001/*
002 * (C) Copyright 2006-2016 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019package org.nuxeo.ecm.core.query.sql;
020
021import java.io.Reader;
022import java.io.StringReader;
023
024import org.nuxeo.common.utils.ExceptionUtils;
025import org.nuxeo.ecm.core.query.QueryParseException;
026import org.nuxeo.ecm.core.query.sql.model.SQLQuery;
027import org.nuxeo.ecm.core.query.sql.parser.Scanner;
028import org.nuxeo.ecm.core.query.sql.parser.parser;
029
030/**
031 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
032 */
033public final class SQLQueryParser {
034
035    // Utility class
036    private SQLQueryParser() {
037    }
038
039    public static SQLQuery parse(Reader reader) throws QueryParseException {
040        try {
041            Scanner scanner = new Scanner(reader);
042            parser parser = new parser(scanner);
043            return (SQLQuery) parser.parse().value;
044        } catch (QueryParseException e) {
045            throw e;
046        } catch (Exception e) { // stupid CUPS API throws Exception
047            throw new QueryParseException(ExceptionUtils.runtimeException(e));
048        }
049    }
050
051    public static SQLQuery parse(String string) throws QueryParseException {
052        SQLQuery query = parse(new StringReader(string));
053        query.setQueryString(string);
054        return query;
055    }
056
057}