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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.annotationProcessors;
import org.mozilla.gecko.annotationProcessors.classloader.AnnotatableEntity;
import org.mozilla.gecko.annotationProcessors.classloader.ClassWithOptions;
import org.mozilla.gecko.annotationProcessors.classloader.IterableJarLoadingURLClassLoader;
import org.mozilla.gecko.annotationProcessors.utils.GeneratableElementIterator;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
public class AnnotationProcessor {
public static final String GENERATED_COMMENT =
"// GENERATED CODE\n" +
"// Generated by the Java program at /build/annotationProcessors at compile time\n" +
"// from annotations on Java methods. To update, change the annotations on the\n" +
"// corresponding Java methods and rerun the build. Manually updating this file\n" +
"// will cause your build to fail.\n" +
"\n";
private static final StringBuilder headerFile = new StringBuilder(GENERATED_COMMENT);
private static final StringBuilder implementationFile = new StringBuilder(GENERATED_COMMENT);
private static final StringBuilder nativesFile = new StringBuilder(GENERATED_COMMENT);
public static void main(String[] args) {
// We expect a list of jars on the commandline. If missing, whinge about it.
if (args.length <= 2) {
System.err.println("Usage: java AnnotationProcessor outprefix jarfiles ...");
System.exit(1);
}
final String OUTPUT_PREFIX = args[0];
final String SOURCE_FILE = OUTPUT_PREFIX + "JNIWrappers.cpp";
final String HEADER_FILE = OUTPUT_PREFIX + "JNIWrappers.h";
final String NATIVES_FILE = OUTPUT_PREFIX + "JNINatives.h";
System.out.println("Processing annotations...");
// We want to produce the same output as last time as often as possible. Ordering of
// generated statements, therefore, needs to be consistent.
final String[] jars = Arrays.copyOfRange(args, 1, args.length);
Arrays.sort(jars);
// Start the clock!
long s = System.currentTimeMillis();
// Get an iterator over the classes in the jar files given...
Iterator<ClassWithOptions> jarClassIterator = IterableJarLoadingURLClassLoader.getIteratorOverJars(jars);
headerFile.append(
"#ifndef " + getHeaderGuardName(HEADER_FILE) + "\n" +
"#define " + getHeaderGuardName(HEADER_FILE) + "\n" +
"\n" +
"#include \"mozilla/jni/Refs.h\"\n" +
"\n" +
"namespace mozilla {\n" +
"namespace java {\n" +
"\n");
implementationFile.append(
"#include \"" + HEADER_FILE + "\"\n" +
"#include \"mozilla/jni/Accessors.h\"\n" +
"\n" +
"namespace mozilla {\n" +
"namespace java {\n" +
"\n");
nativesFile.append(
"#ifndef " + getHeaderGuardName(NATIVES_FILE) + "\n" +
"#define " + getHeaderGuardName(NATIVES_FILE) + "\n" +
"\n" +
"#include \"" + HEADER_FILE + "\"\n" +
"#include \"mozilla/jni/Natives.h\"\n" +
"\n" +
"namespace mozilla {\n" +
"namespace java {\n" +
"\n");
while (jarClassIterator.hasNext()) {
generateClass(jarClassIterator.next());
}
implementationFile.append(
"} /* java */\n" +
"} /* mozilla */\n");
headerFile.append(
"} /* java */\n" +
"} /* mozilla */\n" +
"#endif // " + getHeaderGuardName(HEADER_FILE) + "\n");
nativesFile.append(
"} /* java */\n" +
"} /* mozilla */\n" +
"#endif // " + getHeaderGuardName(NATIVES_FILE) + "\n");
writeOutputFile(SOURCE_FILE, implementationFile);
writeOutputFile(HEADER_FILE, headerFile);
writeOutputFile(NATIVES_FILE, nativesFile);
long e = System.currentTimeMillis();
System.out.println("Annotation processing complete in " + (e - s) + "ms");
}
private static void generateClass(final ClassWithOptions annotatedClass) {
// Get an iterator over the appropriately generated methods of this class
final GeneratableElementIterator methodIterator
= new GeneratableElementIterator(annotatedClass);
final ClassWithOptions[] innerClasses = methodIterator.getInnerClasses();
if (!methodIterator.hasNext() && innerClasses.length == 0) {
return;
}
final CodeGenerator generatorInstance = new CodeGenerator(annotatedClass);
generatorInstance.generateClasses(innerClasses);
// Iterate all annotated members in this class..
while (methodIterator.hasNext()) {
AnnotatableEntity aElementTuple = methodIterator.next();
switch (aElementTuple.mEntityType) {
case METHOD:
generatorInstance.generateMethod(aElementTuple);
break;
case NATIVE:
generatorInstance.generateNative(aElementTuple);
break;
case FIELD:
generatorInstance.generateField(aElementTuple);
break;
case CONSTRUCTOR:
generatorInstance.generateConstructor(aElementTuple);
break;
}
}
headerFile.append(generatorInstance.getHeaderFileContents());
implementationFile.append(generatorInstance.getWrapperFileContents());
nativesFile.append(generatorInstance.getNativesFileContents());
for (ClassWithOptions innerClass : innerClasses) {
generateClass(innerClass);
}
}
private static String getHeaderGuardName(final String name) {
return name.replaceAll("\\W", "_");
}
private static void writeOutputFile(final String name,
final StringBuilder content) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(name);
outStream.write(content.toString().getBytes());
} catch (IOException e) {
System.err.println("Unable to write " + name + ". Perhaps a permissions issue?");
e.printStackTrace(System.err);
} finally {
if (outStream != null) {
try {
outStream.close();
} catch (IOException e) {
System.err.println("Unable to close outStream due to "+e);
e.printStackTrace(System.err);
}
}
}
}
}
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