Package org.apache.commons.configuration2.tree

A package with helper and utility classes used by hierarchical configurations.

Interface Summary

Interface	Description
ConfigurationNodeVisitor<T>	Definition of a Visitor interface for a configuration node structure.
ExpressionEngine	Definition of an interface for evaluating keys for hierarchical configurations.
InMemoryNodeModelSupport	A specialized version of the NodeModelSupport interface which allows querying an InMemoryNodeModel.
NodeHandler<T>	Definition of an interface for accessing the data of a configuration node.
NodeKeyResolver<T>	Definition of an interface which allows resolving a (property) key for different manipulating operations.
NodeMatcher<C>	An interface for matching nodes based on specific criteria.
NodeModel<T>	Definition of an interface describing a model based on a nodes structure.
NodeModelSupport<T>	An interface to be implemented by objects that support a NodeModel.
ReferenceNodeHandler	An extension of the NodeHandler interface which allows access to so-called references stored for a node.

Class Summary

Class	Description
ConfigurationNodeVisitorAdapter<T>	A simple adapter class that simplifies writing custom node visitor implementations.
DefaultConfigurationKey	A simple class that supports creation of and iteration on configuration keys supported by a DefaultExpressionEngine object.
DefaultExpressionEngine	A default implementation of the ExpressionEngine interface providing the "native" expression language for hierarchical configurations.
DefaultExpressionEngineSymbols	A class representing the various symbols that are supported in keys recognized by DefaultExpressionEngine.
DefaultExpressionEngineSymbols.Builder	A builder class for creating instances of DefaultExpressionEngineSymbols.
ImmutableNode	An immutable default implementation for configuration nodes.
ImmutableNode.Builder	A builder class for creating instances of ImmutableNode.
InMemoryNodeModel	A specialized node model implementation which operates on ImmutableNode structures.
MergeCombiner	A specialized implementation of the NodeCombiner interface that performs a merge from two passed in node hierarchies.
NodeAddData<T>	A simple data class used by ExpressionEngine to store the results of the prepareAdd() operation.
NodeCombiner	A base class for node combiner implementations.
NodeHandlerDecorator<T>	An abstract base class for decorators of a NodeHandler.
NodeSelector	A class for selecting a specific node based on a key or a set of keys.
NodeTreeWalker	A class providing different algorithms for traversing a hierarchy of configuration nodes.
NodeUpdateData<T>	A simple data class used by node models to store parameters of an update operation.
OverrideCombiner	A concrete combiner implementation that is able to construct an override combination.
QueryResult<T>	A data class representing a single query result produced by an ExpressionEngine.
TrackedNodeModel	A specialized NodeModel implementation that uses a tracked node managed by an InMemoryNodeModel object as root node.
TreeUtils	Utility methods.
UnionCombiner	A specialized implementation of the NodeCombiner interface that constructs a union from two passed in node hierarchies.

Enum Summary

Enum	Description
NodeNameMatchers	An enumeration class with several pre-defined NodeMatcher implementations based on node names.