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Script.java
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Script.java
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package org.ruboto;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.AssetManager;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import dalvik.system.PathClassLoader;
public class Script {
private static String scriptsDir = "scripts";
private static File scriptsDirFile = null;
private String name = null;
private static Object ruby;
private static boolean initialized = false;
private static String localContextScope = "SINGLETON";
private static String localVariableBehavior = "TRANSIENT";
public static final String TAG = "RUBOTO"; // for logging
private static String JRUBY_VERSION;
/*************************************************************************************************
*
* Static Methods: ScriptingContainer config
*/
public static void setLocalContextScope(String val) {
localContextScope = val;
}
public static void setLocalVariableBehavior(String val) {
localVariableBehavior = val;
}
/*************************************************************************************************
*
* Static Methods: JRuby Execution
*/
public static final FilenameFilter RUBY_FILES = new FilenameFilter() {
public boolean accept(File dir, String fname) {
return fname.endsWith(".rb");
}
};
public static synchronized boolean isInitialized() {
return initialized;
}
public static synchronized boolean setUpJRuby(Context appContext) {
return setUpJRuby(appContext, System.out);
}
public static synchronized boolean setUpJRuby(Context appContext, PrintStream out) {
if (!initialized) {
Log.d(TAG, "Setting up JRuby runtime");
System.setProperty("jruby.bytecode.version", "1.5");
System.setProperty("jruby.interfaces.useProxy", "true");
System.setProperty("jruby.management.enabled", "false");
System.setProperty("jruby.objectspace.enabled", "false");
System.setProperty("jruby.thread.pooling", "true");
System.setProperty("jruby.native.enabled", "false");
// Uncomment these to debug Ruby source loading
// System.setProperty("jruby.debug.loadService", "true");
// System.setProperty("jruby.debug.loadService.timing", "true");
ClassLoader classLoader;
Class<?> scriptingContainerClass;
String apkName = null;
try {
scriptingContainerClass = Class.forName("org.jruby.embed.ScriptingContainer");
System.out.println("Found JRuby in this APK");
classLoader = Script.class.getClassLoader();
try {
apkName = appContext.getPackageManager().getApplicationInfo(appContext.getPackageName(), 0).sourceDir;
} catch (NameNotFoundException e) {}
} catch (ClassNotFoundException e1) {
String packageName = "org.ruboto.core";
try {
apkName = appContext.getPackageManager().getApplicationInfo(packageName, 0).sourceDir;
} catch (PackageManager.NameNotFoundException e) {
System.out.println("JRuby not found");
return false;
}
System.out.println("Found JRuby in platform APK");
if (true) {
classLoader = new PathClassLoader(apkName, Script.class.getClassLoader());
} else {
// Alternative way to get the class loader. The other way is rumoured to have memory leaks.
try {
Context platformAppContext = appContext.createPackageContext(packageName, Context.CONTEXT_INCLUDE_CODE + Context.CONTEXT_IGNORE_SECURITY);
classLoader = platformAppContext.getClassLoader();
} catch (PackageManager.NameNotFoundException e) {
System.out.println("Could not create package context even if application info could be found. Should never happen.");
return false;
}
}
try {
scriptingContainerClass = Class.forName("org.jruby.embed.ScriptingContainer", true, classLoader);
} catch (ClassNotFoundException e) {
// FIXME(uwe): ScriptingContainer not found in the platform APK...
e.printStackTrace();
return false;
}
}
try {
try {
JRUBY_VERSION = (String) Class.forName("org.jruby.runtime.Constants", true, classLoader).getDeclaredField("VERSION").get(String.class);
} catch (java.lang.NoSuchFieldException nsfex) {
nsfex.printStackTrace();
JRUBY_VERSION = "ERROR";
}
Class scopeClass = Class.forName("org.jruby.embed.LocalContextScope", true, scriptingContainerClass.getClassLoader());
Class behaviorClass = Class.forName("org.jruby.embed.LocalVariableBehavior", true, scriptingContainerClass.getClassLoader());
ruby = scriptingContainerClass
.getConstructor(scopeClass, behaviorClass)
.newInstance(Enum.valueOf(scopeClass, localContextScope),
Enum.valueOf(behaviorClass, localVariableBehavior));
Class compileModeClass = Class.forName("org.jruby.RubyInstanceConfig$CompileMode", true, classLoader);
callScriptingContainerMethod(Void.class, "setCompileMode", Enum.valueOf(compileModeClass, "OFF"));
// Class traceTypeClass = Class.forName("org.jruby.runtime.backtrace.TraceType", true, classLoader);
// Method traceTypeForMethod = traceTypeClass.getMethod("traceTypeFor", String.class);
// Object traceTypeRaw = traceTypeForMethod.invoke(null, "raw");
// callScriptingContainerMethod(Void.class, "setTraceType", traceTypeRaw);
// FIXME(uwe): Write tutorial on profiling.
// container.getProvider().getRubyInstanceConfig().setProfilingMode(mode);
// callScriptingContainerMethod(Void.class, "setClassLoader", classLoader);
Method setClassLoaderMethod = ruby.getClass().getMethod("setClassLoader", ClassLoader.class);
setClassLoaderMethod.invoke(ruby, classLoader);
Thread.currentThread().setContextClassLoader(classLoader);
String defaultCurrentDir = appContext.getFilesDir().getPath();
Log.d(TAG, "Setting JRuby current directory to " + defaultCurrentDir);
callScriptingContainerMethod(Void.class, "setCurrentDirectory", defaultCurrentDir);
if (out != null) {
Method setOutputMethod = ruby.getClass().getMethod("setOutput", PrintStream.class);
setOutputMethod.invoke(ruby, out);
Method setErrorMethod = ruby.getClass().getMethod("setError", PrintStream.class);
setErrorMethod.invoke(ruby, out);
}
String jrubyHome = "file:" + apkName + "!";
Log.i(TAG, "Setting JRUBY_HOME: " + jrubyHome);
System.setProperty("jruby.home", jrubyHome);
String extraScriptsDir = scriptsDirName(appContext);
Log.i(TAG, "Checking scripts in " + extraScriptsDir);
if (configDir(extraScriptsDir)) {
Log.i(TAG, "Added extra scripts path: " + extraScriptsDir);
}
initialized = true;
} catch (ClassNotFoundException e) {
handleInitException(e);
} catch (IllegalArgumentException e) {
handleInitException(e);
} catch (SecurityException e) {
handleInitException(e);
} catch (InstantiationException e) {
handleInitException(e);
} catch (IllegalAccessException e) {
handleInitException(e);
} catch (InvocationTargetException e) {
handleInitException(e);
} catch (NoSuchMethodException e) {
handleInitException(e);
}
}
return initialized;
}
private static void handleInitException(Exception e) {
Log.e(TAG, "Exception starting JRuby");
Log.e(TAG, e.getMessage() != null ? e.getMessage() : e.getClass().getName());
e.printStackTrace();
ruby = null;
}
@SuppressWarnings("unchecked")
public static <T> T callScriptingContainerMethod(Class<T> returnType, String methodName, Object... args) {
Class<?>[] argClasses = new Class[args.length];
for (int i = 0; i < argClasses.length; i++) {
argClasses[i] = args[i].getClass();
}
try {
Method method = ruby.getClass().getMethod(methodName, argClasses);
System.out.println("callScriptingContainerMethod: method: " + method);
T result = (T) method.invoke(ruby, args);
System.out.println("callScriptingContainerMethod: result: " + result);
return result;
} catch (RuntimeException re) {
re.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
printStackTrace(e);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
return null;
}
public static String execute(String code) {
Object result = exec(code);
return result != null ? result.toString() : "nil";
// TODO: Why is callMethod returning "main"?
// return result != null ? callMethod(result, "inspect", String.class) : "null";
}
public static Object exec(String code) {
// return callScriptingContainerMethod(Object.class, "runScriptlet", code);
try {
Method runScriptletMethod = ruby.getClass().getMethod("runScriptlet", String.class);
return runScriptletMethod.invoke(ruby, code);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
} catch (IllegalAccessException iae) {
throw new RuntimeException(iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
throw ((RuntimeException) ite.getCause());
}
}
public static void defineGlobalConstant(String name, Object object) {
put(name, object);
}
public static void put(String name, Object object) {
// callScriptingContainerMethod(Void.class, "put", name, object);
try {
Method putMethod = ruby.getClass().getMethod("put", String.class, Object.class);
putMethod.invoke(ruby, name, object);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
} catch (IllegalAccessException iae) {
throw new RuntimeException(iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
throw new RuntimeException(ite);
}
}
public static void defineGlobalVariable(String name, Object object) {
defineGlobalConstant(name, object);
}
/*************************************************************************************************
*
* Static Methods: Scripts Directory
*/
public static void setDir(String dir) {
scriptsDir = dir;
scriptsDirFile = new File(dir);
if (ruby != null) {
Log.d(TAG, "Changing JRuby current directory to " + scriptsDir);
callScriptingContainerMethod(Void.class, "setCurrentDirectory", scriptsDir);
}
}
public static String getDir() {
return scriptsDir;
}
public static File getDirFile() {
return scriptsDirFile;
}
private static void setLoadPath(List<String> loadPath) {
// callScriptingContainerMethod(Void.class, "setLoadPaths", loadPath);
try {
Method setLoadPathsMethod = ruby.getClass().getMethod("setLoadPaths", List.class);
setLoadPathsMethod.invoke(ruby, loadPath);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
} catch (IllegalAccessException iae) {
throw new RuntimeException(iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
throw new RuntimeException(ite);
}
}
private static List<String> getLoadPath() {
return callScriptingContainerMethod(List.class, "getLoadPaths");
}
public static Boolean configDir(String scriptsDir) {
if (new File(scriptsDir).exists()) {
Log.i(TAG, "Found extra scripts dir: " + scriptsDir);
setDir(scriptsDir);
exec("$:.unshift '" + scriptsDir + "' ; $:.uniq! ; p $:");
return true;
} else {
Log.i(TAG, "Extra scripts dir not present: " + scriptsDir);
return false;
}
}
private static void copyScripts(String from, File to, AssetManager assets) {
try {
byte[] buffer = new byte[8192];
for (String f : assets.list(from)) {
File dest = new File(to, f);
if (dest.exists()) {
continue;
}
Log.d(TAG, "copying file from " + from + "/" + f + " to " + dest);
if (assets.list(from + "/" + f).length == 0) {
InputStream is = assets.open(from + "/" + f);
OutputStream fos = new BufferedOutputStream(new FileOutputStream(dest), 8192);
int n;
while ((n = is.read(buffer, 0, buffer.length)) != -1) {
fos.write(buffer, 0, n);
}
is.close();
fos.close();
} else {
dest.mkdir();
copyScripts(from + "/" + f, dest, assets);
}
}
} catch (IOException iox) {
Log.e(TAG, "error copying scripts", iox);
}
}
public static void copyAssets(Context context, String directory) {
File dest = new File(scriptsDirFile.getParentFile(), directory);
if (dest.exists() || dest.mkdir()) {
copyScripts(directory, dest, context.getAssets());
} else {
throw new RuntimeException("Unable to create scripts directory: " + dest);
}
}
private static boolean isDebugBuild(Context context) {
PackageManager pm = context.getPackageManager();
PackageInfo pi;
try {
pi = pm.getPackageInfo(context.getPackageName(), 0);
return ((pi.applicationInfo.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0);
} catch (NameNotFoundException e) {
return false;
}
}
private static String scriptsDirName(Context context) {
File storageDir = null;
if (isDebugBuild(context)) {
// FIXME(uwe): Simplify this as soon as we drop support for android-7 or JRuby 1.5.6 or JRuby 1.6.2
Log.i(TAG, "JRuby VERSION: " + JRUBY_VERSION);
if (!JRUBY_VERSION.equals("1.5.6") && !JRUBY_VERSION.equals("1.6.2") && android.os.Build.VERSION.SDK_INT >= 8) {
put("script_context", context);
storageDir = (File) exec("script_context.getExternalFilesDir(nil)");
} else {
storageDir = new File(Environment.getExternalStorageDirectory(), "Android/data/" + context.getPackageName() + "/files");
Log.e(TAG, "Calculated path to sdcard the old way: " + storageDir);
}
// FIXME end
if (storageDir == null || (!storageDir.exists() && !storageDir.mkdirs())) {
Log.e(TAG,
"Development mode active, but sdcard is not available. Make sure you have added\n<uses-permission android:name='android.permission.WRITE_EXTERNAL_STORAGE' />\nto your AndroidManifest.xml file.");
storageDir = context.getFilesDir();
}
} else {
storageDir = context.getFilesDir();
}
return storageDir.getAbsolutePath() + "/scripts";
}
private static void copyScriptsIfNeeded(Context context) {
String to = scriptsDirName(context);
Log.i(TAG, "Checking scripts in " + to);
/* the if makes sure we only do this the first time */
if (configDir(to)) {
Log.i(TAG, "Copying scripts to " + to);
copyAssets(context, "scripts");
}
}
/*************************************************************************************************
*
* Constructors
*/
public Script(String name) {
this.name = name;
}
/*************************************************************************************************
*
* Attribute Access
*/
public String getName() {
return name;
}
public File getFile() {
return new File(getDir(), name);
}
public Script setName(String name) {
this.name = name;
return this;
}
public String getContents() throws IOException {
InputStream is;
if (new File(scriptsDir + "/" + name).exists()) {
is = new java.io.FileInputStream(scriptsDir + "/" + name);
} else {
is = getClass().getClassLoader().getResourceAsStream(name);
}
BufferedReader buffer = new BufferedReader(new java.io.InputStreamReader(is), 8192);
StringBuilder source = new StringBuilder();
while (true) {
String line = buffer.readLine();
if (line == null) {
break;
}
source.append(line).append("\n");
}
buffer.close();
return source.toString();
}
/*************************************************************************************************
*
* Script Actions
*/
public static String getScriptFilename() {
return callScriptingContainerMethod(String.class, "getScriptFilename");
}
public static void setScriptFilename(String name) {
callScriptingContainerMethod(Void.class, "setScriptFilename", name);
}
public String execute() throws IOException {
Script.setScriptFilename(getClass().getClassLoader().getResource(name).getPath());
return Script.execute(getContents());
}
public static void callMethod(Object receiver, String methodName, Object[] args) {
try {
Method callMethodMethod = ruby.getClass().getMethod("callMethod", Object.class, String.class, Object[].class);
callMethodMethod.invoke(ruby, receiver, methodName, args);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
} catch (IllegalAccessException iae) {
throw new RuntimeException(iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
printStackTrace(ite);
}
}
public static void callMethod(Object object, String methodName, Object arg) {
callMethod(object, methodName, new Object[] { arg });
}
public static void callMethod(Object object, String methodName) {
callMethod(object, methodName, new Object[] {});
}
@SuppressWarnings("unchecked")
public static <T> T callMethod(Object receiver, String methodName, Object[] args, Class<T> returnType) {
try {
Method callMethodMethod = ruby.getClass().getMethod("callMethod", Object.class, String.class, Object[].class, Class.class);
return (T) callMethodMethod.invoke(ruby, receiver, methodName, args, returnType);
} catch (NoSuchMethodException nsme) {
throw new RuntimeException(nsme);
} catch (IllegalAccessException iae) {
throw new RuntimeException(iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
printStackTrace(ite);
}
return null;
}
public static <T> T callMethod(Object receiver, String methodName,
Object arg, Class<T> returnType) {
return callMethod(receiver, methodName, new Object[]{arg}, returnType);
}
public static <T> T callMethod(Object receiver, String methodName,
Class<T> returnType) {
return callMethod(receiver, methodName, new Object[]{}, returnType);
}
private static void printStackTrace(Throwable t) {
PrintStream out;
try {
Method getOutputMethod = ruby.getClass().getMethod("getOutput");
out = (PrintStream) getOutputMethod.invoke(ruby);
} catch (java.lang.NoSuchMethodException nsme) {
throw new RuntimeException("ScriptingContainer#getOutput method not found.", nsme);
} catch (java.lang.IllegalAccessException iae) {
throw new RuntimeException("ScriptingContainer#getOutput method not accessable.", iae);
} catch (java.lang.reflect.InvocationTargetException ite) {
throw new RuntimeException("ScriptingContainer#getOutput failed.", ite);
}
// TODO(uwe): Simplify this when Issue #144 is resolved
try {
t.printStackTrace(out);
} catch (NullPointerException npe) {
// TODO(uwe): printStackTrace should not fail
for (java.lang.StackTraceElement ste : t.getStackTrace()) {
out.append(ste.toString() + "\n");
}
}
}
}