src/org/apache/felix/moduleloader/Util.java

/*
 *   Copyright 2005 The Apache Software Foundation
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */
package org.apache.felix.moduleloader;

public class Util
{
    public static String getClassName(String className)
    {
        if (className == null)
        {
            className = "";
        }
        return (className.lastIndexOf('.') < 0)
            ? "" : className.substring(className.lastIndexOf('.') + 1);
    }

    public static String getClassPackage(String className)
    {
        if (className == null)
        {
            className = "";
        }
        return (className.lastIndexOf('.') < 0)
            ? "" : className.substring(0, className.lastIndexOf('.'));
    }

    public static String getResourcePackage(String resource)
    {
        if (resource == null)
        {
            resource = "";
        }
        // NOTE: The package of a resource is tricky to determine since
        // resources do not follow the same naming conventions as classes.
        // This code is pessimistic and assumes that the package of a
        // resource is everything up to the last '/' character. By making
        // this choice, it will not be possible to load resources from
        // imports using relative resource names. For example, if a
        // bundle exports "foo" and an importer of "foo" tries to load
        // "/foo/bar/myresource.txt", this will not be found in the exporter
        // because the following algorithm assumes the package name is
        // "foo.bar", not just "foo". This only affects imported resources,
        // local resources will work as expected.
        String pkgName = (resource.startsWith("/")) ? resource.substring(1) : resource;
        pkgName = (pkgName.lastIndexOf('/') < 0)
            ? "" : pkgName.substring(0, pkgName.lastIndexOf('/'));
        pkgName = pkgName.replace('/', '.');
        return pkgName;
    }
}