Examples with CQLParser org.z3950.zing.cql.CQLParser used on opensource projects

Example 1 with CQLParser

use of org.z3950.zing.cql.CQLParser in project okapi by folio-org.

the class CQLUtilTest method reduce.

private String reduce(String input) {
    CQLParser parser = new CQLParser(CQLParser.V1POINT2);
    try {
        CQLRelation rel = new CQLRelation("=");
        CQLTermNode source = new CQLTermNode("source", rel, "kb");
        CQLNode top = parser.parse(input);
        Comparator<CQLTermNode> f = (CQLTermNode n1, CQLTermNode n2) -> n1.getIndex().equals(n2.getIndex()) ? 0 : -1;
        CQLNode res = CQLUtil.reducer(top, source, f);
        if (res == null) {
            return "null";
        } else {
            return res.toCQL();
        }
    } catch (Exception ex) {
        return "Error: " + ex.getMessage();
    }
}

Example 2 with CQLParser

use of org.z3950.zing.cql.CQLParser in project okapi by folio-org.

the class CQLUtilTest method eval.

private boolean eval(String input) {
    CQLParser parser = new CQLParser(CQLParser.V1POINT2);
    try {
        CQLRelation rel = new CQLRelation("=");
        CQLTermNode source = new CQLTermNode("source", rel, "kb");
        CQLNode top = parser.parse(input);
        Comparator<CQLTermNode> f = (CQLTermNode n1, CQLTermNode n2) -> {
            if (n1.getIndex().equals(n2.getIndex()) && !n1.getTerm().equals(n2.getTerm())) {
                return -1;
            }
            return 0;
        };
        return CQLUtil.eval(top, source, f);
    } catch (Exception ex) {
        return false;
    }
}

Example 3 with CQLParser

use of org.z3950.zing.cql.CQLParser in project raml-module-builder by folio-org.

the class CQL2PgJSON method toSql.

/**
 * Convert the CQL query into a SQL query and return the WHERE and the ORDER BY clause.
 * @param cql  the query to convert
 * @return SQL query
 * @throws QueryValidationException
 */
public SqlSelect toSql(String cql) throws QueryValidationException {
    try {
        CQLParser parser = new CQLParser();
        CQLNode node = parser.parse(cql);
        return toSql(node);
    } catch (IOException | CQLParseException e) {
        throw new QueryValidationException(e);
    }
}

Example 4 with CQLParser

use of org.z3950.zing.cql.CQLParser in project raml-module-builder by folio-org.

the class CQL2PgJSON method cql2pgJson.

/**
 * Return an SQL WHERE clause for the CQL expression.
 * @param cql  CQL expression to convert
 * @return SQL WHERE clause, without leading "WHERE ", may contain "ORDER BY" clause
 * @throws QueryValidationException  when parsing or validating cql fails
 *
 * @deprecated use toSql instead
 */
@Deprecated
public String cql2pgJson(String cql) throws QueryValidationException {
    try {
        CQLParser parser = new CQLParser();
        CQLNode node = parser.parse(cql);
        return pg(node);
    } catch (IOException | CQLParseException e) {
        throw new QueryValidationException(e);
    }
}

Example 5 with CQLParser

use of org.z3950.zing.cql.CQLParser in project raml-module-builder by folio-org.

the class PgUtil method getSortNode.

/**
 * Return the sort node from the sortBy clause of the cql query, or null if no
 * sortBy clause exists or cql is invalid.
 * @param cql  the CQL query to parse
 * @return sort node, or null
 */
static CQLSortNode getSortNode(String cql) {
    try {
        CQLParser parser = new CQLParser();
        CQLNode node = parser.parse(cql);
        return getSortNode(node);
    } catch (IOException | CQLParseException | NullPointerException e) {
        return null;
    }
}