public Object getObject() throws BeansException 
{
		BeanWrapper target = this.targetBeanWrapper;
		if (target == null) {
			// Fetch prototype target bean...
			Object bean = this.beanFactory.getBean(this.targetBeanName);
			target = PropertyAccessorFactory.forBeanPropertyAccess(bean);
		}
		return target.getPropertyValue(this.propertyPath);
}

 public Class getObjectType() 
{
		return this.resultType;
}

 public boolean isSingleton() 
{
		return false;
}

While this FactoryBean will often be used for singleton targets, the invoked getters for the property path might return a new object for each call, so we have to assume that we're not returning the same object for each #getObject() call.

 public  void setBeanFactory(BeanFactory beanFactory) 
{
		this.beanFactory = beanFactory;
		if (this.targetBeanWrapper != null && this.targetBeanName != null) {
			throw new IllegalArgumentException("Specify either 'targetObject' or 'targetBeanName', not both");
		}
		if (this.targetBeanWrapper == null && this.targetBeanName == null) {
			if (this.propertyPath != null) {
				throw new IllegalArgumentException(
				    "Specify 'targetObject' or 'targetBeanName' in combination with 'propertyPath'");
			}
			// No other properties specified: check bean name.
			int dotIndex = this.beanName.indexOf('.");
			if (dotIndex == -1) {
				throw new IllegalArgumentException(
				    "Neither 'targetObject' nor 'targetBeanName' specified, and PropertyPathFactoryBean " +
				    "bean name '" + this.beanName + "' does not follow 'beanName.property' syntax");
			}
			this.targetBeanName = this.beanName.substring(0, dotIndex);
			this.propertyPath = this.beanName.substring(dotIndex + 1);
		}
		else if (this.propertyPath == null) {
			// either targetObject or targetBeanName specified
			throw new IllegalArgumentException("'propertyPath' is required");
		}
		if (this.targetBeanWrapper == null && this.beanFactory.isSingleton(this.targetBeanName)) {
			// Eagerly fetch singleton target bean, and determine result type.
			Object bean = this.beanFactory.getBean(this.targetBeanName);
			this.targetBeanWrapper = PropertyAccessorFactory.forBeanPropertyAccess(bean);
			this.resultType = this.targetBeanWrapper.getPropertyType(this.propertyPath);
		}
}

 public  void setBeanName(String beanName) 
{
		this.beanName = StringUtils.trimAllWhitespace(BeanFactoryUtils.originalBeanName(beanName));
}

The bean name of this PropertyPathFactoryBean will be interpreted as "beanName.property" pattern, if neither "targetObject" nor "targetBeanName" nor "propertyPath" have been specified. This allows for concise bean definitions with just an id/name.

 public  void setPropertyPath(String propertyPath) 
{
		this.propertyPath = StringUtils.trimAllWhitespace(propertyPath);
}

Specify the property path to apply to the target.

 public  void setResultType(Class resultType) 
{
		this.resultType = resultType;
}

Specify the type of the result from evaluating the property path.

Note: This is not necessary for directly specified target objects or singleton target beans, where the type can be determined through introspection. Just specify this in case of a prototype target, provided that you need matching by type (for example, for autowiring).

 public  void setTargetBeanName(String targetBeanName) 
{
		this.targetBeanName = StringUtils.trimAllWhitespace(targetBeanName);
}

Specify the name of a target bean to apply the property path to. Alternatively, specify a target object directly.

 public  void setTargetObject(Object targetObject) 
{
		this.targetBeanWrapper = PropertyAccessorFactory.forBeanPropertyAccess(targetObject);
}

Specify a target object to apply the property path to. Alternatively, specify a target bean name.