org.eigenbase.util.property
Class PersistentStringProperty

java.lang.Object
  org.eigenbase.util.property.Property
      org.eigenbase.util.property.StringProperty
          org.eigenbase.util.property.PersistentStringProperty

public class PersistentStringProperty
extends StringProperty

Definition and accessor for a string property that is capable of storing itself in a .properties file.

Since:

December 3, 2004

Version:

$Id: //open/dev/farrago/src/org/eigenbase/util/property/PersistentStringProperty.java#13 $

Author:

Stephan Zuercher

Field Summary

private StringProperty	propertyFileLocation
private PersistentPropertyStorage	storage
private boolean	storageInitialized
private static Logger	tracer

Fields inherited from class org.eigenbase.util.property.Property

properties

Constructor Summary

PersistentStringProperty(Properties properties, String path, String defaultValue, StringProperty propertyFileLocation)
Creates a persistent string property.

Method Summary

String

set(String value) Sets the value of this property.

Methods inherited from class org.eigenbase.util.property.StringProperty

get, get, get

Methods inherited from class org.eigenbase.util.property.Property

addTrigger, booleanValue, getDefaultValue, getInternal, getPath, getString, isSet, onChange, removeTrigger, setString, stringValue, toBoolean

Methods inherited from class java.lang.Object

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

Field Detail

tracer

private static final Logger tracer

propertyFileLocation

private StringProperty propertyFileLocation

storage

private PersistentPropertyStorage storage

storageInitialized

private boolean storageInitialized

Constructor Detail

PersistentStringProperty

public PersistentStringProperty(Properties properties,
                                String path,
                                String defaultValue,
                                StringProperty propertyFileLocation)

Creates a persistent string property.

Parameters:

properties - Properties object which holds values for this property.

path - Name by which this property is serialized to a properties file, for example "com.acme.trace.Verbosity".

defaultValue - Default value, null if there is no default.

propertyFileLocation - Location of the property file where this property's value should be persisted.

Method Detail

set

public String set(String value)

Sets the value of this property.

This method is synchronized to prevent multiple threads from attempting to initialize the property storage (storage) simultaneously.

Overrides:

set in class StringProperty

Returns:

The previous value, or the default value if not set.