## Uses of Interface
org.apache.commons.configuration2.interpol.Lookup

- Packages that use Lookup
  Package | Description
  --- | ---
  org.apache.commons.configuration2 | The Configuration main package.
  org.apache.commons.configuration2.builder | This package contains the implementations of configuration builder classes used to create new `Configuration` objects.
  org.apache.commons.configuration2.interpol | A package with helper classes used for interpolation (variable substitution).

- - ### Uses of Lookup in org.apache.commons.configuration2

    Classes in org.apache.commons.configuration2 that implement Lookup
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConfigurationLookup` A specialized implementation of the `Lookup` interface which uses a `Configuration` object to resolve variables.

    Method parameters in org.apache.commons.configuration2 with type arguments of type Lookup
    Modifier and Type | Method and Description
    --- | ---
    `void` | Configuration.`installInterpolator(Map<String,? extends Lookup> prefixLookups, Collection<? extends Lookup> defLookups)` Creates and installs a new `ConfigurationInterpolator` for this `Configuration` based on the passed in arguments.
    `void` | Configuration.`installInterpolator(Map<String,? extends Lookup> prefixLookups, Collection<? extends Lookup> defLookups)` Creates and installs a new `ConfigurationInterpolator` for this `Configuration` based on the passed in arguments.
    `void` | AbstractConfiguration.`installInterpolator(Map<String,? extends Lookup> prefixLookups, Collection<? extends Lookup> defLookups)` Creates and installs a new `ConfigurationInterpolator` for this `Configuration` based on the passed in arguments.
    `void` | AbstractConfiguration.`installInterpolator(Map<String,? extends Lookup> prefixLookups, Collection<? extends Lookup> defLookups)` Creates and installs a new `ConfigurationInterpolator` for this `Configuration` based on the passed in arguments.
    `void` | AbstractConfiguration.`setDefaultLookups(Collection<? extends Lookup> lookups)` Adds all `Lookup` objects in the given collection as default lookups (i.e. lookups without a variable prefix) to the `ConfigurationInterpolator` object of this configuration.
    `void` | AbstractConfiguration.`setPrefixLookups(Map<String,? extends Lookup> lookups)` Registers all `Lookup` objects in the given map at the current `ConfigurationInterpolator` of this configuration.

  - ### Uses of Lookup in org.apache.commons.configuration2.builder

    Method parameters in org.apache.commons.configuration2.builder with type arguments of type Lookup
    Modifier and Type | Method and Description
    --- | ---
    `T` | BasicBuilderProperties.`setDefaultLookups(Collection<? extends Lookup> lookups)` Adds additional default `Lookup` objects (i.e. lookups which are not associated with a specific prefix) to this configuration object.
    `BasicBuilderParameters` | BasicBuilderParameters.`setDefaultLookups(Collection<? extends Lookup> lookups)` Adds additional default `Lookup` objects (i.e. lookups which are not associated with a specific prefix) to this configuration object.
    `T` | BasicBuilderProperties.`setPrefixLookups(Map<String,? extends Lookup> lookups)` Sets additional `Lookup` objects for specific prefixes for this configuration object.
    `BasicBuilderParameters` | BasicBuilderParameters.`setPrefixLookups(Map<String,? extends Lookup> lookups)` Sets additional `Lookup` objects for specific prefixes for this configuration object.

  - ### Uses of Lookup in org.apache.commons.configuration2.interpol

    Classes in org.apache.commons.configuration2.interpol that implement Lookup
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConstantLookup` A specialized lookup implementation that allows access to constant fields of classes.
    `class` | `DummyLookup` A simple dummy `Lookup` implementation.
    `class` | `EnvironmentLookup` A specialized lookup implementation that allows access to environment variables.
    `class` | `ExprLookup` Lookup that allows expressions to be evaluated.
    `class` | `SystemPropertiesLookup` A specialized implementation of the `Lookup` interface that allows access to system properties.

    Methods in org.apache.commons.configuration2.interpol that return Lookup
    Modifier and Type | Method and Description
    --- | ---
    `protected Lookup` | ConfigurationInterpolator.`fetchLookupForPrefix(String prefix)` Obtains the lookup object for the specified prefix.
    `Lookup` | DefaultLookups.`getLookup()` Returns the standard `Lookup` instance of this kind.
    `static Lookup` | ConfigurationInterpolator.`nullSafeLookup(Lookup lookup)` Utility method for obtaining a `Lookup` object in a safe way.

    Methods in org.apache.commons.configuration2.interpol that return types with arguments of type Lookup
    Modifier and Type | Method and Description
    --- | ---
    `Collection<Lookup>` | InterpolatorSpecification.`getDefaultLookups()` Returns a collection with the default lookups.
    `List<Lookup>` | ConfigurationInterpolator.`getDefaultLookups()` Returns a collection with the default `Lookup` objects added to this `ConfigurationInterpolator`.
    `static Map<String,Lookup>` | ConfigurationInterpolator.`getDefaultPrefixLookups()` Returns a map containing the default prefix lookups.
    `Map<String,Lookup>` | ConfigurationInterpolator.`getLookups()` Returns a map with the currently registered `Lookup` objects and their prefixes.
    `Map<String,Lookup>` | InterpolatorSpecification.`getPrefixLookups()` Returns a map with prefix lookups.

    Methods in org.apache.commons.configuration2.interpol with parameters of type Lookup
    Modifier and Type | Method and Description
    --- | ---
    `void` | ConfigurationInterpolator.`addDefaultLookup(Lookup defaultLookup)` Adds a default `Lookup` object.
    `static Lookup` | ConfigurationInterpolator.`nullSafeLookup(Lookup lookup)` Utility method for obtaining a `Lookup` object in a safe way.
    `void` | ConfigurationInterpolator.`registerLookup(String prefix, Lookup lookup)` Registers the given `Lookup` object for the specified prefix at this instance.
    `boolean` | ConfigurationInterpolator.`removeDefaultLookup(Lookup lookup)` Removes the specified `Lookup` object from the list of default `Lookup`s.
    `InterpolatorSpecification.Builder` | InterpolatorSpecification.Builder.`withDefaultLookup(Lookup lookup)` Adds the given `Lookup` object to the list of default lookups.
    `InterpolatorSpecification.Builder` | InterpolatorSpecification.Builder.`withPrefixLookup(String prefix, Lookup lookup)` Adds a `Lookup` object for a given prefix.

    Method parameters in org.apache.commons.configuration2.interpol with type arguments of type Lookup
    Modifier and Type | Method and Description
    --- | ---
    `void` | ConfigurationInterpolator.`addDefaultLookups(Collection<? extends Lookup> lookups)` Adds all `Lookup` objects in the given collection as default lookups.
    `void` | ConfigurationInterpolator.`registerLookups(Map<String,? extends Lookup> lookups)` Registers all `Lookup` objects in the given map with their prefixes at this `ConfigurationInterpolator`.
    `InterpolatorSpecification.Builder` | InterpolatorSpecification.Builder.`withDefaultLookups(Collection<? extends Lookup> lookups)` Adds the content of the given collection to the default lookups managed by this builder.
    `InterpolatorSpecification.Builder` | InterpolatorSpecification.Builder.`withPrefixLookups(Map<String,? extends Lookup> lookups)` Adds the content of the given map to the prefix lookups managed by this builder.

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