org.jasypt.properties
Class EncryptableProperties

Object
  java.util.Dictionary<K,V>
      java.util.Hashtable<Object,Object>
          java.util.Properties
              org.jasypt.properties.EncryptableProperties

All Implemented Interfaces:

Serializable, Cloneable, Map<Object,Object>

public final class EncryptableProperties
extends Properties

Subclass of java.util.Properties which can make use of a StringEncryptor or TextEncryptor object to decrypt property values if they are encrypted in the .properties file.

A value is considered "encrypted" when it appears surrounded by ENC(...), like:

my.value=ENC(!"DGAS24FaIO$)

Decryption is performed on-the-fly when the getProperty(String) or getProperty(String, String) methods are called, and only these two methods perform decryption (note that neither Hashtable.get(Object) nor Hashtable.toString() do). Load and store operations are not affected by decryption in any manner.

Encrypted and unencrypted objects can be combined in the same properties file.

Please note that, altough objects of this class are Serializable, they cannot be serialized and then de-serialized in different classloaders or virtual machines. This is so because encryptors are not serializable themselves (they cannot, as they contain sensitive information) and so they remain in memory, and live for as long as the classloader lives.

Since:

1.4

Author:

Daniel Fernández

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.Properties

defaults

Constructor Summary

EncryptableProperties(Properties defaults, StringEncryptor stringEncryptor)
Creates an EncryptableProperties instance which will use the passed StringEncryptor object to decrypt encrypted values, and the passed defaults as default values (may contain encrypted values).

EncryptableProperties(Properties defaults, TextEncryptor textEncryptor)
Creates an EncryptableProperties instance which will use the passed TextEncryptor object to decrypt encrypted values, and the passed defaults as default values (may contain encrypted values).

EncryptableProperties(StringEncryptor stringEncryptor)
Creates an EncryptableProperties instance which will use the passed StringEncryptor object to decrypt encrypted values.

EncryptableProperties(TextEncryptor textEncryptor)
Creates an EncryptableProperties instance which will use the passed TextEncryptor object to decrypt encrypted values.

Method Summary

protected void	finalize()
String	getProperty(String key) Obtains the property value for the specified key (see Properties.getProperty(String)), decrypting it if needed.
String	getProperty(String key, String defaultValue) Obtains the property value for the specified key (see Properties.getProperty(String)), decrypting it if needed.

Methods inherited from class java.util.Properties

list, list, load, load, loadFromXML, propertyNames, 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, put, putAll, rehash, remove, size, toString, values

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

EncryptableProperties

public EncryptableProperties(StringEncryptor stringEncryptor)

Creates an EncryptableProperties instance which will use the passed StringEncryptor object to decrypt encrypted values.

Parameters:

stringEncryptor - the StringEncryptor to be used do decrypt values. It can not be null.

EncryptableProperties

public EncryptableProperties(TextEncryptor textEncryptor)

Creates an EncryptableProperties instance which will use the passed TextEncryptor object to decrypt encrypted values.

Parameters:

textEncryptor - the TextEncryptor to be used do decrypt values. It can not be null.

EncryptableProperties

public EncryptableProperties(Properties defaults,
                             StringEncryptor stringEncryptor)

Creates an EncryptableProperties instance which will use the passed StringEncryptor object to decrypt encrypted values, and the passed defaults as default values (may contain encrypted values).

Parameters:

defaults - default values for properties (may be encrypted).

stringEncryptor - the StringEncryptor to be used do decrypt values. It can not be null.

EncryptableProperties

public EncryptableProperties(Properties defaults,
                             TextEncryptor textEncryptor)

Creates an EncryptableProperties instance which will use the passed TextEncryptor object to decrypt encrypted values, and the passed defaults as default values (may contain encrypted values).

Parameters:

defaults - default values for properties (may be encrypted).

textEncryptor - the TextEncryptor to be used do decrypt values. It can not be null.

Method Detail

getProperty

public String getProperty(String key)

Obtains the property value for the specified key (see Properties.getProperty(String)), decrypting it if needed.

Overrides:

getProperty in class Properties

Parameters:

key - the property key

Returns:

the (decrypted) value

getProperty

public String getProperty(String key,
                          String defaultValue)

Obtains the property value for the specified key (see Properties.getProperty(String)), decrypting it if needed.

If no value is found for the specified key, the default value will be returned (decrypted if needed).

Overrides:

getProperty in class Properties

Parameters:

key - the property key

defaultValue - the default value to return

Returns:

the (decrypted) value

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable