Class DoubleProperties

java.lang.Object

java.util.Dictionary<Object,Object>

java.util.Hashtable<Object,Object>

java.util.Properties

org.apache.derby.iapi.util.DoubleProperties

All Implemented Interfaces:

Serializable, Cloneable, Map<Object,Object>

public final class DoubleProperties
extends Properties

A properties object that links two independent properties together. The read property set is always searched first, with the write property set being second. But any put() calls are always made directly to the write object. Only the put(), propertyNames() and getProperty() methods are supported by this class.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private final Properties	read
private final Properties	write

Fields inherited from class Properties

defaults

Constructor Summary

Constructors

Constructor	Description
DoubleProperties(Properties read, Properties write)

Method Summary

Modifier and Type	Method	Description
private static void	addAllNames(Properties src, HashSet<Object> dest)	Add all property names in the Properties object src to the HashSet dest.
String	getProperty(String key)
String	getProperty(String key, String defaultValue)
Enumeration<Object>	propertyNames()
Object	put(Object key, Object value)

Methods inherited from class Properties

clear, clone, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keys, keySet, list, list, load, load, loadFromXML, merge, putAll, putIfAbsent, rehash, remove, remove, replace, replace, replaceAll, save, setProperty, size, store, store, storeToXML, storeToXML, storeToXML, stringPropertyNames, toString, values

Methods inherited from class Object

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

Field Details

read

private final Properties read

write

private final Properties write

Constructor Details

DoubleProperties

public DoubleProperties(Properties read,
 Properties write)

Method Details

put

public Object put(Object key,
 Object value)

Specified by:

put in interface Map<Object,Object>

Overrides:

put in class Properties

getProperty

public String getProperty(String key)

Overrides:

getProperty in class Properties

getProperty

public String getProperty(String key,
 String defaultValue)

Overrides:

getProperty in class Properties

propertyNames

public Enumeration<Object> propertyNames()

Overrides:

propertyNames in class Properties

addAllNames

private static void addAllNames(Properties src,
 HashSet<Object> dest)

Add all property names in the Properties object src to the HashSet dest.