use of org.springframework.core.ParameterNameDiscoverer in project spring-security by spring-projects.
the class DefaultSecurityParameterNameDiscovererTests method constructorDiscoverers.
@Test
public void constructorDiscoverers() {
discoverer = new DefaultSecurityParameterNameDiscoverer(Arrays.asList(new LocalVariableTableParameterNameDiscoverer()));
List<ParameterNameDiscoverer> discoverers = (List<ParameterNameDiscoverer>) ReflectionTestUtils.getField(discoverer, "parameterNameDiscoverers");
assertThat(discoverers.size()).isEqualTo(3);
assertThat(discoverers.get(0)).isInstanceOf(LocalVariableTableParameterNameDiscoverer.class);
ParameterNameDiscoverer annotationDisc = discoverers.get(1);
assertThat(annotationDisc).isInstanceOf(AnnotationParameterNameDiscoverer.class);
Set<String> annotationsToUse = (Set<String>) ReflectionTestUtils.getField(annotationDisc, "annotationClassesToUse");
assertThat(annotationsToUse).containsOnly(P.class.getName());
assertThat(discoverers.get(2).getClass()).isEqualTo(DefaultParameterNameDiscoverer.class);
}
use of org.springframework.core.ParameterNameDiscoverer in project spring-framework by spring-projects.
the class ConstructorResolver method instantiateUsingFactoryMethod.
/**
* Instantiate the bean using a named factory method. The method may be static, if the
* bean definition parameter specifies a class, rather than a "factory-bean", or
* an instance variable on a factory object itself configured using Dependency Injection.
* <p>Implementation requires iterating over the static or instance methods with the
* name specified in the RootBeanDefinition (the method may be overloaded) and trying
* to match with the parameters. We don't have the types attached to constructor args,
* so trial and error is the only way to go here. The explicitArgs array may contain
* argument values passed in programmatically via the corresponding getBean method.
* @param beanName the name of the bean
* @param mbd the merged bean definition for the bean
* @param explicitArgs argument values passed in programmatically via the getBean
* method, or {@code null} if none (-> use constructor argument values from bean definition)
* @return a BeanWrapper for the new instance
*/
public BeanWrapper instantiateUsingFactoryMethod(final String beanName, final RootBeanDefinition mbd, final Object[] explicitArgs) {
BeanWrapperImpl bw = new BeanWrapperImpl();
this.beanFactory.initBeanWrapper(bw);
Object factoryBean;
Class<?> factoryClass;
boolean isStatic;
String factoryBeanName = mbd.getFactoryBeanName();
if (factoryBeanName != null) {
if (factoryBeanName.equals(beanName)) {
throw new BeanDefinitionStoreException(mbd.getResourceDescription(), beanName, "factory-bean reference points back to the same bean definition");
}
factoryBean = this.beanFactory.getBean(factoryBeanName);
if (factoryBean == null) {
throw new BeanCreationException(mbd.getResourceDescription(), beanName, "factory-bean '" + factoryBeanName + "' (or a BeanPostProcessor involved) returned null");
}
if (mbd.isSingleton() && this.beanFactory.containsSingleton(beanName)) {
throw new ImplicitlyAppearedSingletonException();
}
factoryClass = factoryBean.getClass();
isStatic = false;
} else {
// It's a static factory method on the bean class.
if (!mbd.hasBeanClass()) {
throw new BeanDefinitionStoreException(mbd.getResourceDescription(), beanName, "bean definition declares neither a bean class nor a factory-bean reference");
}
factoryBean = null;
factoryClass = mbd.getBeanClass();
isStatic = true;
}
Method factoryMethodToUse = null;
ArgumentsHolder argsHolderToUse = null;
Object[] argsToUse = null;
if (explicitArgs != null) {
argsToUse = explicitArgs;
} else {
Object[] argsToResolve = null;
synchronized (mbd.constructorArgumentLock) {
factoryMethodToUse = (Method) mbd.resolvedConstructorOrFactoryMethod;
if (factoryMethodToUse != null && mbd.constructorArgumentsResolved) {
// Found a cached factory method...
argsToUse = mbd.resolvedConstructorArguments;
if (argsToUse == null) {
argsToResolve = mbd.preparedConstructorArguments;
}
}
}
if (argsToResolve != null) {
argsToUse = resolvePreparedArguments(beanName, mbd, bw, factoryMethodToUse, argsToResolve);
}
}
if (factoryMethodToUse == null || argsToUse == null) {
// Need to determine the factory method...
// Try all methods with this name to see if they match the given arguments.
factoryClass = ClassUtils.getUserClass(factoryClass);
Method[] rawCandidates = getCandidateMethods(factoryClass, mbd);
List<Method> candidateSet = new ArrayList<>();
for (Method candidate : rawCandidates) {
if (Modifier.isStatic(candidate.getModifiers()) == isStatic && mbd.isFactoryMethod(candidate)) {
candidateSet.add(candidate);
}
}
Method[] candidates = candidateSet.toArray(new Method[candidateSet.size()]);
AutowireUtils.sortFactoryMethods(candidates);
ConstructorArgumentValues resolvedValues = null;
boolean autowiring = (mbd.getResolvedAutowireMode() == RootBeanDefinition.AUTOWIRE_CONSTRUCTOR);
int minTypeDiffWeight = Integer.MAX_VALUE;
Set<Method> ambiguousFactoryMethods = null;
int minNrOfArgs;
if (explicitArgs != null) {
minNrOfArgs = explicitArgs.length;
} else {
// We don't have arguments passed in programmatically, so we need to resolve the
// arguments specified in the constructor arguments held in the bean definition.
ConstructorArgumentValues cargs = mbd.getConstructorArgumentValues();
resolvedValues = new ConstructorArgumentValues();
minNrOfArgs = resolveConstructorArguments(beanName, mbd, bw, cargs, resolvedValues);
}
LinkedList<UnsatisfiedDependencyException> causes = null;
for (Method candidate : candidates) {
Class<?>[] paramTypes = candidate.getParameterTypes();
if (paramTypes.length >= minNrOfArgs) {
ArgumentsHolder argsHolder;
if (resolvedValues != null) {
// Resolved constructor arguments: type conversion and/or autowiring necessary.
try {
String[] paramNames = null;
ParameterNameDiscoverer pnd = this.beanFactory.getParameterNameDiscoverer();
if (pnd != null) {
paramNames = pnd.getParameterNames(candidate);
}
argsHolder = createArgumentArray(beanName, mbd, resolvedValues, bw, paramTypes, paramNames, candidate, autowiring);
} catch (UnsatisfiedDependencyException ex) {
if (this.beanFactory.logger.isTraceEnabled()) {
this.beanFactory.logger.trace("Ignoring factory method [" + candidate + "] of bean '" + beanName + "': " + ex);
}
// Swallow and try next overloaded factory method.
if (causes == null) {
causes = new LinkedList<>();
}
causes.add(ex);
continue;
}
} else {
// Explicit arguments given -> arguments length must match exactly.
if (paramTypes.length != explicitArgs.length) {
continue;
}
argsHolder = new ArgumentsHolder(explicitArgs);
}
int typeDiffWeight = (mbd.isLenientConstructorResolution() ? argsHolder.getTypeDifferenceWeight(paramTypes) : argsHolder.getAssignabilityWeight(paramTypes));
// Choose this factory method if it represents the closest match.
if (typeDiffWeight < minTypeDiffWeight) {
factoryMethodToUse = candidate;
argsHolderToUse = argsHolder;
argsToUse = argsHolder.arguments;
minTypeDiffWeight = typeDiffWeight;
ambiguousFactoryMethods = null;
} else // and explicitly ignore overridden methods (with the same parameter signature).
if (factoryMethodToUse != null && typeDiffWeight == minTypeDiffWeight && !mbd.isLenientConstructorResolution() && paramTypes.length == factoryMethodToUse.getParameterCount() && !Arrays.equals(paramTypes, factoryMethodToUse.getParameterTypes())) {
if (ambiguousFactoryMethods == null) {
ambiguousFactoryMethods = new LinkedHashSet<>();
ambiguousFactoryMethods.add(factoryMethodToUse);
}
ambiguousFactoryMethods.add(candidate);
}
}
}
if (factoryMethodToUse == null) {
if (causes != null) {
UnsatisfiedDependencyException ex = causes.removeLast();
for (Exception cause : causes) {
this.beanFactory.onSuppressedException(cause);
}
throw ex;
}
List<String> argTypes = new ArrayList<>(minNrOfArgs);
if (explicitArgs != null) {
for (Object arg : explicitArgs) {
argTypes.add(arg != null ? arg.getClass().getSimpleName() : "null");
}
} else {
Set<ValueHolder> valueHolders = new LinkedHashSet<>(resolvedValues.getArgumentCount());
valueHolders.addAll(resolvedValues.getIndexedArgumentValues().values());
valueHolders.addAll(resolvedValues.getGenericArgumentValues());
for (ValueHolder value : valueHolders) {
String argType = (value.getType() != null ? ClassUtils.getShortName(value.getType()) : (value.getValue() != null ? value.getValue().getClass().getSimpleName() : "null"));
argTypes.add(argType);
}
}
String argDesc = StringUtils.collectionToCommaDelimitedString(argTypes);
throw new BeanCreationException(mbd.getResourceDescription(), beanName, "No matching factory method found: " + (mbd.getFactoryBeanName() != null ? "factory bean '" + mbd.getFactoryBeanName() + "'; " : "") + "factory method '" + mbd.getFactoryMethodName() + "(" + argDesc + ")'. " + "Check that a method with the specified name " + (minNrOfArgs > 0 ? "and arguments " : "") + "exists and that it is " + (isStatic ? "static" : "non-static") + ".");
} else if (void.class == factoryMethodToUse.getReturnType()) {
throw new BeanCreationException(mbd.getResourceDescription(), beanName, "Invalid factory method '" + mbd.getFactoryMethodName() + "': needs to have a non-void return type!");
} else if (ambiguousFactoryMethods != null) {
throw new BeanCreationException(mbd.getResourceDescription(), beanName, "Ambiguous factory method matches found in bean '" + beanName + "' " + "(hint: specify index/type/name arguments for simple parameters to avoid type ambiguities): " + ambiguousFactoryMethods);
}
if (explicitArgs == null && argsHolderToUse != null) {
argsHolderToUse.storeCache(mbd, factoryMethodToUse);
}
}
try {
Object beanInstance;
if (System.getSecurityManager() != null) {
final Object fb = factoryBean;
final Method factoryMethod = factoryMethodToUse;
final Object[] args = argsToUse;
beanInstance = AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
return beanFactory.getInstantiationStrategy().instantiate(mbd, beanName, beanFactory, fb, factoryMethod, args);
}
}, beanFactory.getAccessControlContext());
} else {
beanInstance = this.beanFactory.getInstantiationStrategy().instantiate(mbd, beanName, this.beanFactory, factoryBean, factoryMethodToUse, argsToUse);
}
if (beanInstance == null) {
return null;
}
bw.setBeanInstance(beanInstance);
return bw;
} catch (Throwable ex) {
throw new BeanCreationException(mbd.getResourceDescription(), beanName, "Bean instantiation via factory method failed", ex);
}
}
use of org.springframework.core.ParameterNameDiscoverer in project spring-framework by spring-projects.
the class AbstractAutowireCapableBeanFactory method getTypeForFactoryMethod.
/**
* Determine the target type for the given bean definition which is based on
* a factory method. Only called if there is no singleton instance registered
* for the target bean already.
* <p>This implementation determines the type matching {@link #createBean}'s
* different creation strategies. As far as possible, we'll perform static
* type checking to avoid creation of the target bean.
* @param beanName the name of the bean (for error handling purposes)
* @param mbd the merged bean definition for the bean
* @param typesToMatch the types to match in case of internal type matching purposes
* (also signals that the returned {@code Class} will never be exposed to application code)
* @return the type for the bean if determinable, or {@code null} otherwise
* @see #createBean
*/
protected Class<?> getTypeForFactoryMethod(String beanName, RootBeanDefinition mbd, Class<?>... typesToMatch) {
ResolvableType cachedReturnType = mbd.factoryMethodReturnType;
if (cachedReturnType != null) {
return cachedReturnType.resolve();
}
Class<?> factoryClass;
boolean isStatic = true;
String factoryBeanName = mbd.getFactoryBeanName();
if (factoryBeanName != null) {
if (factoryBeanName.equals(beanName)) {
throw new BeanDefinitionStoreException(mbd.getResourceDescription(), beanName, "factory-bean reference points back to the same bean definition");
}
// Check declared factory method return type on factory class.
factoryClass = getType(factoryBeanName);
isStatic = false;
} else {
// Check declared factory method return type on bean class.
factoryClass = resolveBeanClass(mbd, beanName, typesToMatch);
}
if (factoryClass == null) {
return null;
}
factoryClass = ClassUtils.getUserClass(factoryClass);
// If all factory methods have the same return type, return that type.
// Can't clearly figure out exact method due to type converting / autowiring!
Class<?> commonType = null;
Method uniqueCandidate = null;
int minNrOfArgs = mbd.getConstructorArgumentValues().getArgumentCount();
Method[] candidates = ReflectionUtils.getUniqueDeclaredMethods(factoryClass);
for (Method factoryMethod : candidates) {
if (Modifier.isStatic(factoryMethod.getModifiers()) == isStatic && factoryMethod.getName().equals(mbd.getFactoryMethodName()) && factoryMethod.getParameterCount() >= minNrOfArgs) {
// Declared type variables to inspect?
if (factoryMethod.getTypeParameters().length > 0) {
try {
// Fully resolve parameter names and argument values.
Class<?>[] paramTypes = factoryMethod.getParameterTypes();
String[] paramNames = null;
ParameterNameDiscoverer pnd = getParameterNameDiscoverer();
if (pnd != null) {
paramNames = pnd.getParameterNames(factoryMethod);
}
ConstructorArgumentValues cav = mbd.getConstructorArgumentValues();
Set<ConstructorArgumentValues.ValueHolder> usedValueHolders = new HashSet<>(paramTypes.length);
Object[] args = new Object[paramTypes.length];
for (int i = 0; i < args.length; i++) {
ConstructorArgumentValues.ValueHolder valueHolder = cav.getArgumentValue(i, paramTypes[i], (paramNames != null ? paramNames[i] : null), usedValueHolders);
if (valueHolder == null) {
valueHolder = cav.getGenericArgumentValue(null, null, usedValueHolders);
}
if (valueHolder != null) {
args[i] = valueHolder.getValue();
usedValueHolders.add(valueHolder);
}
}
Class<?> returnType = AutowireUtils.resolveReturnTypeForFactoryMethod(factoryMethod, args, getBeanClassLoader());
if (returnType != null) {
uniqueCandidate = (commonType == null ? factoryMethod : null);
commonType = ClassUtils.determineCommonAncestor(returnType, commonType);
if (commonType == null) {
// Ambiguous return types found: return null to indicate "not determinable".
return null;
}
}
} catch (Throwable ex) {
if (logger.isDebugEnabled()) {
logger.debug("Failed to resolve generic return type for factory method: " + ex);
}
}
} else {
uniqueCandidate = (commonType == null ? factoryMethod : null);
commonType = ClassUtils.determineCommonAncestor(factoryMethod.getReturnType(), commonType);
if (commonType == null) {
// Ambiguous return types found: return null to indicate "not determinable".
return null;
}
}
}
}
if (commonType != null) {
// Clear return type found: all factory methods return same type.
mbd.factoryMethodReturnType = (uniqueCandidate != null ? ResolvableType.forMethodReturnType(uniqueCandidate) : ResolvableType.forClass(commonType));
}
return commonType;
}
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