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/*
* Copyright (C) 2021 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.spi;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import javax.annotation.processing.Filer;
import javax.annotation.processing.Messager;
import javax.tools.Diagnostic.Kind;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
class SpiProcessorPersistence {
private final String name;
private final String path;
final Filer filer;
private final Messager logger;
SpiProcessorPersistence(String name, Filer filer, Messager logger) {
this.name = name;
this.logger = logger;
this.path = SpiProcessor.getRootPathOfServiceFiles();
this.filer = filer;
}
static CharSequence readFilerResource(FileObject resource, Messager logger, String pathName) {
try {
// Eclipse can't handle getCharContent, so we must use a reader...
return tryWithReader(resource);
} catch (FileNotFoundException e) {
return null;
} catch (IOException e) {
if (
e.getClass().getName().equals("org.eclipse.core.internal.resources.ResourceException") &&
e.getMessage() != null &&
e.getMessage().endsWith("does not exist.")) {
return null;
}
logger.printMessage(Kind.ERROR, SpiProcessor.toErrorMsg(e, pathName));
return null;
} catch (Exception other) {
// otherwise, probably javac: Some versions don't support the `openReader` method.
try {
return resource.getCharContent(true);
} catch (FileNotFoundException e) {
return null;
} catch (IOException e) {
logger.printMessage(Kind.ERROR, SpiProcessor.toErrorMsg(e, pathName));
return null;
}
}
}
private static CharSequence tryWithReader(FileObject resource) throws IOException {
StringBuilder sb = new StringBuilder();
Reader raw = resource.openReader(true);
try {
BufferedReader in = new BufferedReader(raw);
for (String line = in.readLine(); line != null; line = in.readLine()) sb.append(line).append('\n');
return sb;
} finally {
if (raw != null) raw.close();
}
}
Collection<String> tryFind() {
File dir = determineOutputLocation();
if (dir == null || !dir.isDirectory()) return Collections.emptyList();
List<String> out = new ArrayList<String>();
for (File p : dir.listFiles()) {
if (!p.isFile()) continue;
out.add(p.getName());
}
return out;
}
private File determineOutputLocation() {
FileObject resource;
try {
resource = filer.createResource(StandardLocation.CLASS_OUTPUT, "META-INF", "locator.tmp");
} catch (FileNotFoundException e) {
e.printStackTrace();
// Could happen
return null;
} catch (IOException e) {
e.printStackTrace();
logger.printMessage(Kind.NOTE, "IOException while determining output location: " + e.getMessage());
return null;
} catch (IllegalArgumentException e) {
e.printStackTrace();
// Happens when the path is invalid. For instance absolute or relative to a path
// not part of the class output folder.
//
// Due to a bug in javac for Linux, this also occurs when no output path is specified
// for javac using the -d parameter.
// See http://forums.sun.com/thread.jspa?threadID=5240999&tstart=45
// and http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6647996
return null;
}
URI uri = resource.toUri();
return new File(new File(uri).getParentFile(), "services");
}
void write(String serviceName, String value) throws IOException {
FileObject output = filer.createResource(StandardLocation.CLASS_OUTPUT, "", path + serviceName);
Writer writer = output.openWriter();
writer.write("# Generated by " + name + "\n");
writer.write("# " + new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z", Locale.US).format(new Date()) + "\n");
writer.write(value);
writer.close();
}
}
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