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org.jvnet.hk2.internal.Utilities Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.jvnet.hk2.internal;
import org.aopalliance.intercept.ConstructorInterceptor;
import org.aopalliance.intercept.MethodInterceptor;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.annotation.Inherited;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.WildcardType;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Qualifier;
import javax.inject.Scope;
import javax.inject.Singleton;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.ClassAnalyzer;
import org.glassfish.hk2.api.Context;
import org.glassfish.hk2.api.ContractIndicator;
import org.glassfish.hk2.api.Descriptor;
import org.glassfish.hk2.api.DescriptorType;
import org.glassfish.hk2.api.DescriptorVisibility;
import org.glassfish.hk2.api.DynamicConfigurationListener;
import org.glassfish.hk2.api.DynamicConfigurationService;
import org.glassfish.hk2.api.ErrorService;
import org.glassfish.hk2.api.ErrorType;
import org.glassfish.hk2.api.Factory;
import org.glassfish.hk2.api.Filter;
import org.glassfish.hk2.api.HK2Loader;
import org.glassfish.hk2.api.Injectee;
import org.glassfish.hk2.api.InjectionResolver;
import org.glassfish.hk2.api.InstanceLifecycleListener;
import org.glassfish.hk2.api.InterceptionService;
import org.glassfish.hk2.api.MethodParameter;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.PerLookup;
import org.glassfish.hk2.api.Proxiable;
import org.glassfish.hk2.api.ProxyCtl;
import org.glassfish.hk2.api.ProxyForSameScope;
import org.glassfish.hk2.api.Rank;
import org.glassfish.hk2.api.Self;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.api.Unproxiable;
import org.glassfish.hk2.api.Unqualified;
import org.glassfish.hk2.api.UseProxy;
import org.glassfish.hk2.api.ValidationService;
import org.glassfish.hk2.api.Visibility;
import org.glassfish.hk2.api.messaging.SubscribeTo;
import org.glassfish.hk2.utilities.BuilderHelper;
import org.glassfish.hk2.utilities.NamedImpl;
import org.glassfish.hk2.utilities.ServiceLocatorUtilities;
import org.glassfish.hk2.utilities.reflection.ClassReflectionHelper;
import org.glassfish.hk2.utilities.reflection.Constants;
import org.glassfish.hk2.utilities.reflection.MethodWrapper;
import org.glassfish.hk2.utilities.reflection.Pretty;
import org.glassfish.hk2.utilities.reflection.ParameterizedTypeImpl;
import org.glassfish.hk2.utilities.reflection.ReflectionHelper;
import org.glassfish.hk2.utilities.reflection.ScopeInfo;
import org.glassfish.hk2.utilities.reflection.TypeChecker;
import org.jvnet.hk2.annotations.Contract;
import org.jvnet.hk2.annotations.ContractsProvided;
import org.jvnet.hk2.annotations.Optional;
import org.jvnet.hk2.annotations.Service;
/**
* This class contains a set of static utilities useful
* for implementing HK2
*
* @author jwells
*
*/
public class Utilities {
private final static String USE_SOFT_REFERENCE_PROPERTY = "org.jvnet.hk2.properties.useSoftReference";
final static boolean USE_SOFT_REFERENCE;
static {
USE_SOFT_REFERENCE = AccessController.doPrivileged(new PrivilegedAction() {
@Override
public Boolean run() {
return Boolean.parseBoolean(System.getProperty(USE_SOFT_REFERENCE_PROPERTY, "true"));
}
});
}
private final static AnnotationInformation DEFAULT_ANNOTATION_INFORMATION = new AnnotationInformation(
Collections.emptySet(),
false,
false,
null);
/**
* Returns the class analyzer with the given name
*
* @param sli The ServiceLocator to search in. May not be null
* @param analyzerName The name of the analyzer (may be null for the default analyzer)
* @param errorCollector A non-null collector of exceptions
* @return The ClassAnalyzer corresponding to the name, or null if none was found
*/
public static ClassAnalyzer getClassAnalyzer(
ServiceLocatorImpl sli,
String analyzerName,
Collector errorCollector) {
return sli.getAnalyzer(analyzerName, errorCollector);
}
/**
* Gets the constructor given the implClass and analyzer. Checks service output
*
* @param implClass The implementation class (not null)
* @param analyzer The analyzer (not null)
* @param collector A collector for errors (not null)
* @return null on failure (collector will have failures), non-null on success
*/
public static Constructor getConstructor(Class implClass, ClassAnalyzer analyzer, Collector collector) {
Constructor element = null;
try {
element = analyzer.getConstructor(implClass);
}
catch (MultiException me) {
collector.addMultiException(me);
return element;
}
catch (Throwable th) {
collector.addThrowable(th);
return element;
}
if (element == null) {
collector.addThrowable(new AssertionError("null return from getConstructor method of analyzer " +
analyzer + " for class " + implClass.getName()));
return element;
}
final Constructor result = element;
AccessController.doPrivileged(new PrivilegedAction(){
@Override
public Object run() {
result.setAccessible(true);
return null;
}
});
return element;
}
/**
* Gets the initializer methods from the given class and analyzer. Checks service output
*
* @param implClass the non-null impl class
* @param analyzer the non-null analyzer
* @param collector for gathering errors
* @return a non-null set (even in error cases, check the collector)
*/
public static Set getInitMethods(Class implClass, ClassAnalyzer analyzer, Collector collector) {
Set retVal;
try {
retVal = analyzer.getInitializerMethods(implClass);
}
catch (MultiException me) {
collector.addMultiException(me);
return Collections.emptySet();
}
catch (Throwable th) {
collector.addThrowable(th);
return Collections.emptySet();
}
if (retVal == null) {
collector.addThrowable(new AssertionError("null return from getInitializerMethods method of analyzer " +
analyzer + " for class " + implClass.getName()));
return Collections.emptySet();
}
return retVal;
}
/**
* Gets the initializer fields from the given class and analyzer. Checks service output
*
* @param implClass the non-null impl class
* @param analyzer the non-null analyzer
* @param collector for gathering errors
* @return a non-null set (even in error cases, check the collector)
*/
public static Set getInitFields(Class implClass, ClassAnalyzer analyzer, Collector collector) {
Set retVal;
try {
retVal = analyzer.getFields(implClass);
}
catch (MultiException me) {
collector.addMultiException(me);
return Collections.emptySet();
}
catch (Throwable th) {
collector.addThrowable(th);
return Collections.emptySet();
}
if (retVal == null) {
collector.addThrowable(new AssertionError("null return from getFields method of analyzer " +
analyzer + " for class " + implClass.getName()));
return Collections.emptySet();
}
return retVal;
}
/**
* Gets the post construct from the analyzer, checking output
*
* @param implClass The non-null implementation class
* @param analyzer The non-null analyzer
* @param collector The non-null error collector
* @return The possibly null post-construct method (check the collector for errors)
*/
public static Method getPostConstruct(Class implClass, ClassAnalyzer analyzer, Collector collector) {
try {
return analyzer.getPostConstructMethod(implClass);
}
catch (MultiException me) {
collector.addMultiException(me);
return null;
}
catch (Throwable th) {
collector.addThrowable(th);
return null;
}
}
/**
* Gets the preDestroy from the analyzer, checking output
*
* @param implClass The non-null implementation class
* @param analyzer The non-null analyzer
* @param collector The non-null error collector
* @return The possibly null pre-destroy method (check the collector for errors)
*/
public static Method getPreDestroy(Class implClass, ClassAnalyzer analyzer, Collector collector) {
try {
return analyzer.getPreDestroyMethod(implClass);
}
catch (MultiException me) {
collector.addMultiException(me);
return null;
}
catch (Throwable th) {
collector.addThrowable(th);
return null;
}
}
/**
* This utility will return the proper implementation class, taking into account that the
* descriptor may be a factory
*
* @param descriptor The descriptor (reified and not null) that will be used to find the
* implementation
*
* @return The real implementation class
*/
public static Class getFactoryAwareImplementationClass(ActiveDescriptor descriptor) {
if (descriptor.getDescriptorType().equals(DescriptorType.CLASS)) {
return descriptor.getImplementationClass();
}
return getFactoryProductionClass(descriptor);
}
/**
* Checks that the incoming lookup type is not improper in some way
*
* @param checkMe class to check
*/
public static void checkLookupType(Class checkMe) {
if (!checkMe.isAnnotation()) return;
// If it is in annotation we need to ensure it is either a
// scope or a qualifier
if (checkMe.isAnnotationPresent(Scope.class)) return;
if (checkMe.isAnnotationPresent(Qualifier.class)) return;
throw new IllegalArgumentException("Lookup type " + checkMe + " must be a scope or annotation");
}
/**
* Converts the type to its java form, or returns the original
*
* @param type The type to convert
* @return The translated type or the type itself
*/
public static Class translatePrimitiveType(Class type) {
Class translation = Constants.PRIMITIVE_MAP.get(type);
if (translation == null) return type;
return translation;
}
/**
* Calls the list of error services for the list of errors
*
* @param results the results
* @param callThese the services to call
*/
public static void handleErrors(NarrowResults results, LinkedList callThese) {
Collector collector = new Collector();
for (ErrorResults errorResult : results.getErrors()) {
for (ErrorService eService : callThese) {
try {
eService.onFailure(new ErrorInformationImpl(
ErrorType.FAILURE_TO_REIFY,
errorResult.getDescriptor(),
errorResult.getInjectee(),
errorResult.getMe()));
} catch (MultiException me) {
for (Throwable th : me.getErrors()) {
collector.addThrowable(th);
}
} catch (Throwable th) {
collector.addThrowable(th);
}
}
}
collector.throwIfErrors();
}
/**
* Loads the class using the loader from the given descriptor or the
* classloader of the utilities class otherwise
*
* @param loadMe The fully qualified class name
* @param fromMe The descriptor to use for the loader
* @param collector The error collector to fill in if this returns null
* @return null on failure to load (the failure will be added to the collector)
*/
public static Class loadClass(String loadMe, Descriptor fromMe, Collector collector) {
HK2Loader loader = fromMe.getLoader();
if (loader == null) {
ClassLoader cl = Utilities.class.getClassLoader();
if (cl == null) {
cl = ClassLoader.getSystemClassLoader();
}
try {
return cl.loadClass(loadMe);
} catch (Throwable th) {
collector.addThrowable(th);
return null;
}
}
try {
return loader.loadClass(loadMe);
} catch (Throwable th) {
if (th instanceof MultiException) {
MultiException me = (MultiException) th;
for (Throwable th2 : me.getErrors()) {
collector.addThrowable(th2);
}
} else {
collector.addThrowable(th);
}
return null;
}
}
/**
* Load the given class for the given injectee.
*
* @param implementation the impl class name string
* @param injectee the injectee
*
* @return The class represented by this implementation and injectee
*/
public static Class loadClass(String implementation, Injectee injectee) {
ClassLoader loader;
if (injectee != null) {
AnnotatedElement parent = injectee.getParent();
if (parent instanceof Constructor) {
loader = ((Constructor) parent).getDeclaringClass().getClassLoader();
} else if (parent instanceof Method) {
loader = ((Method) parent).getDeclaringClass().getClassLoader();
} else if (parent instanceof Field) {
loader = ((Field) parent).getDeclaringClass().getClassLoader();
} else {
loader = injectee.getClass().getClassLoader();
}
} else {
loader = Utilities.class.getClassLoader();
}
try {
return loader.loadClass(implementation);
} catch (Throwable th) {
ClassLoader ccl = Thread.currentThread().getContextClassLoader();
if (ccl != null) {
try {
return ccl.loadClass(implementation);
}
catch (Throwable th2) {
MultiException me = new MultiException(th);
me.addError(th2);
throw me;
}
}
throw new MultiException(th);
}
}
/**
* Will return the class of the injection resolver annotation type, or null if
* no injection resolver annotation can be found
*
* @param desc The reified descriptor to find the injection resolution on
* @return The annotation type for this injection resolver
*/
@SuppressWarnings("unchecked")
public static Class getInjectionResolverType(ActiveDescriptor desc) {
for (Type advertisedType : desc.getContractTypes()) {
Class rawClass = ReflectionHelper.getRawClass(advertisedType);
if (!InjectionResolver.class.equals(rawClass)) continue;
// Found the InjectionResolver
if (!(advertisedType instanceof ParameterizedType)) {
return null;
}
Type firstType = ReflectionHelper.getFirstTypeArgument(advertisedType);
if (!(firstType instanceof Class)) {
return null;
}
Class retVal = (Class) firstType;
if (!Annotation.class.isAssignableFrom(retVal)) {
return null;
}
return (Class) retVal;
}
return null;
}
/**
* This method returns the class associated with the type of the factory.
*
* @param descriptor The descriptor (reified and not null) that will be used to find the implementation.
* @return the CLASS version of what the factory produces. Will not be null.
* @throws MultiException if there was an error analyzing the class.
*/
private static Class getFactoryProductionClass(ActiveDescriptor descriptor) {
Class factoryClass = descriptor.getImplementationClass();
Type factoryProvidedType = getFactoryProductionType(factoryClass);
Class retVal = ReflectionHelper.getRawClass(factoryProvidedType);
if (retVal == null && descriptor.getContractTypes().size() == 1) {
// If the type was not resolved from a generic type, try to use
// contract type if only one was registered.
Type contract = descriptor.getContractTypes().iterator().next();
retVal = ReflectionHelper.getRawClass(contract);
}
if (retVal == null) {
throw new MultiException(new AssertionError("Could not find true produced type of factory "
+ factoryClass.getName()));
}
return retVal;
}
/**
* This method returns the type produced by a factory class
*
* @param factoryClass The non-null factory class. May not be null
* @return the type version of what the factory produces. Will
* not be null
* @throws MultiException if there was an error analyzing the class
*/
public static Type getFactoryProductionType(Class factoryClass) {
Set factoryTypes = ReflectionHelper.getTypeClosure(factoryClass,
Collections.singleton(Factory.class.getName()));
ParameterizedType parameterizedType = (ParameterizedType) factoryTypes.iterator().next();
Type factoryProvidedType = parameterizedType.getActualTypeArguments()[0];
return factoryProvidedType;
}
/**
* Checks to be sure the Factory class is ok
*
* @param factoryClass the class to check
* @param collector the exception collector
*/
public static void checkFactoryType(Class factoryClass, Collector collector) {
for (Type type : factoryClass.getGenericInterfaces()) {
Class rawClass = ReflectionHelper.getRawClass(type);
if (rawClass == null) continue;
if (!Factory.class.equals(rawClass)) continue;
Type firstType = ReflectionHelper.getFirstTypeArgument(type);
if (firstType instanceof WildcardType) {
// This should not be possible
collector.addThrowable(new IllegalArgumentException("The class " +
Pretty.clazz(factoryClass) + " has a Wildcard as its type"));
}
}
}
private static boolean hasContract(Class clazz) {
if (clazz == null) return false;
// We give this one for free, to speed up performance
if (clazz.isAnnotationPresent(Contract.class)) return true;
for (Annotation clazzAnnotation : clazz.getAnnotations()) {
if (clazzAnnotation.annotationType().isAnnotationPresent(ContractIndicator.class)) {
return true;
}
}
return false;
}
private static Set getAutoAdvertisedTypes(Type t) {
LinkedHashSet retVal = new LinkedHashSet();
retVal.add(t);
Class rawClass = ReflectionHelper.getRawClass(t);
if (rawClass == null) return retVal;
ContractsProvided provided = rawClass.getAnnotation(ContractsProvided.class);
if (provided != null) {
// Need to clear the retVal, since even the parent class may not be
// in the provided set
retVal.clear();
for (Class providedContract : provided.value()) {
retVal.add(providedContract);
}
return retVal;
}
Set allTypes = ReflectionHelper.getAllTypes(t);
for (Type candidate : allTypes) {
if (hasContract(ReflectionHelper.getRawClass(candidate))) {
retVal.add(candidate);
}
}
return retVal;
}
/**
* Creates a reified automatically generated descriptor
*
* @param clazz The class to create the desciptor for
* @param locator The service locator for whom we are creating this
* @return A reified active descriptor
*
* @throws MultiException if there was an error in the class
* @throws IllegalArgumentException If the class is null
* @throws IllegalStateException If the name could not be determined from the Named annotation
*/
public static AutoActiveDescriptor createAutoDescriptor(Class clazz, ServiceLocatorImpl locator)
throws MultiException, IllegalArgumentException, IllegalStateException {
if (clazz == null) throw new IllegalArgumentException();
Collector collector = new Collector();
ClazzCreator creator;
Set qualifiers;
Set contracts;
Class scope;
String name;
Boolean proxy = null;
Boolean proxyForSameScope = null;
String analyzerName;
String serviceMetadata = null;
// Qualifiers naming dance
String serviceName = null;
Service serviceAnno = clazz.getAnnotation(Service.class);
if (serviceAnno != null) {
if(!"".equals(serviceAnno.name())) {
serviceName = serviceAnno.name();
}
if (!"".equals(serviceAnno.metadata())) {
serviceMetadata = serviceAnno.metadata();
}
}
qualifiers = ReflectionHelper.getQualifierAnnotations(clazz);
name = ReflectionHelper.getNameFromAllQualifiers(qualifiers, clazz);
if (serviceName != null && name != null) {
// They must match
if (!serviceName.equals(name)) {
throw new IllegalArgumentException("The class " + clazz.getName() + " has an @Service name of " + serviceName +
" and has an @Named value of " + name +" which names do not match");
}
}
else if (name == null && serviceName != null) {
name = serviceName;
}
qualifiers = getAllQualifiers(clazz, name, collector); // Fixes the @Named qualifier if it has no value
contracts = getAutoAdvertisedTypes(clazz);
ScopeInfo scopeInfo = getScopeInfo(clazz, null, collector);
scope = scopeInfo.getAnnoType();
analyzerName = locator.getPerLocatorUtilities().getAutoAnalyzerName(clazz);
creator = new ClazzCreator(locator, clazz);
Map> metadata = new HashMap>();
if (serviceMetadata != null) {
try {
ReflectionHelper.readMetadataMap(serviceMetadata, metadata);
}
catch (IOException ioe) {
// If we can not read it, someone else may have
// a different metadata parser
metadata.clear();
ReflectionHelper.parseServiceMetadataString(serviceMetadata, metadata);
}
}
collector.throwIfErrors();
if (scopeInfo.getScope() != null) {
BuilderHelper.getMetadataValues(scopeInfo.getScope(), metadata);
}
for (Annotation qualifier : qualifiers) {
BuilderHelper.getMetadataValues(qualifier, metadata);
}
UseProxy useProxy = clazz.getAnnotation(UseProxy.class);
if (useProxy != null) {
proxy = useProxy.value();
}
ProxyForSameScope pfss = clazz.getAnnotation(ProxyForSameScope.class);
if (pfss != null) {
proxyForSameScope = pfss.value();
}
DescriptorVisibility visibility = DescriptorVisibility.NORMAL;
Visibility vi = clazz.getAnnotation(Visibility.class);
if (vi != null) {
visibility = vi.value();
}
int rank = BuilderHelper.getRank(clazz);
AutoActiveDescriptor retVal = new AutoActiveDescriptor(
clazz,
creator,
contracts,
scope,
name,
qualifiers,
visibility,
rank,
proxy,
proxyForSameScope,
analyzerName,
metadata,
DescriptorType.CLASS,
clazz);
retVal.setScopeAsAnnotation(scopeInfo.getScope());
creator.initialize(retVal, analyzerName, collector);
collector.throwIfErrors();
return retVal;
}
/**
* Creates a reified automatically generated descriptor
*
* @param parentClazz The class to create the desciptor for
* @param locator The service locator for whom we are creating this
* @return A reified active descriptor
*
* @throws MultiException if there was an error in the class
* @throws IllegalArgumentException If the class is null
* @throws IllegalStateException If the name could not be determined from the Named annotation
*/
public static AutoActiveDescriptor createAutoFactoryDescriptor(Class parentClazz, ActiveDescriptor factoryDescriptor, ServiceLocatorImpl locator)
throws MultiException, IllegalArgumentException, IllegalStateException {
if (parentClazz == null) throw new IllegalArgumentException();
Collector collector = new Collector();
Type factoryProductionType = Utilities.getFactoryProductionType(parentClazz);
Method provideMethod = Utilities.getFactoryProvideMethod(parentClazz);
if (provideMethod == null) {
collector.addThrowable(new IllegalArgumentException("Could not find the provide method on the class " + parentClazz.getName()));
// Guaranteed to throw
collector.throwIfErrors();
}
FactoryCreator creator;
Set qualifiers;
Set contracts;
Class scope;
String name;
Boolean proxy = null;
Boolean proxyForSameScope = null;
qualifiers = ReflectionHelper.getQualifierAnnotations(provideMethod);
name = ReflectionHelper.getNameFromAllQualifiers(qualifiers, provideMethod);
contracts = getAutoAdvertisedTypes(factoryProductionType);
ScopeInfo scopeInfo = getScopeInfo(provideMethod, null, collector);
scope = scopeInfo.getAnnoType();
creator = new FactoryCreator(locator, factoryDescriptor);
collector.throwIfErrors();
Map> metadata = new HashMap>();
if (scopeInfo.getScope() != null) {
BuilderHelper.getMetadataValues(scopeInfo.getScope(), metadata);
}
for (Annotation qualifier : qualifiers) {
BuilderHelper.getMetadataValues(qualifier, metadata);
}
UseProxy useProxy = provideMethod.getAnnotation(UseProxy.class);
if (useProxy != null) {
proxy = useProxy.value();
}
ProxyForSameScope pfss = provideMethod.getAnnotation(ProxyForSameScope.class);
if (pfss != null) {
proxyForSameScope = pfss.value();
}
DescriptorVisibility visibility = DescriptorVisibility.NORMAL;
Visibility vi = provideMethod.getAnnotation(Visibility.class);
if (vi != null) {
visibility = vi.value();
}
int rank = 0;
Rank ranking = provideMethod.getAnnotation(Rank.class);
if (ranking != null) {
rank = ranking.value();
}
AutoActiveDescriptor retVal = new AutoActiveDescriptor(
factoryDescriptor.getImplementationClass(),
creator,
contracts,
scope,
name,
qualifiers,
visibility,
rank,
proxy,
proxyForSameScope,
null, // provide methods do not have analyzers
metadata,
DescriptorType.PROVIDE_METHOD,
null);
retVal.setScopeAsAnnotation(scopeInfo.getScope());
collector.throwIfErrors();
return retVal;
}
/**
* Pre Destroys the given object
*
* @param preMe pre destroys the thing
* @param locator The non-null service locator associated with the operation (for finding the strategy)
* @param strategy The strategy to use for analyzing the class
*/
public static void justPreDestroy(Object preMe, ServiceLocatorImpl locator, String strategy) {
if (preMe == null) throw new IllegalArgumentException();
Collector collector = new Collector();
ClassAnalyzer analyzer = getClassAnalyzer(locator, strategy, collector);
collector.throwIfErrors();
collector.throwIfErrors();
Class baseClass = preMe.getClass();
Method preDestroy = getPreDestroy(baseClass, analyzer, collector);
collector.throwIfErrors();
if (preDestroy == null) return;
try {
ReflectionHelper.invoke(preMe, preDestroy, new Object[0], locator.getNeutralContextClassLoader());
} catch (Throwable e) {
throw new MultiException(e);
}
}
/**
* Post constructs the given object
*
* @param postMe post constructs the thing
* @param locator The non-null service locator associated with the operation (for finding the strategy)
* @param strategy The strategy to use for analyzing the class
*/
public static void justPostConstruct(Object postMe, ServiceLocatorImpl locator, String strategy) {
if (postMe == null) throw new IllegalArgumentException();
Collector collector = new Collector();
ClassAnalyzer analyzer = getClassAnalyzer(locator, strategy, collector);
collector.throwIfErrors();
Class baseClass = postMe.getClass();
Method postConstruct = getPostConstruct(baseClass, analyzer, collector);
collector.throwIfErrors();
if (postConstruct == null) return;
try {
ReflectionHelper.invoke(postMe, postConstruct, new Object[0], locator.getNeutralContextClassLoader());
} catch (Throwable e) {
throw new MultiException(e);
}
}
/**
* Just injects this one method
* @param injectMe
* @param method
* @param locator
* @param givenValues
*/
public static Object justAssistedInject(Object injectMe, Method method, ServiceLocatorImpl locator, ServiceHandle root, MethodParameter... givenValues) {
if (injectMe == null || method == null) {
throw new IllegalArgumentException("injectMe=" + injectMe + " method=" + method);
}
if (givenValues == null) givenValues = new MethodParameter[0];
int numParameters = method.getParameterTypes().length;
Map knownValues = new HashMap();
for (MethodParameter mp : givenValues) {
int index = mp.getParameterPosition();
if (knownValues.containsKey(index)) {
throw new IllegalArgumentException("The given values contain more than one value for index " + index);
}
knownValues.put(index, mp);
if ((index < 0) || (index >= numParameters)) {
throw new IllegalArgumentException("Index of " + mp + " is out of range of the method parameters " + method);
}
}
List injectees = Utilities.getMethodInjectees(injectMe.getClass(), method, null, knownValues);
Object args[] = new Object[numParameters];
for (int lcv = 0; lcv < injectees.size(); lcv++) {
SystemInjecteeImpl injectee = injectees.get(lcv);
if (injectee == null) {
MethodParameter mp = knownValues.get(lcv);
if (mp == null) {
throw new AssertionError("Error getting values " + lcv + " method=" + method + " injectMe=" + injectMe + " knownValues=" + knownValues);
}
args[lcv] = mp.getParameterValue();
}
else {
InjectionResolver resolver = locator.getPerLocatorUtilities().getInjectionResolver(locator, injectee);
args[lcv] = resolver.resolve(injectee, root);
}
}
try {
return ReflectionHelper.invoke(injectMe, method, args, locator.getNeutralContextClassLoader());
}
catch (MultiException me) {
throw me;
}
catch (Throwable e) {
throw new MultiException(e);
}
}
/**
* Just injects the thing, doesn't try to do anything else
* @param injectMe The object to inject into
* @param locator The locator to find the injection points with
* @param strategy The strategy to use for analyzing the class
*/
public static void justInject(Object injectMe, ServiceLocatorImpl locator, String strategy) {
if (injectMe == null) throw new IllegalArgumentException();
Collector collector = new Collector();
ClassAnalyzer analyzer = getClassAnalyzer(locator, strategy, collector);
collector.throwIfErrors();
Class baseClass = injectMe.getClass();
Set fields = Utilities.getInitFields(baseClass, analyzer, collector);
Set methods = Utilities.getInitMethods(baseClass, analyzer, collector);
collector.throwIfErrors();
for (Field field : fields) {
InjectionResolver resolver = locator.getPerLocatorUtilities().getInjectionResolver(locator, field);
List injecteeFields = Utilities.getFieldInjectees(baseClass, field, null);
validateSelfInjectees(null, injecteeFields, collector);
collector.throwIfErrors();
Injectee injectee = injecteeFields.get(0);
Object fieldValue = resolver.resolve(injectee, null);
try {
ReflectionHelper.setField(field, injectMe, fieldValue);
}
catch (MultiException me) {
throw me;
}
catch (Throwable th) {
throw new MultiException(th);
}
}
for (Method method : methods) {
List injectees = Utilities.getMethodInjectees(baseClass, method, null);
validateSelfInjectees(null, injectees, collector);
collector.throwIfErrors();
Object args[] = new Object[injectees.size()];
for (SystemInjecteeImpl injectee : injectees) {
InjectionResolver resolver = locator.getPerLocatorUtilities().getInjectionResolver(locator, injectee);
args[injectee.getPosition()] = resolver.resolve(injectee, null);
}
try {
ReflectionHelper.invoke(injectMe, method, args, locator.getNeutralContextClassLoader());
}
catch (MultiException me) {
throw me;
}
catch (Throwable e) {
throw new MultiException(e);
}
}
}
/**
* Just creates the thing, doesn't try to do anything else
* @param createMe The thing to create
* @param locator The locator to find the injection points with
* @param strategy The strategy to use for analyzing the class
* @return The constructed thing, no further injection is performed
*/
@SuppressWarnings("unchecked")
public static T justCreate(Class createMe, ServiceLocatorImpl locator, String strategy) {
if (createMe == null) throw new IllegalArgumentException();
Collector collector = new Collector();
ClassAnalyzer analyzer = getClassAnalyzer(locator, strategy, collector);
collector.throwIfErrors();
Constructor c = getConstructor(createMe, analyzer, collector);
collector.throwIfErrors();
List injectees = getConstructorInjectees(c, null);
validateSelfInjectees(null, injectees, collector);
collector.throwIfErrors();
Object args[] = new Object[injectees.size()];
for (SystemInjecteeImpl injectee : injectees) {
InjectionResolver resolver = locator.getPerLocatorUtilities().getInjectionResolver(locator, injectee);
args[injectee.getPosition()] = resolver.resolve(injectee, null);
}
try {
return (T) ReflectionHelper.makeMe(c, args, locator.getNeutralContextClassLoader());
} catch (Throwable th) {
throw new MultiException(th);
}
}
/**
* Returns all the interfaces the proxy must implement
* @param contracts All of the advertised contracts
* @return The array of contracts to add to the proxy
*/
public static Class[] getInterfacesForProxy(Set contracts) {
LinkedList> retVal = new LinkedList>();
retVal.add(ProxyCtl.class); // Every proxy implements this interface
for (Type type : contracts) {
Class rawClass = ReflectionHelper.getRawClass(type);
if (rawClass == null) continue;
if (!rawClass.isInterface()) continue;
retVal.add(rawClass);
}
return retVal.toArray(new Class[retVal.size()]);
}
/**
* Returns true if this scope is proxiable
*
* @param scope The scope annotation to test
* @return true if this must be proxied
*/
public static boolean isProxiableScope(Class scope) {
return scope.isAnnotationPresent(Proxiable.class);
}
/**
* Returns true if this scope is unproxiable
*
* @param scope The scope annotation to test
* @return true if this must be proxied
*/
public static boolean isUnproxiableScope(Class scope) {
if (scope.isAnnotationPresent(Unproxiable.class)) return true;
return false;
}
/**
* This method determines whether or not the descriptor should be proxied.
* The given descriptor must be reified and valid.
*
* @param desc A non-null, reified ActiveDescriptor
* @param injectee The injectee where this is being injected if known,
* or null if not known
* @return true if this descriptor must be proxied, false otherwise
*/
private static boolean isProxiable(ActiveDescriptor desc, Injectee injectee) {
Boolean directed = desc.isProxiable();
if (directed != null) {
if (injectee == null) {
// No other scope to compare to
return directed;
}
if (!directed) {
// Doesn't matter what the other scope is, not proxied
return false;
}
ActiveDescriptor injecteeDescriptor = injectee.getInjecteeDescriptor();
if (injecteeDescriptor == null) {
// No other scope to compare to
return true;
}
Boolean sameScope = desc.isProxyForSameScope();
if (sameScope == null || sameScope) {
// The default case is to be lazy
return true;
}
// OK, same scope is false, forced Proxy is true,
// now we need to see if the scopes of the two
// things are in fact the same
if (desc.getScope().equals(injecteeDescriptor.getScope())) {
// The scopes are the same, proxy-for-same-scope is false,
// so the answer is no, do not proxy
return false;
}
// The scopes are different, deal with it
return true;
}
final Class scopeAnnotation = desc.getScopeAnnotation();
if (!scopeAnnotation.isAnnotationPresent(Proxiable.class)) return false;
if (injectee == null) {
// No other scope to compare to
return true;
}
ActiveDescriptor injecteeDescriptor = injectee.getInjecteeDescriptor();
if (injecteeDescriptor == null) {
// No other scope to compare to
return true;
}
Proxiable proxiable = scopeAnnotation.getAnnotation(Proxiable.class);
Boolean proxyForSameScope = desc.isProxyForSameScope();
if (proxyForSameScope != null) {
if (proxyForSameScope) {
return true;
}
}
else if (proxiable == null || proxiable.proxyForSameScope()) {
// The default case is to be lazy
return true;
}
// OK, same scope is false, and we are in Proxiable scope,
// now we need to see if the scopes of the two
// things are in fact the same
if (desc.getScope().equals(injecteeDescriptor.getScope())) {
// The scopes are the same, proxy-for-same-scope is false,
// so the answer is no, do not proxy
return false;
}
// The scopes are different, deal with it
return true;
}
/**
* Returns the first thing found in the set
*
* @param set The set from which to get the first element
* @return the first thing found in the set
*/
public static T getFirstThingInList(List set) {
for (T t : set) {
return t;
}
return null;
}
/**
* Returns a constant ActiveDescriptor for the basic ServiceLocator
*
* @param locator The service locator to get the ActiveDescriptor for
* @return An active descriptor specifically for the ServiceLocator
*/
public static ActiveDescriptor getLocatorDescriptor(ServiceLocator locator) {
HashSet contracts = new HashSet();
contracts.add(ServiceLocator.class);
Set qualifiers = Collections.emptySet();
ActiveDescriptor retVal =
new ConstantActiveDescriptor(
locator,
contracts,
PerLookup.class,
null,
qualifiers,
DescriptorVisibility.LOCAL,
0,
null,
null,
null,
locator.getLocatorId(),
null);
return retVal;
}
/**
* Creates a Three Thirty constant active descriptor
*
* @param locator The service locator to get the ActiveDescriptor for
* @return An active descriptor specifically for the ServiceLocator
*/
public static ActiveDescriptor> getThreeThirtyDescriptor(
ServiceLocatorImpl locator) {
ThreeThirtyResolver threeThirtyResolver = new ThreeThirtyResolver(locator);
HashSet contracts = new HashSet();
Type actuals[] = new Type[1];
actuals[0] = Inject.class;
contracts.add(new ParameterizedTypeImpl(InjectionResolver.class, actuals));
Set qualifiers = new HashSet();
qualifiers.add(new NamedImpl(InjectionResolver.SYSTEM_RESOLVER_NAME));
ActiveDescriptor> retVal =
new ConstantActiveDescriptor>(
threeThirtyResolver,
contracts,
Singleton.class,
InjectionResolver.SYSTEM_RESOLVER_NAME,
qualifiers,
DescriptorVisibility.LOCAL,
0,
null,
null,
null,
locator.getLocatorId(),
null);
return retVal;
}
/**
* Validates the constructors of the annotated type and returns the
* producer for the annotatedType (if there is no valid producer
* constructor then this method returns null)
*
* @param annotatedType The type to find the producer constructor
* @param locator The service locator to use when analyzing constructors
* @param collector The error collector
* @return The producer constructor or null if the type has no valid
* producer constructor
*/
public static Constructor findProducerConstructor(Class annotatedType, ServiceLocatorImpl locator, Collector collector) {
Constructor zeroArgConstructor = null;
Constructor aConstructorWithInjectAnnotation = null;
Set> allConstructors = getAllConstructors(annotatedType);
for (Constructor constructor : allConstructors) {
Type rawParameters[] = constructor.getGenericParameterTypes();
if (rawParameters.length <= 0) {
zeroArgConstructor = constructor;
}
if (locator.hasInjectAnnotation(constructor)) {
if (aConstructorWithInjectAnnotation != null) {
collector.addThrowable(new IllegalArgumentException("There is more than one constructor on class " +
Pretty.clazz(annotatedType)));
return null;
}
aConstructorWithInjectAnnotation = constructor;
}
if (!isProperConstructor(constructor)) {
collector.addThrowable(new IllegalArgumentException("The constructor for " +
Pretty.clazz(annotatedType) + " may not have an annotation as a parameter"));
return null;
}
}
if (aConstructorWithInjectAnnotation != null) {
return aConstructorWithInjectAnnotation;
}
if (zeroArgConstructor == null) {
collector.addThrowable(new NoSuchMethodException("The class " + Pretty.clazz(annotatedType) +
" has no constructor marked @Inject and no zero argument constructor"));
return null;
}
return zeroArgConstructor;
}
private static boolean isProperConstructor(Constructor c) {
for (Class pClazz : c.getParameterTypes()) {
if (pClazz.isAnnotation()) return false;
}
return true;
}
/**
* Gets all the constructors for a given class
*
* @param clazz The class to find the constructors of
* @return A set of Constructors for the given class
*/
private static Set> getAllConstructors(final Class clazz) {
HashSet> retVal = new LinkedHashSet>();
Constructor constructors[] = AccessController.doPrivileged(new PrivilegedAction[]>() {
@Override
public Constructor[] run() {
return clazz.getDeclaredConstructors();
}
});
for (Constructor constructor : constructors) {
retVal.add(constructor);
}
return retVal;
}
private static boolean hasSubscribeToAnnotation(Method method) {
Annotation paramAnnotations[][] = method.getParameterAnnotations();
for (int outer = 0; outer < paramAnnotations.length; outer++) {
Annotation paramAnnos[] = paramAnnotations[outer];
for (int inner = 0; inner < paramAnnos.length; inner++) {
if (SubscribeTo.class.equals(paramAnnos[inner].annotationType())) {
return true;
}
}
}
return false;
}
/**
* Get all the initializer methods of the annotatedType. If there are definitional
* errors they will be put into the errorCollector (so as to get all the errors
* at one shot)
*
* @param annotatedType The type to find the errors in
* @param locator The locator to use when analyzing methods
* @param errorCollector The collector to add errors to
* @return A possibly empty but never null set of initializer methods
*/
public static Set findInitializerMethods(
Class annotatedType,
ServiceLocatorImpl locator,
Collector errorCollector) {
LinkedHashSet retVal = new LinkedHashSet();
ClassReflectionHelper crh = locator.getClassReflectionHelper();
for (MethodWrapper methodWrapper : crh.getAllMethods(annotatedType)) {
Method method = methodWrapper.getMethod();
if (!locator.hasInjectAnnotation(method) ||
method.isSynthetic() ||
method.isBridge()) {
// Not an initializer method
continue;
}
if (hasSubscribeToAnnotation(method)) {
// Has an @SubscribeTo annotation, this is for an event not an initializer
continue;
}
if (!isProperMethod(method)) {
errorCollector.addThrowable(new IllegalArgumentException(
"An initializer method " + Pretty.method(method) +
" is static, abstract or has a parameter that is an annotation"));
continue;
}
retVal.add(method);
}
return retVal;
}
/**
* Finds the post construct method on this class
* @param clazz The class to search for the post construct
* @param collector An error collector
* @return The post construct method or null
*/
public static Method findPostConstruct(Class clazz, ServiceLocatorImpl locator, Collector collector) {
try {
return locator.getClassReflectionHelper().findPostConstruct(clazz, org.glassfish.hk2.api.PostConstruct.class);
}
catch (IllegalArgumentException iae) {
collector.addThrowable(iae);
return null;
}
}
/**
* Finds the pre destroy method on this class
* @param clazz The class to search for the pre destroy method
* @param collector An error collector
* @return The pre destroy method or null
*/
public static Method findPreDestroy(Class clazz, ServiceLocatorImpl locator, Collector collector) {
try {
return locator.getClassReflectionHelper().findPreDestroy(clazz, org.glassfish.hk2.api.PreDestroy.class);
}
catch (IllegalArgumentException iae) {
collector.addThrowable(iae);
return null;
}
}
/**
* Will find all the initialize fields in the class
*
* @param annotatedType The class to search for fields
* @param locator The locator to use when analyzing the class
* @param errorCollector The error collector
* @return A non-null but possibly empty set of initializer fields
*/
public static Set findInitializerFields(Class annotatedType,
ServiceLocatorImpl locator,
Collector errorCollector) {
LinkedHashSet retVal = new LinkedHashSet();
ClassReflectionHelper crh = locator.getClassReflectionHelper();
Set fields = crh.getAllFields(annotatedType);
for (Field field : fields) {
if (!locator.hasInjectAnnotation(field)) {
// Not an initializer field
continue;
}
if (!isProperField(field)) {
errorCollector.addThrowable(new IllegalArgumentException("The field " +
Pretty.field(field) + " may not be static, final or have an Annotation type"));
continue;
}
retVal.add(field);
}
return retVal;
}
/**
* Represents a cache miss, and will fetch all of the information needed about the
* AnnotatedElement in order to quickly determine what its resolver would be
*
* @param annotatedElement The raw annotated element that can be used to
* calculate the information needed to determine the resolver
* @return An annotated element constructed from the information in the annotatedElement
*/
static AnnotatedElementAnnotationInfo computeAEAI(AnnotatedElement annotatedElement) {
if (annotatedElement instanceof Method) {
final Method m = (Method) annotatedElement;
return new AnnotatedElementAnnotationInfo(m.getAnnotations(), true, m.getParameterAnnotations(), false);
} else if (annotatedElement instanceof Constructor) {
final Constructor c = (Constructor) annotatedElement;
return new AnnotatedElementAnnotationInfo(c.getAnnotations(), true, c.getParameterAnnotations(), true);
} else {
return new AnnotatedElementAnnotationInfo(annotatedElement.getAnnotations(), false, new Annotation[0][], false);
}
}
private static boolean isProperMethod(Method member) {
if (ReflectionHelper.isStatic(member)) return false;
if (isAbstract(member)) return false;
for (Class paramClazz : member.getParameterTypes()) {
if (paramClazz.isAnnotation()) {
return false;
}
}
return true;
}
private static boolean isProperField(Field field) {
if (ReflectionHelper.isStatic(field)) return false;
if (isFinal(field)) return false;
Class type = field.getType();
return !type.isAnnotation();
}
/**
* Returns true if the underlying member is abstract
*
* @param member The non-null member to test
* @return true if the member is abstract
*/
public static boolean isAbstract(Member member) {
int modifiers = member.getModifiers();
return ((modifiers & Modifier.ABSTRACT) != 0);
}
/**
* Returns true if the underlying member is abstract
*
* @param member The non-null member to test
* @return true if the member is abstract
*/
public static boolean isFinal(Member member) {
int modifiers = member.getModifiers();
return ((modifiers & Modifier.FINAL) != 0);
}
private static boolean isFinal(Class clazz) {
int modifiers = clazz.getModifiers();
return ((modifiers & Modifier.FINAL) != 0);
}
@SuppressWarnings("unchecked")
private static ScopeInfo getScopeInfo(
AnnotatedElement annotatedGuy,
Descriptor defaultScope,
Collector collector) {
AnnotatedElement topLevelElement = annotatedGuy;
Annotation winnerScope = null;
while (annotatedGuy != null) {
Annotation current = internalGetScopeAnnotationType(
annotatedGuy,
collector);
if (current != null) {
if (annotatedGuy.equals(topLevelElement)) {
// We found a winner, no matter the inherited state
winnerScope = current;
break;
}
if (current.annotationType().isAnnotationPresent(Inherited.class)) {
winnerScope = current;
break;
}
// This non-inherited annotation wipes out all scopes above it
break;
}
if (annotatedGuy instanceof Class) {
annotatedGuy = ((Class) annotatedGuy).getSuperclass();
} else {
Method theMethod = (Method) annotatedGuy;
Class methodClass = theMethod.getDeclaringClass();
annotatedGuy = null;
Class methodSuperclass = methodClass.getSuperclass();
while (methodSuperclass != null) {
if (Factory.class.isAssignableFrom(methodSuperclass)) {
annotatedGuy = getFactoryProvideMethod(methodSuperclass);
break;
}
methodSuperclass = methodSuperclass.getSuperclass();
}
}
}
if (winnerScope != null) {
return new ScopeInfo(winnerScope, winnerScope.annotationType());
}
if (topLevelElement.isAnnotationPresent(Service.class)) {
return new ScopeInfo(ServiceLocatorUtilities.getSingletonAnnotation(), Singleton.class);
}
if (defaultScope != null && defaultScope.getScope() != null) {
Class descScope = (Class)
loadClass(defaultScope.getScope(), defaultScope, collector);
if (descScope != null) {
return new ScopeInfo(null, descScope);
}
}
return new ScopeInfo(ServiceLocatorUtilities.getPerLookupAnnotation(), PerLookup.class);
}
/**
* Returns the scope of this thing
*
* @param fromThis The annotated class or producer method
* @param defaultScope The default scope if none other can be found
* @return The scope of this class or producer method. If no scope is
* found will return the dependent scope
*/
public static Class getScopeAnnotationType(
Class fromThis,
Descriptor defaultScope) {
Collector collector = new Collector();
ScopeInfo si = getScopeInfo(fromThis, defaultScope, collector);
collector.throwIfErrors();
return si.getAnnoType();
}
/**
* Returns the scope of this thing
*
* @param annotatedGuy The annotated class or producer method
* @param defaultScope The default scope if none other can be found
* @param collector The error collector
* @return The scope of this class or producer method. If no scope is
* found will return the dependent scope
*/
public static ScopeInfo getScopeAnnotationType(
AnnotatedElement annotatedGuy,
Descriptor defaultScope,
Collector collector) {
ScopeInfo si = getScopeInfo(annotatedGuy, defaultScope, collector);
return si;
}
/**
* This returns the scope annotation on this class *itself*, and no other
* classes (like, not subclasses).
*/
private static Annotation internalGetScopeAnnotationType(
AnnotatedElement annotatedGuy,
Collector collector) {
boolean epicFail = false;
Annotation retVal = null;
for (Annotation annotation : annotatedGuy.getDeclaredAnnotations()) {
if (annotation.annotationType().isAnnotationPresent(Scope.class)) {
if (retVal != null) {
collector.addThrowable(new IllegalArgumentException("The type " + annotatedGuy +
" may not have more than one scope. It has at least " +
Pretty.clazz(retVal.annotationType()) +
" and " + Pretty.clazz(annotation.annotationType())));
epicFail = true;
continue;
}
retVal = annotation;
}
}
if (epicFail) return null;
return retVal;
}
private final static String PROVIDE_METHOD = "provide";
/**
* This method will retrieve the provide method from a Factory
*
* @param clazz This class must implement factory
* @return The provide method from this class
*/
public static Method getFactoryProvideMethod(Class clazz) {
try {
return clazz.getMethod(PROVIDE_METHOD);
} catch (NoSuchMethodException e) {
return null;
}
}
/**
* Returns the default name if one can be found. Will only work on
* classes and methods
*
* @param parent The parent annotated element
* @param collector For errors
* @return null if there is no default name (no Named)
*/
public static String getDefaultNameFromMethod(Method parent, Collector collector) {
Named named = parent.getAnnotation(Named.class);
if (named == null) {
return null;
}
if (named.value() == null || named.value().equals("")) {
collector.addThrowable(new IllegalArgumentException(
"@Named on the provide method of a factory must have an explicit value"));
}
return named.value();
}
/**
* Returns the full set of qualifier annotations on this class
*
* @param annotatedGuy The element we are searching for qualifiers
* @param name The name this element must have
* @param collector The error collector
* @return A non-null but possibly empty set of qualifiers
*/
public static Set getAllQualifiers(
AnnotatedElement annotatedGuy,
String name,
Collector collector) {
Named namedQualifier = null;
Set retVal = ReflectionHelper.getQualifierAnnotations(annotatedGuy);
for (Annotation anno : retVal) {
if (anno instanceof Named) {
namedQualifier = (Named) anno;
break;
}
}
if (name == null) {
if (namedQualifier != null) {
collector.addThrowable(new IllegalArgumentException("No name was in the descriptor, but this element(" +
annotatedGuy + " has a Named annotation with value: " + namedQualifier.value()));
retVal.remove(namedQualifier);
}
return retVal;
}
if (namedQualifier == null || namedQualifier.value().equals("")) {
if (namedQualifier != null) {
retVal.remove(namedQualifier);
}
namedQualifier = new NamedImpl(name);
retVal.add(namedQualifier);
}
if (!name.equals(namedQualifier.value())) {
collector.addThrowable(new IllegalArgumentException("The class had an @Named qualifier that was inconsistent." +
" The expected name is " + name +
" but the annotation has name " + namedQualifier.value()));
}
return retVal;
}
private static AnnotationInformation getParamInformation(Annotation memberAnnotations[]) {
boolean useDefault = true;
Set qualifiers = null;
boolean optional = false;
boolean self = false;
Unqualified unqualified = null;
for (Annotation anno : memberAnnotations) {
if (ReflectionHelper.isAnnotationAQualifier(anno)) {
if (qualifiers == null) qualifiers = new HashSet();
qualifiers.add(anno);
useDefault = false;
}
else if (Optional.class.equals(anno.annotationType())) {
optional = true;
useDefault = false;
}
else if (Self.class.equals(anno.annotationType())) {
self = true;
useDefault = false;
}
else if (Unqualified.class.equals(anno.annotationType())) {
unqualified = (Unqualified) anno;
useDefault = false;
}
}
if (useDefault) return DEFAULT_ANNOTATION_INFORMATION;
if (qualifiers == null) qualifiers = DEFAULT_ANNOTATION_INFORMATION.qualifiers;
return new AnnotationInformation(
qualifiers,
optional,
self,
unqualified);
}
/**
* Returns all the injectees for a constructor
* @param c The constructor to analyze
* @param injecteeDescriptor The descriptor of the injectee
* @return the list (in order) of parameters to the constructor
*/
public static List getConstructorInjectees(Constructor c, ActiveDescriptor injecteeDescriptor) {
Type genericTypeParams[] = c.getGenericParameterTypes();
Annotation paramAnnotations[][] = c.getParameterAnnotations();
List retVal = new LinkedList();
for (int lcv = 0; lcv < genericTypeParams.length; lcv++) {
AnnotationInformation ai = getParamInformation(paramAnnotations[lcv]);
retVal.add(new SystemInjecteeImpl(genericTypeParams[lcv],
ai.qualifiers,
lcv,
c,
ai.optional,
ai.self,
ai.unqualified,
injecteeDescriptor));
}
return retVal;
}
/**
* Returns all the injectees for a constructor
* @param c The constructor to analyze
* @param injecteeDescriptor The descriptor of the injectee
* @return the list (in order) of parameters to the constructor
*/
public static List getMethodInjectees(Class actualClass, Method c, ActiveDescriptor injecteeDescriptor) {
return getMethodInjectees(actualClass, c, injecteeDescriptor, Collections.emptyMap());
}
/**
* Returns all the injectees for a constructor
* @param c The constructor to analyze
* @param injecteeDescriptor The descriptor of the injectee
* @return the list (in order) of parameters to the constructor
*/
public static List getMethodInjectees(Class actualClass, Method c, ActiveDescriptor injecteeDescriptor,
Map knownValues) {
Type genericTypeParams[] = c.getGenericParameterTypes();
Annotation paramAnnotations[][] = c.getParameterAnnotations();
List retVal = new ArrayList();
Class declaringClass = c.getDeclaringClass();
for (int lcv = 0; lcv < genericTypeParams.length; lcv++) {
if (knownValues.containsKey(lcv)) {
retVal.add(null);
continue;
}
AnnotationInformation ai = getParamInformation(paramAnnotations[lcv]);
Type adjustedType = ReflectionHelper.resolveMember(actualClass,
genericTypeParams[lcv], declaringClass);
retVal.add(new SystemInjecteeImpl(adjustedType,
ai.qualifiers,
lcv,
c,
ai.optional,
ai.self,
ai.unqualified,
injecteeDescriptor));
}
return retVal;
}
private static Set getFieldAdjustedQualifierAnnotations(Field f, Set qualifiers) {
Named n = f.getAnnotation(Named.class);
if (n == null) return qualifiers;
if (n.value() != null && !"".equals(n.value())) {
return qualifiers;
}
HashSet retVal = new HashSet();
for (Annotation qualifier : qualifiers) {
if (qualifier.annotationType().equals(Named.class)) {
retVal.add(new NamedImpl(f.getName()));
}
else {
retVal.add(qualifier);
}
}
return retVal;
}
/**
* Returns the injectees for a field
* @param f The field to analyze
* @param injecteeDescriptor The descriptor of the injectee
* @return the list (in order) of parameters to the constructor
*/
public static List getFieldInjectees(Class actualClass, Field f, ActiveDescriptor injecteeDescriptor) {
List retVal = new LinkedList();
AnnotationInformation ai = getParamInformation(f.getAnnotations());
Type adjustedType = ReflectionHelper.resolveField(actualClass, f);
retVal.add(new SystemInjecteeImpl(adjustedType,
getFieldAdjustedQualifierAnnotations(f, ai.qualifiers),
-1,
f,
ai.optional,
ai.self,
ai.unqualified,
injecteeDescriptor));
return retVal;
}
/**
* This method validates a list of injectees to ensure that any self injectees have
* the proper set of requirements. It adds IllegalArgumentExceptions to the collector
* if it finds errors
*
* @param givenDescriptor The descriptor associated with this injectee, or null if there are none
* @param injectees The list of injectees to check. Only self injectees are validates
* @param collector The collector to add any errors to
*/
public static void validateSelfInjectees(ActiveDescriptor givenDescriptor,
List injectees,
Collector collector) {
for (Injectee injectee : injectees) {
if (!injectee.isSelf()) continue;
Class requiredRawClass = ReflectionHelper.getRawClass(injectee.getRequiredType());
if (requiredRawClass == null || !(ActiveDescriptor.class.equals(requiredRawClass))) {
collector.addThrowable(new IllegalArgumentException("Injection point " + injectee +
" does not have the required type of ActiveDescriptor"));
}
if (injectee.isOptional()) {
collector.addThrowable(new IllegalArgumentException("Injection point " + injectee +
" is marked both @Optional and @Self"));
}
if (!injectee.getRequiredQualifiers().isEmpty()) {
collector.addThrowable(new IllegalArgumentException("Injection point " + injectee +
" is marked @Self but has other qualifiers"));
}
if (givenDescriptor == null) {
collector.addThrowable(new IllegalArgumentException("A class with injection point " + injectee +
" is being created or injected via the non-managed ServiceLocator API"));
}
}
}
/**
* This method returns a set of qualifiers from an array of qualifiers.
*
* TODO It can also do some sanity checking here (i.e., multiple
* qualifiers of the same type, that sort of thing)
*
* @param qualifiers The qualifiers to convert. May not be null, but
* may be zero length
* @param name The name this set of qualifiers must have
* @return The set containing all the qualifiers
*/
public static Set fixAndCheckQualifiers(Annotation qualifiers[], String name) {
Set retVal = new HashSet();
Set dupChecker = new HashSet();
Named named = null;
for (Annotation qualifier : qualifiers) {
String annotationType = qualifier.annotationType().getName();
if (dupChecker.contains(annotationType)) {
throw new IllegalArgumentException(annotationType + " appears more than once in the qualifier list");
}
dupChecker.add(annotationType);
retVal.add(qualifier);
if (qualifier instanceof Named) {
named = (Named) qualifier;
if (named.value().equals("")) {
throw new IllegalArgumentException("The @Named qualifier must have a value");
}
if (name != null && !name.equals(named.value())) {
throw new IllegalArgumentException("The name passed to the method (" +
name + ") does not match the value of the @Named qualifier (" + named.value() + ")");
}
}
}
if (named == null && name != null) {
retVal.add(new NamedImpl(name));
}
return retVal;
}
/**
* Creates the service (without the need for an intermediate ServiceHandle
* to be created)
*
* @param root The ultimate parent of this operation
* @param injectee the injectee we are creating this service for
* @param locator The locator to use to find services
* @param handle The ServiceHandle (or null if there is none)
* @param requestedClass The class for the service we are looking for
* @return The created service
*/
@SuppressWarnings("unchecked")
public static T createService(ActiveDescriptor root,
Injectee injectee,
ServiceLocatorImpl locator,
ServiceHandle handle,
Class requestedClass) {
if (root == null) throw new IllegalArgumentException();
T service = null;
if (!root.isReified()) {
root = (ActiveDescriptor) locator.reifyDescriptor(root, injectee);
}
if (isProxiable(root, injectee)) {
if (!proxiesAvailable()) {
throw new IllegalStateException("A descriptor " + root + " requires a proxy, but the proxyable library is not on the classpath");
}
return locator.getPerLocatorUtilities().getProxyUtilities().generateProxy(requestedClass,
locator, root, (ServiceHandleImpl) handle, injectee);
}
Context context;
try {
context = locator.resolveContext(root.getScopeAnnotation());
}
catch (Throwable th) {
if (injectee != null && injectee.isOptional()) return null;
Exception addMe = new IllegalStateException("While attempting to create a service for " + root +
" in scope " + root.getScope() + " an error occured while locating the context");
if (th instanceof MultiException) {
MultiException me = (MultiException) th;
me.addError(addMe);
throw me;
}
MultiException me = new MultiException(th);
me.addError(addMe);
throw me;
}
try {
service = context.findOrCreate(root, handle);
}
catch (MultiException me) {
throw me;
}
catch (Throwable th) {
throw new MultiException(th);
}
if (service == null && !context.supportsNullCreation()) {
throw new MultiException(new IllegalStateException("Context " +
context + " findOrCreate returned a null for descriptor " + root +
" and handle " + handle));
}
return service;
}
private static final HashSet NOT_INTERCEPTED = new HashSet();
static {
NOT_INTERCEPTED.add(ServiceLocator.class.getName());
NOT_INTERCEPTED.add(InstanceLifecycleListener.class.getName());
NOT_INTERCEPTED.add(InjectionResolver.class.getName());
NOT_INTERCEPTED.add(ErrorService.class.getName());
NOT_INTERCEPTED.add(ClassAnalyzer.class.getName());
NOT_INTERCEPTED.add(DynamicConfigurationListener.class.getName());
NOT_INTERCEPTED.add(DynamicConfigurationService.class.getName());
NOT_INTERCEPTED.add(InterceptionService.class.getName());
NOT_INTERCEPTED.add(ValidationService.class.getName());
NOT_INTERCEPTED.add(Context.class.getName());
}
private final static Interceptors EMTPY_INTERCEPTORS = new Interceptors() {
@Override
public Map> getMethodInterceptors() {
return null;
}
@Override
public List getConstructorInterceptors() {
return null;
}
};
/* package */ static Interceptors getAllInterceptors(
ServiceLocatorImpl impl,
ActiveDescriptor descriptor,
Class clazz,
Constructor c) {
if (descriptor == null || clazz == null || isFinal(clazz)) return EMTPY_INTERCEPTORS;
ClassReflectionHelper crh = impl.getClassReflectionHelper();
List interceptionServices = impl.getInterceptionServices();
if (interceptionServices == null || interceptionServices.isEmpty()) return EMTPY_INTERCEPTORS;
// Make sure it is not one of the special services
for (String contract : descriptor.getAdvertisedContracts()) {
if (NOT_INTERCEPTED.contains(contract)) return EMTPY_INTERCEPTORS;
}
final LinkedHashMap> retVal =
new LinkedHashMap>();
final ArrayList cRetVal = new ArrayList();
for (InterceptionService interceptionService : interceptionServices) {
Filter filter = interceptionService.getDescriptorFilter();
if (BuilderHelper.filterMatches(descriptor, filter)) {
for (MethodWrapper methodWrapper : crh.getAllMethods(clazz)) {
Method method = methodWrapper.getMethod();
if (isFinal(method)) continue;
List interceptors = interceptionService.getMethodInterceptors(method);
if (interceptors != null && !interceptors.isEmpty()) {
List addToMe = retVal.get(method);
if (addToMe == null) {
addToMe = new ArrayList();
retVal.put(method, addToMe);
}
addToMe.addAll(interceptors);
}
}
List cInterceptors = interceptionService.getConstructorInterceptors(c);
if (cInterceptors != null && !cInterceptors.isEmpty()) {
cRetVal.addAll(cInterceptors);
}
}
}
return new Interceptors() {
@Override
public Map> getMethodInterceptors() {
return retVal;
}
@Override
public List getConstructorInterceptors() {
return cRetVal;
}
};
}
/**
* This code uses the TypeChecker but does some extra checking if
* the types are annotations
*
* @param requiredType The type this must conform to
* @param beanType The type of the bean we are checking
* @return true if beanType is safely assignable to requiredType
*/
@SuppressWarnings("unchecked")
public static boolean isTypeSafe(Type requiredType, Type beanType) {
if (TypeChecker.isRawTypeSafe(requiredType, beanType)) return true;
Class requiredClass = ReflectionHelper.getRawClass(requiredType);
if (requiredClass == null) {
return false;
}
// We do some extra checking if we are looking at annotations
if (!requiredClass.isAnnotation()) return false;
Class beanClass = ReflectionHelper.getRawClass(beanType);
if (beanClass == null) {
return false;
}
if (beanClass.isAnnotationPresent((Class) requiredClass)) {
return true;
}
Class trueScope = Utilities.getScopeAnnotationType(beanClass, null);
if (trueScope.equals((Class) requiredClass)) {
return true;
}
return false;
}
private static Boolean proxiesAvailable = null;
/**
* Returns true if the system can create proxies, false otherwise
*
* @return true if the system can create proxies, false otherwise
*/
public synchronized static boolean proxiesAvailable() {
if (proxiesAvailable != null) {
return proxiesAvailable;
}
ClassLoader loader = Utilities.class.getClassLoader();
if (loader == null) {
loader = ClassLoader.getSystemClassLoader();
}
try {
loader.loadClass("javassist.util.proxy.MethodHandler");
proxiesAvailable = true;
return true;
}
catch (Throwable th) {
proxiesAvailable = false;
return false;
}
}
/**
* The return type from getAllInterceptors
*
* @author jwells
*
*/
public interface Interceptors {
/**
* Gets the method interceptors
* @return The possibly null set of method interceptors
*/
public Map> getMethodInterceptors();
/**
* Gets the constructor interceptors
* @return The possibly null set of constructor interceptors
*/
public List getConstructorInterceptors();
}
private static class AnnotationInformation {
private final Set qualifiers;
private final boolean optional;
private final boolean self;
private final Unqualified unqualified;
private AnnotationInformation(Set qualifiers,
boolean optional,
boolean self,
Unqualified unqualified) {
this.qualifiers = qualifiers;
this.optional = optional;
this.self = self;
this.unqualified = unqualified;
}
}
}
