package org.apache.commons.digester3.plugins;

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import org.apache.commons.digester3.Digester;

Interface for classes which can dynamically load custom plugin rules associated with a user's plugin class.

Each plugin declaration has an associated RuleLoader instance, and that instance's addRules method is invoked each time the input xml specifies that an instance of that plugged-in class is to be created.

This is an abstract class rather than an interface in order to make it possible to enhance this class in future without breaking binary compatibility; it is possible to add methods to an abstract class, but not to an interface.

Since:1.6
/** * Interface for classes which can dynamically load custom plugin rules associated with a user's plugin class. * <p> * Each plugin declaration has an associated RuleLoader instance, and that instance's addRules method is invoked each * time the input xml specifies that an instance of that plugged-in class is to be created. * <p> * This is an abstract class rather than an interface in order to make it possible to enhance this class in future * without breaking binary compatibility; it is possible to add methods to an abstract class, but not to an interface. * * @since 1.6 */
public abstract class RuleLoader {
Configures the digester with custom rules for some plugged-in class.

This method is invoked when the start of an xml tag is encountered which maps to a PluginCreateRule. Any rules added here are removed from the digester when the end of that xml tag is encountered.

Params:
  • d – The gigester has to be configured
  • path – The path where rule has to be bound
Throws:
/** * Configures the digester with custom rules for some plugged-in class. * <p> * This method is invoked when the start of an xml tag is encountered which maps to a PluginCreateRule. Any rules * added here are removed from the digester when the end of that xml tag is encountered. * * @param d The gigester has to be configured * @param path The path where rule has to be bound * @throws PluginException if any error occurs */
public abstract void addRules( Digester d, String path ) throws PluginException; }