Java tutorial
package com.sourcesense.ant.dbdep.task.dao; /* * Copyright 2008 Sourcesense * 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. */ import java.sql.ResultSet; import java.sql.SQLException; import java.util.Iterator; import java.util.List; import javax.sql.DataSource; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.dao.DataAccessException; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.PreparedStatementSetter; import org.springframework.jdbc.core.ResultSetExtractor; import com.sourcesense.ant.dbdep.task.dataobject.DependencyDO; /** * * @author Piergiorgio Lucidi * */ public class DbDepDao implements IDbDepDao { private static Log log = LogFactory.getLog(DbDepDao.class); private String psInsert; private String psSelect; private JdbcTemplate jdbcTemplate; public void setDs(DataSource ds) { this.jdbcTemplate = new JdbcTemplate(ds); } public void insertDependencies(List dependencies) { int effect = -1; Iterator i = dependencies.iterator(); while (i.hasNext()) { DependencyDO dependency = (DependencyDO) i.next(); if (!existDependency(dependency)) { try { effect = this.jdbcTemplate.update(psInsert, new Object[] { dependency.getProject(), dependency.getEnvironment(), dependency.getName(), dependency.getVersion() }); } catch (DataAccessException e) { log.error("Error during storing this dependency: " + dependency, e); throw new RuntimeException("Error during storing this dependency: " + dependency, e); } if (effect == 0) { log.error("Error during storing this dependency: " + dependency); throw new RuntimeException("Error during storing this dependency: " + dependency); } log.info("dependency: " + dependency + " was stored correcly"); } log.info("dependency: " + dependency + " was already stored"); } } private boolean existDependency(final DependencyDO dependency) { Boolean result = new Boolean(false); try { result = (Boolean) this.jdbcTemplate.query(psSelect, new PreparedStatementSetter() { public void setValues(java.sql.PreparedStatement ps) throws java.sql.SQLException { ps.setString(1, dependency.getProject()); ps.setString(2, dependency.getEnvironment()); ps.setString(3, dependency.getName()); ps.setString(4, dependency.getVersion()); }; }, new ResultSetExtractor() { public Object extractData(ResultSet rs) throws SQLException, DataAccessException { if (rs != null && rs.next()) return new Boolean(true); else return new Boolean(false); } }); } catch (DataAccessException e) { log.error("Error during checking dependency on this query: " + "" + psSelect + " | dependency: " + dependency, e); throw new RuntimeException("Error during checking dependency on this query: " + "" + psSelect + " | dependency: " + dependency, e); } return result.booleanValue(); } public void setPsInsert(String psInsert) { this.psInsert = psInsert; } public void setPsSelect(String psSelect) { this.psSelect = psSelect; } }