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- /*
- * Copyright 1999-2005 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.util;
-
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.io.Reader;
- import java.util.Enumeration;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
-
- //code stolen from org.apache.batik.util and modified slightly
- //does what sun.misc.Service probably does, but it cannot be relied on.
- //hopefully will be part of standard jdk sometime.
-
- /**
- * This class loads services present in the class path.
- */
- public class Service {
-
- private static Map providerMap = new java.util.Hashtable();
-
- public static synchronized Iterator providers(Class cls) {
- ClassLoader cl = cls.getClassLoader();
- // null if loaded by bootstrap class loader
- if (cl == null) {
- cl = ClassLoader.getSystemClassLoader();
- }
- String serviceFile = "META-INF/services/" + cls.getName();
-
- // log.debug("File: " + serviceFile);
-
- List lst = (List)providerMap.get(serviceFile);
- if (lst != null) {
- return lst.iterator();
- }
-
- lst = new java.util.Vector();
- providerMap.put(serviceFile, lst);
-
- Enumeration e;
- try {
- e = cl.getResources(serviceFile);
- } catch (IOException ioe) {
- return lst.iterator();
- }
-
- while (e.hasMoreElements()) {
- try {
- java.net.URL u = (java.net.URL)e.nextElement();
- //log.debug("URL: " + u);
-
- InputStream is = u.openStream();
- Reader r = new InputStreamReader(is, "UTF-8");
- BufferedReader br = new BufferedReader(r);
-
- String line = br.readLine();
- while (line != null) {
- try {
- // First strip any comment...
- int idx = line.indexOf('#');
- if (idx != -1) {
- line = line.substring(0, idx);
- }
-
- // Trim whitespace.
- line = line.trim();
-
- // If nothing left then loop around...
- if (line.length() == 0) {
- line = br.readLine();
- continue;
- }
- // log.debug("Line: " + line);
-
- // Try and load the class
- // Object obj = cl.loadClass(line).newInstance();
- // stick it into our vector...
- lst.add(line);
- } catch (Exception ex) {
- // Just try the next line
- }
-
- line = br.readLine();
- }
- } catch (Exception ex) {
- // Just try the next file...
- }
-
- }
- return lst.iterator();
- }
-
- }
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