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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.web.context.support

Source Cross Reference Class Diagram Java Document (Java Doc)

org.springframework.beans.factory.config .PropertyPlaceholderConfigurer

org.springframework.web.context.support .ServletContextPropertyPlaceholderConfigurer

ServletContextPropertyPlaceholderConfigurer

public class ServletContextPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer implements ServletContextAware(Code)

Subclass of PropertyPlaceholderConfigurer that resolves placeholders as ServletContext init parameters (that is, web.xml context-param entries).

Can be combined with "locations" and/or "properties" values in addition to web.xml context-params. Alternatively, can be defined without local properties, to resolve all placeholders as web.xml context-params (or JVM system properties).

If a placeholder could not be resolved against the provided local properties within the application, this configurer will fall back to ServletContext parameters. Can also be configured to let ServletContext init parameters override local properties (contextOverride=true).

Optionally supports searching for ServletContext attributes: If turned on, an otherwise unresolvable placeholder will matched against the corresponding ServletContext attribute, using its stringified value if found. This can be used to feed dynamic values into Spring's placeholder resolution.

If not running within a WebApplicationContext (or any other context that is able to satisfy the ServletContextAware callback), this class will behave like the default PropertyPlaceholderConfigurer. This allows for keeping ServletContextPropertyPlaceholderConfigurer definitions in test suites.
author:
   Juergen Hoeller
since:
   1.1.4
See Also:   ServletContextPropertyPlaceholderConfigurer.setLocations
See Also:   ServletContextPropertyPlaceholderConfigurer.setProperties
See Also:   ServletContextPropertyPlaceholderConfigurer.setSystemPropertiesModeName
See Also:   ServletContextPropertyPlaceholderConfigurer.setContextOverride
See Also:   ServletContextPropertyPlaceholderConfigurer.setSearchContextAttributes
See Also:   javax.servlet.ServletContext.getInitParameter(String)
See Also:   javax.servlet.ServletContext.getAttribute(String)

Method Summary
protected String	resolvePlaceholder(String placeholder, Properties props)
protected String	resolvePlaceholder(String placeholder, ServletContext servletContext, boolean searchContextAttributes) Resolves the given placeholder using the init parameters and optionally also the attributes of the given ServletContext. Default implementation checks ServletContext attributes before init parameters.
public void	setContextOverride(boolean contextOverride) Set whether ServletContext init parameters (and optionally also ServletContext attributes) should override local properties within the application.
public void	setSearchContextAttributes(boolean searchContextAttributes) Set whether to search for matching a ServletContext attribute before checking a ServletContext init parameter.
public void	setServletContext(ServletContext servletContext) Set the ServletContext to resolve placeholders against.

Method Detail

resolvePlaceholder
protected String resolvePlaceholder(String placeholder, Properties props)(Code)

resolvePlaceholder
protected String resolvePlaceholder(String placeholder, ServletContext servletContext, boolean searchContextAttributes)(Code)
	Resolves the given placeholder using the init parameters and optionally also the attributes of the given ServletContext. Default implementation checks ServletContext attributes before init parameters. Can be overridden to customize this behavior, potentially also applying specific naming patterns for parameters and/or attributes (instead of using the exact placeholder name). Parameters: placeholder - the placeholder to resolve Parameters: servletContext - the ServletContext to check Parameters: searchContextAttributes - whether to search for a matchingServletContext attribute the resolved value, of null if none See Also: javax.servlet.ServletContext.getInitParameter(String) See Also: javax.servlet.ServletContext.getAttribute(String)

setContextOverride
public void setContextOverride(boolean contextOverride)(Code)
	Set whether ServletContext init parameters (and optionally also ServletContext attributes) should override local properties within the application. Default is "false": ServletContext settings serve as fallback. Note that system properties will still override ServletContext settings, if the system properties mode is set to "SYSTEM_PROPERTIES_MODE_OVERRIDE". See Also: ServletContextPropertyPlaceholderConfigurer.setSearchContextAttributes See Also: ServletContextPropertyPlaceholderConfigurer.setSystemPropertiesModeName See Also: ServletContextPropertyPlaceholderConfigurer.SYSTEM_PROPERTIES_MODE_OVERRIDE

setSearchContextAttributes
public void setSearchContextAttributes(boolean searchContextAttributes)(Code)
	Set whether to search for matching a ServletContext attribute before checking a ServletContext init parameter. Default is "false": only checking init parameters. If turned on, the configurer will look for a ServletContext attribute with the same name as the placeholder, and use its stringified value if found. Exposure of such ServletContext attributes can be used to dynamically override init parameters defined in `web.xml`, for example in a custom context listener. See Also: javax.servlet.ServletContext.getInitParameter(String) See Also: javax.servlet.ServletContext.getAttribute(String)

setServletContext
public void setServletContext(ServletContext servletContext)(Code)
	Set the ServletContext to resolve placeholders against. Will be auto-populated when running in a WebApplicationContext. If not set, this configurer will simply not resolve placeholders against the ServletContext: It will effectively behave like a plain PropertyPlaceholderConfigurer in such a scenario.

Fields inherited from org.springframework.beans.factory.config.PropertyPlaceholderConfigurer

final public static String DEFAULT_PLACEHOLDER_PREFIX(Code)(Java Doc)
final public static String DEFAULT_PLACEHOLDER_SUFFIX(Code)(Java Doc)
final public static int SYSTEM_PROPERTIES_MODE_FALLBACK(Code)(Java Doc)
final public static int SYSTEM_PROPERTIES_MODE_NEVER(Code)(Java Doc)
final public static int SYSTEM_PROPERTIES_MODE_OVERRIDE(Code)(Java Doc)

Methods inherited from org.springframework.beans.factory.config.PropertyPlaceholderConfigurer

protected String parseStringValue(String strVal, Properties props, Set visitedPlaceholders) throws BeanDefinitionStoreException(Code)(Java Doc)
protected void processProperties(ConfigurableListableBeanFactory beanFactoryToProcess, Properties props) throws BeansException(Code)(Java Doc)
protected String resolvePlaceholder(String placeholder, Properties props, int systemPropertiesMode)(Code)(Java Doc)
protected String resolvePlaceholder(String placeholder, Properties props)(Code)(Java Doc)
protected String resolveSystemProperty(String key)(Code)(Java Doc)
public void setBeanFactory(BeanFactory beanFactory)(Code)(Java Doc)
public void setBeanName(String beanName)(Code)(Java Doc)
public void setIgnoreUnresolvablePlaceholders(boolean ignoreUnresolvablePlaceholders)(Code)(Java Doc)
public void setPlaceholderPrefix(String placeholderPrefix)(Code)(Java Doc)
public void setPlaceholderSuffix(String placeholderSuffix)(Code)(Java Doc)
public void setSearchSystemEnvironment(boolean searchSystemEnvironment)(Code)(Java Doc)
public void setSystemPropertiesMode(int systemPropertiesMode)(Code)(Java Doc)
public void setSystemPropertiesModeName(String constantName) throws IllegalArgumentException(Code)(Java Doc)

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