Package org.apache.commons.configuration2.builder.combined

# Class CombinedConfigurationBuilderProvider

java.lang.Object
org.apache.commons.configuration2.builder.combined.BaseConfigurationBuilderProvider
org.apache.commons.configuration2.builder.combined.CombinedConfigurationBuilderProvider

All Implemented Interfaces:
  `ConfigurationBuilderProvider`

public class CombinedConfigurationBuilderProvider extends BaseConfigurationBuilderProvider

A specialized `ConfigurationBuilderProvider` implementation which deals with combined configuration builders.

This class is used to support `<configuration>` elements in configuration definition files. The provider creates another `CombinedConfigurationBuilder` which inherits some of the properties from its parent builder.

Since:
  2.0

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CombinedConfigurationBuilderProvider()`
  Creates a new instance of `CombinedConfigurationBuilderProvider`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected BasicConfigurationBuilder<? extends Configuration>`
  `createBuilder(ConfigurationDeclaration decl, Collection<BuilderParameters> params)`
  Creates a new, uninitialized instance of the builder class managed by this provider.
  `protected void`
  `initializeParameterObjects(ConfigurationDeclaration decl, Collection<BuilderParameters> params)`
  Initializes the parameter objects with data stored in the current bean declaration.

  ### Methods inherited from class org.apache.commons.configuration2.builder.combined.BaseConfigurationBuilderProvider

  `configureBuilder, createParameterObjects, determineBuilderClass, determineConfigurationClass, getBuilderClass, getConfigurationBuilder, getConfigurationClass, getParameterClasses, getReloadingBuilderClass, inheritParentBuilderProperties, isAllowFailOnInit`

  ### Methods inherited from class java.lang.Object

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

- ## Constructor Details

  - ### CombinedConfigurationBuilderProvider

    public CombinedConfigurationBuilderProvider()
    Creates a new instance of `CombinedConfigurationBuilderProvider`.

- ## Method Details

  - ### createBuilder

    protected BasicConfigurationBuilder<? extends Configuration> createBuilder(ConfigurationDeclaration decl, Collection<BuilderParameters> params) throws Exception
    Creates a new, uninitialized instance of the builder class managed by this provider. This implementation determines the builder class to be used by delegating to `determineBuilderClass()`. It then calls the constructor expecting the configuration class, the map with properties, and theallowFailOnInit flag. This implementation creates the result builder object directly, not using reflection. (The reflection-based approach of the base class does not work here because a combined configuration builder has constructors with a different signature.) It also performs some additional initializations.
    Overrides:
      `createBuilder` in class `BaseConfigurationBuilderProvider`
    Parameters:
      `decl` - the current `ConfigurationDeclaration`
      `params` - initialization parameters for the new builder object
    Returns:
      the newly created builder instance
    Throws:
      `Exception` - if an error occurs

  - ### initializeParameterObjects

    protected void initializeParameterObjects(ConfigurationDeclaration decl, Collection<BuilderParameters> params) throws Exception
    Initializes the parameter objects with data stored in the current bean declaration. This method is called before the newly created builder instance is configured with the parameter objects. It maps attributes of the bean declaration to properties of parameter objects. In addition, it invokes the parent `CombinedConfigurationBuilder` so that the parameters object can inherit properties already defined for this builder. This implementation pre-fills basic parameters from the basic properties of the parent builder's result configuration.
    Overrides:
      `initializeParameterObjects` in class `BaseConfigurationBuilderProvider`
    Parameters:
      `decl` - the current `ConfigurationDeclaration`
      `params` - the collection with (uninitialized) parameter objects
    Throws:
      `Exception` - if an error occurs