Examples with MyPCMStoExLexer org.palladiosimulator.pcm.stochasticexpressions.parser.MyPCMStoExLexer used on opensource projects

Example 1 with MyPCMStoExLexer

use of org.palladiosimulator.pcm.stochasticexpressions.parser.MyPCMStoExLexer in project Palladio-Editors-Sirius by PalladioSimulator.

the class PCMServices method validExpression.

/**
 * Parses an stochastic expression to determine whether it is valid.
 *
 * @param the
 *            expressionString
 * @return the validity
 */
private boolean validExpression(final String expressionString) {
    final MyPCMStoExLexer lexer = new MyPCMStoExLexer(new ANTLRStringStream(expressionString));
    final MyPCMStoExParser parser = new MyPCMStoExParser(new CommonTokenStream(lexer));
    try {
        parser.expression();
    } catch (final RecognitionException e1) {
        return false;
    }
    if (lexer.hasErrors() || parser.hasErrors()) {
        return false;
    }
    return true;
}