Java Code Examples for org.springframework.beans.factory.config.BeanDefinition#isSingleton()

The following examples show how to use org.springframework.beans.factory.config.BeanDefinition#isSingleton() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: MangoBeanDefinitionParser.java From mango with Apache License 2.0

5 votes

private static void parseSingleRef(String property, Element element, BeanDefinition bd,
                                   ParserContext parserContext) {

    String value = element.getAttribute(property);
    if (StringUtils.isNotBlank(value)) {
        if (parserContext.getRegistry().containsBeanDefinition(value)) {
            BeanDefinition refBean = parserContext.getRegistry().getBeanDefinition(value);
            if (!refBean.isSingleton()) {
                throw new IllegalStateException("The exported service ref " + value + " must be singleton! Please set the " + value
                        + " bean scope to singleton, eg: <bean id=\"" + value + "\" scope=\"singleton\" ...>");
            }
        }
        bd.getPropertyValues().addPropertyValue(property, new RuntimeBeanReference(value));
    }
}

Example 2

Source File: ScriptFactoryPostProcessor.java From spring-analysis-note with MIT License

4 votes

@Override
@Nullable
public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
	// We only apply special treatment to ScriptFactory implementations here.
	if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
		return null;
	}

	Assert.state(this.beanFactory != null, "No BeanFactory set");
	BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

	try {
		String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
		String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
		prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

		ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
		ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
		Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

		Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
		if (scriptedType != null) {
			return scriptedType;
		}
		else if (!ObjectUtils.isEmpty(interfaces)) {
			return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
		}
		else {
			if (bd.isSingleton()) {
				return this.scriptBeanFactory.getBean(scriptedObjectBeanName).getClass();
			}
		}
	}
	catch (Exception ex) {
		if (ex instanceof BeanCreationException &&
				((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
			if (logger.isTraceEnabled()) {
				logger.trace("Could not determine scripted object type for bean '" + beanName + "': " +
						ex.getMessage());
			}
		}
		else {
			if (logger.isDebugEnabled()) {
				logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
			}
		}
	}

	return null;
}

Example 3

Source File: AbstractBeanFactory.java From spring-analysis-note with MIT License

4 votes

/**
 * Return a RootBeanDefinition for the given bean, by merging with the
 * parent if the given bean's definition is a child bean definition.
 * @param beanName the name of the bean definition
 * @param bd the original bean definition (Root/ChildBeanDefinition)
 * @param containingBd the containing bean definition in case of inner bean,
 * or {@code null} in case of a top-level bean
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 */
protected RootBeanDefinition getMergedBeanDefinition(
		String beanName, BeanDefinition bd, @Nullable BeanDefinition containingBd)
		throws BeanDefinitionStoreException {

	synchronized (this.mergedBeanDefinitions) {
		RootBeanDefinition mbd = null;

		// Check with full lock now in order to enforce the same merged instance.
		if (containingBd == null) {
			mbd = this.mergedBeanDefinitions.get(beanName);
		}

		if (mbd == null) {
			if (bd.getParentName() == null) {
				// Use copy of given root bean definition.
				if (bd instanceof RootBeanDefinition) {
					mbd = ((RootBeanDefinition) bd).cloneBeanDefinition();
				}
				else {
					mbd = new RootBeanDefinition(bd);
				}
			}
			else {
				// Child bean definition: needs to be merged with parent.
				BeanDefinition pbd;
				try {
					String parentBeanName = transformedBeanName(bd.getParentName());
					if (!beanName.equals(parentBeanName)) {
						pbd = getMergedBeanDefinition(parentBeanName);
					}
					else {
						BeanFactory parent = getParentBeanFactory();
						if (parent instanceof ConfigurableBeanFactory) {
							pbd = ((ConfigurableBeanFactory) parent).getMergedBeanDefinition(parentBeanName);
						}
						else {
							throw new NoSuchBeanDefinitionException(parentBeanName,
									"Parent name '" + parentBeanName + "' is equal to bean name '" + beanName +
									"': cannot be resolved without an AbstractBeanFactory parent");
						}
					}
				}
				catch (NoSuchBeanDefinitionException ex) {
					throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
							"Could not resolve parent bean definition '" + bd.getParentName() + "'", ex);
				}
				// Deep copy with overridden values.
				mbd = new RootBeanDefinition(pbd);
				mbd.overrideFrom(bd);
			}

			// Set default singleton scope, if not configured before.
			if (!StringUtils.hasLength(mbd.getScope())) {
				mbd.setScope(RootBeanDefinition.SCOPE_SINGLETON);
			}

			// A bean contained in a non-singleton bean cannot be a singleton itself.
			// Let's correct this on the fly here, since this might be the result of
			// parent-child merging for the outer bean, in which case the original inner bean
			// definition will not have inherited the merged outer bean's singleton status.
			if (containingBd != null && !containingBd.isSingleton() && mbd.isSingleton()) {
				mbd.setScope(containingBd.getScope());
			}

			// Cache the merged bean definition for the time being
			// (it might still get re-merged later on in order to pick up metadata changes)
			if (containingBd == null && isCacheBeanMetadata()) {
				this.mergedBeanDefinitions.put(beanName, mbd);
			}
		}

		return mbd;
	}
}

Example 4

Source File: ScriptFactoryPostProcessor.java From java-technology-stack with MIT License

4 votes

@Override
@Nullable
public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
	// We only apply special treatment to ScriptFactory implementations here.
	if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
		return null;
	}

	Assert.state(this.beanFactory != null, "No BeanFactory set");
	BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

	try {
		String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
		String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
		prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

		ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
		ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
		Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

		Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
		if (scriptedType != null) {
			return scriptedType;
		}
		else if (!ObjectUtils.isEmpty(interfaces)) {
			return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
		}
		else {
			if (bd.isSingleton()) {
				return this.scriptBeanFactory.getBean(scriptedObjectBeanName).getClass();
			}
		}
	}
	catch (Exception ex) {
		if (ex instanceof BeanCreationException &&
				((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
			if (logger.isTraceEnabled()) {
				logger.trace("Could not determine scripted object type for bean '" + beanName + "': " +
						ex.getMessage());
			}
		}
		else {
			if (logger.isDebugEnabled()) {
				logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
			}
		}
	}

	return null;
}

Example 5

Source File: AbstractBeanFactory.java From java-technology-stack with MIT License

4 votes

/**
 * Return a RootBeanDefinition for the given bean, by merging with the
 * parent if the given bean's definition is a child bean definition.
 * @param beanName the name of the bean definition
 * @param bd the original bean definition (Root/ChildBeanDefinition)
 * @param containingBd the containing bean definition in case of inner bean,
 * or {@code null} in case of a top-level bean
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 */
protected RootBeanDefinition getMergedBeanDefinition(
		String beanName, BeanDefinition bd, @Nullable BeanDefinition containingBd)
		throws BeanDefinitionStoreException {

	synchronized (this.mergedBeanDefinitions) {
		RootBeanDefinition mbd = null;

		// Check with full lock now in order to enforce the same merged instance.
		if (containingBd == null) {
			mbd = this.mergedBeanDefinitions.get(beanName);
		}

		if (mbd == null) {
			if (bd.getParentName() == null) {
				// Use copy of given root bean definition.
				if (bd instanceof RootBeanDefinition) {
					mbd = ((RootBeanDefinition) bd).cloneBeanDefinition();
				}
				else {
					mbd = new RootBeanDefinition(bd);
				}
			}
			else {
				// Child bean definition: needs to be merged with parent.
				BeanDefinition pbd;
				try {
					String parentBeanName = transformedBeanName(bd.getParentName());
					if (!beanName.equals(parentBeanName)) {
						pbd = getMergedBeanDefinition(parentBeanName);
					}
					else {
						BeanFactory parent = getParentBeanFactory();
						if (parent instanceof ConfigurableBeanFactory) {
							pbd = ((ConfigurableBeanFactory) parent).getMergedBeanDefinition(parentBeanName);
						}
						else {
							throw new NoSuchBeanDefinitionException(parentBeanName,
									"Parent name '" + parentBeanName + "' is equal to bean name '" + beanName +
									"': cannot be resolved without an AbstractBeanFactory parent");
						}
					}
				}
				catch (NoSuchBeanDefinitionException ex) {
					throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
							"Could not resolve parent bean definition '" + bd.getParentName() + "'", ex);
				}
				// Deep copy with overridden values.
				mbd = new RootBeanDefinition(pbd);
				mbd.overrideFrom(bd);
			}

			// Set default singleton scope, if not configured before.
			if (!StringUtils.hasLength(mbd.getScope())) {
				mbd.setScope(RootBeanDefinition.SCOPE_SINGLETON);
			}

			// A bean contained in a non-singleton bean cannot be a singleton itself.
			// Let's correct this on the fly here, since this might be the result of
			// parent-child merging for the outer bean, in which case the original inner bean
			// definition will not have inherited the merged outer bean's singleton status.
			if (containingBd != null && !containingBd.isSingleton() && mbd.isSingleton()) {
				mbd.setScope(containingBd.getScope());
			}

			// Cache the merged bean definition for the time being
			// (it might still get re-merged later on in order to pick up metadata changes)
			if (containingBd == null && isCacheBeanMetadata()) {
				this.mergedBeanDefinitions.put(beanName, mbd);
			}
		}

		return mbd;
	}
}

Example 6

Source File: ScriptFactoryPostProcessor.java From lams with GNU General Public License v2.0

4 votes

@Override
public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
	// We only apply special treatment to ScriptFactory implementations here.
	if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
		return null;
	}

	BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

	try {
		String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
		String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
		prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

		ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
		ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
		Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

		Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
		if (scriptedType != null) {
			return scriptedType;
		}
		else if (!ObjectUtils.isEmpty(interfaces)) {
			return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
		}
		else {
			if (bd.isSingleton()) {
				Object bean = this.scriptBeanFactory.getBean(scriptedObjectBeanName);
				if (bean != null) {
					return bean.getClass();
				}
			}
		}
	}
	catch (Exception ex) {
		if (ex instanceof BeanCreationException &&
				((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
			if (logger.isTraceEnabled()) {
				logger.trace("Could not determine scripted object type for bean '" + beanName + "': "
						+ ex.getMessage());
			}
		}
		else {
			if (logger.isDebugEnabled()) {
				logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
			}
		}
	}

	return null;
}

Example 7

Source File: AbstractBeanFactory.java From lams with GNU General Public License v2.0

4 votes

/**
 * Return a RootBeanDefinition for the given bean, by merging with the
 * parent if the given bean's definition is a child bean definition.
 * @param beanName the name of the bean definition
 * @param bd the original bean definition (Root/ChildBeanDefinition)
 * @param containingBd the containing bean definition in case of inner bean,
 * or {@code null} in case of a top-level bean
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 */
protected RootBeanDefinition getMergedBeanDefinition(
		String beanName, BeanDefinition bd, BeanDefinition containingBd)
		throws BeanDefinitionStoreException {

	synchronized (this.mergedBeanDefinitions) {
		RootBeanDefinition mbd = null;

		// Check with full lock now in order to enforce the same merged instance.
		if (containingBd == null) {
			mbd = this.mergedBeanDefinitions.get(beanName);
		}

		if (mbd == null) {
			if (bd.getParentName() == null) {
				// Use copy of given root bean definition.
				if (bd instanceof RootBeanDefinition) {
					mbd = ((RootBeanDefinition) bd).cloneBeanDefinition();
				}
				else {
					mbd = new RootBeanDefinition(bd);
				}
			}
			else {
				// Child bean definition: needs to be merged with parent.
				BeanDefinition pbd;
				try {
					String parentBeanName = transformedBeanName(bd.getParentName());
					if (!beanName.equals(parentBeanName)) {
						pbd = getMergedBeanDefinition(parentBeanName);
					}
					else {
						BeanFactory parent = getParentBeanFactory();
						if (parent instanceof ConfigurableBeanFactory) {
							pbd = ((ConfigurableBeanFactory) parent).getMergedBeanDefinition(parentBeanName);
						}
						else {
							throw new NoSuchBeanDefinitionException(parentBeanName,
									"Parent name '" + parentBeanName + "' is equal to bean name '" + beanName +
									"': cannot be resolved without an AbstractBeanFactory parent");
						}
					}
				}
				catch (NoSuchBeanDefinitionException ex) {
					throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
							"Could not resolve parent bean definition '" + bd.getParentName() + "'", ex);
				}
				// Deep copy with overridden values.
				mbd = new RootBeanDefinition(pbd);
				mbd.overrideFrom(bd);
			}

			// Set default singleton scope, if not configured before.
			if (!StringUtils.hasLength(mbd.getScope())) {
				mbd.setScope(RootBeanDefinition.SCOPE_SINGLETON);
			}

			// A bean contained in a non-singleton bean cannot be a singleton itself.
			// Let's correct this on the fly here, since this might be the result of
			// parent-child merging for the outer bean, in which case the original inner bean
			// definition will not have inherited the merged outer bean's singleton status.
			if (containingBd != null && !containingBd.isSingleton() && mbd.isSingleton()) {
				mbd.setScope(containingBd.getScope());
			}

			// Cache the merged bean definition for the time being
			// (it might still get re-merged later on in order to pick up metadata changes)
			if (containingBd == null && isCacheBeanMetadata()) {
				this.mergedBeanDefinitions.put(beanName, mbd);
			}
		}

		return mbd;
	}
}

Example 8

Source File: AbstractBeanFactory.java From blog_demos with Apache License 2.0

4 votes

/**
 * Return a RootBeanDefinition for the given bean, by merging with the
 * parent if the given bean's definition is a child bean definition.
 * @param beanName the name of the bean definition
 * @param bd the original bean definition (Root/ChildBeanDefinition)
 * @param containingBd the containing bean definition in case of inner bean,
 * or {@code null} in case of a top-level bean
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 */
protected RootBeanDefinition getMergedBeanDefinition(
		String beanName, BeanDefinition bd, BeanDefinition containingBd)
		throws BeanDefinitionStoreException {

	synchronized (this.mergedBeanDefinitions) {
		RootBeanDefinition mbd = null;

		// Check with full lock now in order to enforce the same merged instance.
		if (containingBd == null) {
			mbd = this.mergedBeanDefinitions.get(beanName);
		}

		if (mbd == null) {
			if (bd.getParentName() == null) {
				// Use copy of given root bean definition.
				if (bd instanceof RootBeanDefinition) {
					mbd = ((RootBeanDefinition) bd).cloneBeanDefinition();
				}
				else {
					mbd = new RootBeanDefinition(bd);
				}
			}
			else {
				// Child bean definition: needs to be merged with parent.
				BeanDefinition pbd;
				try {
					String parentBeanName = transformedBeanName(bd.getParentName());
					if (!beanName.equals(parentBeanName)) {
						pbd = getMergedBeanDefinition(parentBeanName);
					}
					else {
						if (getParentBeanFactory() instanceof ConfigurableBeanFactory) {
							pbd = ((ConfigurableBeanFactory) getParentBeanFactory()).getMergedBeanDefinition(parentBeanName);
						}
						else {
							throw new NoSuchBeanDefinitionException(bd.getParentName(),
									"Parent name '" + bd.getParentName() + "' is equal to bean name '" + beanName +
									"': cannot be resolved without an AbstractBeanFactory parent");
						}
					}
				}
				catch (NoSuchBeanDefinitionException ex) {
					throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
							"Could not resolve parent bean definition '" + bd.getParentName() + "'", ex);
				}
				// Deep copy with overridden values.
				mbd = new RootBeanDefinition(pbd);
				mbd.overrideFrom(bd);
			}

			// Set default singleton scope, if not configured before.
			if (!StringUtils.hasLength(mbd.getScope())) {
				mbd.setScope(RootBeanDefinition.SCOPE_SINGLETON);
			}

			// A bean contained in a non-singleton bean cannot be a singleton itself.
			// Let's correct this on the fly here, since this might be the result of
			// parent-child merging for the outer bean, in which case the original inner bean
			// definition will not have inherited the merged outer bean's singleton status.
			if (containingBd != null && !containingBd.isSingleton() && mbd.isSingleton()) {
				mbd.setScope(containingBd.getScope());
			}

			// Only cache the merged bean definition if we're already about to create an
			// instance of the bean, or at least have already created an instance before.
			if (containingBd == null && isCacheBeanMetadata() && isBeanEligibleForMetadataCaching(beanName)) {
				this.mergedBeanDefinitions.put(beanName, mbd);
			}
		}

		return mbd;
	}
}

Example 9

Source File: ScriptFactoryPostProcessor.java From spring4-understanding with Apache License 2.0

4 votes

@Override
public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
	// We only apply special treatment to ScriptFactory implementations here.
	if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
		return null;
	}

	BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

	try {
		String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
		String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
		prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

		ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
		ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
		Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

		Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
		if (scriptedType != null) {
			return scriptedType;
		}
		else if (!ObjectUtils.isEmpty(interfaces)) {
			return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
		}
		else {
			if (bd.isSingleton()) {
				Object bean = this.scriptBeanFactory.getBean(scriptedObjectBeanName);
				if (bean != null) {
					return bean.getClass();
				}
			}
		}
	}
	catch (Exception ex) {
		if (ex instanceof BeanCreationException
				&& ((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
			if (logger.isTraceEnabled()) {
				logger.trace("Could not determine scripted object type for bean '" + beanName + "': "
						+ ex.getMessage());
			}
		}
		else {
			if (logger.isDebugEnabled()) {
				logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
			}
		}
	}

	return null;
}

Example 10

Source File: AbstractBeanFactory.java From spring4-understanding with Apache License 2.0

4 votes

/**
 * Return a RootBeanDefinition for the given bean, by merging with the
 * parent if the given bean's definition is a child bean definition.
 * @param beanName the name of the bean definition
 * @param bd the original bean definition (Root/ChildBeanDefinition)
 * @param containingBd the containing bean definition in case of inner bean,
 * or {@code null} in case of a top-level bean
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 */
protected RootBeanDefinition getMergedBeanDefinition(
		String beanName, BeanDefinition bd, BeanDefinition containingBd)
		throws BeanDefinitionStoreException {

	synchronized (this.mergedBeanDefinitions) {
		RootBeanDefinition mbd = null;

		// Check with full lock now in order to enforce the same merged instance.
		if (containingBd == null) {
			mbd = this.mergedBeanDefinitions.get(beanName);
		}

		if (mbd == null) {
			if (bd.getParentName() == null) {
				// Use copy of given root bean definition.
				if (bd instanceof RootBeanDefinition) {
					mbd = ((RootBeanDefinition) bd).cloneBeanDefinition();
				}
				else {
					mbd = new RootBeanDefinition(bd);
				}
			}
			else {
				// Child bean definition: needs to be merged with parent.
				BeanDefinition pbd;
				try {
					String parentBeanName = transformedBeanName(bd.getParentName());
					if (!beanName.equals(parentBeanName)) {
						pbd = getMergedBeanDefinition(parentBeanName);
					}
					else {
						if (getParentBeanFactory() instanceof ConfigurableBeanFactory) {
							pbd = ((ConfigurableBeanFactory) getParentBeanFactory()).getMergedBeanDefinition(parentBeanName);
						}
						else {
							throw new NoSuchBeanDefinitionException(bd.getParentName(),
									"Parent name '" + bd.getParentName() + "' is equal to bean name '" + beanName +
									"': cannot be resolved without an AbstractBeanFactory parent");
						}
					}
				}
				catch (NoSuchBeanDefinitionException ex) {
					throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
							"Could not resolve parent bean definition '" + bd.getParentName() + "'", ex);
				}
				// Deep copy with overridden values.
				mbd = new RootBeanDefinition(pbd);
				mbd.overrideFrom(bd);
			}

			// Set default singleton scope, if not configured before.
			if (!StringUtils.hasLength(mbd.getScope())) {
				mbd.setScope(RootBeanDefinition.SCOPE_SINGLETON);
			}

			// A bean contained in a non-singleton bean cannot be a singleton itself.
			// Let's correct this on the fly here, since this might be the result of
			// parent-child merging for the outer bean, in which case the original inner bean
			// definition will not have inherited the merged outer bean's singleton status.
			if (containingBd != null && !containingBd.isSingleton() && mbd.isSingleton()) {
				mbd.setScope(containingBd.getScope());
			}

			// Only cache the merged bean definition if we're already about to create an
			// instance of the bean, or at least have already created an instance before.
			if (containingBd == null && isCacheBeanMetadata()) {
				this.mergedBeanDefinitions.put(beanName, mbd);
			}
		}

		return mbd;
	}
}