First go at QueryRunner and Factory<Connection> arg for QueryMapper

common/src/main/java/com/moparisthebest/jdbc/Factory.java

@@ -0,0 +1,10 @@
+package com.moparisthebest.jdbc;
+
+import java.sql.SQLException;
+
+/**
+ * Created by mopar on 7/1/17.
+ */
+public interface Factory<T> {
+	T create() throws SQLException;
+}

common/src/main/java/com/moparisthebest/jdbc/QueryRunner.java

@@ -0,0 +1,73 @@
+package com.moparisthebest.jdbc;
+
+import com.moparisthebest.jdbc.codegen.JdbcMapper;
+
+import java.sql.SQLException;
+
+import static com.moparisthebest.jdbc.TryClose.tryClose;
+
+
+/**
+ * Created by mopar on 6/30/17.
+ */
+public class QueryRunner<T extends JdbcMapper> {
+
+	private final Factory<T> factory;
+
+	public QueryRunner(final Factory<T> factory) {
+		if(factory == null)
+			throw new NullPointerException("factory must be non-null");
+		this.factory = factory;
+	}
+
+	public <E> E run(final Runner<T, E> query) throws SQLException {
+		if(query == null)
+			throw new NullPointerException("query must be non-null");
+		T dao = null;
+		try {
+			dao = factory.create();
+			return query.run(dao);
+		} finally {
+			tryClose(dao);
+		}
+	}
+
+	public <E> E runInTransaction(final Runner<T, E> query) throws SQLException {
+		if(query == null)
+			throw new NullPointerException("query must be non-null");
+		T dao = null;
+		try {
+			dao = factory.create();
+			dao.getConnection().setAutoCommit(false);
+			final E ret = query.run(dao);
+			dao.getConnection().commit();
+			return ret;
+		} catch (final Throwable e) {
+			if (dao != null) {
+				try {
+					dao.getConnection().rollback();
+				} catch(SQLException excep) {
+					// ignore to throw original
+				}
+			}
+			if(e instanceof SQLException)
+				throw (SQLException) e;
+			if(e instanceof RuntimeException)
+				throw (RuntimeException) e;
+			throw new RuntimeException("odd error should never happen", e);
+		} finally {
+			if (dao != null) {
+				try {
+					dao.getConnection().setAutoCommit(true);
+				} catch(SQLException excep) {
+					// ignore
+				}
+				tryClose(dao);
+			}
+		}
+	}
+
+	public static interface Runner<T, E> {
+		E run(T dao) throws SQLException;
+	}
+}

common/src/main/java/com/moparisthebest/jdbc/codegen/JdbcMapperFactory.java

@@ -1,24 +1,107 @@
 package com.moparisthebest.jdbc.codegen;
 
+import com.moparisthebest.jdbc.Factory;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
 import java.sql.Connection;
+import java.sql.SQLException;
 
 /**
  * Created by mopar on 5/24/17.
  */
-public abstract class JdbcMapperFactory {
+public class JdbcMapperFactory<T> implements Factory<T> {
 
 	static final String SUFFIX = "Bean";
 
 	@SuppressWarnings("unchecked")
+	public static <T> Class<? extends T> getImplementationClass(final Class<T> jdbcMapper) throws ClassNotFoundException {
+		return (Class<? extends T>) Class.forName(jdbcMapper.getName() + SUFFIX);
+	}
+
+	public static <T> Constructor<? extends T> getConnectionConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
+		return getImplementationClass(jdbcMapper).getConstructor(Connection.class);
+	}
+
+	public static <T> Constructor<? extends T> getDefaultConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
+		return getImplementationClass(jdbcMapper).getConstructor();
+	}
+
+	public static <T> Constructor<? extends T> getFactoryConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
+		return getImplementationClass(jdbcMapper).getConstructor(Factory.class);
+	}
+
 	public static <T> T create(final Class<T> jdbcMapper, final Connection connection) {
 		try {
-			return (T) Class.forName(jdbcMapper.getName() + SUFFIX).getConstructor(Connection.class).newInstance(connection);
+			return getConnectionConstructor(jdbcMapper).newInstance(connection);
 		} catch (Throwable e) {
 			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
 		}
 	}
 
 	public static <T> T create(final Class<T> jdbcMapper) {
-		return create(jdbcMapper, null);
+		try {
+			return getDefaultConstructor(jdbcMapper).newInstance();
+		} catch (Throwable e) {
+			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
+		}
+	}
+
+	private final Constructor<? extends T> constructor;
+	private final Object[] args;
+
+	public JdbcMapperFactory(final Class<T> jdbcMapper) {
+		try {
+			this.constructor = getDefaultConstructor(jdbcMapper);
+			this.args = null;
+		} catch (Throwable e) {
+			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
+		}
+	}
+
+	public JdbcMapperFactory(final Constructor<? extends T> constructor, final Object... args) {
+		if(constructor == null)
+			throw new NullPointerException("constructor must be non-null");
+		this.constructor = constructor;
+		this.args = args;
+	}
+
+	public JdbcMapperFactory(final Class<T> queryMapperClass, final Factory<Connection> connectionFactory) {
+		if(queryMapperClass == null)
+			throw new NullPointerException("queryMapperClass must be non-null");
+		if(connectionFactory == null)
+			throw new NullPointerException("connectionFactory must be non-null");
+		try {
+			this.constructor = queryMapperClass.getConstructor(Factory.class);
+		} catch (NoSuchMethodException e) {
+			throw new RuntimeException("queryMapperClass must have a constructor that takes Factory<Connection>", e);
+		}
+		this.args = new Object[]{connectionFactory};
+	}
+
+	public JdbcMapperFactory(final Class<T> queryMapperClass, final String jndiName) {
+		if(queryMapperClass == null)
+			throw new NullPointerException("queryMapperClass must be non-null");
+		if(jndiName == null)
+			throw new NullPointerException("jndiName must be non-null");
+		try {
+			this.constructor = queryMapperClass.getConstructor(String.class);
+		} catch (NoSuchMethodException e) {
+			throw new RuntimeException("queryMapperClass must have a constructor that takes String", e);
+		}
+		this.args = new Object[]{jndiName};
+	}
+
+	@Override
+	public T create() throws SQLException {
+		try {
+			return this.constructor.newInstance(args);
+		} catch (InstantiationException e) {
+			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
+		} catch (InvocationTargetException e) {
+			throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
+		}
 	}
 }

jdbcmapper/src/test/java/com/moparisthebest/jdbc/codegen/PersonDAO.java

@@ -22,7 +22,7 @@ import java.time.*;
  * Created by mopar on 5/24/17.
  */
 @JdbcMapper.Mapper(
-//		jndiName = "bob",
+		jndiName = "bob",
 //		databaseType = JdbcMapper.DatabaseType.ORACLE
 		cachePreparedStatements = JdbcMapper.OptionalBool.FALSE
 //		, sqlParser = SimpleSQLParser.class

querymapper/src/main/java/com/moparisthebest/jdbc/CachingQueryMapper.java

@@ -22,8 +22,8 @@ public class CachingQueryMapper extends QueryMapper {
 
 	protected final Map<String, PreparedStatement> cache;
 
-	protected CachingQueryMapper(Connection conn, String jndiName, ResultSetMapper cm, final int maxEntries) {
+	protected CachingQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, ResultSetMapper cm, final int maxEntries) {
-		super(conn, jndiName, cm);
+		super(conn, jndiName, factory, cm);
 		if (maxEntries > 0) { // we want a limited cache
 			final float loadFactor = 0.75f; // default for HashMaps
 			// if we set the initialCapacity this way, nothing should ever need re-sized
@@ -43,40 +43,56 @@ public class CachingQueryMapper extends QueryMapper {
 			cache = new HashMap<String, PreparedStatement>();
 	}
 
+	protected CachingQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, ResultSetMapper cm) {
+		this(conn, jndiName, factory, cm, 20); // default size of 20
+	}
+
 	public CachingQueryMapper(Connection conn, ResultSetMapper cm, final int maxEntries) {
-		this(conn, null, cm, maxEntries);
+		this(conn, null, null, cm, maxEntries);
 	}
 
 	public CachingQueryMapper(Connection conn, final int maxEntries) {
-		this(conn, null, null, maxEntries);
+		this(conn, null, null, null, maxEntries);
 	}
 
 	public CachingQueryMapper(String jndiName, ResultSetMapper cm, final int maxEntries) {
-		this(null, jndiName, cm, maxEntries);
+		this(null, jndiName, null, cm, maxEntries);
 	}
 
 	public CachingQueryMapper(String jndiName, final int maxEntries) {
-		this(null, jndiName, null, maxEntries);
+		this(null, jndiName, null, null, maxEntries);
 	}
 
-	protected CachingQueryMapper(Connection conn, String jndiName, ResultSetMapper cm) {
+	public CachingQueryMapper(Factory<Connection> factory, ResultSetMapper cm, final int maxEntries) {
-		this(conn, jndiName, cm, 20); // default size of 20
+		this(null, null, factory, cm, maxEntries);
+	}
+
+	public CachingQueryMapper(Factory<Connection> factory, final int maxEntries) {
+		this(null, null, factory, null, maxEntries);
 	}
 
 	public CachingQueryMapper(Connection conn, ResultSetMapper cm) {
-		this(conn, null, cm);
+		this(conn, null, null, cm);
 	}
 
 	public CachingQueryMapper(Connection conn) {
-		this(conn, null, null);
+		this(conn, null, null, null);
 	}
 
 	public CachingQueryMapper(String jndiName, ResultSetMapper cm) {
-		this(null, jndiName, cm);
+		this(null, jndiName, null, cm);
 	}
 
 	public CachingQueryMapper(String jndiName) {
-		this(null, jndiName, null);
+		this(null, jndiName, null, null);
+	}
+
+	public CachingQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
+		this(null, null, factory, cm);
+	}
+
+	public CachingQueryMapper(Factory<Connection> factory) {
+		this(null, null, factory, null);
 	}
 
 	protected PreparedStatement getPreparedStatement(String sql) throws SQLException {

querymapper/src/main/java/com/moparisthebest/jdbc/ListQueryMapper.java

@@ -34,26 +34,26 @@ public class ListQueryMapper extends QueryMapper {
 
 	public static final String inListReplace = "{inList}";
 
-	private ListQueryMapper(Connection conn, String jndiName, QueryMapper delegate, ResultSetMapper cm, InList inList) {
+	private ListQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, QueryMapper delegate, ResultSetMapper cm, InList inList) {
 		this.inList = inList;
-		this.delegate = delegate == null ? new QueryMapper(conn, jndiName, cm) :
+		this.delegate = delegate == null ? new QueryMapper(conn, jndiName, factory, cm) :
 				(delegate instanceof ListQueryMapper ? ((ListQueryMapper)delegate).delegate : delegate);
 	}
 
 	public ListQueryMapper(QueryMapper delegate, InList inList) {
-		this(null, null, delegate, null, inList);
+		this(null, null, null, delegate, null, inList);
 	}
 
 	public ListQueryMapper(QueryMapper delegate) {
-		this(null, null, delegate, null, defaultInList);
+		this(null, null, null, delegate, null, defaultInList);
 	}
 
 	public ListQueryMapper(Connection conn, InList inList) {
-		this(conn, null, null, null, inList);
+		this(conn, null, null, null, null, inList);
 	}
 
 	public ListQueryMapper(Connection conn, ResultSetMapper cm, InList inList) {
-		this(conn, null, null, cm, inList);
+		this(conn, null, null, null, cm, inList);
 	}
 
 	public ListQueryMapper(Connection conn) {
@@ -65,11 +65,11 @@ public class ListQueryMapper extends QueryMapper {
 	}
 
 	public ListQueryMapper(String jndiName, InList inList) {
-		this(null, jndiName, null, null, inList);
+		this(null, jndiName, null, null, null, inList);
 	}
 
 	public ListQueryMapper(String jndiName, ResultSetMapper cm, InList inList) {
-		this(null, jndiName, null, cm, inList);
+		this(null, jndiName, null, null, cm, inList);
 	}
 
 	public ListQueryMapper(String jndiName) {
@@ -80,6 +80,23 @@ public class ListQueryMapper extends QueryMapper {
 		this(jndiName, cm, defaultInList);
 	}
 
+	public ListQueryMapper(Factory<Connection> factory, InList inList) {
+		this(null, null, factory, null, null, inList);
+	}
+
+	public ListQueryMapper(Factory<Connection> factory, ResultSetMapper cm, InList inList) {
+		this(null, null, factory, null, cm, inList);
+	}
+
+	public ListQueryMapper(Factory<Connection> factory) {
+		this(factory, defaultInList);
+	}
+
+	public ListQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
+		this(factory, cm, defaultInList);
+	}
+
+	// todo: get rid of wrap, cause, how do you know to close it or not? :'(
 	public static ListQueryMapper wrap(final QueryMapper qm){
 		return qm instanceof ListQueryMapper ? (ListQueryMapper)qm : new ListQueryMapper(qm);
 	}

querymapper/src/main/java/com/moparisthebest/jdbc/NullQueryMapper.java

@@ -16,25 +16,25 @@ public class NullQueryMapper extends QueryMapper {
 	protected final boolean verbose;
 	protected final QueryMapper delegate;
 
-	private NullQueryMapper(Connection conn, String jndiName, QueryMapper delegate, ResultSetMapper cm, boolean verbose) {
+	private NullQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, QueryMapper delegate, ResultSetMapper cm, boolean verbose) {
 		this.verbose = verbose;
-		this.delegate = delegate == null ? new QueryMapper(conn, jndiName, cm) : delegate;
+		this.delegate = delegate == null ? new QueryMapper(conn, jndiName, factory, cm) : delegate;
 	}
 
 	public NullQueryMapper(QueryMapper delegate, boolean verbose) {
-		this(null, null, delegate, null, verbose);
+		this(null, null, null, delegate, null, verbose);
 	}
 
 	public NullQueryMapper(QueryMapper delegate) {
-		this(null, null, delegate, null, true);
+		this(null, null, null, delegate, null, true);
 	}
 
 	public NullQueryMapper(Connection conn, boolean verbose) {
-		this(conn, null, null, null, verbose);
+		this(conn, null, null, null, null, verbose);
 	}
 
 	public NullQueryMapper(Connection conn, ResultSetMapper cm, boolean verbose) {
-		this(conn, null, null, cm, verbose);
+		this(conn, null, null, null, cm, verbose);
 	}
 
 	public NullQueryMapper(Connection conn) {
@@ -46,11 +46,11 @@ public class NullQueryMapper extends QueryMapper {
 	}
 
 	public NullQueryMapper(String jndiName, boolean verbose) {
-		this(null, jndiName, null, null, verbose);
+		this(null, jndiName, null, null, null, verbose);
 	}
 
 	public NullQueryMapper(String jndiName, ResultSetMapper cm, boolean verbose) {
-		this(null, jndiName, null, cm, verbose);
+		this(null, jndiName, null, null, cm, verbose);
 	}
 
 	public NullQueryMapper(String jndiName) {
@@ -61,6 +61,23 @@ public class NullQueryMapper extends QueryMapper {
 		this(jndiName, cm, true);
 	}
 
+	public NullQueryMapper(Factory<Connection> factory, boolean verbose) {
+		this(null, null, factory, null, null, verbose);
+	}
+
+	public NullQueryMapper(Factory<Connection> factory, ResultSetMapper cm, boolean verbose) {
+		this(null, null, factory, null, cm, verbose);
+	}
+
+	public NullQueryMapper(Factory<Connection> factory) {
+		this(factory, true);
+	}
+
+	public NullQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
+		this(factory, cm, true);
+	}
+
+	// todo: remove this refer to ListQueryMapper for why
 	public static NullQueryMapper wrap(final QueryMapper qm){
 		return qm instanceof NullQueryMapper ? (NullQueryMapper)qm : new NullQueryMapper(qm);
 	}

querymapper/src/main/java/com/moparisthebest/jdbc/QueryMapper.java

@@ -36,29 +36,40 @@ public class QueryMapper implements JdbcMapper {
 	protected final ResultSetMapper cm;
 	protected final Connection conn;
 	protected final Context context;
+	protected final boolean closeConn;
 
-	protected QueryMapper(Connection conn, String jndiName, ResultSetMapper cm) {
+	protected QueryMapper(Connection conn, final String jndiName, final Factory<Connection> factory, final ResultSetMapper cm) {
 		this.cm = cm == null ? defaultRsm : cm;
+		boolean closeConn = false;
 		Context context = null;
-		if (conn == null && jndiName != null)
+		if(conn == null) {
+			if (factory != null) {
+				try {
+					conn = factory.create();
+					closeConn = true;
+				} catch (SQLException e) {
+					throw new RuntimeException("factory failed to create connection", e);
+				}
+			} else if (jndiName != null)
 				try {
 					context = new InitialContext();
 					DataSource ds = (DataSource) context.lookup(jndiName);
 					conn = ds.getConnection();
+					closeConn = true;
 				} catch (Throwable e) {
-				e.printStackTrace();
-				tryClose(conn);
-			} finally {
 					tryClose(context);
+					throw new RuntimeException("JNDI lookup failed to create connection", e);
 				}
+		}
+		if (conn == null)
+			throw new NullPointerException("Connection needs to be non-null for QueryMapper...");
 		this.conn = conn;
 		this.context = context;
-		if (this.conn == null)
+		this.closeConn = closeConn;
-			throw new NullPointerException("Connection needs to be non-null for QueryMapper...");
 	}
 
 	public QueryMapper(Connection conn, ResultSetMapper cm) {
-		this(conn, null, cm);
+		this(conn, null, null, cm);
 	}
 
 	public QueryMapper(Connection conn) {
@@ -66,13 +77,21 @@ public class QueryMapper implements JdbcMapper {
 	}
 
 	public QueryMapper(String jndiName, ResultSetMapper cm) {
-		this(null, jndiName, cm);
+		this(null, jndiName, null, cm);
 	}
 
 	public QueryMapper(String jndiName) {
 		this(jndiName, null);
 	}
 
+	public QueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
+		this(null, null, factory, cm);
+	}
+
+	public QueryMapper(Factory<Connection> factory) {
+		this(factory, null);
+	}
+
 	/**
 	 * Only meant to be called by implementing classes
 	 */
@@ -80,11 +99,12 @@ public class QueryMapper implements JdbcMapper {
 		this.cm = null;
 		this.conn = null;
 		this.context = null;
+		this.closeConn = false;
 	}
 
 	@Override
 	public void close() {
-		if (context != null) {
+		if (closeConn) {
 			tryClose(conn);
 			tryClose(context);
 		}

querymapper/src/test/java/com/moparisthebest/jdbc/QueryMapperTest.java

@@ -108,7 +108,7 @@ public class QueryMapperTest {
 		}
 	}
 
-	public static Connection getConnection() throws Throwable {
+	public static Connection getConnection() throws SQLException {
 		return DriverManager.getConnection("jdbc:derby:memory:derbyDB;create=true");
 	}
 

querymapper/src/test/java/com/moparisthebest/jdbc/QueryRunnerTest.java

@@ -0,0 +1,62 @@
+package com.moparisthebest.jdbc;
+
+import com.moparisthebest.jdbc.codegen.JdbcMapperFactory;
+import com.moparisthebest.jdbc.dto.Person;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+import static com.moparisthebest.jdbc.QueryMapperTest.*;
+
+/**
+ * Created by mopar on 7/1/17.
+ */
+public class QueryRunnerTest {
+	public static final QueryRunner<QueryMapper> qr = new QueryRunner<QueryMapper>(new JdbcMapperFactory<QueryMapper>(QueryMapper.class, new Factory<Connection>() {
+		@Override
+		public Connection create() throws SQLException {
+			return QueryMapperTest.getConnection();
+		}
+	}));
+
+	private void testPerson(final Person expected, final String query) throws Throwable {
+		final Person actual = qr.runInTransaction(new QueryRunner.Runner<QueryMapper, Person>() {
+			@Override
+			public Person run(final QueryMapper qm) throws SQLException {
+				return qm.toObject(query, expected.getClass(), expected.getPersonNo());
+			}
+		});
+		/*
+		System.out.println("expected: " + expected);
+		System.out.println("actual:   " + actual);
+		*/
+		Assert.assertEquals(expected, actual);
+	}
+
+	@Test
+	public void testFieldRegularPerson() throws Throwable {
+		testPerson(fieldPerson1, personRegular);
+	}
+
+	@Test
+	public void testFieldRegularAndUnderscore() throws Throwable {
+		testPerson(fieldBoss1, bossRegularAndUnderscore);
+	}
+
+	@Test
+	public void testFieldRegularAndUnderscoreReverse() throws Throwable {
+		testPerson(fieldBoss1, bossRegularAndUnderscoreReverse);
+	}
+
+	@Test
+	public void testFieldRegular() throws Throwable {
+		testPerson(fieldBoss2, bossRegular);
+	}
+
+	@Test
+	public void testFieldUnderscore() throws Throwable {
+		testPerson(fieldBoss3, bossUnderscore);
+	}
+}