eclipsecon08/org.eclipse.dltk.examples.python.part2/src/org/eclipse/dltk/python/internal/core/parsers/DLTKPythonErrorReporter.java

package org.eclipse.dltk.python.internal.core.parsers;

import java.util.ArrayList;
import java.util.List;

import org.antlr.runtime.MismatchedTokenException;
import org.antlr.runtime.NoViableAltException;
import org.antlr.runtime.RecognitionException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.dltk.compiler.problem.DefaultProblem;
import org.eclipse.dltk.compiler.problem.IProblemReporter;
import org.eclipse.dltk.compiler.problem.ProblemSeverities;
import org.eclipse.dltk.core.DLTKCore;

public class DLTKPythonErrorReporter {
	IProblemReporter reporter;
	DLTKTokenConverter converter;
	python_v3Parser parser;
	List problems = new ArrayList();

	public DLTKPythonErrorReporter(DLTKTokenConverter converter,
			IProblemReporter reporter, python_v3Parser parser) {
		this.converter = converter;
		this.reporter = reporter;
		this.parser = parser;
	}

	public void reportError(RecognitionException re) {
		if (reporter == null) {
			return;
		}
		String message = re.getMessage();
		if (re instanceof NoViableAltException) {
			NoViableAltException ec = (NoViableAltException) re;
			String[] messages = { "Syntax Error:" + message,
					ec.token.getText() };
			int st = this.converter.convert(ec.token).getColumn() - 1;
			String sm = ec.token.getText();
			int et = st + ((sm != null) ? sm.length() : 1);
			if (st == -1)
				return;
			// reporter.handle(CompilerOptions.OFFSET, messages, messages,
			// st, et);
			DefaultProblem defaultProblem = new DefaultProblem("", messages[0], 0,
					new String[] {}, ProblemSeverities.Error, st, et,
					ec.token.getLine());
			if( !problems.contains(defaultProblem)) {
				reporter.reportProblem(defaultProblem);
				problems.add(defaultProblem);
			}
		} else if (re instanceof MismatchedTokenException) {
			MismatchedTokenException ec = (MismatchedTokenException) re;
			if (message == null) {
				message = "mismatched input "+this.parser.getTokenErrorDisplay(ec.token);
//					return;
			}
			String[] messages = { "Syntax Error:" + message, message,
					ec.token.getText() };
			int st = this.converter.convert(ec.token).getColumn() - 1;
			String sm = ec.token.getText();
			int et = st + ((sm != null) ? sm.length() : 1);
			if (et >= this.converter.length()) {
				et = this.converter.length() - 1;
				st -= 2;
			}
			// reporter.handle(CompilerOptions.OFFSET, messages, messages,
			// st, et);
			DefaultProblem defaultProblem = new DefaultProblem("", messages[0], 0,
					new String[] {}, ProblemSeverities.Error, st, et,
					ec.line);
			if( !problems.contains(defaultProblem)) {
				reporter.reportProblem(defaultProblem);
				problems.add(defaultProblem);
			}
		} else {
			String[] messages = { "Syntax Error:" + message, message };
			int st = this.converter.convert(re.token).getColumn();
			int et = st + 1;
			// reporter.handle(CompilerOptions.OFFSET, messages, messages,
			// st, et);
			DefaultProblem defaultProblem = new DefaultProblem("", messages[0], 0,
					new String[] {}, ProblemSeverities.Error, st, et,
					re.token.getLine());
			if( !problems.contains(defaultProblem)) {
				reporter.reportProblem(defaultProblem);
				problems.add(defaultProblem);
			}
		}
	}

	public void reportThrowable(Throwable extre) {
	//	if(DLTKCore.DEBUG ) {
			extre.printStackTrace();
//		}
	}

	public void reportMessage(String msg) {
		//if( DLTKCore.DEBUG ) {
			System.err.println("PythonParser:" + msg);
		//}
	}
}