Polishing.

Added Javadoc, removed superfluous code.

Original pull request #980

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/query/AbstractJdbcQuery.java

@@ -125,8 +125,8 @@ <T> JdbcQueryExecution<List<T>> collectionQuery(RowMapper<T> rowMapper) {
 	/**
 	 * Obtain the result type to read from {@link ResultProcessor}.
 	 *
-	 * @param resultProcessor
-	 * @return
+	 * @param resultProcessor  the {@link ResultProcessor} used to determine the result type. Must not be {@literal null}.
+	 * @return the type that should get loaded from the database before it gets converted into the actual return type of a method. Guaranteed to be not {@literal null}.
 	 */
 	protected Class<?> resolveTypeToRead(ResultProcessor resultProcessor) {
 

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/query/JdbcQueryCreator.java

@@ -74,14 +74,14 @@ class JdbcQueryCreator extends RelationalQueryCreator<ParametrizedQuery> {
 	 * Creates new instance of this class with the given {@link PartTree}, {@link JdbcConverter}, {@link Dialect},
 	 * {@link RelationalEntityMetadata} and {@link RelationalParameterAccessor}.
 	 *
-	 * @param context
+	 * @param context the mapping context. Must not be {@literal null}.
 	 * @param tree part tree, must not be {@literal null}.
 	 * @param converter must not be {@literal null}.
 	 * @param dialect must not be {@literal null}.
 	 * @param entityMetadata relational entity metadata, must not be {@literal null}.
 	 * @param accessor parameter metadata provider, must not be {@literal null}.
-	 * @param isSliceQuery
-	 * @param returnedType
+	 * @param isSliceQuery flag denoting if the query returns a {@link org.springframework.data.domain.Slice}.
+	 * @param returnedType the {@link ReturnedType} to be returned by the query. Must not be {@literal null}.
 	 */
 	JdbcQueryCreator(RelationalMappingContext context, PartTree tree, JdbcConverter converter, Dialect dialect,
 			RelationalEntityMetadata<?> entityMetadata, RelationalParameterAccessor accessor, boolean isSliceQuery,
@@ -108,8 +108,8 @@ class JdbcQueryCreator extends RelationalQueryCreator<ParametrizedQuery> {
 	 * Validate parameters for the derived query. Specifically checking that the query method defines scalar parameters
 	 * and collection parameters where required and that invalid parameter declarations are rejected.
 	 *
-	 * @param tree
-	 * @param parameters
+	 * @param tree the tree structure defining the predicate of the query.
+	 * @param parameters parameters for the predicate.
 	 */
 	static void validate(PartTree tree, Parameters<?, ?> parameters,
 			MappingContext<? extends RelationalPersistentEntity<?>, ? extends RelationalPersistentProperty> context) {
@@ -345,18 +345,6 @@ static private final class Join {
 			this.parentId = parentId;
 		}
 
-		Table getJoinTable() {
-			return this.joinTable;
-		}
-
-		Column getJoinColumn() {
-			return this.joinColumn;
-		}
-
-		Column getParentId() {
-			return this.parentId;
-		}
-
 		@Override
 		public boolean equals(Object o) {