Package org.apache.commons.configuration2

# Class BaseConfiguration

java.lang.Object
org.apache.commons.configuration2.event.BaseEventSource
org.apache.commons.configuration2.AbstractConfiguration
org.apache.commons.configuration2.BaseConfiguration

All Implemented Interfaces:
  `Cloneable`, `Configuration`, `EventSource`, `ImmutableConfiguration`, `SynchronizerSupport`

Direct Known Subclasses:
  `PropertiesConfiguration`, `XMLPropertiesConfiguration`

public class BaseConfiguration extends AbstractConfiguration implements Cloneable
Basic configuration class. Stores the configuration data but does not provide any load or save functions. If you want to load your Configuration from a file use PropertiesConfiguration or XmlConfiguration. This class extends normal Java properties by adding the possibility to use the same key many times concatenating the value strings instead of overwriting them.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `BaseConfiguration()`
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected void`
  `addPropertyDirect(String key, Object value)`
  Adds a key/value pair to the map.
  `protected void`
  `clearInternal()`
  Clears the whole configuration.
  `protected void`
  `clearPropertyDirect(String key)`
  Clear a property in the configuration.
  `Object`
  `clone()`
  Creates a copy of this object.
  `protected boolean`
  `containsKeyInternal(String key)`
  check if the configuration contains the key
  `protected boolean`
  `containsValueInternal(Object value)`
  Tests whether this configuration contains one or more matches to this value.
  `protected Iterator<String>`
  `getKeysInternal()`
  Gets the list of the keys contained in the configuration repository.
  `protected Object`
  `getPropertyInternal(String key)`
  Reads property from underlying map.
  `protected boolean`
  `isEmptyInternal()`
  Check if the configuration is empty
  `protected int`
  `sizeInternal()`
  Actually calculates the size of this configuration.

  ### Methods inherited from class org.apache.commons.configuration2.AbstractConfiguration

  `addErrorLogListener, addProperty, addPropertyInternal, append, beginRead, beginWrite, clear, clearProperty, cloneInterpolator, contains, containsKey, containsValue, copy, endRead, endWrite, get, get, getArray, getArray, getBigDecimal, getBigDecimal, getBigInteger, getBigInteger, getBoolean, getBoolean, getBoolean, getByte, getByte, getByte, getCollection, getCollection, getConfigurationDecoder, getConversionHandler, getDouble, getDouble, getDouble, getDuration, getDuration, getEncodedString, getEncodedString, getFloat, getFloat, getFloat, getInt, getInt, getInteger, getInterpolator, getKeys, getKeys, getKeys, getKeysInternal, getKeysInternal, getList, getList, getList, getList, getListDelimiterHandler, getLogger, getLong, getLong, getLong, getProperties, getProperties, getProperty, getShort, getShort, getShort, getString, getString, getStringArray, getSynchronizer, immutableSubset, initLogger, installInterpolator, interpolate, interpolate, interpolatedConfiguration, isEmpty, isScalarValue, isThrowExceptionOnMissing, lock, setConfigurationDecoder, setConversionHandler, setDefaultLookups, setInterpolator, setListDelimiterHandler, setLogger, setParentInterpolator, setPrefixLookups, setProperty, setPropertyInternal, setSynchronizer, setThrowExceptionOnMissing, size, subset, unlock`

  ### Methods inherited from class org.apache.commons.configuration2.event.BaseEventSource

  `addEventListener, clearErrorListeners, clearEventListeners, copyEventListeners, createErrorEvent, createEvent, fireError, fireEvent, getEventListenerRegistrations, getEventListeners, isDetailEvents, removeEventListener, setDetailEvents`

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

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

  ### Methods inherited from interface org.apache.commons.configuration2.ImmutableConfiguration

  `entrySet, forEach, getEnum, getEnum`

- ## Constructor Details

  - ### BaseConfiguration

    public BaseConfiguration()
    Constructs a new instance.

- ## Method Details

  - ### addPropertyDirect

    protected void addPropertyDirect(String key, Object value)
    Adds a key/value pair to the map. This routine does no magic morphing. It ensures the keylist is maintained
    Specified by:
      `addPropertyDirect` in class `AbstractConfiguration`
    Parameters:
      `key` - key to use for mapping
      `value` - object to store

  - ### clearInternal

    protected void clearInternal()
    Description copied from class: `AbstractConfiguration`
    Clears the whole configuration. This method is called by `clear()` after some preparations have been made. This base implementation uses the iterator provided by `getKeys()` to remove every single property. Subclasses should override this method if there is a more efficient way of clearing the configuration.
    Overrides:
      `clearInternal` in class `AbstractConfiguration`

  - ### clearPropertyDirect

    protected void clearPropertyDirect(String key)
    Clear a property in the configuration.
    Specified by:
      `clearPropertyDirect` in class `AbstractConfiguration`
    Parameters:
      `key` - the key to remove along with corresponding value.

  - ### clone

    public Object clone()
    Creates a copy of this object. This implementation will create a deep clone, i.e. the map that stores the properties is cloned, too. So changes performed at the copy won't affect the original and vice versa.
    Overrides:
      `clone` in class `BaseEventSource`
    Returns:
      the copy
    Since:
      1.3

  - ### containsKeyInternal

    protected boolean containsKeyInternal(String key)
    check if the configuration contains the key
    Specified by:
      `containsKeyInternal` in class `AbstractConfiguration`
    Parameters:
      `key` - the configuration key
    Returns:
      `true` if Configuration contain given key, `false` otherwise.

  - ### containsValueInternal

    protected boolean containsValueInternal(Object value)
    Tests whether this configuration contains one or more matches to this value. This operation stops at first match but may be more expensive than the containsKey method.
    Specified by:
      `containsValueInternal` in class `AbstractConfiguration`
    Parameters:
      `value` - the value in question
    Returns:
      `true` if and only if some key maps to the `value` argument in this configuration as determined by the `equals` method; `false` otherwise.
    Since:
      2.11.0

  - ### getKeysInternal

    protected Iterator<String> getKeysInternal()
    Gets the list of the keys contained in the configuration repository.
    Specified by:
      `getKeysInternal` in class `AbstractConfiguration`
    Returns:
      An Iterator.

  - ### getPropertyInternal

    protected Object getPropertyInternal(String key)
    Reads property from underlying map.
    Specified by:
      `getPropertyInternal` in class `AbstractConfiguration`
    Parameters:
      `key` - key to use for mapping
    Returns:
      object associated with the given configuration key.

  - ### isEmptyInternal

    protected boolean isEmptyInternal()
    Check if the configuration is empty
    Specified by:
      `isEmptyInternal` in class `AbstractConfiguration`
    Returns:
      `true` if Configuration is empty, `false` otherwise.

  - ### sizeInternal

    protected int sizeInternal()
    Actually calculates the size of this configuration. This method is called by `size()` with a read lock held. The base implementation provided here calculates the size based on the iterator returned by `getKeys()`. Sub classes which can determine the size in a more efficient way should override this method. This implementation obtains the size directly from the map used as data store. So this is a rather efficient implementation.
    Overrides:
      `sizeInternal` in class `AbstractConfiguration`
    Returns:
      the size of this configuration (i.e. the number of keys)