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Port of r603666 to 1.0.x. Change Services.getImplementorClasses(Class) and Services.getImplementorClasses(Class,ClassLoader) to filter out implementations that are not assignable to the Class argument. This allows the Services call to be more fault-tolerant in environments with odd classloader configurations. 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/1.0.x@609766 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Patrick Linskey 2008-01-07 20:09:05 +00:00
parent cae90a6cf2
commit d2264b92bb
1 changed files with 17 additions and 1 deletions
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18
openjpa-lib/src/main/java/org/apache/openjpa/lib/util/Services.java
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@ -25,7 +25,9 @@ import java.io.InputStreamReader;
import java.net.URL;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
@ -145,7 +147,21 @@ public class Services {
public static Class[] getImplementorClasses(Class serviceClass,
ClassLoader loader) {
return getImplementorClasses(serviceClass.getName(), loader);
Set invalid = new HashSet();
Class[] classes = getImplementorClasses(serviceClass.getName(), loader);
// filter out any classes that have any classloader issues wrt.
// the specified service class.
for (int i = 0; i < classes.length; i++)
if (!serviceClass.isAssignableFrom(classes[i]))
invalid.add(classes[i]);
if (invalid.size() != 0) {
List list = new ArrayList(Arrays.asList(classes));
list.removeAll(invalid);
return (Class[]) list.toArray(new Class[list.size()]);
} else {
return classes;
}
}
/**