public static <T> Constructor<T> findConstructor(Class<T> cls, boolean canFixAccess) throws IllegalArgumentException { try { Constructor<T> ctor = cls.getDeclaredConstructor(); if (canFixAccess) { checkAndFixAccess(ctor); } else { // Has to be public... if (!Modifier.isPublic(ctor.getModifiers())) { throw new IllegalArgumentException( "Default constructor for " + cls.getName() + " is not accessible (non-public?): not allowed to try modify access via Reflection: can not instantiate type"); } } return ctor; } catch (NoSuchMethodException e) {; } catch (Exception e) { ClassUtil.unwrapAndThrowAsIAE( e, "Failed to find default constructor of class " + cls.getName() + ", problem: " + e.getMessage()); } return null; }
/** * @param cacheName Cache name. * @param key Key. * @return Data key. * @throws Exception In case of error. */ private Object key(String cacheName, int key) throws Exception { Class<?> cls = Class.forName(GridSpringDynamicCacheManager.class.getName() + "$DataKey"); Constructor<?> cons = cls.getDeclaredConstructor(String.class, Object.class); cons.setAccessible(true); return cons.newInstance(cacheName, key); }
public void process(File cFile) { try { String cName = ClassNameFinder.thisClass(BinaryFile.read(cFile)); if (!cName.contains("")) return; // Ignore unpackaged classes testClass = Class.forName(cName); } catch (Exception e) { throw new RuntimeException(e); } TestMethods testMethods = new TestMethods(); Method creator = null; Method cleanup = null; for (Method m : testClass.getDeclaredMethods()) { testMethods.addIfTestMethod(m); if (creator == null) creator = checkForCreatorMethod(m); if (cleanup == null) cleanup = checkForCleanupMethod(m); } if (testMethods.size() > 0) { if (creator == null) try { if (!Modifier.isPublic(testClass.getDeclaredConstructor().getModifiers())) { Print.print("Error: " + testClass + " default constructor must be public"); System.exit(1); } } catch (NoSuchMethodException e) { // Synthesized default constructor; OK } Print.print(testClass.getName()); } for (Method m : testMethods) { Print.printnb(" . " + m.getName() + " "); try { Object testObject = createTestObject(creator); boolean success = false; try { if (m.getReturnType().equals(boolean.class)) success = (Boolean) m.invoke(testObject); else { m.invoke(testObject); success = true; // If no assert fails } } catch (InvocationTargetException e) { // Actual exception is inside e: Print.print(e.getCause()); } Print.print(success ? "" : "(failed)"); testsRun++; if (!success) { failures++; failedTests.add(testClass.getName() + ": " + m.getName()); } if (cleanup != null) cleanup.invoke(testObject, testObject); } catch (Exception e) { throw new RuntimeException(e); } } }
/** * Create a channel with the given capacity and semaphore implementations instantiated from the * supplied class * * @exception IllegalArgumentException if capacity less or equal to zero. * @exception NoSuchMethodException If class does not have constructor that intializes permits * @exception SecurityException if constructor information not accessible * @exception InstantiationException if semaphore class is abstract * @exception IllegalAccessException if constructor cannot be called * @exception InvocationTargetException if semaphore constructor throws an exception */ public SemaphoreControlledChannel(int capacity, Class semaphoreClass) throws IllegalArgumentException, NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException, InvocationTargetException { if (capacity <= 0) throw new IllegalArgumentException(); capacity_ = capacity; Class[] longarg = {Long.TYPE}; Constructor ctor = semaphoreClass.getDeclaredConstructor(longarg); Object[] cap = {Long.valueOf(capacity)}; putGuard_ = (Semaphore) (ctor.newInstance(/*(Object[]) GemStoneAddition*/ cap)); Object[] zero = {Long.valueOf(0)}; takeGuard_ = (Semaphore) (ctor.newInstance(/*(Object[]) GemStoneAddition*/ zero)); }
@Override public T create() { Class<T> concreteClass = type.getConcreteClass(); try { Constructor<T> declaredConstructor = concreteClass.getDeclaredConstructor(); declaredConstructor.setAccessible(true); return declaredConstructor.newInstance(); } catch (InvocationTargetException e) { throw UncheckedException.throwAsUncheckedException(e.getTargetException()); } catch (Exception e) { throw UncheckedException.throwAsUncheckedException(e); } }
@SuppressWarnings("unchecked") private static <T> Constructor<T> getConstructor(Class<T> type) { try { return type.getDeclaredConstructor(); } catch (NoSuchMethodException e) { // Ignore } Constructor[] constructors = type.getConstructors(); if (constructors.length != 1) { throw new IllegalStateException("Class " + type + " should have a single public constructor"); } return constructors[0]; }
/** * 指定されたクラスのインスタンスを生成する * * @param Class<?> cls インスタンスを生成したいクラス * @param Object... args インスタンス生成に用いるパラメータ */ public static Object getInstance(Class<?> cls, Object... args) throws IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException, ClassNotFoundException, SecurityException, NoSuchMethodException { message = "以下のクラスのインスタンスを生成:" + cls.getName() + "\r\n"; display.append(message); if (args == null) { return cls.newInstance(); } else { Class<?>[] argsArray = new Class<?>[args.length]; Constructor<?> con = null; for (int i = 0; i < args.length; i++) { System.out.println(args[i]); argsArray[i] = getClassObject(args[i]); } con = cls.getDeclaredConstructor(argsArray); return con.newInstance(args); } }
private static final Record getTypedObject(int type) { if (type < 0 || type > knownRecords.length) return unknownRecord.getObject(); if (knownRecords[type] != null) return knownRecords[type]; /* Construct the class name by putting the type before "Record". */ String s = Record.class.getPackage().getName() + "." + Type.string(type).replace('-', '_') + "Record"; try { Class c = Class.forName(s); Constructor m = c.getDeclaredConstructor(emptyClassArray); knownRecords[type] = (Record) m.newInstance(emptyObjectArray); } catch (ClassNotFoundException e) { /* This is normal; do nothing */ } catch (Exception e) { if (Options.check("verbose")) System.err.println(e); } if (knownRecords[type] == null) knownRecords[type] = unknownRecord.getObject(); return knownRecords[type]; }
/** * Checks if a class fulfills the JavaBeans contract. * * @param cls the class to check */ public static void checkJavaBean(Class<?> cls) { try { Constructor<?> constructor = cls.getDeclaredConstructor(); int classModifiers = cls.getModifiers(); if (Modifier.isInterface(classModifiers)) throw new RuntimeException(cls.getName() + " is an interface"); if (Modifier.isAbstract(classModifiers)) throw new RuntimeException( cls.getName() + " cannot be instantiated - it is an abstract class"); int modifiers = constructor.getModifiers(); if (!Modifier.isPublic(modifiers)) throw new RuntimeException("No public default constructor in " + cls); } catch (NoSuchMethodException e) { throw new RuntimeException("No default constructor in class " + cls); } catch (SecurityException e) { logger.error( "I am not allowed to check the class by using reflection, " + "so I just can hope the class is alright and go on: ", e); } }
public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int num = Integer.parseInt(br.readLine().trim()); Object o; // Solution starts here if (num < 1 || num > Math.pow(2, 30)) throw new Exception(); Solution ob = new Solution(); Class<?> c = Class.forName("Solution$Private"); Constructor<?> constructor = c.getDeclaredConstructor(Solution.class); constructor.setAccessible(true); o = constructor.newInstance(ob); Method m = c.getDeclaredMethod("powerof2", new Class[] {int.class}); m.setAccessible(true); String ans = (String) m.invoke(o, num); System.out.println(num + " is " + ans); // ends here System.out.println( "An instance of class: " + o.getClass().getSimpleName() + " has been created"); } // end of main
protected <T extends FluentPage> T initClass(Class<T> cls) { T page = null; try { Constructor construct = cls.getDeclaredConstructor(); construct.setAccessible(true); page = (T) construct.newInstance(); Class parent = Class.forName(Fluent.class.getName()); Method m = parent.getDeclaredMethod("setDriver", WebDriver.class); m.setAccessible(true); m.invoke(page, getDriver()); // init fields with default proxies Field[] fields = cls.getDeclaredFields(); for (Field fieldFromPage : fields) { if (!FluentWebElement.class.isAssignableFrom(fieldFromPage.getType())) { continue; } fieldFromPage.setAccessible(true); proxyElement(new DefaultElementLocatorFactory(getDriver()), page, fieldFromPage); } } catch (ClassNotFoundException e) { throw new ConstructionException( "Class " + (cls != null ? cls.getName() : " null") + "not found", e); } catch (IllegalAccessException e) { throw new ConstructionException( "IllegalAccessException on class " + (cls != null ? cls.getName() : " null"), e); } catch (NoSuchMethodException e) { throw new ConstructionException( "No constructor found on class " + (cls != null ? cls.getName() : " null"), e); } catch (InstantiationException e) { throw new ConstructionException( "Unable to instantiate " + (cls != null ? cls.getName() : " null"), e); } catch (InvocationTargetException e) { throw new ConstructionException( "Cannot invoke method setDriver on " + (cls != null ? cls.getName() : " null"), e); } return page; }
@SuppressWarnings("unchecked") LDAPObjectHandler(final Class<T> type) throws LDAPPersistException { this.type = type; final Class<? super T> superclassType = type.getSuperclass(); if (superclassType == null) { superclassHandler = null; } else { final LDAPObject superclassAnnotation = superclassType.getAnnotation(LDAPObject.class); if (superclassAnnotation == null) { superclassHandler = null; } else { superclassHandler = new LDAPObjectHandler(superclassType); } } final TreeMap<String, FieldInfo> fields = new TreeMap<String, FieldInfo>(); final TreeMap<String, GetterInfo> getters = new TreeMap<String, GetterInfo>(); final TreeMap<String, SetterInfo> setters = new TreeMap<String, SetterInfo>(); ldapObject = type.getAnnotation(LDAPObject.class); if (ldapObject == null) { throw new LDAPPersistException(ERR_OBJECT_HANDLER_OBJECT_NOT_ANNOTATED.get(type.getName())); } final LinkedHashMap<String, String> objectClasses = new LinkedHashMap<String, String>(10); final String oc = ldapObject.structuralClass(); if (oc.length() == 0) { structuralClass = getUnqualifiedClassName(type); } else { structuralClass = oc; } final StringBuilder invalidReason = new StringBuilder(); if (PersistUtils.isValidLDAPName(structuralClass, invalidReason)) { objectClasses.put(toLowerCase(structuralClass), structuralClass); } else { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_STRUCTURAL_CLASS.get( type.getName(), structuralClass, invalidReason.toString())); } auxiliaryClasses = ldapObject.auxiliaryClass(); for (final String auxiliaryClass : auxiliaryClasses) { if (PersistUtils.isValidLDAPName(auxiliaryClass, invalidReason)) { objectClasses.put(toLowerCase(auxiliaryClass), auxiliaryClass); } else { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_AUXILIARY_CLASS.get( type.getName(), auxiliaryClass, invalidReason.toString())); } } superiorClasses = ldapObject.superiorClass(); for (final String superiorClass : superiorClasses) { if (PersistUtils.isValidLDAPName(superiorClass, invalidReason)) { objectClasses.put(toLowerCase(superiorClass), superiorClass); } else { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_SUPERIOR_CLASS.get( type.getName(), superiorClass, invalidReason.toString())); } } if (superclassHandler != null) { for (final String s : superclassHandler.objectClassAttribute.getValues()) { objectClasses.put(toLowerCase(s), s); } } objectClassAttribute = new Attribute("objectClass", objectClasses.values()); final String parentDNStr = ldapObject.defaultParentDN(); try { defaultParentDN = new DN(parentDNStr); } catch (LDAPException le) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_DEFAULT_PARENT.get( type.getName(), parentDNStr, le.getMessage()), le); } final String postDecodeMethodName = ldapObject.postDecodeMethod(); if (postDecodeMethodName.length() > 0) { try { postDecodeMethod = type.getDeclaredMethod(postDecodeMethodName); postDecodeMethod.setAccessible(true); } catch (Exception e) { debugException(e); throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_POST_DECODE_METHOD.get( type.getName(), postDecodeMethodName, getExceptionMessage(e)), e); } } else { postDecodeMethod = null; } final String postEncodeMethodName = ldapObject.postEncodeMethod(); if (postEncodeMethodName.length() > 0) { try { postEncodeMethod = type.getDeclaredMethod(postEncodeMethodName, Entry.class); postEncodeMethod.setAccessible(true); } catch (Exception e) { debugException(e); throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_POST_ENCODE_METHOD.get( type.getName(), postEncodeMethodName, getExceptionMessage(e)), e); } } else { postEncodeMethod = null; } try { constructor = type.getDeclaredConstructor(); constructor.setAccessible(true); } catch (Exception e) { debugException(e); throw new LDAPPersistException( ERR_OBJECT_HANDLER_NO_DEFAULT_CONSTRUCTOR.get(type.getName()), e); } Field tmpDNField = null; Field tmpEntryField = null; final LinkedList<FieldInfo> tmpRFilterFields = new LinkedList<FieldInfo>(); final LinkedList<FieldInfo> tmpAAFilterFields = new LinkedList<FieldInfo>(); final LinkedList<FieldInfo> tmpCAFilterFields = new LinkedList<FieldInfo>(); final LinkedList<FieldInfo> tmpRDNFields = new LinkedList<FieldInfo>(); for (final Field f : type.getDeclaredFields()) { final LDAPField fieldAnnotation = f.getAnnotation(LDAPField.class); final LDAPDNField dnFieldAnnotation = f.getAnnotation(LDAPDNField.class); final LDAPEntryField entryFieldAnnotation = f.getAnnotation(LDAPEntryField.class); if (fieldAnnotation != null) { f.setAccessible(true); final FieldInfo fieldInfo = new FieldInfo(f, type); final String attrName = toLowerCase(fieldInfo.getAttributeName()); if (fields.containsKey(attrName)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_ATTR_CONFLICT.get(type.getName(), fieldInfo.getAttributeName())); } else { fields.put(attrName, fieldInfo); } switch (fieldInfo.getFilterUsage()) { case REQUIRED: tmpRFilterFields.add(fieldInfo); break; case ALWAYS_ALLOWED: tmpAAFilterFields.add(fieldInfo); break; case CONDITIONALLY_ALLOWED: tmpCAFilterFields.add(fieldInfo); break; case EXCLUDED: default: break; } if (fieldInfo.includeInRDN()) { tmpRDNFields.add(fieldInfo); } } if (dnFieldAnnotation != null) { f.setAccessible(true); if (fieldAnnotation != null) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_CONFLICTING_FIELD_ANNOTATIONS.get( type.getName(), "LDAPField", "LDAPDNField", f.getName())); } if (tmpDNField != null) { throw new LDAPPersistException(ERR_OBJECT_HANDLER_MULTIPLE_DN_FIELDS.get(type.getName())); } final int modifiers = f.getModifiers(); if (Modifier.isFinal(modifiers)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_DN_FIELD_FINAL.get(f.getName(), type.getName())); } else if (Modifier.isStatic(modifiers)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_DN_FIELD_STATIC.get(f.getName(), type.getName())); } final Class<?> fieldType = f.getType(); if (fieldType.equals(String.class)) { tmpDNField = f; } else { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_DN_FIELD_TYPE.get( type.getName(), f.getName(), fieldType.getName())); } } if (entryFieldAnnotation != null) { f.setAccessible(true); if (fieldAnnotation != null) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_CONFLICTING_FIELD_ANNOTATIONS.get( type.getName(), "LDAPField", "LDAPEntryField", f.getName())); } if (tmpEntryField != null) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_MULTIPLE_ENTRY_FIELDS.get(type.getName())); } final int modifiers = f.getModifiers(); if (Modifier.isFinal(modifiers)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_ENTRY_FIELD_FINAL.get(f.getName(), type.getName())); } else if (Modifier.isStatic(modifiers)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_ENTRY_FIELD_STATIC.get(f.getName(), type.getName())); } final Class<?> fieldType = f.getType(); if (fieldType.equals(ReadOnlyEntry.class)) { tmpEntryField = f; } else { throw new LDAPPersistException( ERR_OBJECT_HANDLER_INVALID_ENTRY_FIELD_TYPE.get( type.getName(), f.getName(), fieldType.getName())); } } } dnField = tmpDNField; entryField = tmpEntryField; requiredFilterFields = Collections.unmodifiableList(tmpRFilterFields); alwaysAllowedFilterFields = Collections.unmodifiableList(tmpAAFilterFields); conditionallyAllowedFilterFields = Collections.unmodifiableList(tmpCAFilterFields); rdnFields = Collections.unmodifiableList(tmpRDNFields); final LinkedList<GetterInfo> tmpRFilterGetters = new LinkedList<GetterInfo>(); final LinkedList<GetterInfo> tmpAAFilterGetters = new LinkedList<GetterInfo>(); final LinkedList<GetterInfo> tmpCAFilterGetters = new LinkedList<GetterInfo>(); final LinkedList<GetterInfo> tmpRDNGetters = new LinkedList<GetterInfo>(); for (final Method m : type.getDeclaredMethods()) { final LDAPGetter getter = m.getAnnotation(LDAPGetter.class); final LDAPSetter setter = m.getAnnotation(LDAPSetter.class); if (getter != null) { m.setAccessible(true); if (setter != null) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_CONFLICTING_METHOD_ANNOTATIONS.get( type.getName(), "LDAPGetter", "LDAPSetter", m.getName())); } final GetterInfo methodInfo = new GetterInfo(m, type); final String attrName = toLowerCase(methodInfo.getAttributeName()); if (fields.containsKey(attrName) || getters.containsKey(attrName)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_ATTR_CONFLICT.get(type.getName(), methodInfo.getAttributeName())); } else { getters.put(attrName, methodInfo); } switch (methodInfo.getFilterUsage()) { case REQUIRED: tmpRFilterGetters.add(methodInfo); break; case ALWAYS_ALLOWED: tmpAAFilterGetters.add(methodInfo); break; case CONDITIONALLY_ALLOWED: tmpCAFilterGetters.add(methodInfo); break; case EXCLUDED: default: // No action required. break; } if (methodInfo.includeInRDN()) { tmpRDNGetters.add(methodInfo); } } if (setter != null) { m.setAccessible(true); final SetterInfo methodInfo = new SetterInfo(m, type); final String attrName = toLowerCase(methodInfo.getAttributeName()); if (fields.containsKey(attrName) || setters.containsKey(attrName)) { throw new LDAPPersistException( ERR_OBJECT_HANDLER_ATTR_CONFLICT.get(type.getName(), methodInfo.getAttributeName())); } else { setters.put(attrName, methodInfo); } } } requiredFilterGetters = Collections.unmodifiableList(tmpRFilterGetters); alwaysAllowedFilterGetters = Collections.unmodifiableList(tmpAAFilterGetters); conditionallyAllowedFilterGetters = Collections.unmodifiableList(tmpCAFilterGetters); rdnGetters = Collections.unmodifiableList(tmpRDNGetters); if (rdnFields.isEmpty() && rdnGetters.isEmpty()) { throw new LDAPPersistException(ERR_OBJECT_HANDLER_NO_RDN_DEFINED.get(type.getName())); } fieldMap = Collections.unmodifiableMap(fields); getterMap = Collections.unmodifiableMap(getters); setterMap = Collections.unmodifiableMap(setters); final TreeSet<String> attrSet = new TreeSet<String>(); final TreeSet<String> lazySet = new TreeSet<String>(); if (ldapObject.requestAllAttributes()) { attrSet.add("*"); attrSet.add("+"); } else { for (final FieldInfo i : fields.values()) { if (i.lazilyLoad()) { lazySet.add(i.getAttributeName()); } else { attrSet.add(i.getAttributeName()); } } for (final SetterInfo i : setters.values()) { attrSet.add(i.getAttributeName()); } } attributesToRequest = new String[attrSet.size()]; attrSet.toArray(attributesToRequest); lazilyLoadedAttributes = new String[lazySet.size()]; lazySet.toArray(lazilyLoadedAttributes); }