I'm using org.apache.java.util.Configurations in my Turbine development and
am using a patch on it that is proving quite useful to me.
it is a getConfigurations(String prefix) function.
having a Configurations with the following values:
other.service.name=TheOtherService
yetanother.service.name=YetAnotherService
my.service.name=MyService
my.service.value=352
my.service.anothervalue=0
Calling getConfigurations("my.service") returns a Configurations containing
the values:
name=MyService
value=352
anothervalue=0
It is very valuable for me to have the option to pass configurations with
values that are not dependent on the service in question, and lacking a
better place, I submit the patch here, since it is not being developed in
it's original place (jserv).
Magnus
Index: src/java/org/apache/java/util/Configurations.java
===================================================================
RCS file:
/products/cvs/turbine/turbine/src/java/org/apache/java/util/Configurations.j
ava,v
retrieving revision 1.2
diff -u -r1.2 Configurations.java
--- src/java/org/apache/java/util/Configurations.java 2000/09/06 16:50:23
1.2
+++ src/java/org/apache/java/util/Configurations.java 2000/12/01 08:27:46
@@ -291,6 +291,66 @@
}
/**
+ * Get a new Configurations object containing only those
+ * Configurations that are specified by the prefix String.
+ * The method can also strip the prefix String off the
+ * keys in the returned Configurations.
+ *
+ * @param prefix The prefix to select
+ * @param stripPrefix If true, the prefix will be stripped
+ * from the keys in the new Configurations
+ * @return The new configurations
+ */
+ public Configurations getConfigurations(String prefix,
+ boolean stripPrefix)
+ {
+ ConfigurationsRepository newRepository =
+ new ExtendedProperties();
+
+ Enumeration e = getKeys(prefix);
+ while(e.hasMoreElements())
+ {
+ String key = (String)e.nextElement();
+ String newKey = stripPrefix ? stripPrefix(key, prefix)
+ : key;
+
+ newRepository.put(newKey, repository.get(key));
+ }
+ return new Configurations(newRepository);
+ }
+
+ /**
+ * Returns a new Configuration object containing only those
+ * Configurations that are specified by the prefix String,
+ * stripping the prefix.
+ *
+ * @param prefix The prefix to select
+ * @param stripPrefix If true, the prefix will be stripped
+ * from the keys in the new Configurations
+ * @return The new configurations
+ */
+ public Configurations getConfigurations(String prefix)
+ {
+ return getConfigurations(prefix, true);
+ }
+
+ /**
+ * Strips a prefix from a property key. The method will throw
+ * an IllegalArgumentException if the key doesn't start with
+ * prefix.
+ *
+ */
+ private String stripPrefix(String key, String prefix)
+ {
+ if ( !key.startsWith(prefix) )
+ {
+ throw new IllegalArgumentException(
+ "Key must start with prefix");
+ }
+ return key.substring(prefix.length()+1); //Strip the dot also
+ }
+
+ /**
* Get an array of strings associated with the given configuration
* key.
*
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