Examples with Expression org.apache.atlas.query.Expressions.Expression used on opensource projects

Example 1 with Expression

use of org.apache.atlas.query.Expressions.Expression in project incubator-atlas by apache.

the class EntityDiscoveryService method toGremlinQuery.

private GremlinQuery toGremlinQuery(String query, int limit, int offset) throws AtlasBaseException {
    QueryParams params = validateSearchParams(limit, offset);
    Either<NoSuccess, Expression> either = QueryParser.apply(query, params);
    if (either.isLeft()) {
        throw new AtlasBaseException(DISCOVERY_QUERY_FAILED, query);
    }
    Expression expression = either.right().get();
    Expression validExpression = QueryProcessor.validate(expression);
    GremlinQuery gremlinQuery = new GremlinTranslator(validExpression, graphPersistenceStrategy).translate();
    if (LOG.isDebugEnabled()) {
        LOG.debug("Translated Gremlin Query: {}", gremlinQuery.queryStr());
    }
    return gremlinQuery;
}