/**
* Construct a {@code Formatter} given Java compilation unit. Parses the code; builds a {@link
* JavaInput} and the corresponding {@link JavaOutput}.
*
* @param javaInput the input, a Java compilation unit
* @param javaOutput the {@link JavaOutput}
* @param maxWidth the maximum formatted width
* @param errors mutable list to receive errors
* @param indentationMultiplier the multiplier for the unit of indent; the default is 1
*/
static void format(
JavaInput javaInput,
JavaOutput javaOutput,
int maxWidth,
List<FormatterDiagnostic> errors,
int indentationMultiplier) {
ASTParser parser = ASTParser.newParser(AST.JLS8);
parser.setSource(javaInput.getText().toCharArray());
@SuppressWarnings("unchecked") // safe by specification
Map<String, String> options = JavaCore.getOptions();
JavaCore.setComplianceOptions(JavaCore.VERSION_1_8, options);
parser.setCompilerOptions(options);
CompilationUnit unit = (CompilationUnit) parser.createAST(null);
javaInput.setCompilationUnit(unit);
if (unit.getMessages().length > 0) {
for (Message message : unit.getMessages()) {
errors.add(javaInput.createDiagnostic(message.getStartPosition(), message.getMessage()));
}
return;
}
OpsBuilder builder = new OpsBuilder(javaInput, javaOutput, errors);
// Output compilation unit.
new JavaInputAstVisitor(builder, indentationMultiplier).visit(unit);
builder.sync(javaInput.getText().length());
builder.drain();
Doc doc = new DocBuilder().withOps(builder.build()).build();
doc.computeBreaks(javaOutput.getCommentsHelper(), maxWidth, new Doc.State(+0, 0, 0));
doc.write(javaOutput);
javaOutput.flush();
}
private static RangeSet<Integer> characterRangesToTokenRanges(
JavaInput javaInput, List<Range<Integer>> characterRanges) throws FormatterException {
RangeSet<Integer> tokenRangeSet = TreeRangeSet.create();
for (Range<Integer> characterRange0 : characterRanges) {
Range<Integer> characterRange = characterRange0.canonical(DiscreteDomain.integers());
tokenRangeSet.add(
javaInput.characterRangeToTokenRange(
characterRange.lowerEndpoint(),
characterRange.upperEndpoint() - characterRange.lowerEndpoint()));
}
return tokenRangeSet;
}