trunk/xbean-spring-common/src/main/java/org/apache/xbean/spring/context/impl/NamespaceHelper.java

/**
 * 
 * Copyright 2005-2006 The Apache Software Foundation or its licensors,  as applicable.
 * 
 * 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.xbean.spring.context.impl;

/**
 * A helper class for turning namespaces into META-INF/services URIs
 * 
 * @version $Revision: 1.1 $
 */
public class NamespaceHelper {
    public static final String META_INF_PREFIX = "META-INF/services/org/apache/xbean/spring/";
    public static final String OLD_META_INF_PREFIX = "META-INF/services/org/xbean/spring/";

    /**
     * Converts the namespace and localName into a valid path name we can use on
     * the classpath to discover a text file
     */
    public static String createDiscoveryPathName(String uri, String localName) {
        if (isEmpty(uri)) {
            return localName;
        }
        return createDiscoveryPathName(uri) + "/" + localName;
    }

    /**
     * Converts the namespace and localName into a valid path name we can use on
     * the classpath to discover a text file
     */
    public static String createDiscoveryPathName(String uri) {
        // TODO proper encoding required
        // lets replace any dodgy characters
        return META_INF_PREFIX + uri.replaceAll("://", "/").replace(':', '/').replace(' ', '_');
    }

    /**
     * Creates the old URI for backwards compatibility
     */
    public static String createDiscoveryOldPathName(String uri) {
        // TODO proper encoding required
        // lets replace any dodgy characters
        return OLD_META_INF_PREFIX + uri.replaceAll("://", "/").replace(':', '/').replace(' ', '_');
    }

    public static boolean isEmpty(String uri) {
        return uri == null || uri.length() == 0;
    }

}