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-rw-r--r--infrastructure/net.appjet.common/util/ClassReload.java263
1 files changed, 0 insertions, 263 deletions
diff --git a/infrastructure/net.appjet.common/util/ClassReload.java b/infrastructure/net.appjet.common/util/ClassReload.java
deleted file mode 100644
index 3fbc480..0000000
--- a/infrastructure/net.appjet.common/util/ClassReload.java
+++ /dev/null
@@ -1,263 +0,0 @@
-/**
- * Copyright 2009 Google Inc.
- *
- * 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 net.appjet.common.util;
-
-import java.io.*;
-import java.util.*;
-import java.lang.reflect.*;
-
-public class ClassReload {
-
- /**
- * To use: Optionally call initCompilerArgs, just like command-line
- * starting after "scalac" or "fsc", do not use "-d", you may
- * want to use "-classpath"/"-cp", no source files. Then call
- * compile(...). Then load classes. isUpToDate() will tell you
- * if source files have changed since compilation. If you want
- * to compile again, use recompile() to create a new class-loader so that
- * you can have new versions of existing classes. The class-loader
- * behavior is to load classes that were generated during compilation
- * using the output of compilation, and delegate all other classes to
- * the parent loader.
- */
- public static class ScalaSourceClassLoader extends ClassLoader {
- public ScalaSourceClassLoader(ClassLoader parent) {
- super(parent);
- }
- public ScalaSourceClassLoader() {
- this(ScalaSourceClassLoader.class.getClassLoader());
- }
-
- private List<String> compilerArgs = Collections.emptyList();
- private List<String> sourceFileList = Collections.emptyList();
-
- private Map<File,Long> sourceFileMap = new HashMap<File,Long>();
- private Map<String,byte[]> outputFileMap = new HashMap<String,byte[]>();
-
- private boolean successfulCompile = false;
-
- public void initCompilerArgs(String... args) {
- compilerArgs = new ArrayList<String>();
- for(String a : args) compilerArgs.add(a);
- }
-
- public boolean compile(String... sourceFiles) {
- sourceFileList = new ArrayList<String>();
- for(String a : sourceFiles) sourceFileList.add(a);
-
- sourceFileMap.clear();
- outputFileMap.clear();
-
- File tempDir = makeTemporaryDir();
- try {
- List<String> argsToPass = new ArrayList<String>();
- argsToPass.add("-d");
- argsToPass.add(tempDir.getAbsolutePath());
- argsToPass.addAll(compilerArgs);
- for(String sf : sourceFileList) {
- File f = new File(sf).getAbsoluteFile();
- sourceFileMap.put(f, f.lastModified());
- argsToPass.add(f.getPath());
- }
- String[] argsToPassArray = argsToPass.toArray(new String[0]);
-
- int compileResult = invokeFSC(argsToPassArray);
-
- if (compileResult != 0) {
- successfulCompile = false;
- return false;
- }
-
- for(String outputFile : listRecursive(tempDir)) {
- outputFileMap.put(outputFile,
- getFileBytes(new File(tempDir, outputFile)));
- }
-
- successfulCompile = true;
- return true;
- }
- finally {
- deleteRecursive(tempDir);
- }
- }
-
- public ScalaSourceClassLoader recompile() {
- ScalaSourceClassLoader sscl = new ScalaSourceClassLoader(getParent());
- sscl.initCompilerArgs(compilerArgs.toArray(new String[0]));
- sscl.compile(sourceFileList.toArray(new String[0]));
- return sscl;
- }
-
- public boolean isSuccessfulCompile() {
- return successfulCompile;
- }
-
- public boolean isUpToDate() {
- for(Map.Entry<File,Long> entry : sourceFileMap.entrySet()) {
- long mod = entry.getKey().lastModified();
- if (mod == 0 || mod > entry.getValue()) {
- return false;
- }
- }
- return true;
- }
-
- @Override protected synchronized Class<?> loadClass(String name,
- boolean resolve)
- throws ClassNotFoundException {
-
- // Based on java.lang.ClassLoader.loadClass(String,boolean)
-
- // First, check if the class has already been loaded
- Class<?> c = findLoadedClass(name);
- if (c == null) {
- String fileName = name.replace('.','/')+".class";
- if (outputFileMap.containsKey(fileName)) {
- // define it ourselves
- byte b[] = outputFileMap.get(fileName);
- c = defineClass(name, b, 0, b.length);
- }
- }
- if (c != null) {
- if (resolve) {
- resolveClass(c);
- }
- return c;
- }
- else {
- // use super behavior
- return super.loadClass(name, resolve);
- }
- }
- }
-
- private static byte[] readStreamFully(InputStream in) throws IOException {
- InputStream from = new BufferedInputStream(in);
- ByteArrayOutputStream to = new ByteArrayOutputStream(in.available());
- ferry(from, to);
- return to.toByteArray();
- }
-
- private static void ferry(InputStream from, OutputStream to)
- throws IOException {
-
- byte[] buf = new byte[1024];
- boolean done = false;
- while (! done) {
- int numRead = from.read(buf);
- if (numRead < 0) {
- done = true;
- }
- else {
- to.write(buf, 0, numRead);
- }
- }
- from.close();
- to.close();
- }
-
- private static Class<?> classForName(String name) {
- try {
- return Class.forName(name);
- }
- catch (ClassNotFoundException e) {
- throw new RuntimeException(e);
- }
- }
-
- static boolean deleteRecursive(File f) {
- if(f.exists()) {
- File[] files = f.listFiles();
- for(File g : files) {
- if(g.isDirectory()) {
- deleteRecursive(g);
- }
- else {
- g.delete();
- }
- }
- }
- return f.delete();
- }
-
- static byte[] getFileBytes(File f) {
- try {
- return readStreamFully(new FileInputStream(f));
- }
- catch (IOException e) {
- throw new RuntimeException(e);
- }
- }
-
- static List<String> listRecursive(File dir) {
- List<String> L = new ArrayList<String>();
- listRecursive(dir, "", L);
- return L;
- }
-
- static void listRecursive(File dir, String prefix, Collection<String> drop) {
- for(File f : dir.listFiles()) {
- if (f.isDirectory()) {
- listRecursive(f, prefix + f.getName() + "/", drop);
- }
- else {
- drop.add(prefix + f.getName());
- }
- }
- }
-
- static File makeTemporaryDir() {
- try {
- File f = File.createTempFile("ajclsreload", "").getAbsoluteFile();
- if (! f.delete())
- throw new RuntimeException("error creating temp dir");
- if (! f.mkdir())
- throw new RuntimeException("error creating temp dir");
- return f;
- }
- catch (IOException e) {
- throw new RuntimeException("error creating temp dir");
- }
- }
-
- private static int invokeFSC(String[] args) {
- try {
- Class<?> fsc =
- Class.forName("scala.tools.nsc.StandardCompileClient");
- Object compiler = fsc.newInstance();
- Method main0Method = fsc.getMethod("main0", String[].class);
- return (Integer)main0Method.invoke(compiler, (Object)args);
- }
- catch (ClassNotFoundException e) { throw new RuntimeException(e); }
- catch (InstantiationException e) { throw new RuntimeException(e); }
- catch (NoSuchMethodException e) { throw new RuntimeException(e); }
- catch (IllegalAccessException e) { throw new RuntimeException(e); }
- catch (InvocationTargetException e) {
- Throwable origThrowable = e.getCause();
- if (origThrowable == null) throw new RuntimeException(e);
- else if (origThrowable instanceof Error) {
- throw (Error)origThrowable;
- }
- else if (origThrowable instanceof RuntimeException) {
- throw (RuntimeException)origThrowable;
- }
- else {
- throw new RuntimeException(origThrowable);
- }
- }
- }
-} \ No newline at end of file
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