jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/istack/internal/tools/ParallelWorldClassLoader.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/istack/internal/tools/ParallelWorldClassLoader.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/istack/internal/tools/ParallelWorldClassLoader.java

Thu, 31 Aug 2017 15:18:52 +0800

author: aoqi
date: Thu, 31 Aug 2017 15:18:52 +0800
changeset 637: 9c07ef4934dd
parent 397: b99d7e355d4b
parent 0: 373ffda63c9a
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.istack.internal.tools;
 import java.io.InputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
 import java.net.JarURLConnection;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.MalformedURLException;
 import java.net.URLConnection;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.jar.JarFile;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 /**
  * Load classes/resources from a side folder, so that
  * classes of the same package can live in a single jar file.
  *
  * <p>
  * For example, with the following jar file:
  * <pre>
  *  /
  *  +- foo
  *     +- X.class
  *  +- bar
  *     +- X.class
  * </pre>
  * <p>
  * {@link ParallelWorldClassLoader}("foo/") would load <tt>X.class<tt> from
  * <tt>/foo/X.class</tt> (note that X is defined in the root package, not
  * <tt>foo.X</tt>.
  *
  * <p>
  * This can be combined with  {@link MaskingClassLoader} to mask classes which are loaded by the parent
  * class loader so that the child class loader
  * classes living in different folders are loaded
  * before the parent class loader loads classes living the jar file publicly
  * visible
  * For example, with the following jar file:
  * <pre>
  *  /
  *  +- foo
  *     +- X.class
  *  +- bar
  *     +-foo
  *        +- X.class
  * </pre>
  * <p>
  * {@link ParallelWorldClassLoader}(MaskingClassLoader.class.getClassLoader()) would load <tt>foo.X.class<tt> from
  * <tt>/bar/foo.X.class</tt> not the <tt>foo.X.class<tt> in the publicly visible place in the jar file, thus
  * masking the parent classLoader from loading the class from  <tt>foo.X.class<tt>
  * (note that X is defined in the  package foo, not
  * <tt>bar.foo.X</tt>.
  *
  * @author Kohsuke Kawaguchi
  */
 public class ParallelWorldClassLoader extends ClassLoader implements Closeable {
     /**
      * Strings like "prefix/", "abc/", or "" to indicate
      * classes should be loaded normally.
      */
     private final String prefix;
     private final Set<JarFile> jars;
     public ParallelWorldClassLoader(ClassLoader parent,String prefix) {
         super(parent);
         this.prefix = prefix;
         jars = Collections.synchronizedSet(new HashSet<JarFile>());
     }
     protected Class findClass(String name) throws ClassNotFoundException {
         StringBuffer sb = new StringBuffer(name.length()+prefix.length()+6);
         sb.append(prefix).append(name.replace('.','/')).append(".class");
         URL u  = getParent().getResource(sb.toString());
         if (u == null) {
             throw new ClassNotFoundException(name);
         }
         InputStream is = null;
         URLConnection con = null;
         try {
             con = u.openConnection();
             is = con.getInputStream();
         } catch (IOException ioe) {
             throw new ClassNotFoundException(name);
         }
         if (is==null)
             throw new ClassNotFoundException(name);
         try {
             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             byte[] buf = new byte[1024];
             int len;
             while((len=is.read(buf))>=0)
                 baos.write(buf,0,len);
             buf = baos.toByteArray();
             int packIndex = name.lastIndexOf('.');
             if (packIndex != -1) {
                 String pkgname = name.substring(0, packIndex);
                 // Check if package already loaded.
                 Package pkg = getPackage(pkgname);
                 if (pkg == null) {
                     definePackage(pkgname, null, null, null, null, null, null, null);
                 }
             }
             return defineClass(name,buf,0,buf.length);
         } catch (IOException e) {
             throw new ClassNotFoundException(name,e);
         } finally {
             try {
                 if (con != null && con instanceof JarURLConnection) {
                     jars.add(((JarURLConnection) con).getJarFile());
                 }
             } catch (IOException ioe) {
                 //ignore
             }
             if (is != null) {
                 try {
                     is.close();
                 } catch (IOException ioe) {
                     //ignore
                 }
             }
         }
     }
     @Override
     protected URL findResource(String name) {
         URL u = getParent().getResource(prefix + name);
         if (u != null) {
             try {
                 jars.add(new JarFile(new File(toJarUrl(u).toURI())));
             } catch (URISyntaxException ex) {
                 Logger.getLogger(ParallelWorldClassLoader.class.getName()).log(Level.WARNING, null, ex);
             } catch (IOException ex) {
                 Logger.getLogger(ParallelWorldClassLoader.class.getName()).log(Level.WARNING, null, ex);
             } catch (ClassNotFoundException ex) {
                 //ignore - not a jar
             }
         }
         return u;
     }
     @Override
     protected Enumeration<URL> findResources(String name) throws IOException {
         Enumeration<URL> en = getParent().getResources(prefix + name);
         while (en.hasMoreElements()) {
             try {
                 jars.add(new JarFile(new File(toJarUrl(en.nextElement()).toURI())));
             } catch (URISyntaxException ex) {
                 //should not happen
                 Logger.getLogger(ParallelWorldClassLoader.class.getName()).log(Level.WARNING, null, ex);
             } catch (IOException ex) {
                 Logger.getLogger(ParallelWorldClassLoader.class.getName()).log(Level.WARNING, null, ex);
             } catch (ClassNotFoundException ex) {
                 //ignore - not a jar
             }
         }
         return en;
     }
     public synchronized void close() throws IOException {
         for (JarFile jar : jars) {
             jar.close();
         }
     }
     /**
      * Given the URL inside jar, returns the URL to the jar itself.
      */
     public static URL toJarUrl(URL res) throws ClassNotFoundException, MalformedURLException {
         String url = res.toExternalForm();
         if(!url.startsWith("jar:"))
             throw new ClassNotFoundException("Loaded outside a jar "+url);
         url = url.substring(4); // cut off jar:
         url = url.substring(0,url.lastIndexOf('!'));    // cut off everything after '!'
         url = url.replaceAll(" ", "%20"); // support white spaces in path
         return new URL(url);
     }
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/istack/internal/tools/ParallelWorldClassLoader.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/istack/internal/tools/ParallelWorldClassLoader.java