public static Map<Lang, Result> convertFromFiles(
ClassLoader loader, List<Lang> lang, String file, String fqn, String method)
throws Exception {
DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
StandardJavaFileManager manager = javac.getStandardFileManager(diagnostics, locale, charset);
Iterable<? extends JavaFileObject> fileObjects = manager.getJavaFileObjects(file);
StringWriter out = new StringWriter();
JavaCompiler.CompilationTask task =
javac.getTask(
out,
manager,
diagnostics,
Collections.<String>emptyList(),
Collections.<String>emptyList(),
fileObjects);
task.setLocale(locale);
ConvertingProcessor processor = new ConvertingProcessor(lang, fqn, method);
task.setProcessors(Collections.<Processor>singletonList(processor));
if (task.call()) {
return processor.getResults();
} else {
StringWriter message = new StringWriter();
PrintWriter writer = new PrintWriter(message);
writer.append("Compilation of ").append(file).println(" failed:");
for (Diagnostic<? extends JavaFileObject> diagnostic : diagnostics.getDiagnostics()) {
writer.append(diagnostic.getMessage(locale));
}
writer.println("console:");
writer.append(out.getBuffer());
throw new Exception(message.toString());
}
}
/**
* Compiles the input file and generates the output class file.
*
* @param fullFilePath input .java file path.
* @return class file path.
*/
public static String compileFile(File fullFilePath) throws IOException {
Preconditions.checkArgument(fullFilePath != null && fullFilePath.isFile());
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
Preconditions.checkNotNull(compiler);
DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnostics, null, null);
Iterable<? extends JavaFileObject> compilationUnit =
fileManager.getJavaFileObjectsFromFiles(Arrays.asList(fullFilePath));
List<String> args = Arrays.asList("-Xlint:none");
boolean result =
compiler.getTask(null, fileManager, diagnostics, args, null, compilationUnit).call();
String msg = "";
if (!result) {
for (Diagnostic diagnostic : diagnostics.getDiagnostics()) {
msg +=
String.format(
"Error on line %d in %s%n",
diagnostic.getLineNumber(), diagnostic.getMessage(null));
}
tracer.err(msg);
}
fileManager.close();
return msg;
}
public TestRun run() {
StringWriter output = new StringWriter();
DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
if (debug) {
System.out.printf(
"TestInput.run:%n options: %s%n processors: %s%n files: %s%n",
this.options, this.processors, this.files);
}
JavaCompiler.CompilationTask task =
compiler.getTask(
output, fileManager, diagnostics, this.options, this.processors, this.files);
/*
* In Eclipse, std out and std err for multiple tests appear as one
* long stream. When selecting a specific failed test, one sees the
* expected/unexpected messages, but not the std out/err messages from
* that particular test. Can we improve this somehow?
*/
Boolean result = task.call();
return new TestRun(result, output.toString(), diagnostics.getDiagnostics());
}
@NotNull
private static String errorsToString(
@NotNull DiagnosticCollector<JavaFileObject> diagnosticCollector, boolean humanReadable) {
StringBuilder builder = new StringBuilder();
for (javax.tools.Diagnostic<? extends JavaFileObject> diagnostic :
diagnosticCollector.getDiagnostics()) {
if (diagnostic.getKind() != javax.tools.Diagnostic.Kind.ERROR) continue;
if (humanReadable) {
builder.append(diagnostic).append("\n");
} else {
builder
.append(diagnostic.getSource().getName())
.append(":")
.append(diagnostic.getLineNumber())
.append(":")
.append(diagnostic.getColumnNumber())
.append(":")
.append(diagnostic.getCode())
.append("\n");
}
}
return builder.toString();
}
