org.apache.derby.iapi.util
Class DoubleProperties

java.lang.Object
  java.util.Dictionary<K,V>
      java.util.Hashtable<java.lang.Object,java.lang.Object>
          java.util.Properties
              org.apache.derby.iapi.util.DoubleProperties

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.Object,java.lang.Object>

public final class DoubleProperties
extends java.util.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

private java.util.Properties	read
private java.util.Properties	write

Fields inherited from class java.util.Properties

defaults

Constructor Summary

DoubleProperties(java.util.Properties read, java.util.Properties write)

Method Summary

private static void	addAllNames(java.util.Properties src, java.util.HashSet dest) Add all property names in the Properties object src to the HashSet dest.
java.lang.String	getProperty(java.lang.String key)
java.lang.String	getProperty(java.lang.String key, java.lang.String defaultValue)
java.util.Enumeration	propertyNames()
java.lang.Object	put(java.lang.Object key, java.lang.Object value)

Methods inherited from class java.util.Properties

list, list, load, load, loadFromXML, save, setProperty, store, store, storeToXML, storeToXML, stringPropertyNames

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, putAll, rehash, remove, size, toString, values

Methods inherited from class java.lang.Object

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

Field Detail

read

private final java.util.Properties read

write

private final java.util.Properties write

Constructor Detail

DoubleProperties

public DoubleProperties(java.util.Properties read,
                        java.util.Properties write)

Method Detail

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Specified by:

put in interface java.util.Map<java.lang.Object,java.lang.Object>

Overrides:

put in class java.util.Hashtable<java.lang.Object,java.lang.Object>

getProperty

public java.lang.String getProperty(java.lang.String key)

Overrides:

getProperty in class java.util.Properties

getProperty

public java.lang.String getProperty(java.lang.String key,
                                    java.lang.String defaultValue)

Overrides:

getProperty in class java.util.Properties

propertyNames

public java.util.Enumeration propertyNames()

Overrides:

propertyNames in class java.util.Properties

addAllNames

private static void addAllNames(java.util.Properties src,
                                java.util.HashSet dest)

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