plugins/org.eclipse.dltk.ruby.formatter/src/org/eclipse/dltk/ruby/formatter/internal/RubyParser.java

package org.eclipse.dltk.ruby.formatter.internal;

import org.eclipse.dltk.ruby.formatter.lexer.ILexerReader;
import org.eclipse.dltk.ruby.formatter.lexer.StringLexerReader;
import org.eclipse.dltk.ui.formatter.FormatterSyntaxProblemException;
import org.jruby.common.NullWarnings;
import org.jruby.lexer.yacc.LexerSource;
import org.jruby.lexer.yacc.SyntaxException;
import org.jruby.parser.DefaultRubyParser;
import org.jruby.parser.RubyParserConfiguration;
import org.jruby.parser.RubyParserPool;
import org.jruby.parser.RubyParserResult;

/**
 * Serves as a simple facade for all the parsing magic.
 */
public class RubyParser {

	public static RubyParserResult parse(String content)
			throws FormatterSyntaxProblemException {
		return parse(new StringLexerReader(content));
	}

	public static RubyParserResult parse(ILexerReader content)
			throws FormatterSyntaxProblemException {
		final RubyParserConfiguration configuration = new RubyParserConfiguration();
		final RubyParserPool parserPool = RubyParserPool.getInstance();
		final DefaultRubyParser parser = parserPool.borrowParser();
		try {
			parser.setWarnings(new NullWarnings());
			final LexerSource source = LexerSource.getSource(FILENAME, content);
			final RubyParserResult result = parser.parse(configuration, source);
			return result;
		} catch (SyntaxException e) {
			throw new FormatterSyntaxProblemException(e.getMessage(), e);
		} finally {
			parserPool.returnParser(parser);
		}
	}

	private static final String FILENAME = ""; //$NON-NLS-1$

}