/**
* Returns the correct implementation instance for the interface <code>type</code>. For convention
* the implentation is named <code>InterfaceName + Impl</code>.
*
* @param type The interface type
* @return The correct ModelProxy subclass (if exists), a ModelProxy instance otherwise
* @throws MalformedModelException is the interface or the implementation are not well formed
* (they don't respect the conventions).
* @throws ModelRuntimeException is any error occurs during the instantiation
*/
protected ModelProxy createInstance(Class type) {
Class backClass;
if (implementations.containsKey(type)) backClass = implementations.get(type);
else {
/* type never seen */
try {
Package pkg = type.getPackage();
String pkgN = pkg == null ? "" : pkg.getName();
backClass = Class.forName(pkgN + tableName(type) + CommonStatic.getImplementationSuffix());
} catch (Exception e) {
backClass = ModelProxy.class;
}
Validator.validateModel(type, backClass);
initFieldsTypes(type);
implementations.put(type, backClass);
}
ModelProxy impl = null;
try {
impl = (ModelProxy) backClass.newInstance();
} catch (Exception e) {
throw new ModelRuntimeException(e.getMessage());
}
return impl;
}
//
// Find all the java.sql interfaces implemented by a class and find
// the methods in those interfaces which raise
// SQLFeatureNotSupportedException when called on the passed-in candidate object.
//
private void vetInterfaces(
Object candidate,
Class myClass,
HashSet<String> unsupportedList,
HashSet<String> notUnderstoodList)
throws Exception {
Class superClass = myClass.getSuperclass();
if (superClass != null) {
vetInterfaces(candidate, superClass, unsupportedList, notUnderstoodList);
}
//
// The contract for Class.getInterfaces() states that the interfaces
// come back in a deterministic order, namely, in the order that
// they were declared in the "extends" clause.
//
Class<?>[] interfaces = myClass.getInterfaces();
int interfaceCount = interfaces.length;
for (int i = 0; i < interfaceCount; i++) {
Class<?> iface = interfaces[i];
if (iface.getPackage().getName().equals(SQL_PACKAGE_NAME)) {
vetInterfaceMethods(candidate, iface, unsupportedList, notUnderstoodList);
}
vetInterfaces(candidate, iface, unsupportedList, notUnderstoodList);
}
}
public void apply()
throws IllegalAccessException, InvocationTargetException, InstantiationException {
if (type.isEnum()) {
for (T instance : type.getEnumConstants()) {
assertThat(
instance.toString(),
is(
type.getCanonicalName().substring(type.getPackage().getName().length() + 1)
+ "."
+ ((Enum<?>) instance).name()));
}
return;
}
for (Constructor<?> constructor : type.getDeclaredConstructors()) {
if (constructor.isSynthetic() && skipSynthetic) {
continue;
}
constructor.setAccessible(true);
Class<?>[] parameterTypes = constructor.getParameterTypes();
Object[] actualArguments = new Object[parameterTypes.length];
Object[] otherArguments = new Object[parameterTypes.length];
int index = 0;
for (Class<?> parameterType : parameterTypes) {
putInstance(parameterType, actualArguments, otherArguments, index++);
}
int testIndex = 0;
@SuppressWarnings("unchecked")
T instance = (T) constructor.newInstance(actualArguments);
assertThat(instance, is(instance));
assertThat(instance, not(is((Object) null)));
assertThat(instance, not(is(new Object())));
Object similarInstance = constructor.newInstance(actualArguments);
assertThat(instance.hashCode(), is(similarInstance.hashCode()));
assertThat(instance, is(similarInstance));
if (skipToString) {
assertThat(instance.toString(), notNullValue());
} else if (optionalToStringRegex == null) {
checkString(instance);
} else {
assertThat(instance.toString(), new RegexMatcher(optionalToStringRegex));
}
for (Object otherArgument : otherArguments) {
Object[] compareArguments = new Object[actualArguments.length];
int argumentIndex = 0;
for (Object actualArgument : actualArguments) {
if (argumentIndex == testIndex) {
compareArguments[argumentIndex] = otherArgument;
} else {
compareArguments[argumentIndex] = actualArgument;
}
argumentIndex++;
}
Object unlikeInstance = constructor.newInstance(compareArguments);
assertThat(instance.hashCode(), not(is(unlikeInstance)));
assertThat(instance, not(is(unlikeInstance)));
testIndex++;
}
}
}
public static void main(String[] args) throws Exception {
Class<ClassTest> clazz = ClassTest.class;
System.out.println("=============================================");
Constructor[] ctors = clazz.getDeclaredConstructors();
System.out.println("classTest的全部构造器如下：");
for (Constructor c : ctors) {
System.out.println(c);
}
System.out.println("=============================================");
Constructor[] publicCtors = clazz.getConstructors();
System.out.println("ClassTest的全部public构造器如下：");
for (Constructor c : publicCtors) {
System.out.println(c);
}
System.out.println("=============================================");
Method[] mtds = clazz.getMethods();
System.out.println("ClassTest的全部public方法如下：");
for (Method md : mtds) {
System.out.println(md);
}
System.out.println("=============================================");
System.out.println("ClassTest带一个字符串参数的info方法为：" + clazz.getMethod("info", String.class));
Annotation[] ans = clazz.getAnnotations();
System.out.println("ClassTest的全部annotation为：");
for (Annotation an : ans) {
System.out.println(an);
}
System.out.println("该元素上的@SuppressWarnings注释为：" + clazz.getAnnotation(SuppressWarnings.class));
System.out.println("=============================================");
Class<?>[] inners = clazz.getDeclaredClasses();
System.out.println("ClassTest的全部内部类如下：");
for (Class c : inners) {
System.out.println(c);
}
System.out.println("=============================================");
Class inClazz = Class.forName("ClassTest$Inner");
System.out.println("inClazz对应的外部类为：" + inClazz.getDeclaringClass());
System.out.println("ClassTest的包为：" + clazz.getPackage());
System.out.println("ClassTest的父类：" + clazz.getSuperclass());
}
protected void loadClassDependencies(Class aClass) throws ClassNotFoundException {
String name = aClass.getName();
if (myVisited.add(aClass)) {
try {
for (Method method : aClass.getDeclaredMethods()) {
loadTypeDependencies(method.getGenericReturnType());
for (Type type : method.getGenericExceptionTypes()) {
loadTypeDependencies(type);
}
for (Type type : method.getGenericParameterTypes()) {
loadTypeDependencies(type);
}
}
for (Constructor method : aClass.getDeclaredConstructors()) {
for (Type type : method.getGenericExceptionTypes()) {
loadTypeDependencies(type);
}
for (Type type : method.getGenericParameterTypes()) {
loadTypeDependencies(type);
}
}
for (Field field : aClass.getDeclaredFields()) {
loadTypeDependencies(field.getGenericType());
}
Type superclass = aClass.getGenericSuperclass();
if (superclass != null) {
loadClassDependencies(aClass);
}
for (Type intf : aClass.getGenericInterfaces()) {
loadTypeDependencies(intf);
}
aClass.getAnnotations();
Package aPackage = aClass.getPackage();
if (aPackage != null) {
aPackage.getAnnotations();
}
} catch (LinkageError e) {
throw new ClassNotFoundException(name);
} catch (TypeNotPresentException e) {
throw new ClassNotFoundException(name);
}
}
}
private void checkString(T instance) {
assertThat(
instance.toString(),
CoreMatchers.startsWith(
type.getCanonicalName().substring(type.getPackage().getName().length() + 1) + "{"));
assertThat(instance.toString(), endsWith("}"));
Class<?> currentType = type;
do {
for (Field field : type.getDeclaredFields()) {
if (!field.isSynthetic()
&& !Modifier.isStatic(field.getModifiers())
&& !ignoredFields.contains(field.getName())) {
assertThat(instance.toString(), containsString(field.getName()));
}
}
} while ((currentType = currentType.getSuperclass()) != Object.class);
}
public String getPublicMethodsForClasses(String classNames[]) {
StringBuilder result = new StringBuilder();
String className = null;
result.append("<classDefinitions>");
if (classNames != null && classNames.length > 0) {
for (int i = 0; i < classNames.length; i++) {
className = classNames[i];
if (className != null) {
result.append("<classDefinition>");
try {
Class c = Class.forName(className);
result.append(
(new StringBuilder("<classSimpleName>"))
.append(c.getSimpleName())
.append("</classSimpleName>")
.toString());
result.append(
(new StringBuilder("<classFullName>"))
.append(c.getName())
.append("</classFullName>")
.toString());
Package pack = c.getPackage();
String packStr = "";
if (pack != null) packStr = pack.getName();
result.append(
(new StringBuilder("<packageName>"))
.append(packStr)
.append("</packageName>")
.toString());
Method methods[] = c.getMethods();
Method method = null;
result.append("<methods>");
if (methods != null) {
for (int j = 0; j < methods.length; j++) {
method = methods[j];
if (method != null && !methodsExclude.contains(method.getName())) {
result.append("<method>");
result.append(
(new StringBuilder("<methodSignature>"))
.append(method.toString())
.append("</methodSignature>")
.toString());
result.append(
(new StringBuilder("<methodName>"))
.append(method.getName())
.append("</methodName>")
.toString());
result.append(
(new StringBuilder("<returnType>"))
.append(method.getReturnType().getName())
.append("</returnType>")
.toString());
Class paramClasses[] = method.getParameterTypes();
result.append("<params>");
if (paramClasses != null) {
for (int l = 0; l < paramClasses.length; l++)
if (paramClasses[l] != null)
result.append(
(new StringBuilder("<param>"))
.append(paramClasses[l].getName())
.append("</param>")
.toString());
}
result.append("</params>");
result.append("</method>");
}
}
}
result.append("</methods>");
} catch (ClassNotFoundException e) {
result.append(
(new StringBuilder("<classFullName>"))
.append(className)
.append("</classFullName>")
.toString());
result.append(
(new StringBuilder("<error>Problem retrieving "))
.append(className)
.append(" information</error>")
.toString());
System.out.println(e.getMessage());
}
result.append("</classDefinition>");
}
}
}
result.append("</classDefinitions>");
return result.toString();
}
public String getPublicPropertiesForClasses(String classNames[]) {
StringBuilder result = new StringBuilder();
String className = null;
ArrayList publicFields = new ArrayList();
result.append("<classDefinitions>");
if (classNames != null && classNames.length > 0) {
for (int i = 0; i < classNames.length; i++) {
className = classNames[i];
if (className != null) {
result.append("<classDefinition>");
try {
Class c = Class.forName(className);
Field fields[] = c.getFields();
Field field = null;
if (fields != null) {
for (int k = 0; k < fields.length; k++) {
field = fields[k];
if (field != null)
publicFields.add(
(new StringBuilder(String.valueOf(field.getName())))
.append(",")
.append(field.getType().getName())
.toString());
}
}
try {
BeanInfo b = Introspector.getBeanInfo(c);
result.append(
(new StringBuilder("<classSimpleName>"))
.append(c.getSimpleName())
.append("</classSimpleName>")
.toString());
result.append(
(new StringBuilder("<classFullName>"))
.append(c.getName())
.append("</classFullName>")
.toString());
Package pack = c.getPackage();
String packStr = "";
if (pack != null) packStr = pack.getName();
result.append(
(new StringBuilder("<packageName>"))
.append(packStr)
.append("</packageName>")
.toString());
PropertyDescriptor pds[] = b.getPropertyDescriptors();
if (pds != null) {
for (int propCount = 0; propCount < pds.length; propCount++) {
PropertyDescriptor pd = pds[propCount];
String propertyName = pd.getName();
Method readMethod = pd.getReadMethod();
Method writeMethod = pd.getWriteMethod();
if (readMethod != null
&& isPublicAccessor(readMethod.getModifiers())
&& writeMethod != null
&& isPublicAccessor(writeMethod.getModifiers()))
publicFields.add(
(new StringBuilder(String.valueOf(propertyName)))
.append(",")
.append(pd.getPropertyType().getName())
.toString());
}
}
} catch (Exception e) {
e.printStackTrace();
}
if (publicFields != null && publicFields.size() > 0) {
String temp = null;
result.append("<publicFields>");
for (int counter = 0; counter < publicFields.size(); counter++) {
temp = (String) publicFields.get(counter);
if (temp != null) {
String pubTemp[] = temp.split(",");
if (pubTemp.length == 2) {
result.append("<publicField>");
result.append(
(new StringBuilder("<publicFieldName>"))
.append(pubTemp[0])
.append("</publicFieldName>")
.toString());
result.append(
(new StringBuilder("<publicFieldType>"))
.append(pubTemp[1])
.append("</publicFieldType>")
.toString());
result.append("</publicField>");
}
}
}
result.append("</publicFields>");
}
} catch (ClassNotFoundException e) {
result.append(
(new StringBuilder("<classFullName>"))
.append(className)
.append("</classFullName>")
.toString());
result.append(
(new StringBuilder("<error>Problem retrieving "))
.append(className)
.append(" information</error>")
.toString());
System.out.println(e.getMessage());
}
result.append("</classDefinition>");
}
}
}
result.append("</classDefinitions>");
return result.toString();
}
public static void main(String[] args) {
// Obtain the class object if we know the name of the class
Class rental = RentCar.class;
try {
// get the absolute name of the class
String rentalClassPackage = rental.getName();
System.out.println("Class Name is: " + rentalClassPackage);
// get the simple name of the class (without package info)
String rentalClassNoPackage = rental.getSimpleName();
System.out.println("Class Name without package is: " + rentalClassNoPackage);
// get the package name of the class
Package rentalPackage = rental.getPackage();
System.out.println("Package Name is: " + rentalPackage);
// get all the constructors of the class
Constructor[] constructors = rental.getConstructors();
System.out.println("Constructors are: " + Arrays.toString(constructors));
// get constructor with specific argument
Constructor constructor = rental.getConstructor(Integer.TYPE);
// initializing an object of the RentCar class
RentCar rent = (RentCar) constructor.newInstance(455);
// get all methods of the class including declared methods of
// superclasses
// in that case, superclass of RentCar is the class java.lang.Object
Method[] allmethods = rental.getMethods();
System.out.println("Methods are: " + Arrays.toString(allmethods));
for (Method method : allmethods) {
System.out.println("method = " + method.getName());
}
// get all methods declared in the class
// but excludes inherited methods.
Method[] declaredMethods = rental.getDeclaredMethods();
System.out.println("Declared Methods are: " + Arrays.toString(declaredMethods));
for (Method dmethod : declaredMethods) {
System.out.println("method = " + dmethod.getName());
}
// get method with specific name and parameters
Method oneMethod = rental.getMethod("computeRentalCost", new Class[] {Integer.TYPE});
System.out.println("Method is: " + oneMethod);
// call computeRentalCost method with parameter int
oneMethod.invoke(rent, 4);
// get all the parameters of computeRentalCost
Class[] parameterTypes = oneMethod.getParameterTypes();
System.out.println(
"Parameter types of computeRentalCost() are: " + Arrays.toString(parameterTypes));
// get the return type of computeRentalCost
Class returnType = oneMethod.getReturnType();
System.out.println("Return type is: " + returnType);
// gets all the public member fields of the class RentCar
Field[] fields = rental.getFields();
System.out.println("Public Fields are: ");
for (Field oneField : fields) {
// get public field name
Field field = rental.getField(oneField.getName());
String fieldname = field.getName();
System.out.println("Fieldname is: " + fieldname);
// get public field type
Object fieldType = field.getType();
System.out.println("Type of field " + fieldname + " is: " + fieldType);
// get public field value
Object value = field.get(rent);
System.out.println("Value of field " + fieldname + " is: " + value);
}
// How to access private member fields of the class
// getDeclaredField() returns the private field
Field privateField = RentCar.class.getDeclaredField("type");
String name = privateField.getName();
System.out.println("One private Fieldname is: " + name);
// makes this private field instance accessible
// for reflection use only, not normal code
privateField.setAccessible(true);
// get the value of this private field
String fieldValue = (String) privateField.get(rent);
System.out.println("fieldValue = " + fieldValue);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}