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GEARS Runtime Runner

There is a newer version: 1.17.1

package com.xlrit.gears.runner.runnertarget;

import org.eclipse.jdt.core.formatter.CodeFormatter;
import org.eclipse.jdt.internal.formatter.DefaultCodeFormatter;
import org.eclipse.jdt.internal.formatter.DefaultCodeFormatterOptions;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.Document;
import org.eclipse.text.edits.TextEdit;

public class JavaFormatter {
	public static String format(String source) throws BadLocationException {
		DefaultCodeFormatterOptions options = new DefaultCodeFormatterOptions(null);
		options.page_width = 180;
		options.comment_line_length = 180;
		options.continuation_indentation = 1;
		// need to create a new formatter since it's not thread-safe
		CodeFormatter fmt = new DefaultCodeFormatter(options);
		int kind = CodeFormatter.K_COMPILATION_UNIT | CodeFormatter.F_INCLUDE_COMMENTS;
		TextEdit edit = fmt.format(kind, source, 0, source.length(), 0, "\n");
		if (edit == null) throw new IllegalArgumentException("Invalid java syntax for formatting.");

		Document doc = new Document(source);
		edit.apply(doc);
		return doc.get();
	}
}