jdk8-mips64-public/langtools: test/tools/javac/api/evalexpr/MemoryFileManager.java@7909abb85562 (annotated)

test/tools/javac/api/evalexpr/MemoryFileManager.java@7909abb85562 (annotated)

test/tools/javac/api/evalexpr/MemoryFileManager.java

Wed, 14 Nov 2018 10:18:25 -0800

author: diazhou
date: Wed, 14 Nov 2018 10:18:25 -0800
changeset 3762: 7909abb85562
parent 581: f2fdd52e4e87
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

Added tag jdk8u201-b04 for changeset a7f48b9dfb82

 /*
  * Copyright (c) 2005, 2006, 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.
  *
  * 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 evalexpr;
 import java.io.ByteArrayOutputStream;
 import java.io.FilterOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.Reader;
 import java.io.StringReader;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.CharBuffer;
 import java.util.HashMap;
 import java.util.Map;
 import javax.tools.*;
 import javax.tools.JavaFileObject.Kind;
 /**
  * A file manager for compiling strings to byte arrays.
  * This file manager delegates to another file manager
  * to lookup classes on boot class path.
  *
  * <p><b>This is NOT part of any supported API.
  * 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></p>
  * @author Peter von der Ah&eacute;
  */
 public final class MemoryFileManager extends ForwardingJavaFileManager {
     /**
      * Maps binary class names to class files stored as byte arrays.
      */
     private Map<String, byte[]> classes;
     /**
      * Creates a JavaFileObject representing the given compilation unit.
      * @param name a name representing this source code, for example, the name of a class
      * @param code a compilation unit (source code for a Java program)
      * @return a JavaFileObject represtenting the given compilation unit
      */
     public static JavaFileObject makeSource(String name, String code) {
         return new JavaSourceFromString(name, code);
     }
     /**
      * Construct a memory file manager which delegates to the specified
      * file manager for unknown sources.
      * @param fileManager a file manager used to look up class files on class path, etc.
      */
     public MemoryFileManager(JavaFileManager fileManager) {
         super(fileManager);
         classes = new HashMap<String, byte[]>();
     }
     /**
      * Get a class loader which first search the classes stored
      * by this file mananger.
      * @return a class loader for compiled files
      */
     @Override
     public ClassLoader getClassLoader(Location location) {
         return new ByteArrayClassLoader(classes);
     }
     @Override
     public JavaFileObject getJavaFileForOutput(Location location,
                                                String name,
                                                Kind kind,
                                                FileObject originatingSource)
         throws UnsupportedOperationException
     {
         if (originatingSource instanceof JavaSourceFromString) {
             return new JavaClassInArray(name);
         } else {
             throw new UnsupportedOperationException();
         }
     }
     protected static URI uriFromString(String uri) {
         try {
             return new URI(uri);
         } catch (URISyntaxException e) {
             throw new IllegalArgumentException(e);
         }
     }
     /**
      * A file object representing a Java class file stored in a byte array.
      */
     private class JavaClassInArray extends SimpleJavaFileObject {
         private String name;
         /**
          * Constructs a JavaClassInArray object.
          * @param name binary name of the class to be stored in this file object
          */
         JavaClassInArray(String name) {
             super(uriFromString("mfm:///" + name.replace('.','/') + Kind.CLASS.extension),
                   Kind.CLASS);
             this.name = name;
         }
         public OutputStream openOutputStream() {
             return new FilterOutputStream(new ByteArrayOutputStream()) {
                 public void close() throws IOException {
                     out.close();
                     ByteArrayOutputStream bos = (ByteArrayOutputStream)out;
                     classes.put(name, bos.toByteArray());
                     System.out.println("compiled " + name);
                 }
             };
         }
     }
     /**
      * A file object used to represent source coming from a string.
      */
     private static class JavaSourceFromString extends SimpleJavaFileObject {
         /**
          * The source code of this "file".
          */
         final String code;
         /**
          * Constructs a new JavaSourceFromString.
          * @param name the name of the compilation unit represented by this file object
          * @param code the source code for the compilation unit represented by this file object
          */
         JavaSourceFromString(String name, String code) {
             super(uriFromString("mfm:///" + name.replace('.','/') + Kind.SOURCE.extension),
                   Kind.SOURCE);
             this.code = code;
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return code;
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/api/evalexpr/MemoryFileManager.java@7909abb85562 (annotated)

test/tools/javac/api/evalexpr/MemoryFileManager.java