org.apidesign.bck2brwsr.vmtest.impl.GenerateZipProcessor Maven / Gradle / Ivy
/**
* Back 2 Browser Bytecode Translator
* Copyright (C) 2012-2018 Jaroslav Tulach
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. Look for COPYING file in the top folder.
* If not, see http://opensource.org/licenses/GPL-2.0.
*/
package org.apidesign.bck2brwsr.vmtest.impl;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Filer;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
import org.openide.util.lookup.ServiceProvider;
/**
*
* @author Jaroslav Tulach
*/
@ServiceProvider(service = Processor.class)
@SupportedAnnotationTypes("org.apidesign.bck2brwsr.vmtest.impl.GenerateZip")
public class GenerateZipProcessor extends AbstractProcessor {
@Override
public boolean process(Set annotations, RoundEnvironment roundEnv) {
for (Element e : roundEnv.getElementsAnnotatedWith(GenerateZip.class)) {
GenerateZip gz = e.getAnnotation(GenerateZip.class);
if (gz == null) {
continue;
}
PackageElement pe = findPackage(e);
try {
generateJar(pe, gz, e);
} catch (IOException ex) {
processingEnv.getMessager().printMessage(
Diagnostic.Kind.ERROR,
"Can't generate JAR " + gz.name() + ": " + ex.getMessage()
);
}
}
return true;
}
private static PackageElement findPackage(Element e) {
while (e.getKind() != ElementKind.PACKAGE) {
e = e.getEnclosingElement();
}
return (PackageElement)e;
}
private void generateJar(PackageElement pe, GenerateZip gz, Element e) throws IOException {
final Filer filer = processingEnv.getFiler();
FileObject res = filer.createResource(
StandardLocation.CLASS_OUTPUT,
pe.getQualifiedName().toString(),
gz.name(), e
);
OutputStream os = res.openOutputStream();
JarOutputStream jar;
if (gz.manifest().isEmpty()) {
jar = new JarOutputStream(os);
} else {
Manifest mf = new Manifest(new ByteArrayInputStream(gz.manifest().getBytes("UTF-8")));
jar = new JarOutputStream(os, mf);
}
String[] arr = gz.contents();
for (int i = 0; i < arr.length; i += 2) {
JarEntry je = new JarEntry(arr[i]);
jar.putNextEntry(je);
jar.write(arr[i + 1].getBytes("UTF-8"));
jar.closeEntry();
}
jar.close();
}
}