrings.DataSerializer_COULD_NOT_INSTANTIATE_AN_INSTANCE_OF_0 .toLocalizedString(c.getName())); } catch (InstantiationException ex) { throw new IllegalArgumentException( LocalizedStrings.DataSerializer_COULD_NOT_INSTANTIATE_AN_INSTANCE_OF_0 .toLocalizedString(c.getName()), ex); } catch (InvocationTargetException ex) { throw new IllegalArgumentException(LocalizedStrings.DataSerializer_WHILE_INSTANTIATING_AN_INSTANCE_OF_0 .toLocalizedString(c.getName()), ex); } return s; }
From source file:org.openTwoFactor.client.util.TwoFactorClientCommonUtils.java
/** * Construct a class//from w ww . j a v a2 s . c o m * @param <T> template type * @param theClass * @param allowPrivateConstructor true if should allow private constructors * @return the instance */ public static <T> T newInstance(Class<T> theClass, boolean allowPrivateConstructor) { if (!allowPrivateConstructor) { return newInstance(theClass); } try { Constructor<?>[] constructorArray = theClass.getDeclaredConstructors(); for (Constructor<?> constructor : constructorArray) { if (constructor.getGenericParameterTypes().length == 0) { if (allowPrivateConstructor) { constructor.setAccessible(true); } return (T) constructor.newInstance(); } } //why cant we find a constructor??? throw new RuntimeException("Why cant we find a constructor for class: " + theClass); } catch (Throwable e) { if (theClass != null && Modifier.isAbstract(theClass.getModifiers())) { throw new RuntimeException("Problem with class: " + theClass + ", maybe because it is abstract!", e); } throw new RuntimeException("Problem with class: " + theClass, e); } }
From source file:com.codename1.impl.android.AndroidImplementation.java
private String getUserAgent() { try {// ww w . j a v a 2s. co m String userAgent = System.getProperty("http.agent"); if (userAgent != null) { return userAgent; } } catch (Exception e) { } if (getActivity() == null) { return "Android-CN1"; } try { Constructor<WebSettings> constructor = WebSettings.class.getDeclaredConstructor(Context.class, WebView.class); constructor.setAccessible(true); try { WebSettings settings = constructor.newInstance(getActivity(), null); return settings.getUserAgentString(); } finally { constructor.setAccessible(false); } } catch (Exception e) { final StringBuffer ua = new StringBuffer(); if (Thread.currentThread().getName().equalsIgnoreCase("main")) { WebView m_webview = new WebView(getActivity()); ua.append(m_webview.getSettings().getUserAgentString()); m_webview.destroy(); } else { final boolean[] flag = new boolean[1]; Thread thread = new Thread() { public void run() { Looper.prepare(); WebView m_webview = new WebView(getActivity()); ua.append(m_webview.getSettings().getUserAgentString()); m_webview.destroy(); Looper.loop(); flag[0] = true; synchronized (flag) { flag.notify(); } } }; thread.setUncaughtExceptionHandler(AndroidImplementation.exceptionHandler); thread.start(); while (!flag[0]) { synchronized (flag) { try { flag.wait(100); } catch (InterruptedException ex) { } } } } return ua.toString(); } }
From source file:android.support.v71.widget.RecyclerView.java
/** * Instantiate and set a LayoutManager, if specified in the attributes. * LayotManager// w w w .j av a2 s . c o m */ private void createLayoutManager(Context context, String className, AttributeSet attrs, int defStyleAttr, int defStyleRes) { if (className != null) { className = className.trim(); if (className.length() != 0) { // Can't use isEmpty since it was added in API 9. className = getFullClassName(context, className); try { ClassLoader classLoader; if (isInEditMode()) { // Stupid layoutlib cannot handle simple class loaders. classLoader = this.getClass().getClassLoader(); } else { classLoader = context.getClassLoader(); } Class<? extends LayoutManager> layoutManagerClass = classLoader.loadClass(className) .asSubclass(LayoutManager.class); Constructor<? extends LayoutManager> constructor; Object[] constructorArgs = null; try { constructor = layoutManagerClass.getConstructor(LAYOUT_MANAGER_CONSTRUCTOR_SIGNATURE); constructorArgs = new Object[] { context, attrs, defStyleAttr, defStyleRes }; } catch (NoSuchMethodException e) { try { constructor = layoutManagerClass.getConstructor(); } catch (NoSuchMethodException e1) { e1.initCause(e); throw new IllegalStateException( attrs.getPositionDescription() + ": Error creating LayoutManager " + className, e1); } } constructor.setAccessible(true); setLayoutManager(constructor.newInstance(constructorArgs)); } catch (ClassNotFoundException e) { throw new IllegalStateException( attrs.getPositionDescription() + ": Unable to find LayoutManager " + className, e); } catch (InvocationTargetException e) { throw new IllegalStateException(attrs.getPositionDescription() + ": Could not instantiate the LayoutManager: " + className, e); } catch (InstantiationException e) { throw new IllegalStateException(attrs.getPositionDescription() + ": Could not instantiate the LayoutManager: " + className, e); } catch (IllegalAccessException e) { throw new IllegalStateException( attrs.getPositionDescription() + ": Cannot access non-public constructor " + className, e); } catch (ClassCastException e) { throw new IllegalStateException( attrs.getPositionDescription() + ": Class is not a LayoutManager " + className, e); } } } }
From source file:ca.oson.json.Oson.java
<T> T newInstance(Map<String, Object> map, Class<T> valueType) {
InstanceCreator creator = getTypeAdapter(valueType);
if (creator != null) {
return (T) creator.createInstance(valueType);
}//from w ww . j a va2 s. c om
T obj = null;
if (valueType != null) {
obj = (T) getDefaultValue(valueType);
if (obj != null) {
return obj;
}
}
if (map == null) {
return null;
}
// @JsonTypeInfo(use = JsonTypeInfo.Id.MINIMAL_CLASS, include = As.PROPERTY, property = "@class")
//@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = As.PROPERTY, property = "@class")
String JsonClassType = null;
if (valueType != null) {
if (getAnnotationSupport()) {
for (Annotation annotation : valueType.getAnnotations()) {
if (annotation instanceof JsonTypeInfo) {
JsonTypeInfo jsonTypeInfo = (JsonTypeInfo) annotation;
JsonTypeInfo.Id use = jsonTypeInfo.use();
JsonTypeInfo.As as = jsonTypeInfo.include();
if ((use == JsonTypeInfo.Id.MINIMAL_CLASS || use == JsonTypeInfo.Id.CLASS)
&& as == As.PROPERTY) {
JsonClassType = jsonTypeInfo.property();
}
}
}
}
}
if (JsonClassType == null) {
JsonClassType = getJsonClassType();
}
String className = null;
if (map.containsKey(JsonClassType)) {
className = map.get(JsonClassType).toString();
}
Class<T> classType = getClassType(className);
// && (valueType == null || valueType.isAssignableFrom(classType) || Map.class.isAssignableFrom(valueType))
if (classType != null) {
valueType = classType;
}
if (valueType == null) {
return (T) map; // or null, which is better?
}
Constructor<?>[] constructors = null;
Class implClass = null;
if (valueType.isInterface() || Modifier.isAbstract(valueType.getModifiers())) {
implClass = DeSerializerUtil.implementingClass(valueType.getName());
}
if (implClass != null) {
constructors = implClass.getDeclaredConstructors();
} else {
constructors = valueType.getDeclaredConstructors();//.getConstructors();
}
Object singleMapValue = null;
Class singleMapValueType = null;
if (map.size() == 1) {
singleMapValue = map.get(valueType.getName());
if (singleMapValue != null) {
singleMapValueType = singleMapValue.getClass();
if (singleMapValueType == String.class) {
singleMapValue = StringUtil.unquote(singleMapValue.toString(), isEscapeHtml());
}
try {
if (valueType == Locale.class) {
Constructor constructor = null;
String[] parts = ((String) singleMapValue).split("_");
if (parts.length == 1) {
constructor = valueType.getConstructor(String.class);
constructor.setAccessible(true);
obj = (T) constructor.newInstance(singleMapValue);
} else if (parts.length == 2) {
constructor = valueType.getConstructor(String.class, String.class);
constructor.setAccessible(true);
obj = (T) constructor.newInstance(parts);
} else if (parts.length == 3) {
constructor = valueType.getConstructor(String.class, String.class, String.class);
constructor.setAccessible(true);
obj = (T) constructor.newInstance(parts);
}
if (obj != null) {
return obj;
}
}
} catch (Exception e) {
}
Map<Class, Constructor> cmaps = new HashMap<>();
for (Constructor constructor : constructors) {
//Class[] parameterTypes = constructor.getParameterTypes();
int parameterCount = constructor.getParameterCount();
if (parameterCount == 1) {
Class[] types = constructor.getParameterTypes();
cmaps.put(types[0], constructor);
}
}
if (cmaps.size() > 0) {
Constructor constructor = null;
if ((cmaps.containsKey(Boolean.class) || cmaps.containsKey(boolean.class))
&& BooleanUtil.isBoolean(singleMapValue.toString())) {
constructor = cmaps.get(Boolean.class);
if (constructor == null) {
constructor = cmaps.get(boolean.class);
}
if (constructor != null) {
try {
constructor.setAccessible(true);
obj = (T) constructor
.newInstance(BooleanUtil.string2Boolean(singleMapValue.toString()));
if (obj != null) {
return obj;
}
} catch (Exception e) {
}
}
} else if (StringUtil.isNumeric(singleMapValue.toString())) {
Class[] classes = new Class[] { int.class, Integer.class, long.class, Long.class,
double.class, Double.class, Byte.class, byte.class, Short.class, short.class,
Float.class, float.class, BigDecimal.class, BigInteger.class, AtomicInteger.class,
AtomicLong.class, Number.class };
for (Class cls : classes) {
constructor = cmaps.get(cls);
if (constructor != null) {
try {
obj = (T) constructor.newInstance(NumberUtil.getNumber(singleMapValue, cls));
if (obj != null) {
return obj;
}
} catch (Exception e) {
}
}
}
} else if (StringUtil.isArrayOrList(singleMapValue.toString())
|| singleMapValue.getClass().isArray()
|| Collection.class.isAssignableFrom(singleMapValue.getClass())) {
for (Entry<Class, Constructor> entry : cmaps.entrySet()) {
Class cls = entry.getKey();
constructor = entry.getValue();
if (cls.isArray() || Collection.class.isAssignableFrom(cls)) {
Object listObject = null;
if (singleMapValue instanceof String) {
JSONArray objArray = new JSONArray(singleMapValue.toString());
listObject = (List) fromJsonMap(objArray);
} else {
listObject = singleMapValue;
}
FieldData objectDTO = new FieldData(listObject, cls, true);
listObject = json2Object(objectDTO);
if (listObject != null) {
try {
obj = (T) constructor.newInstance(listObject);
if (obj != null) {
return obj;
}
} catch (Exception e) {
}
}
}
}
}
for (Entry<Class, Constructor> entry : cmaps.entrySet()) {
Class cls = entry.getKey();
constructor = entry.getValue();
try {
obj = (T) constructor.newInstance(singleMapValue);
if (obj != null) {
return obj;
}
} catch (Exception e) {
}
}
}
}
}
if (implClass != null) {
valueType = implClass;
}
try {
obj = valueType.newInstance();
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (InstantiationException | IllegalAccessException e) {
//e.printStackTrace();
}
///*
for (Constructor constructor : constructors) {
//Class[] parameterTypes = constructor.getParameterTypes();
int parameterCount = constructor.getParameterCount();
if (parameterCount > 0) {
constructor.setAccessible(true);
Annotation[] annotations = constructor.getDeclaredAnnotations(); // getAnnotations();
for (Annotation annotation : annotations) {
boolean isJsonCreator = false;
if (annotation instanceof JsonCreator) {
isJsonCreator = true;
} else if (annotation instanceof ca.oson.json.annotation.FieldMapper) {
ca.oson.json.annotation.FieldMapper fieldMapper = (ca.oson.json.annotation.FieldMapper) annotation;
if (fieldMapper.jsonCreator() == BOOLEAN.TRUE) {
isJsonCreator = true;
}
}
if (isJsonCreator) {
Parameter[] parameters = constructor.getParameters();
String[] parameterNames = ObjectUtil.getParameterNames(parameters);
//parameterCount = parameters.length;
Object[] parameterValues = new Object[parameterCount];
int i = 0;
for (String parameterName : parameterNames) {
parameterValues[i] = getParameterValue(map, valueType, parameterName,
parameters[i].getType());
i++;
}
try {
obj = (T) constructor.newInstance(parameterValues);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException e) {
//e.printStackTrace();
}
}
}
} else {
try {
constructor.setAccessible(true);
obj = (T) constructor.newInstance();
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException e) {
//e.printStackTrace();
}
}
}
//*/
// try again
for (Constructor constructor : constructors) {
int parameterCount = constructor.getParameterCount();
if (parameterCount > 0) {
constructor.setAccessible(true);
try {
List<String> parameterNames = ObjectUtil.getParameterNames(constructor);
if (parameterNames != null && parameterNames.size() > 0) {
Class[] parameterTypes = constructor.getParameterTypes();
int length = parameterTypes.length;
if (length == parameterNames.size()) {
Object[] parameterValues = new Object[length];
Object parameterValue;
for (int i = 0; i < length; i++) {
parameterValues[i] = getParameterValue(map, valueType, parameterNames.get(i),
parameterTypes[i]);
}
try {
obj = (T) constructor.newInstance(parameterValues);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException e) {
//e.printStackTrace();
}
}
}
} catch (IOException e1) {
// e1.printStackTrace();
}
}
}
// try more
for (Constructor constructor : constructors) {
int parameterCount = constructor.getParameterCount();
if (parameterCount > 0) {
constructor.setAccessible(true);
Class[] parameterTypes = constructor.getParameterTypes();
List<String> parameterNames;
try {
parameterNames = ObjectUtil.getParameterNames(constructor);
if (parameterNames != null) {
int length = parameterTypes.length;
if (length > parameterNames.size()) {
length = parameterNames.size();
}
Object[] parameterValues = new Object[length];
for (int i = 0; i < length; i++) {
parameterValues[i] = getParameterValue(map, valueType, parameterNames.get(i),
parameterTypes[i]);
}
obj = (T) constructor.newInstance(parameterValues);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException | IOException e) {
//e.printStackTrace();
}
}
}
// try more
try {
Method[] methods = valueType.getMethods(); // .getMethod("getInstance", null);
List<Method> methodList = new ArrayList<>();
if (methods != null) {
for (Method method : methods) {
String methodName = method.getName();
if (methodName.equals("getInstance") || methodName.equals("newInstance")
|| methodName.equals("createInstance") || methodName.equals("factory")) {
Class returnType = method.getReturnType();
if (valueType.isAssignableFrom(returnType) && Modifier.isStatic(method.getModifiers())) {
int parameterCount = method.getParameterCount();
if (parameterCount == 0) {
try {
obj = ObjectUtil.getMethodValue(null, method);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue,
singleMapValueType);
}
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
} else {
methodList.add(method);
}
}
}
}
for (Method method : methodList) {
try {
int parameterCount = method.getParameterCount();
Object[] parameterValues = new Object[parameterCount];
Object parameterValue;
int i = 0;
Class[] parameterTypes = method.getParameterTypes();
String[] parameterNames = ObjectUtil.getParameterNames(method);
if (parameterCount == 1 && valueType != null && singleMapValue != null
&& singleMapValueType != null) {
if (ObjectUtil.isSameDataType(parameterTypes[0], singleMapValueType)) {
try {
obj = ObjectUtil.getMethodValue(null, method, singleMapValue);
if (obj != null) {
return obj;
}
} catch (IllegalArgumentException ex) {
//ex.printStackTrace();
}
}
} else if (parameterNames != null && parameterNames.length == parameterCount) {
for (String parameterName : ObjectUtil.getParameterNames(method)) {
parameterValues[i] = getParameterValue(map, valueType, parameterName,
parameterTypes[i]);
i++;
}
} else {
// try annotation
Parameter[] parameters = method.getParameters();
parameterNames = ObjectUtil.getParameterNames(parameters);
parameterCount = parameters.length;
parameterValues = new Object[parameterCount];
i = 0;
for (String parameterName : parameterNames) {
parameterValues[i] = getParameterValue(map, valueType, parameterName,
parameterTypes[i]);
i++;
}
}
obj = ObjectUtil.getMethodValue(null, method, parameterValues);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (IOException | IllegalArgumentException e) {
//e.printStackTrace();
}
}
}
} catch (SecurityException e) {
// e.printStackTrace();
}
// try all static methods, if the return type is correct, get it as the final object
Method[] methods = valueType.getDeclaredMethods();
for (Method method : methods) {
if (Modifier.isStatic(method.getModifiers())) {
Class returnType = method.getReturnType();
if (valueType.isAssignableFrom(returnType)) {
try {
Object[] parameterValues = null;
int parameterCount = method.getParameterCount();
if (parameterCount > 0) {
if (parameterCount == 1 && map.size() == 1 && singleMapValue != null
&& singleMapValueType != null) {
if (ObjectUtil.isSameDataType(method.getParameterTypes()[0], singleMapValueType)) {
obj = ObjectUtil.getMethodValue(null, method, singleMapValueType);
if (obj != null) {
return obj;
}
}
}
parameterValues = new Object[parameterCount];
Object parameterValue;
int i = 0;
Class[] parameterTypes = method.getParameterTypes();
String[] parameterNames = ObjectUtil.getParameterNames(method);
if (parameterNames != null && parameterNames.length == parameterCount) {
for (String parameterName : ObjectUtil.getParameterNames(method)) {
parameterValues[i] = getParameterValue(map, valueType, parameterName,
parameterTypes[i]);
i++;
}
} else {
// try annotation
Parameter[] parameters = method.getParameters();
parameterNames = ObjectUtil.getParameterNames(parameters);
parameterCount = parameters.length;
parameterValues = new Object[parameterCount];
i = 0;
for (String parameterName : parameterNames) {
parameterValues[i] = getParameterValue(map, valueType, parameterName,
parameterTypes[i]);
i++;
}
}
}
obj = ObjectUtil.getMethodValue(obj, method, parameterValues);
if (obj != null) {
return setSingleMapValue(obj, valueType, singleMapValue, singleMapValueType);
}
} catch (IOException | IllegalArgumentException e) {
//e.printStackTrace();
}
}
}
}
return null;
}