com.solarmetric.conf
Class ConfigurationImpl

java.lang.Object
  |
  +--com.solarmetric.conf.ConfigurationImpl

All Implemented Interfaces:

BeanInfo, Cloneable, com.solarmetric.util.Closeable, Configuration, Externalizable, Serializable, ValueListener

Direct Known Subclasses:

JDOConfigurationImpl

public class ConfigurationImpl

extends Object

implements Configuration, Externalizable, ValueListener

Default implementation of the Configuration interface. Subclasses can choose to obtain configuration information from JNDI, Properties, a Bean-builder, etc. This class provides base configuration functionality, including serialization, the equals and hashCode contracts, and default property loading.

On construction, the class will attempt to locate a default properties file called solarmetric.properties located at any top level token of the CLASSPATH. The name of the properties file can be overridden.

Subclasses should be sure to pass in false to the constructor when they call it, then call loadDefaults() themselves if they want to load default properties. Otherwise, their field initializations will overwrite the defaults that were loaded.

Property descriptors for Value instances are constructed from the Localizer for the package of the configuration class. The following localized strings will be used for describing a value, where name is the last token of the value's property string:

• name-name: The name that will be displayed for the option in a user interface; required.
• name-desc: A brief description of the option; required.
• name-type: The type or category name for this option; required.
• name-expert: True if this is an expert option, false otherwise; defaults to false.
• name-values: Set of expected or common values, excluding alias keys; optional.
• name-interface: The class name of an interface whose discoverable implementations should be included in the set of expected or common values; optional.
• name-cat: The hierarchical category for the property name, separated by ".".
• name-displayorder: The order in which the property should be displayer.

See Also:

Serialized Form

Field Summary

protected LogFactory

logFactory

Fields inherited from interface com.solarmetric.conf.Configuration

ATTRIBUTE_ALLOWED_VALUES, ATTRIBUTE_CATEGORY, ATTRIBUTE_ORDER, ATTRIBUTE_TYPE

Fields inherited from interface java.beans.BeanInfo

ICON_COLOR_16x16, ICON_COLOR_32x32, ICON_MONO_16x16, ICON_MONO_32x32

Constructor Summary

ConfigurationImpl()
Default constructor.

ConfigurationImpl(boolean loadDefaults)
Constructor.

Method Summary

protected BooleanValue	addBoolean(String property) Add the given value to the set of configuration properties.
protected DoubleValue	addDouble(String property) Add the given value to the set of configuration properties.
protected FileValue	addFile(String property) Add the given value to the set of configuration properties.
protected IntValue	addInt(String property) Add the given value to the set of configuration properties.
protected PluginValue	addPlugin(String property) Add the given value to the set of configuration properties.
protected PluginListValue	addPluginList(String property) Add the given value to the set of configuration properties.
void	addPropertyChangeListener(PropertyChangeListener listener) Adds a listener for any property changes.
protected StringValue	addString(String property) Add the given value to the set of configuration properties.
protected StringListValue	addStringList(String property) Add the given value to the set of configuration properties.
protected Value	addValue(Value val) Add the given value to the set of configuration properties.
protected void	assertNotFrozen() Checks if the configuration has been frozen and if so throws a IllegalStateException, otherwise returns silently.
Object	clone() Return a copy of the current configuration.
void	close() Free the resources used by this object.
boolean	equals(Object other) Performs an equality check based on the properties returned from toProperties(boolean).
void	fromFile(File f) Fill in properties from the given properties file.
void	fromProperties(Properties props) Fill in values from the given properties instance.
void	fromStream(InputStream in) Fill in properties from the given properties stream.
BeanInfo[]	getAdditionalBeanInfo()
BeanDescriptor	getBeanDescriptor()
RuntimeException	getConfigurationException(String msg, Throwable cause) Throws a standard or nestable runtime exception by default.
Log	getConfigurationLog() Reutrns the logging channel com.solarmetric.Runtime by default.
int	getDefaultEventIndex()
int	getDefaultPropertyIndex()
EventSetDescriptor[]	getEventSetDescriptors()
Image	getIcon(int kind)
Log	getLog(String category) Return the log for the given category.
LogFactory	getLogFactory() The log factory.
MethodDescriptor[]	getMethodDescriptors()
protected String	getProductName() Return the product name.
PropertyDescriptor[]	getPropertyDescriptors()
Value	getValue(String property) Return the Value for the given property, or null if none.
Value[]	getValues() Return the set of all Values.
int	hashCode() Computes hash code based on the properties returned from toProperties(boolean).
boolean	hasJava5() Return true if this VM has Java 5 features; otherwise returns false.
boolean	isFrozen() Return true if this Configuration has been frozen.
protected boolean	isInvalidProperty(String propName) Returns true if the specified property name should raise a warning if it is not found in the list of known properties.
boolean	loadDefaults() Invoke this method to load default values from properties.
void	readExternal(ObjectInput in) Implementation of the Externalizable interface to read from the properties written by writeExternal(java.io.ObjectOutput).
void	removePropertyChangeListener(PropertyChangeListener listener) Removes a listener for any property changes.
void	setFrozen(boolean frozen) Lock down the configuration's state.
void	setLogFactory(LogFactory logFactory) log factory.
void	setProperties(String resourceName) This method loads the named resource as a properties file.
void	setPropertiesFile(File file) This method loads the named file as a properties file.
Properties	toProperties(boolean storeDefaults) Properties objects are cached once created so that calls to this method are relatively cheap (the properties object is still cloned for each call).
void	valueChanged(Value val) Callback used by Value objects to notify listener of change.
void	writeExternal(ObjectOutput out) Implementation of the Externalizable interface to write the properties returned by toProperties(boolean).

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

logFactory

protected LogFactory logFactory

Constructor Detail

ConfigurationImpl

public ConfigurationImpl()

Default constructor. Attempts to load default properties from the solarmetric.properties resource. Override the getProductName() method to change the name of the default properties resource.

ConfigurationImpl

public ConfigurationImpl(boolean loadDefaults)

Constructor.

Parameters:

loadDefaults - whether to attempt to load the default solarmetric.properties resource

Method Detail

getProductName

protected String getProductName()

Return the product name. Defaults to solarmetric.

See Also:

loadDefaults()

loadDefaults

public boolean loadDefaults()

Invoke this method to load default values from properties. The method will first check the <product-name>.properties system property for the location of a properties file to parse, where product-name is the return value of the getProductName() method. If no system property is defined, the default resource location of <product-name>.properties is used. If it exists, the resource is parsed as a properties file. All system properties are then added; they override any same-named properties in the resource. The combined properties are then loaded into this configuration.

Returns:

true if a properties resource was found, false otherwise

See Also:

ClassLoader.getResource(java.lang.String)

setLogFactory

public void setLogFactory(LogFactory logFactory)

Description copied from interface: Configuration

log factory.

Specified by:

setLogFactory in interface Configuration

getLogFactory

public LogFactory getLogFactory()

Description copied from interface: Configuration

The log factory. If no log factory has been set explicitly, this method will create one.

Specified by:

getLogFactory in interface Configuration

getLog

public Log getLog(String category)

Description copied from interface: Configuration

Return the log for the given category.

Specified by:

getLog in interface Configuration

Following copied from interface: com.solarmetric.conf.Configuration

See Also:

Configuration.getLogFactory()

getValues

public Value[] getValues()

Description copied from interface: Configuration

Return the set of all Values.

Specified by:

getValues in interface Configuration

getValue

public Value getValue(String property)

Description copied from interface: Configuration

Return the Value for the given property, or null if none.

Specified by:

getValue in interface Configuration

setFrozen

public void setFrozen(boolean frozen)

Description copied from interface: Configuration

Lock down the configuration's state. Attempting to set state after a configuration has been frozen results in a IllegalStateException.

Specified by:

setFrozen in interface Configuration

isFrozen

public boolean isFrozen()

Description copied from interface: Configuration

Return true if this Configuration has been frozen.

Specified by:

isFrozen in interface Configuration

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)

Description copied from interface: Configuration

Adds a listener for any property changes. The property events fired will not include the old value.

Specified by:

addPropertyChangeListener in interface Configuration

Following copied from interface: com.solarmetric.conf.Configuration

Parameters:

listener - the listener to receive notification of property changes

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)

Description copied from interface: Configuration

Removes a listener for any property changes.

Specified by:

removePropertyChangeListener in interface Configuration

Following copied from interface: com.solarmetric.conf.Configuration

Parameters:

listener - the listener to remove

valueChanged

public void valueChanged(Value val)

Description copied from interface: ValueListener

Callback used by Value objects to notify listener of change.

Specified by:

valueChanged in interface ValueListener

close

public void close()

Description copied from interface: Configuration

Free the resources used by this object.

Specified by:

close in interface Configuration

getAdditionalBeanInfo

public BeanInfo[] getAdditionalBeanInfo()

Specified by:

getAdditionalBeanInfo in interface BeanInfo

getBeanDescriptor

public BeanDescriptor getBeanDescriptor()

Specified by:

getBeanDescriptor in interface BeanInfo

getDefaultEventIndex

public int getDefaultEventIndex()

Specified by:

getDefaultEventIndex in interface BeanInfo

getDefaultPropertyIndex

public int getDefaultPropertyIndex()

Specified by:

getDefaultPropertyIndex in interface BeanInfo

getEventSetDescriptors

public EventSetDescriptor[] getEventSetDescriptors()

Specified by:

getEventSetDescriptors in interface BeanInfo

getIcon

public Image getIcon(int kind)

Specified by:

getIcon in interface BeanInfo

getMethodDescriptors

public MethodDescriptor[] getMethodDescriptors()

Specified by:

getMethodDescriptors in interface BeanInfo

getPropertyDescriptors

public PropertyDescriptor[] getPropertyDescriptors()

Specified by:

getPropertyDescriptors in interface BeanInfo

toProperties

public Properties toProperties(boolean storeDefaults)

Properties objects are cached once created so that calls to this method are relatively cheap (the properties object is still cloned for each call).

Specified by:

toProperties in interface Configuration

Parameters:

storeDefaults - if false, then property values that are equal to the default value for a configuration will not be stored

See Also:

Configuration.toProperties(boolean)

fromProperties

public void fromProperties(Properties props)

Fill in values from the given properties instance.

Specified by:

fromProperties in interface Configuration

clone

public Object clone()

Description copied from interface: Configuration

Return a copy of the current configuration.

Specified by:

clone in interface Configuration

Overrides:

clone in class Object

isInvalidProperty

protected boolean isInvalidProperty(String propName)

Returns true if the specified property name should raise a warning if it is not found in the list of known properties.

fromFile

public void fromFile(File f)
              throws IOException

Description copied from interface: Configuration

Fill in properties from the given properties file.

Specified by:

fromFile in interface Configuration

fromStream

public void fromStream(InputStream in)
                throws IOException

Description copied from interface: Configuration

Fill in properties from the given properties stream.

Specified by:

fromStream in interface Configuration

setProperties

public void setProperties(String resourceName)
                   throws IOException

This method loads the named resource as a properties file. It is useful for auto-configuration tools so users can specify a properties value with the name of a resource.

setPropertiesFile

public void setPropertiesFile(File file)
                       throws IOException

This method loads the named file as a properties file. It is useful for auto-configuration tools so users can specify a propertiesFile value with the name of a file.

assertNotFrozen

protected void assertNotFrozen()

Checks if the configuration has been frozen and if so throws a IllegalStateException, otherwise returns silently. Implementations should call this method before setting any state.

equals

public boolean equals(Object other)

Performs an equality check based on the properties returned from toProperties(boolean).

Overrides:

equals in class Object

hashCode

public int hashCode()

Computes hash code based on the properties returned from toProperties(boolean).

Overrides:

hashCode in class Object

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Implementation of the Externalizable interface to read from the properties written by writeExternal(java.io.ObjectOutput).

Specified by:

readExternal in interface Externalizable

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Implementation of the Externalizable interface to write the properties returned by toProperties(boolean).

Specified by:

writeExternal in interface Externalizable

addValue

protected Value addValue(Value val)

Add the given value to the set of configuration properties.

addString

protected StringValue addString(String property)

Add the given value to the set of configuration properties.

addFile

protected FileValue addFile(String property)

Add the given value to the set of configuration properties.

addInt

protected IntValue addInt(String property)

Add the given value to the set of configuration properties.

addDouble

protected DoubleValue addDouble(String property)

Add the given value to the set of configuration properties.

addBoolean

protected BooleanValue addBoolean(String property)

Add the given value to the set of configuration properties.

addStringList

protected StringListValue addStringList(String property)

Add the given value to the set of configuration properties.

addPlugin

protected PluginValue addPlugin(String property)

Add the given value to the set of configuration properties.

addPluginList

protected PluginListValue addPluginList(String property)

Add the given value to the set of configuration properties.

getConfigurationLog

public Log getConfigurationLog()

Reutrns the logging channel com.solarmetric.Runtime by default.

Specified by:

getConfigurationLog in interface Configuration

getConfigurationException

public RuntimeException getConfigurationException(String msg,
                                                  Throwable cause)

Throws a standard or nestable runtime exception by default.

Specified by:

getConfigurationException in interface Configuration

hasJava5

public boolean hasJava5()

Description copied from interface: Configuration

Return true if this VM has Java 5 features; otherwise returns false.

Specified by:

hasJava5 in interface Configuration