simple fix of oracle stream API for RAW column

Backported from #1498

Signed-off-by: turakamou <[email protected]>

Author: turakamou

vertx-oracle-client/src/main/java/io/vertx/oracleclient/impl/RowReader.java

@@ -16,7 +16,6 @@
 import io.vertx.core.impl.logging.Logger;
 import io.vertx.core.impl.logging.LoggerFactory;
 import io.vertx.oracleclient.OracleException;
-import io.vertx.oracleclient.impl.commands.OraclePreparedQueryCommand;
 import io.vertx.oracleclient.impl.commands.OracleResponse;
 import io.vertx.sqlclient.Row;
 import io.vertx.sqlclient.impl.RowDesc;
@@ -40,7 +39,7 @@ public class RowReader<C, R> implements Flow.Subscriber<Row>, Function<oracle.jd
   private static final Logger LOG = LoggerFactory.getLogger(RowReader.class);
 
   private final ContextInternal context;
-  private final List<String> types;
+  private final List<Class<?>> classes;
   private final RowDesc description;
   private final Statement resultSetStatement;
 
@@ -63,9 +62,9 @@ public RowReader(ContextInternal context, Collector<Row, C, R> collector, Oracle
     resultSetStatement = ors.getStatement();
     ResultSetMetaData metaData = ors.getMetaData();
     int cols = metaData.getColumnCount();
-    types = new ArrayList<>(cols);
+    classes = new ArrayList<>(cols);
     for (int i = 1; i <= cols; i++) {
-      types.add(metaData.getColumnClassName(i));
+      classes.add(getType(metaData.getColumnClassName(i)));
     }
     Flow.Publisher<Row> publisher = ors.publisherOracle(this);
     description = OracleRowDesc.create(metaData);
@@ -170,24 +169,24 @@ private OracleResponse<R> createResponse() {
   @Override
   public Row apply(oracle.jdbc.OracleRow oracleRow) {
     try {
-      return transform(types, description, oracleRow);
+      return transform(classes, description, oracleRow);
     } catch (SQLException e) {
       throw new OracleException(e);
     }
   }
 
-  private static Row transform(List<String> ors, RowDesc desc, oracle.jdbc.OracleRow or) throws SQLException {
+  private static Row transform(List<Class<?>> classes, RowDesc desc, oracle.jdbc.OracleRow or) throws SQLException {
     Row row = new OracleRow(desc);
     for (int i = 1; i <= desc.columnNames().size(); i++) {
-      Object res = convertSqlValue(or.getObject(i, getType(ors.get(i - 1))));
+      Object res = convertSqlValue(or.getObject(i, classes.get(i - 1)));
       row.addValue(res);
     }
     return row;
   }
 
   private static Class<?> getType(String cn) {
     try {
-      return OraclePreparedQueryCommand.class.getClassLoader().loadClass(cn);
+      return Class.forName(cn, true, RowReader.class.getClassLoader());
     } catch (ClassNotFoundException e) {
       return null;
     }

vertx-oracle-client/src/test/java/io/vertx/oracleclient/test/OracleBinaryDataTypesTest.java

@@ -98,6 +98,28 @@ private <T> void testDecode(TestContext ctx, String columnName, JDBCType jdbcTyp
       }));
   }
 
+  private void testDecodeUsingStream(TestContext ctx, String columnName, JDBCType jdbcType, Buffer expected) {
+    pool.getConnection().onComplete(ctx.asyncAssertSuccess(conn -> {
+      conn.prepare("SELECT " + columnName + " FROM binary_data_types WHERE id = 1")
+        .onComplete(ctx.asyncAssertSuccess(preparedStatement -> {
+          preparedStatement.cursor().read(10).onComplete(ctx.asyncAssertSuccess(result -> {
+            ctx.assertEquals(1, result.size());
+            Row row = result.iterator().next();
+            ctx.assertEquals(expected, row.get(Buffer.class, 0));
+            ctx.assertEquals(expected, row.get(Buffer.class, columnName));
+            ColumnDescriptor columnDescriptor = result.columnDescriptors().get(0);
+            ctx.assertEquals(jdbcType, columnDescriptor.jdbcType());
+            ctx.assertNotNull(columnDescriptor);
+          }));
+        }));
+    }));
+  }
+
+  @Test
+  public void testDecodeRawUsingStream(TestContext ctx) {
+    testDecodeUsingStream(ctx, "test_raw", JDBCType.VARBINARY, Buffer.buffer("See you space cowboy..."));
+  }
+
   @Test
   public void testEncodeNull(TestContext ctx) {
     pool