jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/processing/ServiceProxy.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/processing/ServiceProxy.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/processing/ServiceProxy.java

Thu, 02 Oct 2008 19:58:40 -0700

author: xdono
date: Thu, 02 Oct 2008 19:58:40 -0700
changeset 117: 24a47c3062fe
parent 104: 5e89c4ca637c
child 184: 905e151a185a
permissions: -rw-r--r--

6754988: Update copyright year
Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

 /*
  * Copyright 2006-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.javac.processing;
 import java.io.BufferedReader;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.net.MalformedURLException;
 import java.net.URL;
 /**
  * Utility class to determine if a service can be found on the
  * path that might be used to create a class loader.
  *
  * <p><b>This is NOT part of any API supported by Sun Microsystems.
  * If you write code that depends on this, you do so at your own risk.
  * This code and its internal interfaces are subject to change or
  * deletion without notice.</b>
  *
  */
 // based on sun.misc.Service
 class ServiceProxy {
     static class ServiceConfigurationError extends Error {
         static final long serialVersionUID = 7732091036771098303L;
         ServiceConfigurationError(String msg) {
             super(msg);
         }
     }
     private static final String prefix = "META-INF/services/";
     private static void fail(Class service, String msg)
             throws ServiceConfigurationError {
         throw new ServiceConfigurationError(service.getName() + ": " + msg);
     }
     private static void fail(Class service, URL u, int line, String msg)
             throws ServiceConfigurationError {
         fail(service, u + ":" + line + ": " + msg);
     }
     /**
      * Parse the content of the given URL as a provider-configuration file.
      *
      * @param  service
      *         The service class for which providers are being sought;
      *         used to construct error detail strings
      *
      * @param  url
      *         The URL naming the configuration file to be parsed
      *
      * @return true if the name of a service is found
      *
      * @throws ServiceConfigurationError
      *         If an I/O error occurs while reading from the given URL, or
      *         if a configuration-file format error is detected
      */
     private static boolean parse(Class service, URL u) throws ServiceConfigurationError {
         InputStream in = null;
         BufferedReader r = null;
         try {
             in = u.openStream();
             r = new BufferedReader(new InputStreamReader(in, "utf-8"));
             int lc = 1;
             String ln;
             while ((ln = r.readLine()) != null) {
                 int ci = ln.indexOf('#');
                 if (ci >= 0) ln = ln.substring(0, ci);
                 ln = ln.trim();
                 int n = ln.length();
                 if (n != 0) {
                     if ((ln.indexOf(' ') >= 0) || (ln.indexOf('\t') >= 0))
                         fail(service, u, lc, "Illegal configuration-file syntax");
                     int cp = ln.codePointAt(0);
                     if (!Character.isJavaIdentifierStart(cp))
                         fail(service, u, lc, "Illegal provider-class name: " + ln);
                     for (int i = Character.charCount(cp); i < n; i += Character.charCount(cp)) {
                         cp = ln.codePointAt(i);
                         if (!Character.isJavaIdentifierPart(cp) && (cp != '.'))
                             fail(service, u, lc, "Illegal provider-class name: " + ln);
                     }
                     return true;
                 }
             }
         } catch (FileNotFoundException x) {
             return false;
         } catch (IOException x) {
             fail(service, ": " + x);
         } finally {
             try {
                 if (r != null) r.close();
             } catch (IOException y) {
                 fail(service, ": " + y);
             }
             try {
                 if (in != null) in.close();
             } catch (IOException y) {
                 fail(service, ": " + y);
             }
         }
         return false;
     }
     /**
      * Return true if a description for at least one service is found in the
      * service configuration files in the given URLs.
      */
     public static boolean hasService(Class<?> service, URL[] urls)
             throws ServiceConfigurationError {
         for (URL url: urls) {
             try {
                 String fullName = prefix + service.getName();
                 URL u = new URL(url, fullName);
                 boolean found = parse(service, u);
                 if (found)
                     return true;
             } catch (MalformedURLException e) {
                 // should not happen; ignore it if it does
             }
         }
         return false;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/processing/ServiceProxy.java@24a47c3062fe (annotated)

src/share/classes/com/sun/tools/javac/processing/ServiceProxy.java