org.springframework.beans.factory.config
Class PropertyOverrideConfigurer

java.lang.Object
  org.springframework.beans.factory.config.PropertyResourceConfigurer
      org.springframework.beans.factory.config.PropertyOverrideConfigurer

All Implemented Interfaces:

BeanFactoryPostProcessor, Ordered

public class PropertyOverrideConfigurer

extends PropertyResourceConfigurer

A property resource configurer that overrides bean property values in an application context definition. It pushes values from a properties file into bean definitions.

Configuration lines are expected to be of the following form:

 beanName.property=value

Example properties file:

 dataSource.driverClassName=com.mysql.jdbc.Driver
 dataSource.url=jdbc:mysql:mydb

In contrast to PropertyPlaceholderConfigurer, the original definition can have default values or no values at all for such bean properties. If an overriding properties file does not have an entry for a certain bean property, the default context definition is used.

Note that the context definition is not aware of being overridden; so this is not immediately obvious when looking at the XML definition file.

In case of multiple PropertyOverrideConfigurers that define different values for the same bean property, the last one will win (due to the overriding mechanism).

Since:

12.03.2003

Author:

Juergen Hoeller

See Also:

PropertyPlaceholderConfigurer

Field Summary

Fields inherited from class org.springframework.beans.factory.config.PropertyResourceConfigurer

logger

Constructor Summary

PropertyOverrideConfigurer()

Method Summary

protected void	applyPropertyValue(ConfigurableListableBeanFactory factory, java.lang.String beanName, java.lang.String property, java.lang.String value)
boolean	hasPropertyOverridesFor(java.lang.String beanName) Were there overrides for this bean?
protected void	processKey(ConfigurableListableBeanFactory factory, java.lang.String key, java.lang.String value) Process the given key as 'beanName.property' entry.
protected void	processProperties(ConfigurableListableBeanFactory beanFactory, java.util.Properties props) Apply the given Properties to the bean factory.

Methods inherited from class org.springframework.beans.factory.config.PropertyResourceConfigurer

getOrder, postProcessBeanFactory, setIgnoreResourceNotFound, setLocation, setLocations, setOrder, setProperties

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PropertyOverrideConfigurer

public PropertyOverrideConfigurer()

Method Detail

processProperties

protected void processProperties(ConfigurableListableBeanFactory beanFactory,
                                 java.util.Properties props)
                          throws BeansException

Description copied from class: PropertyResourceConfigurer

Apply the given Properties to the bean factory.

Specified by:

processProperties in class PropertyResourceConfigurer

Parameters:

beanFactory - the bean factory used by the application context

props - the Properties to apply

Throws:

BeansException - in case of errors

processKey

protected void processKey(ConfigurableListableBeanFactory factory,
                          java.lang.String key,
                          java.lang.String value)
                   throws BeansException

Process the given key as 'beanName.property' entry.

Throws:

BeansException

applyPropertyValue

protected void applyPropertyValue(ConfigurableListableBeanFactory factory,
                                  java.lang.String beanName,
                                  java.lang.String property,
                                  java.lang.String value)

hasPropertyOverridesFor

public boolean hasPropertyOverridesFor(java.lang.String beanName)

Were there overrides for this bean? Only valid after processing has occurred at least once

Parameters:

beanName - name of the bean to query status for

Returns:

whether there were property overrides for the named bean