org.apache.commons.digester.plugins.strategies

Class FinderFromResource

public class FinderFromResource extends RuleFinder

A rule-finding algorithm which expects the user to specify a resource name (ie a file in the classpath). The file is expected to contain Digester rules in xmlrules format.

Since: 1.6

Field Summary
static StringDFLT_RESOURCE_ATTR
Name of xml attribute on the plugin declaration which is used to configure rule-loading for that declaration.
Constructor Summary
FinderFromResource()
Constructor.
FinderFromResource(String resourceAttr)
Method Summary
RuleLoaderfindLoader(Digester d, Class pluginClass, Properties p)
If there exists a property with the name matching constructor param resourceAttr, then load that file, run it through the xmlrules module and return an object encapsulating those rules.
static RuleLoaderloadRules(Digester d, Class pluginClass, InputStream is, String resourceName)
Open the specified resource file (ie a file in the classpath, including being within a jar in the classpath), run it through the xmlrules module and return an object encapsulating those rules.

Field Detail

DFLT_RESOURCE_ATTR

public static String DFLT_RESOURCE_ATTR
Name of xml attribute on the plugin declaration which is used to configure rule-loading for that declaration.

Constructor Detail

FinderFromResource

public FinderFromResource()
Constructor.

FinderFromResource

public FinderFromResource(String resourceAttr)
See FinderFromResource.

Method Detail

findLoader

public RuleLoader findLoader(Digester d, Class pluginClass, Properties p)
If there exists a property with the name matching constructor param resourceAttr, then load that file, run it through the xmlrules module and return an object encapsulating those rules.

If there is no matching property provided, then just return null.

The returned object (when non-null) will add the selected rules to the digester whenever its addRules method is invoked.

loadRules

public static RuleLoader loadRules(Digester d, Class pluginClass, InputStream is, String resourceName)
Open the specified resource file (ie a file in the classpath, including being within a jar in the classpath), run it through the xmlrules module and return an object encapsulating those rules.

Parameters: d is the digester into which rules will eventually be loaded. pluginClass is the class whose xml params the rules are parsing. is is where the xmlrules will be read from, and must be non-null. resourceName is a string describing the source of the xmlrules, for use in generating error messages.

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