Examples with ConstructorArgumentValues org.springframework.beans.factory.config.ConstructorArgumentValues used on opensource projects

Example 91 with ConstructorArgumentValues

use of org.springframework.beans.factory.config.ConstructorArgumentValues 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);
    }
}

Example 92 with ConstructorArgumentValues

use of org.springframework.beans.factory.config.ConstructorArgumentValues in project spring-framework by spring-projects.

the class ConstructorResolver method resolveConstructorArguments.

/**
	 * Resolve the constructor arguments for this bean into the resolvedValues object.
	 * This may involve looking up other beans.
	 * <p>This method is also used for handling invocations of static factory methods.
	 */
private int resolveConstructorArguments(String beanName, RootBeanDefinition mbd, BeanWrapper bw, ConstructorArgumentValues cargs, ConstructorArgumentValues resolvedValues) {
    TypeConverter customConverter = this.beanFactory.getCustomTypeConverter();
    TypeConverter converter = (customConverter != null ? customConverter : bw);
    BeanDefinitionValueResolver valueResolver = new BeanDefinitionValueResolver(this.beanFactory, beanName, mbd, converter);
    int minNrOfArgs = cargs.getArgumentCount();
    for (Map.Entry<Integer, ConstructorArgumentValues.ValueHolder> entry : cargs.getIndexedArgumentValues().entrySet()) {
        int index = entry.getKey();
        if (index < 0) {
            throw new BeanCreationException(mbd.getResourceDescription(), beanName, "Invalid constructor argument index: " + index);
        }
        if (index > minNrOfArgs) {
            minNrOfArgs = index + 1;
        }
        ConstructorArgumentValues.ValueHolder valueHolder = entry.getValue();
        if (valueHolder.isConverted()) {
            resolvedValues.addIndexedArgumentValue(index, valueHolder);
        } else {
            Object resolvedValue = valueResolver.resolveValueIfNecessary("constructor argument", valueHolder.getValue());
            ConstructorArgumentValues.ValueHolder resolvedValueHolder = new ConstructorArgumentValues.ValueHolder(resolvedValue, valueHolder.getType(), valueHolder.getName());
            resolvedValueHolder.setSource(valueHolder);
            resolvedValues.addIndexedArgumentValue(index, resolvedValueHolder);
        }
    }
    for (ConstructorArgumentValues.ValueHolder valueHolder : cargs.getGenericArgumentValues()) {
        if (valueHolder.isConverted()) {
            resolvedValues.addGenericArgumentValue(valueHolder);
        } else {
            Object resolvedValue = valueResolver.resolveValueIfNecessary("constructor argument", valueHolder.getValue());
            ConstructorArgumentValues.ValueHolder resolvedValueHolder = new ConstructorArgumentValues.ValueHolder(resolvedValue, valueHolder.getType(), valueHolder.getName());
            resolvedValueHolder.setSource(valueHolder);
            resolvedValues.addGenericArgumentValue(resolvedValueHolder);
        }
    }
    return minNrOfArgs;
}

Example 93 with ConstructorArgumentValues

use of org.springframework.beans.factory.config.ConstructorArgumentValues 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;
}

Example 94 with ConstructorArgumentValues

use of org.springframework.beans.factory.config.ConstructorArgumentValues in project dal by ctripcorp.

the class DalTransactionalEnabler method replaceBeanDefinition.

private void replaceBeanDefinition() {
    for (String beanName : getBeanDefinitionNames()) {
        BeanDefinition beanDef = getBeanDefinition(beanName);
        String beanClassName = beanDef.getBeanClassName();
        if (beanClassName == null || beanClassName.equals(BEAN_FACTORY_NAME))
            continue;
        Class beanClass;
        try {
            beanClass = Class.forName(beanDef.getBeanClassName());
        } catch (ClassNotFoundException e) {
            throw new BeanDefinitionValidationException("Cannot validate bean: " + beanName, e);
        }
        boolean annotated = false;
        for (Method method : beanClass.getMethods()) {
            if (isTransactionAnnotated(method)) {
                annotated = true;
                break;
            }
        }
        if (!annotated)
            continue;
        beanDef.setBeanClassName(BEAN_FACTORY_NAME);
        beanDef.setFactoryMethodName(FACTORY_METHOD_NAME);
        ConstructorArgumentValues cav = beanDef.getConstructorArgumentValues();
        if (cav.getArgumentCount() != 0)
            throw new BeanDefinitionValidationException("The transactional bean can only be instantiated with default constructor.");
        cav.addGenericArgumentValue(beanClass.getName());
    }
}

Example 95 with ConstructorArgumentValues

use of org.springframework.beans.factory.config.ConstructorArgumentValues in project spring-data-mongodb by spring-projects.

the class MongoDbFactoryParserIntegrationTests method setsUpClientUriWithId.

// DATAMONGO-1293
@Test
public void setsUpClientUriWithId() {
    reader.loadBeanDefinitions(new ClassPathResource("namespace/mongo-client-uri-and-id.xml"));
    BeanDefinition definition = factory.getBeanDefinition("testMongo");
    ConstructorArgumentValues constructorArguments = definition.getConstructorArgumentValues();
    assertThat(constructorArguments.getArgumentCount(), is(1));
    ValueHolder argument = constructorArguments.getArgumentValue(0, MongoClientURI.class);
    assertThat(argument, is(notNullValue()));
}