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## Package org.apache.commons.configuration

The Configuration main package.

See:
Description

Interface Summary
Configuration | The main Configuration interface.
ConfigurationBuilder | Definition of an interface for objects that can create a configuration.
ConfigurationComparator | Comparator for configurations interface.
FileConfiguration | A persistent configuration loaded and saved to a file.
FileOptionsProvider | Some FileSystems allow options to be passed on File operations.
FileSystemBased | Interface used to install or locate the FileSystem
PropertiesConfiguration.IOFactory | Definition of an interface that allows customization of read and write operations.

Class Summary
AbstractConfiguration | Abstract configuration class.
AbstractFileConfiguration | Partial implementation of the `FileConfiguration` interface.
AbstractHierarchicalFileConfiguration | Base class for implementing file based hierarchical configurations.
BaseConfiguration | Basic configuration class.
BaseConfigurationXMLReader | A specialized SAX2 XML parser that processes configuration objects.
CombinedConfiguration | A hierarchical composite configuration class.
CompositeConfiguration | `CompositeConfiguration` allows you to add multiple `Configuration` objects to an aggregated configuration.
ConfigurationConverter | Configuration converter.
ConfigurationFactory | Deprecated. Use `DefaultConfigurationBuilder` instead; this class provides the same features as ConfigurationFactory plus some more; it can also process the same configuration definition files.
ConfigurationFactory.AdditionalConfigurationData | A simple data class that holds all information about a configuration from the `<additional>` section.
ConfigurationFactory.ConfigurationBuilder | An internally used helper class for constructing the composite configuration object.
ConfigurationKey | Deprecated. Use `DefaultConfigurationKey` instead.
ConfigurationMap | The `ConfigurationMap` wraps a configuration-collection `Configuration` instance to provide a `Map` interface.
ConfigurationUtils | Miscellaneous utility methods for configurations.
ConfigurationXMLReader | A base class for "faked" `XMLReader` classes that transform a configuration object in a set of SAX parsing events.
DatabaseConfiguration | Configuration stored in a database.
DataConfiguration | Decorator providing additional getters for any Configuration.
DefaultConfigurationBuilder | A factory class that creates a composite configuration from an XML based configuration definition file.
DefaultConfigurationBuilder.ConfigurationDeclaration | A specialized `BeanDeclaration` implementation that represents the declaration of a configuration source.
DefaultConfigurationBuilder.ConfigurationProvider | A base class for creating and initializing configuration sources.
DefaultConfigurationBuilder.FileConfigurationProvider | A specialized provider implementation that deals with file based configurations.
DefaultConfigurationBuilder.XMLConfigurationProvider | A specialized configuration provider for XML configurations.
DefaultFileSystem | FileSystem that uses java.io.File or HttpClient
DynamicCombinedConfiguration | DynamicCombinedConfiguration allows a set of CombinedConfigurations to be used.
EnvironmentConfiguration | A Configuration implementation that reads the platform specific environment variables using the map returned by `System.getenv()`.
FileSystem | Abstract layer to allow various types of file systems.
HierarchicalConfiguration | A specialized configuration class that extends its base class by the ability of keeping more structure in the stored properties.
HierarchicalConfiguration.BuilderVisitor | A specialized visitor base class that can be used for storing the tree of configuration nodes.
HierarchicalConfiguration.Node | A data class for storing (hierarchical) property information.
HierarchicalConfiguration.NodeVisitor | Definition of a visitor class for traversing a node and all of its children.
HierarchicalConfigurationXMLReader | A specialized SAX2 XML parser that "parses" hierarchical configuration objects.
HierarchicalINIConfiguration | A specialized hierarchical configuration implementation for parsing ini files.
HierarchicalReloadableConfiguration | A base class for hierarchical configurations with specific reloading requirements.
HierarchicalXMLConfiguration | Deprecated. This class is deprecated.
INIConfiguration | Deprecated. This class has been replaced by HierarchicalINIConfiguration, which provides a superset of the functionality offered by this class.
JNDIConfiguration | This Configuration class allows you to interface with a JNDI datasource.
Lock | A simple class acting as lock.
MapConfiguration | A Map based Configuration.
MultiFileHierarchicalConfiguration | This class provides access to multiple configuration files that reside in a location that can be specified by a pattern allowing applications to be multi-tenant.
PatternSubtreeConfigurationWrapper | Wraps a HierarchicalConfiguration and allows subtrees to be access via a configured path with replaceable tokens derived from the ConfigurationInterpolator.
PropertiesConfiguration | This is the "classic" Properties loader which loads the values from a single or multiple files (which can be chained with "include =".
PropertiesConfiguration.DefaultIOFactory | A default implementation of the `IOFactory` interface.
PropertiesConfiguration.PropertiesReader | This class is used to read properties lines.
PropertiesConfiguration.PropertiesWriter | This class is used to write properties lines.
PropertiesConfigurationLayout | A helper class used by `PropertiesConfiguration` to keep the layout of a properties file.
PropertyConverter | A utility class to convert the configuration properties into any type.
StrictConfigurationComparator | Strict comparator for configurations.
SubnodeConfiguration | A specialized hierarchical configuration class that wraps a single node of its parent configuration.
SubsetConfiguration | A subset of another configuration.
SystemConfiguration | A configuration based on the system properties.
VFSFileSystem | FileSystem that uses Commons VFS
XMLConfiguration | A specialized hierarchical configuration class that is able to parse XML documents.
XMLPropertiesConfiguration | This configuration implements the XML properties format introduced in Java 5.0, see http://java.sun.com/j2se/1.5.0/docs/api/java/util/Properties.html.

Exception Summary
ConfigurationException | Any exception that occurs while initializing a Configuration object.
ConfigurationRuntimeException | A configuration related runtime exception.
ConversionException | Exception thrown when a property is incompatible with the type requested.

## Package org.apache.commons.configuration Description

The Configuration main package. It contains the definition of the `Configuration` interface and frequently used implementations like `PropertiesConfiguration` (dealing with `.properties` files) or `XMLConfiguration` that can load XML documents.

$Id: package.html 439648 2006-09-02 20:42:10Z oheger $

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