DATAJDBC-131 - Polishing after review.

Put generics back in and added @SupressWarnings where this caused warnings.
Extracted the test “isMap” into a “isQualified” method on the property.

src/main/java/org/springframework/data/jdbc/core/DefaultDataAccessStrategy.java

@@ -149,7 +149,7 @@ public class DefaultDataAccessStrategy implements DataAccessStrategy {
 	}
 
 	@Override
-	public void deleteAll(PropertyPath propertyPath) {
+	public <T> void deleteAll(PropertyPath propertyPath) {
 		operations.getJdbcOperations().update(sql(propertyPath.getOwningType().getType()).createDeleteAllSql(propertyPath));
 	}
 
@@ -192,17 +192,17 @@ public class DefaultDataAccessStrategy implements DataAccessStrategy {
 		return operations.query(findAllInListSql, parameter, getEntityRowMapper(domainType));
 	}
 
+	@SuppressWarnings("unchecked")
 	@Override
-	public Iterable findAllByProperty(Object rootId, JdbcPersistentProperty property) {
+	public <T> Iterable<T> findAllByProperty(Object rootId, JdbcPersistentProperty property) {
 
 		Class<?> actualType = property.getActualType();
-		boolean isMap = property.getTypeInformation().isMap();
 		String findAllByProperty = sql(actualType).getFindAllByProperty(property.getReverseColumnName(),
 				property.getKeyColumn());
 
 		MapSqlParameterSource parameter = new MapSqlParameterSource(property.getReverseColumnName(), rootId);
 
-		return operations.query(findAllByProperty, parameter, isMap //
+		return (Iterable<T>)operations.query(findAllByProperty, parameter, property.isQualified() //
 				? getMapEntityRowMapper(property) //
 				: getEntityRowMapper(actualType));
 	}

src/main/java/org/springframework/data/jdbc/core/conversion/JdbcEntityWriter.java

@@ -110,7 +110,7 @@ public class JdbcEntityWriter extends JdbcEntityWriterSupport {
 	private void insertReferencedEntities(PropertyAndValue propertyAndValue, AggregateChange aggregateChange, DbAction dependingOn) {
 
 		Insert<Object> insert;
-		if (propertyAndValue.property.isMap()) {
+		if (propertyAndValue.property.isQualified()) {
 
 			Entry<Object, Object> valueAsEntry = (Entry<Object, Object>) propertyAndValue.value;
 		insert = DbAction.insert(valueAsEntry.getValue(), dependingOn);

src/main/java/org/springframework/data/jdbc/mapping/model/BasicJdbcPersistentProperty.java

@@ -109,7 +109,12 @@ public class BasicJdbcPersistentProperty extends AnnotationBasedPersistentProper
 
 	@Override
 	public String getKeyColumn() {
-		return isMap() ? context.getNamingStrategy().getKeyColumn(this) : null;
+		return isQualified() ? context.getNamingStrategy().getKeyColumn(this) : null;
+	}
+
+	@Override
+	public boolean isQualified() {
+		return isMap();
 	}
 
 	private Class columnTypeIfEntity(Class type) {

src/main/java/org/springframework/data/jdbc/mapping/model/JdbcPersistentProperty.java

@@ -46,4 +46,9 @@ public interface JdbcPersistentProperty extends PersistentProperty<JdbcPersisten
 	String getReverseColumnName();
 
 	String getKeyColumn();
+
+	/**
+	 * Returns if this property is a qualified property, i.e. a property referencing multiple elements that can get picked by a key or an index.
+	 */
+	boolean isQualified();
 }