Examples with BqsLexer org.codice.alliance.nsili.common.grammar.BqsLexer used on opensource projects

Example 1 with BqsLexer

use of org.codice.alliance.nsili.common.grammar.BqsLexer in project alliance by codice.

the class BqsConverter method convertBQSToDDF.

public Filter convertBQSToDDF(String query) {
    query = query.trim();
    LOGGER.debug("Original Query: {}", query);
    ANTLRInputStream inputStream = new ANTLRInputStream(query);
    // transforms characters into tokens
    BqsLexer lex = new BqsLexer(inputStream);
    // a token stream
    CommonTokenStream tokens = new CommonTokenStream(lex);
    // transforms tokens into parse trees
    BqsParser parser = new BqsParser(tokens);
    BqsTreeWalkerListener bqsListener = new BqsTreeWalkerListener(filterBuilder);
    ParseTree tree = parser.query();
    ParseTreeWalker.DEFAULT.walk(bqsListener, tree);
    Filter filter = bqsListener.getFilter();
    if (filter != null && StringUtils.isNotBlank(filter.toString())) {
        LOGGER.debug("Parsed Query: {}", filter);
    } else {
        filter = filterBuilder.attribute(Metacard.ANY_TEXT).is().text("*");
        LOGGER.debug("After parsing filter, didn't have any query parameters. Defaulting to everything search: {}", filter);
    }
    return filter;
}