org.ambraproject.doi.JdbcResolverService.java Source code

Introduction

Here is the source code for org.ambraproject.doi.JdbcResolverService.java

Source

/* $HeadURL:: $
 * $Id$
 *
 * Copyright (c) 2006-2010 by Public Library of Science
 * http://plos.org
 * http://ambraproject.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.ambraproject.doi;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import javax.sql.DataSource;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * Resolver for the rdf:type of a DOI-URI.
 *
 * @author Alex Kudlick
 */
public class JdbcResolverService implements ResolverDAOService {
    private static final Logger log = LoggerFactory.getLogger(JdbcResolverService.class);
    private final JdbcTemplate jdbcTemplate;

    public JdbcResolverService(DataSource dataSource) {
        jdbcTemplate = new JdbcTemplate(dataSource);
    }

    @Override
    public boolean doiIsArticle(String doi) {
        log.debug("looking up doi {} in Article table", doi);
        int count = jdbcTemplate.queryForInt("select count(*) from article where doi = ?", new Object[] { doi });
        return count != 0;
    }

    @Override
    public AnnotationInfo getAnnotationInfo(String doi) {
        log.debug("looking up doi {} in Annotation table", doi);
        try {
            return (AnnotationInfo) jdbcTemplate.query("select an.annotationID, a.doi, an.type from annotation an "
                    + " inner join article a on an.articleID = a.articleID " + " where an.annotationURI = ?",
                    new Object[] { doi }, new RowMapper() {
                        @Override
                        public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                            return new AnnotationInfo(rs.getLong(1), //annotationId
                                    rs.getString(2), //article doi
                                    rs.getString(3) //type
                            );
                        }
                    }).get(0);
        } catch (IndexOutOfBoundsException e) {
            //no annotation
            return null;
        }
    }

}