private static TemplateRenderer tryToCompile(String source, Map<String, String> expressions)
throws NotFoundException, CannotCompileException, InstantiationException,
IllegalAccessException {
ClassPool cp = ClassPool.getDefault();
CtClass sup = cp.get(Object.class.getCanonicalName());
CtClass cls = cp.makeClass("RapidoidTemplate" + ID_GEN.incrementAndGet(), sup);
cls.addInterface(cp.get(TemplateRenderer.class.getCanonicalName()));
cls.addConstructor(CtNewConstructor.defaultConstructor(cls));
for (Map.Entry<String, String> expr : expressions.entrySet()) {
String fld =
"private static final org.rapidoid.render.retriever.ValueRetriever %s = org.rapidoid.render.retriever.Retriever.of(%s);";
String retrieverId = retrieverId(expr.getKey());
String prop = expr.getValue();
String field = U.frmt(fld, retrieverId, prop);
cls.addField(CtField.make(field, cls));
}
CtClass[] params = {cp.get(RenderCtx.class.getCanonicalName())};
CtClass clsVoid = cp.get(void.class.getCanonicalName());
cls.addMethod(
CtNewMethod.make(Modifier.PUBLIC, clsVoid, "render", params, new CtClass[0], source, cls));
return (TemplateRenderer) cls.toClass().newInstance();
}
private Invoker generateInvoker(final CtClass ctClass, final StringBuilder methodSrc) {
try {
ctClass.addMethod(CtMethod.make(methodSrc.toString(), ctClass));
ctClass.addConstructor(CtNewConstructor.defaultConstructor(ctClass));
final Class generatedClass = ctClass.toClass();
return (Invoker) generatedClass.newInstance();
} catch (CannotCompileException e) {
throw new RuntimeException("Unable to compile generated source: " + methodSrc, e);
} catch (InstantiationException e) {
throw new RuntimeException("Unable to compile generated source: " + methodSrc, e);
} catch (IllegalAccessException e) {
throw new RuntimeException("Unable to compile generated source: " + methodSrc, e);
}
}
public void onWrite(ClassPool pool, String className)
throws NotFoundException, CannotCompileException {
CtClass cc = pool.get(className);
try {
if (isPersistent(className)) {
CtClass base = cc.getSuperclass();
CtConstructor cons = new CtConstructor(constructorParams, cc);
if (base.subclassOf(persistent) || base == object) {
cons.setBody(null);
cc.addConstructor(cons);
if (base == object) {
cc.setSuperclass(persistent);
}
} else {
if (!isPersistent(base.getName())) {
throw new NotFoundException(
"Base class " + base.getName() + " was not declared as persistent");
}
cons.setBody("super($0);");
cc.addConstructor(cons);
}
preprocessMethods(cc, true, true);
if (base == persistent || base == object) {
CtMethod m = new CtMethod(isRecursive, cc, null);
m.setBody("return false;");
cc.addMethod(m);
addSerializeMethods(cc, false);
} else if (base.subtypeOf(serializable)) {
addSerializeMethods(cc, true);
}
if ((cc.getModifiers() & Modifier.PRIVATE) == 0) {
CtClass f = pool.makeClass(className + "LoadFactory");
f.addInterface(factory);
CtMethod c = new CtMethod(create, f, null);
c.setBody("return new " + className + "($1);");
f.addMethod(c);
CtNewConstructor.defaultConstructor(f);
}
} else {
preprocessMethods(
cc, cc.subtypeOf(persistent) && cc != persistent, !className.startsWith("org.nachodb"));
}
} catch (Exception x) {
x.printStackTrace();
}
}
@Override
public void enhanceThisClass(ApplicationClass applicationClass) throws Exception {
final CtClass ctClass = makeClass(applicationClass);
if (ctClass.isInterface()) {
return;
}
if (ctClass.getName().endsWith(".package")) {
return;
}
// Add a default constructor if needed
try {
boolean hasDefaultConstructor = false;
for (CtConstructor constructor : ctClass.getDeclaredConstructors()) {
if (constructor.getParameterTypes().length == 0) {
hasDefaultConstructor = true;
break;
}
}
if (!hasDefaultConstructor && !ctClass.isInterface()) {
CtConstructor defaultConstructor =
CtNewConstructor.make("public " + ctClass.getSimpleName() + "() {}", ctClass);
ctClass.addConstructor(defaultConstructor);
}
} catch (Exception e) {
Logger.error(e, "Error in PropertiesEnhancer");
throw new UnexpectedException("Error in PropertiesEnhancer", e);
}
if (isScala(applicationClass)) {
// Temporary hack for Scala. Done.
applicationClass.enhancedByteCode = ctClass.toBytecode();
ctClass.defrost();
return;
}
for (CtField ctField : ctClass.getDeclaredFields()) {
try {
if (isProperty(ctField)) {
// Property name
String propertyName =
ctField.getName().substring(0, 1).toUpperCase() + ctField.getName().substring(1);
String getter = "get" + propertyName;
String setter = "set" + propertyName;
try {
CtMethod ctMethod = ctClass.getDeclaredMethod(getter);
if (ctMethod.getParameterTypes().length > 0
|| Modifier.isStatic(ctMethod.getModifiers())) {
throw new NotFoundException("it's not a getter !");
}
} catch (NotFoundException noGetter) {
// Créé le getter
String code =
"public "
+ ctField.getType().getName()
+ " "
+ getter
+ "() { return this."
+ ctField.getName()
+ "; }";
CtMethod getMethod = CtMethod.make(code, ctClass);
getMethod.setModifiers(getMethod.getModifiers() | AccessFlag.SYNTHETIC);
ctClass.addMethod(getMethod);
}
if (!isFinal(ctField)) {
try {
CtMethod ctMethod = ctClass.getDeclaredMethod(setter);
if (ctMethod.getParameterTypes().length != 1
|| !ctMethod.getParameterTypes()[0].equals(ctField.getType())
|| Modifier.isStatic(ctMethod.getModifiers())) {
throw new NotFoundException("it's not a setter !");
}
} catch (NotFoundException noSetter) {
// Créé le setter
CtMethod setMethod =
CtMethod.make(
"public void "
+ setter
+ "("
+ ctField.getType().getName()
+ " value) { this."
+ ctField.getName()
+ " = value; }",
ctClass);
setMethod.setModifiers(setMethod.getModifiers() | AccessFlag.SYNTHETIC);
ctClass.addMethod(setMethod);
createAnnotation(getAnnotations(setMethod), PlayPropertyAccessor.class);
}
}
}
} catch (Exception e) {
Logger.error(e, "Error in PropertiesEnhancer");
throw new UnexpectedException("Error in PropertiesEnhancer", e);
}
}
// Add a default constructor if needed
try {
boolean hasDefaultConstructor = false;
for (CtConstructor constructor : ctClass.getDeclaredConstructors()) {
if (constructor.getParameterTypes().length == 0) {
hasDefaultConstructor = true;
break;
}
}
if (!hasDefaultConstructor) {
CtConstructor defaultConstructor = CtNewConstructor.defaultConstructor(ctClass);
ctClass.addConstructor(defaultConstructor);
}
} catch (Exception e) {
Logger.error(e, "Error in PropertiesEnhancer");
throw new UnexpectedException("Error in PropertiesEnhancer", e);
}
// Intercept all fields access
for (final CtBehavior ctMethod : ctClass.getDeclaredBehaviors()) {
ctMethod.instrument(
new ExprEditor() {
@Override
public void edit(FieldAccess fieldAccess) throws CannotCompileException {
try {
// Acces à une property ?
if (isProperty(fieldAccess.getField())) {
// TODO : vérifier que c'est bien un champ d'une classe de l'application
// (fieldAccess.getClassName())
// Si c'est un getter ou un setter
String propertyName = null;
if (fieldAccess
.getField()
.getDeclaringClass()
.equals(ctMethod.getDeclaringClass())
|| ctMethod
.getDeclaringClass()
.subclassOf(fieldAccess.getField().getDeclaringClass())) {
if ((ctMethod.getName().startsWith("get")
|| (!isFinal(fieldAccess.getField())
&& ctMethod.getName().startsWith("set")))
&& ctMethod.getName().length() > 3) {
propertyName = ctMethod.getName().substring(3);
propertyName =
propertyName.substring(0, 1).toLowerCase() + propertyName.substring(1);
}
}
// On n'intercepte pas le getter de sa propre property
if (propertyName == null || !propertyName.equals(fieldAccess.getFieldName())) {
String invocationPoint =
ctClass.getName()
+ "."
+ ctMethod.getName()
+ ", line "
+ fieldAccess.getLineNumber();
if (fieldAccess.isReader()) {
// Réécris l'accés en lecture à la property
fieldAccess.replace(
"$_ = ($r)play.classloading.enhancers.PropertiesEnhancer.FieldAccessor.invokeReadProperty($0, \""
+ fieldAccess.getFieldName()
+ "\", \""
+ fieldAccess.getClassName()
+ "\", \""
+ invocationPoint
+ "\");");
} else if (!isFinal(fieldAccess.getField()) && fieldAccess.isWriter()) {
// Réécris l'accés en ecriture à la property
fieldAccess.replace(
"play.classloading.enhancers.PropertiesEnhancer.FieldAccessor.invokeWriteProperty($0, \""
+ fieldAccess.getFieldName()
+ "\", "
+ fieldAccess.getField().getType().getName()
+ ".class, $1, \""
+ fieldAccess.getClassName()
+ "\", \""
+ invocationPoint
+ "\");");
}
}
}
} catch (Exception e) {
throw new UnexpectedException("Error in PropertiesEnhancer", e);
}
}
});
}
// Done.
applicationClass.enhancedByteCode = ctClass.toBytecode();
ctClass.defrost();
}
public ClazzInfo classProcessing(String clazzName)
throws NotFoundException, CannotCompileException {
ClassPool classPool = ClassPool.getDefault();
CtClass cz = classPool.get(clazzName);
classPool.importPackage(clazzName); // 继承
classPool.importPackage("java.lang.reflect.Method"); // 添加反射引用
CtClass newClass = classPool.makeClass(clazzName + "$MC_IMPL"); // 新建代理类
newClass.setSuperclass(cz); // 继承
// 构造块
CtConstructor tempC;
CtConstructor[] ctConstructors = cz.getDeclaredConstructors();
newClass.addConstructor(CtNewConstructor.defaultConstructor(newClass));
for (CtConstructor c : ctConstructors) {
try {
tempC = CtNewConstructor.copy(c, newClass, null);
tempC.setBody("{super($$);}");
newClass.addConstructor(tempC);
} catch (Exception e) {
// e.printStackTrace();
}
}
// 字段块
// CtField[] ctFields = cz.getDeclaredFields();
// for (CtField f : ctFields)
// System.out.println(f.getFieldInfo().getConstantValue());
// 方法块
CtMethod[] ctMethods = cz.getDeclaredMethods();
CtMethod tempM; // 复制方法名
Map<String, Method> tempMethod = new HashMap<String, Method>();
for (CtMethod m : ctMethods) {
tempMethod.put(
String.format(
"%s %s %s(%s);",
Modifier.toString(m.getModifiers()),
m.getReturnType().getName(),
m.getName(),
Util.getParameterTypes(m.getParameterTypes())),
null);
// System.err.println(String.format("%s %s %s(%s);", Modifier.toString(m.getModifiers()),
// m.getReturnType().getName(), m.getName(), Util.getParameterTypes(m.getParameterTypes())));
tempM = CtNewMethod.copy(m, newClass, null);
if ("void".equals(tempM.getReturnType().getName()))
tempM.setBody("{super." + tempM.getName() + "($$);}");
else tempM.setBody("{ return super." + tempM.getName() + "($$);}");
// CtNewMethod.make(src, declaring, delegateObj, delegateMethod)
// 方法修改
// if (m.getName().equals("x")) {
// //tempM.setBody("{$proceed($$);}", "this", "mba");
// //tempM.setBody("{n nn = new n();" + "Method a = n.class.getDeclaredMethod(\"a\", new
// Class[] { Integer.TYPE });" + "a.invoke(nn, new Object[] { Integer.valueOf(1) });}");
// tempM.setBody("{Method a = n.class.getDeclaredMethod(\"axx\", new Class[] { Integer.TYPE
// });}");
// }
newClass.addMethod(tempM);
}
// 测试输出
try {
newClass.writeFile("D:/Desktop");
} catch (IOException e) {
e.printStackTrace();
}
// Class clazz = newClass.toClass();
// System.out.println(clazz.getCanonicalName());
// DefaultCachePoolFactory.newInstance().addNFloop4Map(new ClazzInfo(clazz, tempMethod),
// DefaultPool.NORNAL_BEAN, clazz.getCanonicalName());
// return clazz;
return new ClazzInfo(newClass.toClass(), tempMethod);
}
/**
* Given a bean-style interface, generate an instance of the interface by implementing getters and
* setters for each property. It will also add implementations to support the {@link
* SupportsRdfId} interface and generate simple, default equals, toString and hashCode methods.
*
* <p>If there are other non-bean style (getter and/or setter's for properties) methods on the
* interface, this will likely fail to generate the instance.
*
* @param theInterface the interface to build an instance of
* @param <T> the type of the interface
* @return New dynamically generated bytecode of a class that implements the given interface.
* @throws Exception if there is an error while generating the bytecode of the new class.
*/
public static synchronized <T> Class<T> generateInstanceClass(Class<T> theInterface)
throws Exception {
processedMethods.clear();
// TODO: can we use some sort of template language for this?
ClassPool aPool = ClassPool.getDefault();
aPool.appendClassPath(new LoaderClassPath(theInterface.getClassLoader()));
CtClass aInterface = aPool.get(theInterface.getName());
CtClass aSupportsRdfIdInterface = aPool.get(SupportsRdfId.class.getName());
CtClass aEmpireGeneratedInterface = aPool.get(EmpireGenerated.class.getName());
if (!Arrays.asList(aInterface.getInterfaces()).contains(aSupportsRdfIdInterface)
&& !SupportsRdfId.class.isAssignableFrom(theInterface)) {
throw new IllegalArgumentException(
"Class '"
+ theInterface.getName()
+ "' does not implement SupportsRdfId, cannot generate Empire suitable implementation.");
}
String aName = aInterface.getPackageName() + ".impl." + aInterface.getSimpleName() + "Impl";
CtClass aClass = null;
try {
// i had a good reason for doing this, but i dont remember what it is. when i do, i'll
// explain it here =)
aClass = aPool.get(aName);
return (Class<T>) BeanReflectUtil.loadClass(aName);
} catch (NotFoundException e) {
aClass =
aPool.makeClass(
aInterface.getPackageName() + ".impl." + aInterface.getSimpleName() + "Impl");
} catch (ClassNotFoundException e) {
throw new Exception("Previously created class cannot be loaded.", e);
}
if (aClass.isFrozen()) {
aClass.defrost();
}
if (aInterface.isInterface()) {
aClass.addInterface(aInterface);
} else {
aClass.setSuperclass(aInterface);
}
aClass.addInterface(aSupportsRdfIdInterface);
aClass.addInterface(aEmpireGeneratedInterface);
CtField aInterfaceField =
new CtField(aPool.get(Class.class.getName()), "mInterfaceClass", aClass);
aClass.addField(
aInterfaceField, CtField.Initializer.byExpr(theInterface.getName() + ".class;"));
CtField aAllTriplesField = new CtField(aPool.get(Graph.class.getName()), "mAllTriples", aClass);
aClass.addField(
aAllTriplesField, CtField.Initializer.byExpr("new com.clarkparsia.openrdf.ExtGraph();"));
CtField aInstanceTriplesField =
new CtField(aPool.get(Graph.class.getName()), "mInstanceTriples", aClass);
aClass.addField(
aInstanceTriplesField,
CtField.Initializer.byExpr("new com.clarkparsia.openrdf.ExtGraph();"));
aClass.addConstructor(CtNewConstructor.defaultConstructor(aClass));
generateMethods(theInterface, aPool, aClass);
generateMethodsForSuperInterfaces(theInterface, aPool, aClass);
CtField aIdField = new CtField(aPool.get(SupportsRdfId.class.getName()), "supportsId", aClass);
aClass.addField(
aIdField,
CtField.Initializer.byExpr("new com.clarkparsia.empire.annotation.SupportsRdfIdImpl();"));
if (!hasMethod(aClass, "getRdfId")) {
aClass.addMethod(
CtNewMethod.make(
"public com.clarkparsia.empire.SupportsRdfId.RdfKey getRdfId() { return supportsId.getRdfId(); } ",
aClass));
}
if (!hasMethod(aClass, "setRdfId")) {
aClass.addMethod(
CtNewMethod.make(
"public void setRdfId(com.clarkparsia.empire.SupportsRdfId.RdfKey theURI) { supportsId.setRdfId(theURI); } ",
aClass));
}
if (!hasMethod(aClass, "getAllTriples")) {
aClass.addMethod(
CtNewMethod.make(
"public org.openrdf.model.Graph getAllTriples() { return mAllTriples; } ", aClass));
}
if (!hasMethod(aClass, "setAllTriples")) {
aClass.addMethod(
CtNewMethod.make(
"public void setAllTriples(org.openrdf.model.Graph theGraph) { mAllTriples = theGraph; } ",
aClass));
}
if (!hasMethod(aClass, "getInstanceTriples")) {
aClass.addMethod(
CtNewMethod.make(
"public org.openrdf.model.Graph getInstanceTriples() { return mInstanceTriples; } ",
aClass));
}
if (!hasMethod(aClass, "setInstanceTriples")) {
aClass.addMethod(
CtNewMethod.make(
"public void setInstanceTriples(org.openrdf.model.Graph theGraph) { mInstanceTriples = theGraph; } ",
aClass));
}
String equalsMethodBody =
"public boolean equals(Object theObj) {\n"
+ " if (theObj == this) return true;\n"
+ " if (!(theObj instanceof com.clarkparsia.empire.SupportsRdfId)) return false;\n"
+ " if (!(mInterfaceClass.isAssignableFrom(theObj.getClass()))) return false;\n"
+ " return getRdfId().equals( ((com.clarkparsia.empire.SupportsRdfId) theObj).getRdfId()) && super.equals(theObj);\n"
+ "}\n";
aClass.addMethod(CtNewMethod.make(equalsMethodBody, aClass));
if (theInterface.isInterface()) {
aClass.addMethod(
CtNewMethod.make(
"public String toString() { return getRdfId() != null ? getRdfId().toString() : super.toString(); } ",
aClass));
aClass.addMethod(
CtNewMethod.make(
"public int hashCode() { return getRdfId() != null ? getRdfId().hashCode() : 0; } ",
aClass));
}
aClass.freeze();
Class<T> aResult = (Class<T>) aClass.toClass();
try {
// make sure this is a valid class, that is, we can create instances of it!
aResult.newInstance();
} catch (Exception ex) {
// TODO: log this?
throw ex;
}
return aResult;
}
// 用javassit得到动态代理
public T createJavassistBytecodeDynamicProxy(
LoadBalancer loadBalance, ConcurrentMap<String, T> map, Class ifaces) {
try {
ClassPool mPool = new ClassPool(true);
CtClass mCtc = mPool.makeClass(ifaces.getName() + "JavaassistProxy");
mCtc.addInterface(mPool.get(ifaces.getName()));
mCtc.addConstructor(CtNewConstructor.defaultConstructor(mCtc));
mCtc.addField(CtField.make("public " + loadBalance.getClass().getName() + " sub;", mCtc));
mCtc.addField(CtField.make("public " + map.getClass().getName() + " map;", mCtc));
// mCtc.addField(CtField.make("public " + ArrayList.class.getName() + " list;",
// mCtc));
mCtc.addMethod(
CtNewMethod.make(
"public Object getRealClient() { return (Object)sub.select(new "
+ ArrayList.class.getName()
+ "(map.values())); }",
mCtc));
// 获取接口的方法
for (Method method : ifaces.getMethods()) {
Class returnType = method.getReturnType();
String modifiers = "public";
if (Modifier.PUBLIC == method.getModifiers()) {
modifiers = "public";
} else if (Modifier.PROTECTED == method.getModifiers()) {
modifiers = "protected";
} else if (Modifier.PRIVATE == method.getModifiers()) {
modifiers = "private";
}
Class<?>[] parameter = method.getParameterTypes();
String params = "";
String ps = "";
for (Class param : parameter) {
params += param.getName() + " " + param.getName() + ",";
ps += param.getName() + ",";
}
if (params.equals("")) {
params = "";
ps = "";
} else {
params = params.substring(0, params.length());
ps = ps.substring(0, ps.length());
}
mCtc.addMethod(
CtNewMethod.make(
modifiers
+ " void "
+ method.getName()
+ "(String a,String b){ Object t=this.getRealClient(); return (("
+ ifaces.getName()
+ ")t)."
+ method.getName()
+ "(a,b) ;}",
mCtc));
// mCtc.addMethod(CtNewMethod.make("public int count() { return
// delegate.count(); }", mCtc));
}
Class<?> pc = mCtc.toClass();
mCtc.debugWriteFile("/home/liguojun");
mCtc.writeFile("/home/liguojun");
T bytecodeProxy = (T) pc.newInstance();
Field filed = bytecodeProxy.getClass().getField("sub");
filed.set(bytecodeProxy, loadBalance);
Field filed1 = bytecodeProxy.getClass().getField("map");
filed1.set(bytecodeProxy, map);
return bytecodeProxy;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
