Package org.springframework.context.support

Class PropertySourcesPlaceholderConfigurer

java.lang.Object

org.springframework.core.io.support.PropertiesLoaderSupport

org.springframework.beans.factory.config.PropertyResourceConfigurer

org.springframework.beans.factory.config.PlaceholderConfigurerSupport

org.springframework.context.support.PropertySourcesPlaceholderConfigurer

All Implemented Interfaces:

Aware, BeanFactoryAware, BeanNameAware, BeanFactoryPostProcessor, EnvironmentAware, Ordered, PriorityOrdered

public class PropertySourcesPlaceholderConfigurer
extends PlaceholderConfigurerSupport
implements EnvironmentAware

Specialization of PlaceholderConfigurerSupport that resolves ${...} placeholders within bean definition property values and @Value annotations against the current Spring Environment and its set of PropertySources.

This class is designed as a general replacement for PropertyPlaceholderConfigurer. It is used by default to support the property-placeholder element in working against the spring-context-3.1 or higher XSD; whereas, spring-context versions <= 3.0 default to PropertyPlaceholderConfigurer to ensure backward compatibility. See the spring-context XSD documentation for complete details.

Any local properties (e.g. those added via PropertiesLoaderSupport.setProperties(java.util.Properties), PropertiesLoaderSupport.setLocations(org.springframework.core.io.Resource...) et al.) are added as a PropertySource. Search precedence of local properties is based on the value of the localOverride property, which is by default false meaning that local properties are to be searched last, after all environment property sources.

See ConfigurableEnvironment and related javadocs for details on manipulating environment property sources.

Since:

3.1

Author:

Chris Beams, Juergen Hoeller

See Also:

• ConfigurableEnvironment
• PlaceholderConfigurerSupport
• PropertyPlaceholderConfigurer

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ENVIRONMENT_PROPERTIES_PROPERTY_SOURCE_NAME	"environmentProperties" is the name given to the PropertySource that wraps the environment supplied to this configurer.
static final String	LOCAL_PROPERTIES_PROPERTY_SOURCE_NAME	"localProperties" is the name given to the PropertySource for the set of merged properties supplied to this configurer.

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

DEFAULT_PLACEHOLDER_PREFIX, DEFAULT_PLACEHOLDER_SUFFIX, DEFAULT_VALUE_SEPARATOR, ignoreUnresolvablePlaceholders, nullValue, placeholderPrefix, placeholderSuffix, trimValues, valueSeparator

Fields inherited from class org.springframework.core.io.support.PropertiesLoaderSupport

localOverride, localProperties, logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
PropertySourcesPlaceholderConfigurer()

Method Summary

Modifier and Type	Method	Description
PropertySources	getAppliedPropertySources()	Return the property sources that were actually applied during post-processing.
void	postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)	Processing occurs by replacing ${...} placeholders in bean definitions by resolving each against this configurer's set of PropertySources, which includes: all environment property sources, if an Environment is present merged local properties, if any have been specified any property sources set by calling setPropertySources(org.springframework.core.env.PropertySources)
protected void	processProperties(ConfigurableListableBeanFactory beanFactory, Properties props)	Deprecated. in favor of processProperties(ConfigurableListableBeanFactory, ConfigurablePropertyResolver)
protected void	processProperties(ConfigurableListableBeanFactory beanFactoryToProcess, ConfigurablePropertyResolver propertyResolver)	Visit each bean definition in the given bean factory and attempt to replace ${...} property placeholders with values from the given properties.
void	setEnvironment(Environment environment)	PropertySources from the given Environment will be searched when replacing ${...} placeholders.
void	setPropertySources(PropertySources propertySources)	Customize the set of PropertySources to be used by this configurer.

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

doProcessProperties, setBeanFactory, setBeanName, setIgnoreUnresolvablePlaceholders, setNullValue, setPlaceholderPrefix, setPlaceholderSuffix, setTrimValues, setValueSeparator

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

convertProperties, convertProperty, convertPropertyValue, getOrder, setOrder

Methods inherited from class org.springframework.core.io.support.PropertiesLoaderSupport

loadProperties, mergeProperties, setFileEncoding, setIgnoreResourceNotFound, setLocalOverride, setLocation, setLocations, setProperties, setPropertiesArray, setPropertiesPersister

Methods inherited from class java.lang.Object

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

Field Details

LOCAL_PROPERTIES_PROPERTY_SOURCE_NAME

public static final String LOCAL_PROPERTIES_PROPERTY_SOURCE_NAME

"localProperties" is the name given to the PropertySource for the set of merged properties supplied to this configurer.

See Also:

• Constant Field Values

ENVIRONMENT_PROPERTIES_PROPERTY_SOURCE_NAME

public static final String ENVIRONMENT_PROPERTIES_PROPERTY_SOURCE_NAME

"environmentProperties" is the name given to the PropertySource that wraps the environment supplied to this configurer.

See Also:

• Constant Field Values

Constructor Details

PropertySourcesPlaceholderConfigurer

public PropertySourcesPlaceholderConfigurer()

Method Details

setPropertySources

public void setPropertySources(PropertySources propertySources)

Customize the set of PropertySources to be used by this configurer.

Setting this property indicates that environment property sources and local properties should be ignored.

See Also:

• postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)

setEnvironment

public void setEnvironment(Environment environment)

PropertySources from the given Environment will be searched when replacing ${...} placeholders.

Specified by:

setEnvironment in interface EnvironmentAware

See Also:

• setPropertySources(org.springframework.core.env.PropertySources)
• postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)

postProcessBeanFactory

public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
                            throws BeansException

Processing occurs by replacing ${...} placeholders in bean definitions by resolving each against this configurer's set of PropertySources, which includes:

• all environment property sources, if an Environment is present
• merged local properties, if any have been specified
• any property sources set by calling setPropertySources(org.springframework.core.env.PropertySources)

If setPropertySources(org.springframework.core.env.PropertySources) is called, environment and local properties will be ignored. This method is designed to give the user fine-grained control over property sources, and once set, the configurer makes no assumptions about adding additional sources.

Specified by:

postProcessBeanFactory in interface BeanFactoryPostProcessor

Overrides:

postProcessBeanFactory in class PropertyResourceConfigurer

Parameters:

beanFactory - the bean factory used by the application context

Throws:

BeansException - in case of errors

processProperties

protected void processProperties(ConfigurableListableBeanFactory beanFactoryToProcess,
 ConfigurablePropertyResolver propertyResolver)
                          throws BeansException

Visit each bean definition in the given bean factory and attempt to replace ${...} property placeholders with values from the given properties.

Throws:

BeansException

processProperties

@Deprecated
protected void processProperties(ConfigurableListableBeanFactory beanFactory,
 Properties props)

Deprecated.

in favor of processProperties(ConfigurableListableBeanFactory, ConfigurablePropertyResolver)

Implemented for compatibility with PlaceholderConfigurerSupport.

Specified by:

processProperties in class PropertyResourceConfigurer

Parameters:

beanFactory - the BeanFactory used by the application context

props - the Properties to apply

Throws:

UnsupportedOperationException - in this implementation

getAppliedPropertySources

public PropertySources getAppliedPropertySources()
                                          throws IllegalStateException

Return the property sources that were actually applied during post-processing.

Returns:

the property sources that were applied

Throws:

IllegalStateException - if the property sources have not yet been applied

Since:

4.0