org.apache.commons.configuration
Class AbstractConfiguration

java.lang.Object
  org.apache.commons.configuration.event.EventSource
      org.apache.commons.configuration.AbstractConfiguration

All Implemented Interfaces:

Configuration

Direct Known Subclasses:

AppletConfiguration, BaseConfiguration, CompositeConfiguration, DatabaseConfiguration, DataConfiguration, EnvironmentConfiguration, HierarchicalConfiguration, JNDIConfiguration, MapConfiguration, ServletConfiguration, ServletContextConfiguration, ServletFilterConfiguration, ServletRequestConfiguration, SubsetConfiguration

public abstract class AbstractConfiguration
extends EventSource
implements Configuration

Abstract configuration class. Provides basic functionality but does not store any data.

If you want to write your own Configuration class then you should implement only abstract methods from this class. A lot of functionality needed by typical implementations of the Configuration interface is already provided by this base class. Following is a list of features implemented here:

• Data conversion support. The various data types required by the Configuration interface are already handled by this base class. A concrete sub class only needs to provide a generic getProperty() method.
• Support for variable interpolation. Property values containing special variable tokens (like ${var}) will be replaced by their corresponding values.
• Support for string lists. The values of properties to be added to this configuration are checked whether they contain a list delimiter character. If this is the case and if list splitting is enabled, the string is split and multiple values are added for this property. (With the setListDelimiter() method the delimiter character can be specified; per default a comma is used. The setDelimiterParsingDisabled() method can be used to disable list splitting completely.)
• Allows to specify how missing properties are treated. Per default the get methods returning an object will return null if the searched property key is not found (and no default value is provided). With the setThrowExceptionOnMissing() method this behavior can be changed to throw an exception when a requested property cannot be found.
• Basic event support. Whenever this configuration is modified registered event listeners are notified. Refer to the various EVENT_XXX constants to get an impression about which event types are supported.

Version:

$Id: AbstractConfiguration.java 589138 2007-10-27 15:41:13Z oheger $

Author:

Konstantin Shaposhnikov , Oliver Heger, Henning P. Schmiedehausen

Field Summary

protected static String	END_TOKEN end token
static int	EVENT_ADD_PROPERTY Constant for the add property event type.
static int	EVENT_CLEAR Constant for the clear configuration event type.
static int	EVENT_CLEAR_PROPERTY Constant for the clear property event type.
static int	EVENT_READ_PROPERTY Constant for the get property event type.
static int	EVENT_SET_PROPERTY Constant for the set property event type.
protected static String	START_TOKEN start token

Constructor Summary

AbstractConfiguration()
Creates a new instance of AbstractConfiguration.

Method Summary

void	addErrorLogListener() Adds a special ConfigurationErrorListener object to this configuration that will log all internal errors.
void	addProperty(String key, Object value) Add a property to the configuration.
protected abstract void	addPropertyDirect(String key, Object value) Adds a key/value pair to the Configuration.
void	append(Configuration c) Appends the content of the specified configuration to this configuration.
void	clear() Remove all properties from the configuration.
void	clearProperty(String key) Removes the specified property from this configuration.
protected void	clearPropertyDirect(String key) Removes the specified property from this configuration.
void	copy(Configuration c) Copies the content of the specified configuration into this configuration.
protected ConfigurationInterpolator	createInterpolator() Creates the interpolator object that is responsible for variable interpolation.
BigDecimal	getBigDecimal(String key) Get a BigDecimal associated with the given configuration key.
BigDecimal	getBigDecimal(String key, BigDecimal defaultValue) Get a BigDecimal associated with the given configuration key.
BigInteger	getBigInteger(String key) Get a BigInteger associated with the given configuration key.
BigInteger	getBigInteger(String key, BigInteger defaultValue) Get a BigInteger associated with the given configuration key.
boolean	getBoolean(String key) Get a boolean associated with the given configuration key.
boolean	getBoolean(String key, boolean defaultValue) Get a boolean associated with the given configuration key.
Boolean	getBoolean(String key, Boolean defaultValue) Obtains the value of the specified key and tries to convert it into a Boolean object.
byte	getByte(String key) Get a byte associated with the given configuration key.
byte	getByte(String key, byte defaultValue) Get a byte associated with the given configuration key.
Byte	getByte(String key, Byte defaultValue) Get a Byte associated with the given configuration key.
static char	getDefaultListDelimiter() Retrieve the current delimiter.
static char	getDelimiter() Deprecated. Use AbstractConfiguration.getDefaultListDelimiter() instead
double	getDouble(String key) Get a double associated with the given configuration key.
double	getDouble(String key, double defaultValue) Get a double associated with the given configuration key.
Double	getDouble(String key, Double defaultValue) Get a Double associated with the given configuration key.
float	getFloat(String key) Get a float associated with the given configuration key.
float	getFloat(String key, float defaultValue) Get a float associated with the given configuration key.
Float	getFloat(String key, Float defaultValue) Get a Float associated with the given configuration key.
int	getInt(String key) Get a int associated with the given configuration key.
int	getInt(String key, int defaultValue) Get a int associated with the given configuration key.
Integer	getInteger(String key, Integer defaultValue) Get an Integer associated with the given configuration key.
ConfigurationInterpolator	getInterpolator() Returns the ConfigurationInterpolator object that manages the lookup objects for resolving variables.
Iterator	getKeys(String prefix) Get the list of the keys contained in the configuration that match the specified prefix.
List	getList(String key) Get a List of strings associated with the given configuration key.
List	getList(String key, List defaultValue) Get a List of strings associated with the given configuration key.
char	getListDelimiter() Retrieve the delimiter for this configuration.
org.apache.commons.logging.Log	getLogger() Returns the logger used by this configuration object.
long	getLong(String key) Get a long associated with the given configuration key.
long	getLong(String key, long defaultValue) Get a long associated with the given configuration key.
Long	getLong(String key, Long defaultValue) Get a Long associated with the given configuration key.
Properties	getProperties(String key) Get a list of properties associated with the given configuration key.
Properties	getProperties(String key, Properties defaults) Get a list of properties associated with the given configuration key.
short	getShort(String key) Get a short associated with the given configuration key.
short	getShort(String key, short defaultValue) Get a short associated with the given configuration key.
Short	getShort(String key, Short defaultValue) Get a Short associated with the given configuration key.
String	getString(String key) Get a string associated with the given configuration key.
String	getString(String key, String defaultValue) Get a string associated with the given configuration key.
String[]	getStringArray(String key) Get an array of strings associated with the given configuration key.
StrSubstitutor	getSubstitutor() Returns the object that is responsible for variable interpolation.
protected Object	interpolate(Object value) Returns the interpolated value.
protected String	interpolate(String base) interpolate key names to handle ${key} stuff
Configuration	interpolatedConfiguration() Returns a configuration with the same content as this configuration, but with all variables replaced by their actual values.
protected String	interpolateHelper(String base, List priorVariables) Deprecated. Interpolation is now handled by PropertyConverter; this method will no longer be called
boolean	isDelimiterParsingDisabled() Determine if this configuration is using delimiters when parsing property values to convert them to lists of values.
boolean	isThrowExceptionOnMissing() Returns true if missing values throw Exceptions.
protected Object	resolveContainerStore(String key) Returns an object from the store described by the key.
static void	setDefaultListDelimiter(char delimiter) For configurations extending AbstractConfiguration, allow them to change the listDelimiter from the default comma (",").
static void	setDelimiter(char delimiter) Deprecated. Use AbstractConfiguration.setDefaultListDelimiter(char) instead
void	setDelimiterParsingDisabled(boolean delimiterParsingDisabled) Set whether this configuration should use delimiters when parsing property values to convert them to lists of values.
void	setListDelimiter(char listDelimiter) Change the list delimiter for this configuration.
void	setLogger(org.apache.commons.logging.Log log) Allows to set the logger to be used by this configuration object.
void	setProperty(String key, Object value) Set a property, this will replace any previously set values.
void	setThrowExceptionOnMissing(boolean throwExceptionOnMissing) Allows to set the throwExceptionOnMissing flag.
Configuration	subset(String prefix) Return a decorator Configuration containing every key from the current Configuration that starts with the specified prefix.

Methods inherited from class org.apache.commons.configuration.event.EventSource

addConfigurationListener, addErrorListener, clearConfigurationListeners, clearErrorListeners, clone, createErrorEvent, createEvent, fireError, fireEvent, getConfigurationListeners, getErrorListeners, isDetailEvents, removeConfigurationListener, removeErrorListener, 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.configuration.Configuration

containsKey, getKeys, getProperty, isEmpty

Field Detail

EVENT_ADD_PROPERTY

public static final int EVENT_ADD_PROPERTY

Constant for the add property event type.

Since:

1.3

See Also:

Constant Field Values

EVENT_CLEAR_PROPERTY

public static final int EVENT_CLEAR_PROPERTY

Constant for the clear property event type.

Since:

1.3

See Also:

Constant Field Values

EVENT_SET_PROPERTY

public static final int EVENT_SET_PROPERTY

Constant for the set property event type.

Since:

1.3

See Also:

Constant Field Values

EVENT_CLEAR

public static final int EVENT_CLEAR

Constant for the clear configuration event type.

Since:

1.3

See Also:

Constant Field Values

EVENT_READ_PROPERTY

public static final int EVENT_READ_PROPERTY

Constant for the get property event type. This event type is used for error events.

Since:

1.4

See Also:

Constant Field Values

START_TOKEN

protected static final String START_TOKEN

start token

See Also:

Constant Field Values

END_TOKEN

protected static final String END_TOKEN

end token

See Also:

Constant Field Values

Constructor Detail

AbstractConfiguration

public AbstractConfiguration()

Creates a new instance of AbstractConfiguration.

Method Detail

setDefaultListDelimiter

public static void setDefaultListDelimiter(char delimiter)

For configurations extending AbstractConfiguration, allow them to change the listDelimiter from the default comma (","). This value will be used only when creating new configurations. Those already created will not be affected by this change

Parameters:

delimiter - The new listDelimiter

setDelimiter

public static void setDelimiter(char delimiter)

Deprecated. Use AbstractConfiguration.setDefaultListDelimiter(char) instead

Sets the default list delimiter.

Parameters:

delimiter - the delimiter character

getDefaultListDelimiter

public static char getDefaultListDelimiter()

Retrieve the current delimiter. By default this is a comma (",").

Returns:

The delimiter in use

getDelimiter

public static char getDelimiter()

Deprecated. Use AbstractConfiguration.getDefaultListDelimiter() instead

Returns the default list delimiter.

Returns:

the default list delimiter

setListDelimiter

public void setListDelimiter(char listDelimiter)

Change the list delimiter for this configuration. Note: this change will only be effective for new parsings. If you want it to take effect for all loaded properties use the no arg constructor and call this method before setting the source.

Parameters:

listDelimiter - The new listDelimiter

getListDelimiter

public char getListDelimiter()

Retrieve the delimiter for this configuration. The default is the value of defaultListDelimiter.

Returns:

The listDelimiter in use

isDelimiterParsingDisabled

public boolean isDelimiterParsingDisabled()

Determine if this configuration is using delimiters when parsing property values to convert them to lists of values. Defaults to false

Returns:

true if delimiters are not being used

setDelimiterParsingDisabled

public void setDelimiterParsingDisabled(boolean delimiterParsingDisabled)

Set whether this configuration should use delimiters when parsing property values to convert them to lists of values. By default delimiter parsing is enabled Note: this change will only be effective for new parsings. If you want it to take effect for all loaded properties use the no arg constructor and call this method before setting source.

Parameters:

delimiterParsingDisabled - a flag whether delimiter parsing should be disabled

setThrowExceptionOnMissing

public void setThrowExceptionOnMissing(boolean throwExceptionOnMissing)

Allows to set the throwExceptionOnMissing flag. This flag controls the behavior of property getter methods that return objects if the requested property is missing. If the flag is set to false (which is the default value), these methods will return null. If set to true, they will throw a NoSuchElementException exception. Note that getter methods for primitive data types are not affected by this flag.

Parameters:

throwExceptionOnMissing - The new value for the property

isThrowExceptionOnMissing

public boolean isThrowExceptionOnMissing()

Returns true if missing values throw Exceptions.

Returns:

true if missing values throw Exceptions

getSubstitutor

public StrSubstitutor getSubstitutor()

Returns the object that is responsible for variable interpolation.

Returns:

the object responsible for variable interpolation

Since:

1.4

getInterpolator

public ConfigurationInterpolator getInterpolator()

Returns the ConfigurationInterpolator object that manages the lookup objects for resolving variables. Note: If this object is manipulated (e.g. new lookup objects added), synchronisation has to be manually ensured. Because ConfigurationInterpolator is not thread-safe concurrent access to properties of this configuration instance (which causes the interpolator to be invoked) may cause race conditions.

Returns:

the ConfigurationInterpolator associated with this configuration

Since:

1.4

createInterpolator

protected ConfigurationInterpolator createInterpolator()

Creates the interpolator object that is responsible for variable interpolation. This method is invoked on first access of the interpolation features. It creates a new instance of ConfigurationInterpolator and sets the default lookup object to an implementation that queries this configuration.

Returns:

the newly created interpolator object

Since:

1.4

getLogger

public org.apache.commons.logging.Log getLogger()

Returns the logger used by this configuration object.

Returns:

the logger

Since:

1.4

setLogger

public void setLogger(org.apache.commons.logging.Log log)

Allows to set the logger to be used by this configuration object. This method makes it possible for clients to exactly control logging behavior. Per default a logger is set that will ignore all log messages. Derived classes that want to enable logging should call this method during their initialization with the logger to be used.

Parameters:

log - the new logger

Since:

1.4

addErrorLogListener

public void addErrorLogListener()

Adds a special ConfigurationErrorListener object to this configuration that will log all internal errors. This method is intended to be used by certain derived classes, for which it is known that they can fail on property access (e.g. DatabaseConfiguration).

Since:

1.4

addProperty

public void addProperty(String key,
                        Object value)

Description copied from interface: Configuration

Add a property to the configuration. If it already exists then the value stated here will be added to the configuration entry. For example, if the property:

resource.loader = file

is already present in the configuration and you call

addProperty("resource.loader", "classpath")

Then you will end up with a List like the following:

["file", "classpath"]

Specified by:

addProperty in interface Configuration

Parameters:

key - The key to add the property to.

value - The value to add.

addPropertyDirect

protected abstract void addPropertyDirect(String key,
                                          Object value)

Adds a key/value pair to the Configuration. Override this method to provide write access to underlying Configuration store.

Parameters:

key - key to use for mapping

value - object to store

interpolate

protected String interpolate(String base)

interpolate key names to handle ${key} stuff

Parameters:

base - string to interpolate

Returns:

returns the key name with the ${key} substituted

interpolate

protected Object interpolate(Object value)

Returns the interpolated value. Non String values are returned without change.

Parameters:

value - the value to interpolate

Returns:

returns the value with variables substituted

interpolateHelper

protected String interpolateHelper(String base,
                                   List priorVariables)

Deprecated. Interpolation is now handled by PropertyConverter; this method will no longer be called

Recursive handler for multple levels of interpolation. When called the first time, priorVariables should be null.

Parameters:

base - string with the ${key} variables

priorVariables - serves two purposes: to allow checking for loops, and creating a meaningful exception message should a loop occur. It's 0'th element will be set to the value of base from the first call. All subsequent interpolated variables are added afterward.

Returns:

the string with the interpolation taken care of

subset

public Configuration subset(String prefix)

Description copied from interface: Configuration

Return a decorator Configuration containing every key from the current Configuration that starts with the specified prefix. The prefix is removed from the keys in the subset. For example, if the configuration contains the following properties:

    prefix.number = 1
    prefix.string = Apache
    prefixed.foo = bar
    prefix = Jakarta

the Configuration returned by subset("prefix") will contain the properties:

    number = 1
    string = Apache
    = Jakarta

(The key for the value "Jakarta" is an empty string)

Since the subset is a decorator and not a modified copy of the initial Configuration, any change made to the subset is available to the Configuration, and reciprocally.

Specified by:

subset in interface Configuration

Parameters:

prefix - The prefix used to select the properties.

Returns:

a subset configuration

See Also:

SubsetConfiguration

setProperty

public void setProperty(String key,
                        Object value)

Description copied from interface: Configuration

Set a property, this will replace any previously set values. Set values is implicitly a call to clearProperty(key), addProperty(key, value).

Specified by:

setProperty in interface Configuration

Parameters:

key - The key of the property to change

value - The new value

clearProperty

public void clearProperty(String key)

Removes the specified property from this configuration. This implementation performs some preparations and then delegates to clearPropertyDirect(), which will do the real work.

Specified by:

clearProperty in interface Configuration

Parameters:

key - the key to be removed

clearPropertyDirect

protected void clearPropertyDirect(String key)

Removes the specified property from this configuration. This method is called by clearProperty() after it has done some preparations. It should be overriden in sub classes. This base implementation is just left empty.

Parameters:

key - the key to be removed

clear

public void clear()

Description copied from interface: Configuration

Remove all properties from the configuration.

Specified by:

clear in interface Configuration

getKeys

public Iterator getKeys(String prefix)

Description copied from interface: Configuration

Get the list of the keys contained in the configuration that match the specified prefix.

Specified by:

getKeys in interface Configuration

Parameters:

prefix - The prefix to test against.

Returns:

An Iterator of keys that match the prefix.

See Also:

Configuration.getKeys()

getProperties

public Properties getProperties(String key)

Description copied from interface: Configuration

Get a list of properties associated with the given configuration key. This method expects the given key to have an arbitrary number of String values, each of which is of the form key=value. These strings are splitted at the equals sign, and the key parts will become keys of the returned Properties object, the value parts become values.

Specified by:

getProperties in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated properties if key is found.

getProperties

public Properties getProperties(String key,
                                Properties defaults)

Get a list of properties associated with the given configuration key.

Parameters:

key - The configuration key.

defaults - Any default values for the returned Properties object. Ignored if null.

Returns:

The associated properties if key is found.

Throws:

ConversionException - is thrown if the key maps to an object that is not a String/List of Strings.

IllegalArgumentException - if one of the tokens is malformed (does not contain an equals sign).

getBoolean

public boolean getBoolean(String key)

Get a boolean associated with the given configuration key.

Specified by:

getBoolean in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated boolean.

See Also:

PropertyConverter.toBoolean(Object)

getBoolean

public boolean getBoolean(String key,
                          boolean defaultValue)

Get a boolean associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getBoolean in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated boolean.

See Also:

PropertyConverter.toBoolean(Object)

getBoolean

public Boolean getBoolean(String key,
                          Boolean defaultValue)

Obtains the value of the specified key and tries to convert it into a Boolean object. If the property has no value, the passed in default value will be used.

Specified by:

getBoolean in interface Configuration

Parameters:

key - the key of the property

defaultValue - the default value

Returns:

the value of this key converted to a Boolean

Throws:

ConversionException - if the value cannot be converted to a Boolean

See Also:

PropertyConverter.toBoolean(Object)

getByte

public byte getByte(String key)

Description copied from interface: Configuration

Get a byte associated with the given configuration key.

Specified by:

getByte in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated byte.

getByte

public byte getByte(String key,
                    byte defaultValue)

Description copied from interface: Configuration

Get a byte associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getByte in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated byte.

getByte

public Byte getByte(String key,
                    Byte defaultValue)

Description copied from interface: Configuration

Get a Byte associated with the given configuration key.

Specified by:

getByte in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated byte if key is found and has valid format, default value otherwise.

getDouble

public double getDouble(String key)

Description copied from interface: Configuration

Get a double associated with the given configuration key.

Specified by:

getDouble in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated double.

getDouble

public double getDouble(String key,
                        double defaultValue)

Description copied from interface: Configuration

Get a double associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getDouble in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated double.

getDouble

public Double getDouble(String key,
                        Double defaultValue)

Description copied from interface: Configuration

Get a Double associated with the given configuration key.

Specified by:

getDouble in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated double if key is found and has valid format, default value otherwise.

getFloat

public float getFloat(String key)

Description copied from interface: Configuration

Get a float associated with the given configuration key.

Specified by:

getFloat in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated float.

getFloat

public float getFloat(String key,
                      float defaultValue)

Description copied from interface: Configuration

Get a float associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getFloat in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated float.

getFloat

public Float getFloat(String key,
                      Float defaultValue)

Description copied from interface: Configuration

Get a Float associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getFloat in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated float if key is found and has valid format, default value otherwise.

getInt

public int getInt(String key)

Description copied from interface: Configuration

Get a int associated with the given configuration key.

Specified by:

getInt in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated int.

getInt

public int getInt(String key,
                  int defaultValue)

Description copied from interface: Configuration

Get a int associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getInt in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated int.

getInteger

public Integer getInteger(String key,
                          Integer defaultValue)

Description copied from interface: Configuration

Get an Integer associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getInteger in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated int if key is found and has valid format, default value otherwise.

getLong

public long getLong(String key)

Description copied from interface: Configuration

Get a long associated with the given configuration key.

Specified by:

getLong in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated long.

getLong

public long getLong(String key,
                    long defaultValue)

Description copied from interface: Configuration

Get a long associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getLong in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated long.

getLong

public Long getLong(String key,
                    Long defaultValue)

Description copied from interface: Configuration

Get a Long associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getLong in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated long if key is found and has valid format, default value otherwise.

getShort

public short getShort(String key)

Description copied from interface: Configuration

Get a short associated with the given configuration key.

Specified by:

getShort in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated short.

getShort

public short getShort(String key,
                      short defaultValue)

Description copied from interface: Configuration

Get a short associated with the given configuration key.

Specified by:

getShort in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated short.

getShort

public Short getShort(String key,
                      Short defaultValue)

Description copied from interface: Configuration

Get a Short associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getShort in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated short if key is found and has valid format, default value otherwise.

getBigDecimal

public BigDecimal getBigDecimal(String key)

Get a BigDecimal associated with the given configuration key.

Specified by:

getBigDecimal in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated BigDecimal if key is found and has valid format

See Also:

setThrowExceptionOnMissing(boolean)

getBigDecimal

public BigDecimal getBigDecimal(String key,
                                BigDecimal defaultValue)

Description copied from interface: Configuration

Get a BigDecimal associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getBigDecimal in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated BigDecimal if key is found and has valid format, default value otherwise.

getBigInteger

public BigInteger getBigInteger(String key)

Get a BigInteger associated with the given configuration key.

Specified by:

getBigInteger in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated BigInteger if key is found and has valid format

See Also:

setThrowExceptionOnMissing(boolean)

getBigInteger

public BigInteger getBigInteger(String key,
                                BigInteger defaultValue)

Description copied from interface: Configuration

Get a BigInteger associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getBigInteger in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated BigInteger if key is found and has valid format, default value otherwise.

getString

public String getString(String key)

Get a string associated with the given configuration key.

Specified by:

getString in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated string.

See Also:

setThrowExceptionOnMissing(boolean)

getString

public String getString(String key,
                        String defaultValue)

Description copied from interface: Configuration

Get a string associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getString in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated string if key is found and has valid format, default value otherwise.

getStringArray

public String[] getStringArray(String key)

Get an array of strings associated with the given configuration key. If the key doesn't map to an existing object, an empty array is returned. If a property is added to a configuration, it is checked whether it contains multiple values. This is obvious if the added object is a list or an array. For strings it is checked whether the string contains the list delimiter character that can be specified using the setListDelimiter() method. If this is the case, the string is splitted at these positions resulting in a property with multiple values.

Specified by:

getStringArray in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated string array if key is found.

Throws:

ConversionException - is thrown if the key maps to an object that is not a String/List of Strings.

See Also:

setListDelimiter(char), setDelimiterParsingDisabled(boolean)

getList

public List getList(String key)

Get a List of strings associated with the given configuration key. If the key doesn't map to an existing object an empty List is returned.

Specified by:

getList in interface Configuration

Parameters:

key - The configuration key.

Returns:

The associated List.

See Also:

getStringArray(String)

getList

public List getList(String key,
                    List defaultValue)

Description copied from interface: Configuration

Get a List of strings associated with the given configuration key. If the key doesn't map to an existing object, the default value is returned.

Specified by:

getList in interface Configuration

Parameters:

key - The configuration key.

defaultValue - The default value.

Returns:

The associated List of strings.

resolveContainerStore

protected Object resolveContainerStore(String key)

Returns an object from the store described by the key. If the value is a Collection object, replace it with the first object in the collection.

Parameters:

key - The property key.

Returns:

value Value, transparently resolving a possible collection dependency.

copy

public void copy(Configuration c)

Copies the content of the specified configuration into this configuration. If the specified configuration contains a key that is also present in this configuration, the value of this key will be replaced by the new value. Note: This method won't work well when copying hierarchical configurations because it is not able to copy information about the properties' structure (i.e. the parent-child-relationships will get lost). So when dealing with hierarchical configuration objects their clone() methods should be used.

Parameters:

c - the configuration to copy (can be null, then this operation will have no effect)

Since:

1.5

append

public void append(Configuration c)

Appends the content of the specified configuration to this configuration. The values of all properties contained in the specified configuration will be appended to this configuration. So if a property is already present in this configuration, its new value will be a union of the values in both configurations. Note: This method won't work well when appending hierarchical configurations because it is not able to copy information about the properties' structure (i.e. the parent-child-relationships will get lost). So when dealing with hierarchical configuration objects their clone() methods should be used.

Parameters:

c - the configuration to be appended (can be null, then this operation will have no effect)

Since:

1.5

interpolatedConfiguration

public Configuration interpolatedConfiguration()

Returns a configuration with the same content as this configuration, but with all variables replaced by their actual values. This method tries to clone the configuration and then perform interpolation on all properties. So property values of the form ${var} will be resolved as far as possible (if a variable cannot be resolved, it remains unchanged). This operation is useful if the content of a configuration is to be exported or processed by an external component that does not support variable interpolation.

Returns:

a configuration with all variables interpolated

Throws:

ConfigurationRuntimeException - if this configuration cannot be cloned

Since:

1.5