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Consistent Object result declarations for ResultQuerySpec

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Closes gh-31403
This commit is contained in:
Juergen Hoeller
2023-10-10 22:58:13 +02:00
parent de6692e7d8
commit c0d98fcc7a
4 changed files with 181 additions and 170 deletions
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10
spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/DefaultJdbcClient.java
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@@ -285,10 +285,9 @@ final class DefaultJdbcClient implements JdbcClient {
return classicOps.queryForMap(sql, indexedParams.toArray());
}
@SuppressWarnings("unchecked")
@Override
public <T> List<T> singleColumn() {
return (List<T>) classicOps.queryForList(sql, Object.class, indexedParams.toArray());
public List<Object> singleColumn() {
return classicOps.queryForList(sql, Object.class, indexedParams.toArray());
}
}
@@ -310,10 +309,9 @@ final class DefaultJdbcClient implements JdbcClient {
return namedParamOps.queryForMap(sql, namedParamSource);
}
@SuppressWarnings("unchecked")
@Override
public <T> List<T> singleColumn() {
return (List<T>) namedParamOps.queryForList(sql, namedParamSource, Object.class);
public List<Object> singleColumn() {
return namedParamOps.queryForList(sql, namedParamSource, Object.class);
}
}

9
spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/JdbcClient.java
View File

@@ -323,17 +323,16 @@ public interface JdbcClient {
* Retrieve a single column result,
* retaining the order from the original database result.
* @return a (potentially empty) list of rows, with each
* row represented as a column value of the given type
* row represented as its single column value
*/
<T> List<T> singleColumn();
List<Object> singleColumn();
/**
* Retrieve a single value result.
* @return the single row represented as its single
* column value of the given type
* @return the single row represented as its single column value
* @see DataAccessUtils#requiredSingleResult(Collection)
*/
default <T> T singleValue() {
default Object singleValue() {
return DataAccessUtils.requiredSingleResult(singleColumn());
}
}