@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (context != null ? context.hashCode() : 0);
result = 31 * result + (className != null ? className.hashCode() : 0);
result = 31 * result + (superClass != null ? superClass.hashCode() : 0);
result = 31 * result + (interfaces != null ? interfaces.hashCode() : 0);
result = 31 * result + (scope != null ? scope.hashCode() : 0);
result = 31 * result + (isArray ? 1 : 0);
result = 31 * result + dimensions;
result = 31 * result + (isInterface ? 1 : 0);
result = 31 * result + (isAbstract ? 1 : 0);
result = 31 * result + (isFinal ? 1 : 0);
result = 31 * result + (isStatic ? 1 : 0);
result = 31 * result + (isInner ? 1 : 0);
result = 31 * result + (methods != null ? methods.hashCode() : 0);
result = 31 * result + (fields != null ? fields.hashCode() : 0);
result = 31 * result + (constructors != null ? constructors.hashCode() : 0);
result = 31 * result + (typeVariables != null ? typeVariables.hashCode() : 0);
result = 31 * result + (reifiedFormOf != null ? reifiedFormOf.hashCode() : 0);
result = 31 * result + (_nameCache != null ? _nameCache.hashCode() : 0);
result = 31 * result + (_methodsCache != null ? Arrays.hashCode(_methodsCache) : 0);
result = 31 * result + (_fieldsCache != null ? Arrays.hashCode(_fieldsCache) : 0);
result = 31 * result + (_constructorsCache != null ? Arrays.hashCode(_constructorsCache) : 0);
result = 31 * result + (generatedCache != null ? generatedCache.hashCode() : 0);
return result;
}
@Override
public Collection<MetaClass> provideTypesToExpose() {
final Set<MetaClass> types = new HashSet<MetaClass>();
for (final MetaClass metaClass : ClassScanner.getTypesAnnotatedWith(Remote.class)) {
for (final MetaMethod method : metaClass.getDeclaredMethods()) {
if (!method.getReturnType().isVoid()) {
types.add(method.getReturnType().getErased());
}
for (final MetaParameter parameter : method.getParameters()) {
final MetaClass type = parameter.getType();
types.add(type.getErased());
final MetaParameterizedType parameterizedType = type.getParameterizedType();
if (parameterizedType != null) {
for (final MetaType tp : parameterizedType.getTypeParameters()) {
if (tp instanceof MetaClass) {
types.add(((MetaClass) tp).getErased());
}
}
}
}
}
}
return types;
}
private static List<MetaField> getAllFields(MetaClass c) {
ArrayList<MetaField> fields = new ArrayList<MetaField>();
for (; c != null; c = c.getSuperClass()) {
fields.addAll(Arrays.asList(c.getDeclaredFields()));
}
return fields;
}
public static MetaMethod findCaseInsensitiveMatch(
final MetaClass retType, final MetaClass clazz, final String name, final MetaClass... parms) {
MetaClass c = clazz;
do {
Outer:
for (final MetaMethod method : c.getDeclaredMethods()) {
if (name.equalsIgnoreCase(method.getName())) {
if (parms.length != method.getParameters().length) continue;
final MetaParameter[] mps = method.getParameters();
for (int i = 0; i < parms.length; i++) {
if (!parms[i]
.getFullyQualifiedName()
.equals(mps[i].getType().getFullyQualifiedName())) {
continue Outer;
}
}
if (retType != null
&& !retType
.getFullyQualifiedName()
.equals(method.getReturnType().getFullyQualifiedName())) {
continue;
}
return method;
}
}
} while ((c = c.getSuperClass()) != null);
return null;
}
public static BuildMetaClass makeProxy(final MetaClass toProxy,
final String privateAccessorType,
final Map<String, ProxyProperty> proxyProperties,
final Map<MetaMethod, Map<WeaveType, Collection<Statement>>> weavingStatements) {
return makeProxy(
PrivateAccessUtil.condensify(toProxy.getPackageName()) + "_" + toProxy.getName() + "_proxy",
toProxy,
privateAccessorType, proxyProperties, weavingStatements);
}
public static int getArrayDimensions(final MetaClass type) {
if (!type.isArray()) return 0;
final String internalName = type.getInternalName();
for (int i = 0; i < internalName.length(); i++) {
if (internalName.charAt(i) != '[') return i;
}
return 0;
}
public static boolean canConvert(final MetaClass to, final MetaClass from) {
try {
final Class<?> fromClazz = from.asClass();
final Class<?> toClass = to.asClass();
return DataConversion.canConvert(toClass, fromClazz);
} catch (Throwable t) {
return false;
}
}
private static void fillInInterfacesAndSuperTypes(
final Set<MetaClass> set, final MetaClass type) {
for (final MetaClass iface : type.getInterfaces()) {
set.add(iface);
fillInInterfacesAndSuperTypes(set, iface);
}
if (type.getSuperClass() != null) {
fillInInterfacesAndSuperTypes(set, type.getSuperClass());
}
}
public static Scope scopeOf(final MetaClass clazz) {
if (clazz.isPublic()) {
return Scope.Public;
} else if (clazz.isPrivate()) {
return Scope.Private;
} else if (clazz.isProtected()) {
return Scope.Protected;
} else {
return Scope.Package;
}
}
/**
* Ensures the provided type is a {@link DataBinder} and throws a {@link GenerationException} in
* case it's not.
*
* @param type the type to check
*/
private static void assertTypeIsDataBinder(MetaClass type) {
final MetaClass databinderMetaClass = MetaClassFactory.get(DataBinder.class);
if (!databinderMetaClass.isAssignableFrom(type)) {
throw new GenerationException(
"Type of @AutoBound element must be "
+ DataBinder.class.getName()
+ " but is: "
+ type.getFullyQualifiedName());
}
}
/**
* Tries to find a reference for an injected {@link AutoBound} data binder.
*
* @return the data binder reference or null if not found.
*/
private static DataBinderRef lookupAutoBoundBinder(final InjectableInstance<?> inst) {
Statement dataBinderRef = null;
MetaClass dataModelType = null;
InjectUtil.BeanMetric beanMetric =
InjectUtil.getFilteredBeanMetric(
inst.getInjectionContext(), inst.getInjector().getInjectedType(), AutoBound.class);
final Collection<Object> allInjectors = beanMetric.getAllInjectors();
if (allInjectors.size() > 1) {
throw new GenerationException(
"Multiple @AutoBound data binders injected in " + inst.getEnclosingType());
} else if (allInjectors.size() == 1) {
final Object injectorElement = allInjectors.iterator().next();
if (injectorElement instanceof MetaConstructor || injectorElement instanceof MetaMethod) {
final MetaParameter mp = beanMetric.getConsolidatedMetaParameters().iterator().next();
assertTypeIsDataBinder(mp.getType());
dataModelType = (MetaClass) mp.getType().getParameterizedType().getTypeParameters()[0];
dataBinderRef = inst.getInjectionContext().getInlineBeanReference(mp);
inst.ensureMemberExposed();
} else {
final MetaField field = (MetaField) allInjectors.iterator().next();
assertTypeIsDataBinder(field.getType());
dataModelType = (MetaClass) field.getType().getParameterizedType().getTypeParameters()[0];
dataBinderRef =
Stmt.invokeStatic(
inst.getInjectionContext().getProcessingContext().getBootstrapClass(),
PrivateAccessUtil.getPrivateFieldInjectorName(field),
Variable.get(inst.getInjector().getInstanceVarName()));
inst.getInjectionContext().addExposedField(field, PrivateAccessType.Both);
}
} else {
final MetaClass declaringClass = inst.getInjector().getInjectedType();
for (final MetaField field : declaringClass.getFields()) {
if (field.isAnnotationPresent(AutoBound.class)) {
assertTypeIsDataBinder(field.getType());
dataModelType = (MetaClass) field.getType().getParameterizedType().getTypeParameters()[0];
dataBinderRef =
Stmt.invokeStatic(
inst.getInjectionContext().getProcessingContext().getBootstrapClass(),
PrivateAccessUtil.getPrivateFieldInjectorName(field),
Variable.get(inst.getInjector().getInstanceVarName()));
inst.getInjectionContext().addExposedField(field, PrivateAccessType.Both);
break;
}
}
}
return (dataBinderRef != null) ? new DataBinderRef(dataModelType, dataBinderRef) : null;
}
private void createValidationError(Collection<MetaClass> pages, Class<?> role) {
StringBuilder builder = new StringBuilder();
for (MetaClass mc : pages) {
builder.append("\n ").append(mc.getFullyQualifiedName());
}
throw new GenerationException(
"Found more than one @Page with role = '"
+ role
+ "': "
+ builder
+ "\nExactly one @Page class must be designated with this unique role.");
}
public static int scoreInterface(final MetaClass parm, final MetaClass arg) {
if (parm.isInterface()) {
final MetaClass[] iface = arg.getInterfaces();
if (iface != null) {
for (final MetaClass c : iface) {
if (c == parm) return 1;
else if (parm.isAssignableFrom(c)) return scoreInterface(parm, arg.getSuperClass());
}
}
}
return 0;
}
/**
* Renders the page-to-page navigation graph into the file {@code navgraph.gv} in the {@code
* .errai} cache directory.
*/
private void renderNavigationToDotFile(BiMap<String, MetaClass> pages) {
final File dotFile = new File(RebindUtils.getErraiCacheDir().getAbsolutePath(), "navgraph.gv");
PrintWriter out = null;
try {
out = new PrintWriter(dotFile);
out.println("digraph Navigation {");
final MetaClass transitionToType = MetaClassFactory.get(TransitionTo.class);
final MetaClass transitionAnchorType = MetaClassFactory.get(TransitionAnchor.class);
final MetaClass transitionAnchorFactoryType =
MetaClassFactory.get(TransitionAnchorFactory.class);
for (Map.Entry<String, MetaClass> entry : pages.entrySet()) {
String pageName = entry.getKey();
MetaClass pageClass = entry.getValue();
// entry for the node itself
out.print("\"" + pageName + "\"");
Page pageAnnotation = pageClass.getAnnotation(Page.class);
List<Class<? extends PageRole>> roles = Arrays.asList(pageAnnotation.role());
if (roles.contains(DefaultPage.class)) {
out.print(" [penwidth=3]");
}
out.println();
for (MetaField field : getAllFields(pageClass)) {
if (field.getType().getErased().equals(transitionToType)
|| field.getType().getErased().equals(transitionAnchorType)
|| field.getType().getErased().equals(transitionAnchorFactoryType)) {
MetaType targetPageType = field.getType().getParameterizedType().getTypeParameters()[0];
String targetPageName = pages.inverse().get(targetPageType);
// entry for the link between nodes
out.println(
"\""
+ pageName
+ "\" -> \""
+ targetPageName
+ "\" [label=\""
+ field.getName()
+ "\"]");
}
}
}
out.println("}");
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
} finally {
if (out != null) {
out.close();
}
}
}
private Statement defaultValueStatement(MetaClass type) {
if (type.isPrimitive()) {
if (type.asBoxed().isAssignableTo(Number.class)) {
return Stmt.castTo(type, Stmt.load(0));
} else if (type.isAssignableTo(boolean.class)) {
return Stmt.load(false);
} else {
throw new UnsupportedOperationException(
"Don't know how to make a default value for @PageState field of type "
+ type.getFullyQualifiedName());
}
} else {
return Stmt.load(null);
}
}
public static Statement convert(final Context context, Object input, final MetaClass targetType) {
try {
if (input instanceof Statement) {
if (input instanceof LiteralValue<?>) {
input = ((LiteralValue<?>) input).getValue();
} else {
if ("null".equals(((Statement) input).generate(context))) {
return (Statement) input;
}
assertAssignableTypes(context, ((Statement) input).getType(), targetType);
return (Statement) input;
}
}
if (input != null
&& MetaClassFactory.get(input.getClass())
.getOuterComponentType()
.getFullyQualifiedName()
.equals(MetaClass.class.getName())) {
return generate(context, input);
}
if (Object.class.getName().equals(targetType.getFullyQualifiedName())) {
return generate(context, input);
}
Class<?> inputClass = input == null ? Object.class : input.getClass();
if (MetaClass.class.isAssignableFrom(inputClass)) {
inputClass = Class.class;
}
final Class<?> targetClass = targetType.asBoxed().asClass();
if (NullType.class.getName().equals(targetClass.getName())) {
return generate(context, input);
}
if (!targetClass.isAssignableFrom(inputClass)
&& DataConversion.canConvert(targetClass, inputClass)) {
return generate(context, DataConversion.convert(input, targetClass));
} else {
return generate(context, input);
}
} catch (NumberFormatException nfe) {
throw new InvalidTypeException(nfe);
}
}
@Override
public MetaMethod[] getMethods() {
if (_methodsCache != null) return _methodsCache;
MetaMethod[] methodArray = methods.toArray(new MetaMethod[methods.size()]);
MetaMethod[] outputMethods;
if (superClass != null) {
List<MetaMethod> methodList = new ArrayList<MetaMethod>();
for (MetaMethod m : superClass.getMethods()) {
if (_getMethod(methodArray, m.getName(), GenUtil.fromParameters(m.getParameters()))
== null) {
methodList.add(m);
}
}
methodList.addAll(Arrays.asList(methodArray));
outputMethods = methodList.toArray(new MetaMethod[methodList.size()]);
} else {
outputMethods = methodArray;
}
return _methodsCache = outputMethods;
}
private static Statement paramFromStringStatement(MetaClass toType, Statement stringValue) {
// make sure it's really a string
stringValue = Stmt.castTo(String.class, stringValue);
if (toType.isAssignableTo(String.class)) {
return stringValue;
} else if (toType.asBoxed().isAssignableTo(Number.class)) {
return Stmt.invokeStatic(toType.asBoxed(), "valueOf", stringValue);
} else if (toType.asBoxed().isAssignableTo(Boolean.class)) {
return Stmt.invokeStatic(Boolean.class, "valueOf", stringValue);
} else {
throw new UnsupportedOperationException(
"@PageState fields of type " + toType.getFullyQualifiedName() + " are not supported");
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof BuildMetaClass)) return false;
if (!super.equals(o)) return false;
BuildMetaClass that = (BuildMetaClass) o;
if (dimensions != that.dimensions) return false;
if (isAbstract != that.isAbstract) return false;
if (isArray != that.isArray) return false;
if (isFinal != that.isFinal) return false;
if (isInner != that.isInner) return false;
if (isInterface != that.isInterface) return false;
if (isStatic != that.isStatic) return false;
if (!Arrays.equals(_constructorsCache, that._constructorsCache)) return false;
if (!Arrays.equals(_fieldsCache, that._fieldsCache)) return false;
if (!Arrays.equals(_methodsCache, that._methodsCache)) return false;
if (_nameCache != null ? !_nameCache.equals(that._nameCache) : that._nameCache != null)
return false;
if (className != null ? !className.equals(that.className) : that.className != null)
return false;
if (constructors != null ? !constructors.equals(that.constructors) : that.constructors != null)
return false;
if (context != null ? !context.equals(that.context) : that.context != null) return false;
if (fields != null ? !fields.equals(that.fields) : that.fields != null) return false;
if (generatedCache != null
? !generatedCache.equals(that.generatedCache)
: that.generatedCache != null) return false;
if (interfaces != null ? !interfaces.equals(that.interfaces) : that.interfaces != null)
return false;
if (methods != null ? !methods.equals(that.methods) : that.methods != null) return false;
if (reifiedFormOf != null
? !reifiedFormOf.equals(that.reifiedFormOf)
: that.reifiedFormOf != null) return false;
if (scope != that.scope) return false;
if (superClass != null ? !superClass.equals(that.superClass) : that.superClass != null)
return false;
if (typeVariables != null
? !typeVariables.equals(that.typeVariables)
: that.typeVariables != null) return false;
return true;
}
@Override
public MetaClassMember getReadingMember() {
if (readingMember != null) {
return readingMember;
}
MetaMethod meth = toMap.getMethod(getterMethod, new MetaClass[0]);
meth.asMethod().setAccessible(true);
readingMember = meth;
if (readingMember == null) {
throw new RuntimeException(
"no such getter method: " + toMap.getFullyQualifiedName() + "." + getterMethod);
}
return readingMember;
}
/**
* Appends the method that calls the {@code @PageHidden} method of the widget.
*
* @param pageImplBuilder The class builder for the implementation of PageNode we are adding the
* method to.
* @param pageClass The "content type" (Widget subclass) of the page. This is the type the user
* annotated with {@code @Page}.
*/
private void appendPageHiddenMethod(
AnonymousClassStructureBuilder pageImplBuilder, MetaClass pageClass) {
BlockBuilder<?> method =
pageImplBuilder
.publicMethod(
void.class,
createMethodNameFromAnnotation(PageHidden.class),
Parameter.of(pageClass, "widget"))
.body();
checkMethodAndAddPrivateAccessors(
pageImplBuilder, method, pageClass, PageHidden.class, HistoryToken.class, "state");
if (pageClass.getAnnotation(Singleton.class) == null
&& pageClass.getAnnotation(ApplicationScoped.class) == null
&& pageClass.getAnnotation(EntryPoint.class) == null) {
method.append(Stmt.loadVariable("bm").invoke("destroyBean", Stmt.loadVariable("widget")));
}
method.finish();
}
public static MetaMethod getBestCandidate(
final MetaClass[] arguments,
final String method,
final MetaClass decl,
MetaMethod[] methods,
final boolean classTarget) {
if (methods == null || methods.length == 0) {
return null;
}
MetaParameter[] parmTypes;
MetaMethod bestCandidate = null;
int bestScore = 0;
int score;
boolean retry = false;
do {
for (final MetaMethod meth : methods) {
if (classTarget && (meth.isStatic())) continue;
if (method.equals(meth.getName())) {
final boolean isVarArgs = meth.isVarArgs();
if ((parmTypes = meth.getParameters()).length != arguments.length && !isVarArgs) {
continue;
} else if (arguments.length == 0 && parmTypes.length == 0) {
bestCandidate = meth;
break;
}
score = scoreMethods(arguments, parmTypes, isVarArgs);
if (score != 0 && score > bestScore) {
bestCandidate = meth;
bestScore = score;
}
}
}
if (!retry && bestCandidate == null && decl.isInterface()) {
final MetaMethod[] objMethods = Object_MetaClass.getMethods();
final MetaMethod[] nMethods = new MetaMethod[methods.length + objMethods.length];
System.arraycopy(methods, 0, nMethods, 0, methods.length);
System.arraycopy(objMethods, 0, nMethods, methods.length, objMethods.length);
methods = nMethods;
retry = true;
} else {
break;
}
} while (true);
return bestCandidate;
}
public static void assertAssignableTypes(
final Context context, final MetaClass from, final MetaClass to) {
if (!to.asBoxed().isAssignableFrom(from.asBoxed())) {
if (to.isArray()
&& from.isArray()
&& GenUtil.getArrayDimensions(to) == GenUtil.getArrayDimensions(from)
&& to.getOuterComponentType().isAssignableFrom(from.getOuterComponentType())) {
return;
}
if (!context.isPermissiveMode()) {
if (classAliases.contains(from.getFullyQualifiedName())
&& classAliases.contains(to.getFullyQualifiedName())) {
// handle convertibility between MetaClass API and java Class reference.
return;
}
throw new InvalidTypeException(
to.getFullyQualifiedName() + " is not assignable from " + from.getFullyQualifiedName());
}
}
}
public static boolean isNumericallyCoercible(final MetaClass target, final MetaClass parm) {
MetaClass boxedTarget = target.isPrimitive() ? target.asBoxed() : target;
if (boxedTarget != null && Number_MetaClass.isAssignableFrom(target)) {
if ((boxedTarget = parm.isPrimitive() ? parm.asBoxed() : parm) != null) {
return Number_MetaClass.isAssignableFrom(boxedTarget);
}
}
return false;
}
public static boolean isPrimitiveWrapper(final MetaClass clazz) {
return Integer.class.getName().equals(clazz.getFullyQualifiedName())
|| Boolean.class.getName().equals(clazz.getFullyQualifiedName())
|| Long.class.getName().equals(clazz.getFullyQualifiedName())
|| Double.class.getName().equals(clazz.getFullyQualifiedName())
|| Float.class.getName().equals(clazz.getFullyQualifiedName())
|| Short.class.getName().equals(clazz.getFullyQualifiedName())
|| Character.class.getName().equals(clazz.getFullyQualifiedName())
|| Byte.class.getName().equals(clazz.getFullyQualifiedName());
}
public static MetaClass getPrimitiveWrapper(final MetaClass clazz) {
if (clazz.isPrimitive()) {
if ("int".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Integer.class);
} else if ("boolean".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Boolean.class);
} else if ("long".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Long.class);
} else if ("double".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Double.class);
} else if ("float".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Float.class);
} else if ("short".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Short.class);
} else if ("char".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Character.class);
} else if ("byte".equals(clazz.getCanonicalName())) {
return MetaClassFactory.get(Byte.class);
}
}
return clazz;
}
public static MetaClass getUnboxedFromWrapper(final MetaClass clazz) {
if (Integer.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(int.class);
} else if (Boolean.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(boolean.class);
} else if (Long.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(long.class);
} else if (Double.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(double.class);
} else if (Float.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(float.class);
} else if (Short.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(short.class);
} else if (Character.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(char.class);
} else if (Byte.class.getName().equals(clazz.getFullyQualifiedName())) {
return MetaClassFactory.get(byte.class);
}
return clazz;
}
public ProxyInjector(final IOCProcessingContext context,
final MetaClass proxiedType,
final QualifyingMetadata metadata) {
Assert.notNull(proxiedType);
Assert.notNull(metadata);
this.proxiedType = proxiedType;
this.varName = InjectUtil.getNewInjectorName() + "_proxy";
this.qualifyingMetadata = AbstractInjector.getMetadataWithAny(metadata);
final String proxyClassName = proxiedType.getName() + "_" + varName;
this.closeStatements = new ArrayList<Statement>();
this.proxyClass = ProxyMaker.makeProxy(proxyClassName, proxiedType, context.isGwtTarget() ? "jsni" : "reflection");
this.proxyClass.setStatic(true);
this.proxyClass.setScope(Scope.Package);
context.getBootstrapClass()
.addInnerClass(new InnerClass(proxyClass));
}
BuildMetaClass make(final String proxyClassName,
final MetaClass toProxy,
final String privateAccessorType) {
final ClassStructureBuilder builder;
final boolean renderEqualsAndHash;
if (!toProxy.isInterface()) {
renderEqualsAndHash = true;
if (toProxy.isFinal()) {
throw new UnproxyableClassException(toProxy, toProxy.getFullyQualifiedName()
+ " is an unproxiable class because it is final");
}
if (!toProxy.isDefaultInstantiable()) {
throw new UnproxyableClassException(toProxy, toProxy.getFullyQualifiedName() + " must have a default " +
"no-arg constructor");
}
builder = ClassBuilder.define(proxyClassName, toProxy).publicScope().body();
}
else {
renderEqualsAndHash = false;
builder = ClassBuilder.define(proxyClassName).publicScope().implementsInterface(toProxy).body();
}
final String proxyVar = "$$_proxy_$$";
final Set<String> renderedMethods = new HashSet<String>();
final Map<String, MetaType> typeVariableMap = new HashMap<String, MetaType>();
final MetaParameterizedType metaParameterizedType = toProxy.getParameterizedType();
if (metaParameterizedType != null) {
int i = 0;
for (final MetaTypeVariable metaTypeVariable : toProxy.getTypeParameters()) {
typeVariableMap.put(metaTypeVariable.getName(), metaParameterizedType.getTypeParameters()[i++]);
}
}
builder.privateField(proxyVar, toProxy).finish();
final Set<Map.Entry<String, ProxyProperty>> entries = proxyProperties.entrySet();
for (final Map.Entry<String, ProxyProperty> entry : entries) {
builder.privateField(entry.getValue().getEncodedProperty(), entry.getValue().getType()).finish();
builder.packageMethod(void.class, "$set_" + entry.getKey(), Parameter.of(entry.getValue().getType(), "o"))
.append(Stmt.loadVariable(entry.getValue().getEncodedProperty()).assignValue(Refs.get("o")))
.finish();
}
for (final MetaMethod method : toProxy.getMethods()) {
final String methodString = GenUtil.getMethodString(method);
if (renderedMethods.contains(methodString) || method.getName().equals("hashCode")
|| (method.getName().equals("equals") && method.getParameters().length == 1
&& method.getParameters()[0].getType().getFullyQualifiedName().equals(Object.class.getName()))) continue;
renderedMethods.add(methodString);
if ((!method.isPublic() && !method.isProtected()) ||
method.isSynthetic() ||
method.isFinal() ||
method.isStatic() ||
method.getDeclaringClass().getFullyQualifiedName().equals(Object.class.getName()))
continue;
final List<Parameter> methodParms = new ArrayList<Parameter>();
final MetaParameter[] parameters = method.getParameters();
for (int i = 0; i < parameters.length; i++) {
methodParms.add(Parameter.of(parameters[i].getType().getErased(), "a" + i));
}
final DefParameters defParameters = DefParameters.fromParameters(methodParms);
final BlockBuilder methBody = builder.publicMethod(method.getReturnType(), method.getName())
.annotatedWith(OVERRIDE_ANNOTATION)
.parameters(defParameters)
.throws_(method.getCheckedExceptions());
methBody.appendAll(getAroundInvokeStatements(method));
methBody.appendAll(getBeforeStatements(method));
final List<Parameter> parms = defParameters.getParameters();
final Statement[] statementVars = new Statement[parms.size()];
for (int i = 0; i < parms.size(); i++) {
statementVars[i] = loadVariable(parms.get(i).getName());
}
if (!method.isPublic()) {
PrivateAccessUtil.addPrivateAccessStubs(privateAccessorType, builder, method, new Modifier[0]);
final Statement[] privateAccessStmts = new Statement[statementVars.length + 1];
privateAccessStmts[0] = Refs.get(proxyVar);
System.arraycopy(statementVars, 0, privateAccessStmts, 1, statementVars.length);
if (method.getReturnType().isVoid()) {
methBody._(loadVariable("this").invoke(PrivateAccessUtil.getPrivateMethodName(method), privateAccessStmts));
}
else {
methBody._(loadVariable("this").invoke(PrivateAccessUtil.getPrivateMethodName(method), privateAccessStmts).returnValue());
}
}
else {
if (method.getReturnType().isVoid()) {
methBody._(loadVariable(proxyVar).invoke(method, statementVars));
}
else {
methBody._(loadVariable(proxyVar).invoke(method, statementVars).returnValue());
}
}
methBody.appendAll(getAfterStatements(method));
methBody.appendAll(getAroundInvokeStatements(method));
methBody.finish();
}
if (renderEqualsAndHash) {
// implement hashCode()
builder.publicMethod(int.class, "hashCode")
.annotatedWith(OVERRIDE_ANNOTATION)
.body()
._(
If.isNull(loadVariable(proxyVar))
._(throw_(IllegalStateException.class, "call to hashCode() on an unclosed proxy."))
.finish()
.else_()
._(Stmt.loadVariable(proxyVar).invoke("hashCode").returnValue())
.finish()
)
.finish();
// implements equals()
builder.publicMethod(boolean.class, "equals", Parameter.of(Object.class, "o"))
.annotatedWith(OVERRIDE_ANNOTATION)
.body()
._(
If.isNull(loadVariable(proxyVar))
._(throw_(IllegalStateException.class, "call to equals() on an unclosed proxy."))
.finish()
.else_()
._(Stmt.loadVariable(proxyVar).invoke("equals", Refs.get("o")).returnValue())
.finish()
)
.finish();
}
builder.publicMethod(void.class, PROXY_BIND_METHOD).parameters(DefParameters.of(Parameter.of(toProxy, "proxy")))
._(loadVariable(proxyVar).assignValue(loadVariable("proxy"))).finish();
return builder.getClassDefinition();
}
/**
* Implementation for the same-named public methods.
*
* @param o The object to snapshot.
* @param typeToSnapshot The type to read the snapshot attributes from. Must be a superclass of o
* or an interface implemented by o, and methods not supplied by {@code methodBodyCallback}
* must meed the requirements laid out in the class-level SnapshotMaker documentation.
* @param typeToExtend The type of the snapshot to produce. Must be a subclass or subinterface of
* typeToSnapshot, and the additional methods present in typeToExtend vs. typeToSnapshot must
* be provided by the MethodMaker callback, since they can't be generated from o.
* @param typesToRecurseOn Types for which this method should be called recursively.
* @param methodBodyCallback A callback that can provide method bodies, preventing the standard
* snapshot behaviour for those methods. This callback is optional; null is acceptable as "no
* callback."
* @param existingSnapshots Object instances for which a snapshot has already been completed.
* Bootstrap this with an empty IdentityHashMap.
* @param unfinishedSnapshots Object instances for which a partially-completed snapshot exists. If
* one of these objects is returned by a method in {@code o}, this causes a
* CyclicalObjectGraphException.
* @return A Statement of type {@code typeToExtend} that represents the current publicly visible
* state of {@code o}.
*/
private static Statement makeSnapshotAsSubclass(
final Object o,
final MetaClass typeToSnapshot,
final MetaClass typeToExtend,
final MethodBodyCallback methodBodyCallback,
final Set<MetaClass> typesToRecurseOn,
final IdentityHashMap<Object, Statement> existingSnapshots,
final Set<Object> unfinishedSnapshots) {
if (o == null) {
return NullLiteral.INSTANCE;
}
if (!typeToSnapshot.isAssignableFrom(o.getClass())) {
throw new IllegalArgumentException(
"Given object (of type "
+ o.getClass().getName()
+ ") is not an instance of requested type to snapshot "
+ typeToSnapshot.getName());
}
if (logger.isDebugEnabled()) {
logger.debug("** Making snapshot of " + o);
logger.debug(" Existing snapshots: " + existingSnapshots);
}
final List<MetaMethod> sortedMethods = Arrays.asList(typeToExtend.getMethods());
Collections.sort(
sortedMethods,
new Comparator<MetaMethod>() {
@Override
public int compare(MetaMethod m1, MetaMethod m2) {
return m1.getName().compareTo(m2.getName());
}
});
logger.debug(" Creating a new statement");
return new Statement() {
String generatedCache;
/**
* We retain a mapping of return values to the methods that returned them, in case we need to
* provide diagnostic information when an exception is thrown.
*/
IdentityHashMap<Object, MetaMethod> methodReturnVals =
new IdentityHashMap<Object, MetaMethod>();
@Override
public String generate(Context context) {
if (logger.isDebugEnabled()) {
logger.debug("++ Statement.generate() for " + o);
}
if (generatedCache != null) return generatedCache;
// create a subcontext and record the types we will allow the LiteralFactory to create
// automatic
// snapshots for.
final Context subContext = Context.create(context);
subContext.addLiteralizableMetaClasses(typesToRecurseOn);
final AnonymousClassStructureBuilder builder =
ObjectBuilder.newInstanceOf(typeToExtend.getErased(), context).extend();
unfinishedSnapshots.add(o);
for (MetaMethod method : sortedMethods) {
if (method.isFinal() || method.getName().equals("toString")) continue;
if (logger.isDebugEnabled()) {
logger.debug(" method " + method.getName());
logger.debug(" return type " + method.getReturnType());
}
if (methodBodyCallback != null) {
Statement providedMethod = methodBodyCallback.generateMethodBody(method, o, builder);
if (providedMethod != null) {
logger.debug(" body provided by callback");
builder
.publicOverridesMethod(method.getName(), Parameter.of(method.getParameters()))
.append(providedMethod)
.finish();
continue;
}
}
if (method.getName().equals("equals")
|| method.getName().equals("hashCode")
|| method.getName().equals("clone")
|| method.getName().equals("finalize")) {
// we skip these if not provided by the callback
if (logger.isDebugEnabled()) {
logger.debug(" skipping special-case method " + method.getName());
}
continue;
}
if (method.getParameters().length > 0) {
throw new GenerationException(
"Method "
+ method
+ " in "
+ typeToSnapshot
+ " takes parameters. Such methods must be handled by the MethodBodyCallback,"
+ " because they cannot be snapshotted.");
}
if (method.getReturnType().equals(void.class)) {
builder.publicOverridesMethod(method.getName()).finish();
if (logger.isDebugEnabled()) {
logger.debug(" finished method " + method.getName());
}
continue;
}
try {
final Object retval = typeToExtend.asClass().getMethod(method.getName()).invoke(o);
methodReturnVals.put(retval, method);
if (logger.isDebugEnabled()) {
logger.debug(" retval=" + retval);
}
Statement methodBody;
if (existingSnapshots.containsKey(retval)) {
logger.debug(" using existing snapshot");
methodBody = existingSnapshots.get(retval);
} else if (subContext.isLiteralizableClass(method.getReturnType().getErased())) {
if (unfinishedSnapshots.contains(retval)) {
throw new CyclicalObjectGraphException(unfinishedSnapshots);
}
// use Stmt.create(context) to pass the context along.
if (logger.isDebugEnabled()) {
logger.debug(" >> recursing for " + retval);
}
methodBody =
Stmt.create(subContext)
.nestedCall(
makeSnapshotAsSubclass(
retval,
method.getReturnType(),
method.getReturnType(),
methodBodyCallback,
typesToRecurseOn,
existingSnapshots,
unfinishedSnapshots))
.returnValue();
} else {
logger.debug(" relying on literal factory");
methodBody = Stmt.load(retval).returnValue();
}
if (logger.isDebugEnabled()) {
logger.debug(" finished method " + method.getName());
}
builder.publicOverridesMethod(method.getName()).append(methodBody).finish();
existingSnapshots.put(retval, methodBody);
} catch (GenerationException e) {
e.appendFailureInfo(
"In attempt to snapshot return value of "
+ typeToExtend.getFullyQualifiedName()
+ "."
+ method.getName()
+ "()");
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new GenerationException("Failed to extract value for snapshot", e);
}
}
if (logger.isDebugEnabled()) {
logger.debug(" finished: " + builder);
}
try {
generatedCache = prettyPrintJava(builder.finish().toJavaString());
} catch (NotLiteralizableException e) {
MetaMethod m = methodReturnVals.get(e.getNonLiteralizableObject());
if (m != null) {
e.appendFailureInfo(
"This value came from method "
+ m.getDeclaringClass().getFullyQualifiedNameWithTypeParms()
+ "."
+ m.getName()
+ ", which has return type "
+ m.getReturnType());
}
throw e;
} catch (GenerationException e) {
e.appendFailureInfo(
"While generating a snapshot of "
+ o.toString()
+ " (actual type: "
+ o.getClass().getName()
+ "; type to extend: "
+ typeToExtend.getFullyQualifiedName()
+ ")");
throw e;
}
unfinishedSnapshots.remove(o);
return generatedCache;
}
@Override
public MetaClass getType() {
return typeToExtend;
}
};
}
