Example usage for org.springframework.beans.factory.support AbstractBeanFactory getMergedBeanDefinition

Introduction

In this page you can find the example usage for org.springframework.beans.factory.support AbstractBeanFactory getMergedBeanDefinition.

Prototype

protected RootBeanDefinition getMergedBeanDefinition(String beanName, BeanDefinition bd)
        throws BeanDefinitionStoreException 

Source Link

Document

Return a RootBeanDefinition for the given top-level bean, by merging with the parent if the given bean's definition is a child bean definition.

Usage

From source file:org.springframework.beans.factory.support.AbstractBeanFactory.java

/**
 * Return a RootBeanDefinition for the given top-level 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)
 * @return a (potentially merged) RootBeanDefinition for the given bean
 * @throws BeanDefinitionStoreException in case of an invalid bean definition
 *///w  w  w .  ja v a 2 s .  c om
protected RootBeanDefinition getMergedBeanDefinition(String beanName, BeanDefinition bd)
        throws BeanDefinitionStoreException {

    if (bd instanceof RootBeanDefinition) {
        // Return root bean definition as-is.
        return (RootBeanDefinition) bd;
    }

    else if (bd instanceof ChildBeanDefinition) {
        // Child bean definition: needs to be merged with parent.
        ChildBeanDefinition cbd = (ChildBeanDefinition) bd;
        RootBeanDefinition pbd = null;
        try {
            if (!beanName.equals(cbd.getParentName())) {
                pbd = getMergedBeanDefinition(cbd.getParentName(), true);
            } else {
                if (getParentBeanFactory() instanceof AbstractBeanFactory) {
                    AbstractBeanFactory parentFactory = (AbstractBeanFactory) getParentBeanFactory();
                    pbd = parentFactory.getMergedBeanDefinition(cbd.getParentName(), true);
                } else {
                    throw new NoSuchBeanDefinitionException(cbd.getParentName(),
                            "Parent name '" + cbd.getParentName() + "' is equal to bean name '" + beanName
                                    + "': cannot be resolved without an AbstractBeanFactory parent");
                }
            }
        } catch (NoSuchBeanDefinitionException ex) {
            throw new BeanDefinitionStoreException(cbd.getResourceDescription(), beanName,
                    "Could not resolve parent bean definition '" + cbd.getParentName() + "'", ex);
        }

        // Deep copy with overridden values.
        RootBeanDefinition rbd = new RootBeanDefinition(pbd);
        rbd.overrideFrom(cbd);

        // Validate merged definition: mainly to prepare method overrides.
        try {
            rbd.validate();
        } catch (BeanDefinitionValidationException ex) {
            throw new BeanDefinitionStoreException(rbd.getResourceDescription(), beanName,
                    "Validation of bean definition failed", ex);
        }

        return rbd;
    }

    else {
        throw new BeanDefinitionStoreException(bd.getResourceDescription(), beanName,
                "Definition is neither a RootBeanDefinition nor a ChildBeanDefinition");
    }
}

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