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Revised example code (including correct visibility for execute method)

This commit is contained in:
Juergen Hoeller 2018-05-30 11:10:29 +02:00
parent f3e860e8f1
commit 0c52699102
1 changed files with 13 additions and 10 deletions
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23
src/docs/asciidoc/data-access.adoc
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@ -2214,7 +2214,7 @@ configure the application context to take advantage of these annotations.
[[jdbc-introduction]] [[jdbc-introduction]]
=== Introduction to Spring Framework JDBC === Introduction to Spring Framework's JDBC support
The value-add provided by the Spring Framework JDBC abstraction is perhaps best shown by The value-add provided by the Spring Framework JDBC abstraction is perhaps best shown by
the sequence of actions outlined in the table below. The table shows what actions Spring the sequence of actions outlined in the table below. The table shows what actions Spring
@ -4295,8 +4295,7 @@ the supplied `ResultSet`.
To pass parameters to a stored procedure that has one or more input parameters in its To pass parameters to a stored procedure that has one or more input parameters in its
definition in the RDBMS, you can code a strongly typed `execute(..)` method that would definition in the RDBMS, you can code a strongly typed `execute(..)` method that would
delegate to the superclass' untyped `execute(Map parameters)` method (which has delegate to the untyped `execute(Map)` method in the superclass; for example:
`protected` access); for example:
[source,java,indent=0] [source,java,indent=0]
[subs="verbatim,quotes"] [subs="verbatim,quotes"]
@ -4337,7 +4336,7 @@ delegate to the superclass' untyped `execute(Map parameters)` method (which has
=== Common problems with parameter and data value handling === Common problems with parameter and data value handling
Common problems with parameters and data values exist in the different approaches Common problems with parameters and data values exist in the different approaches
provided by the Spring Framework JDBC. provided by Spring Framework's JDBC support.
[[jdbc-type-information]] [[jdbc-type-information]]
@ -4407,11 +4406,11 @@ dependency injection.
jdbcTemplate.execute( jdbcTemplate.execute(
"INSERT INTO lob_table (id, a_clob, a_blob) VALUES (?, ?, ?)", "INSERT INTO lob_table (id, a_clob, a_blob) VALUES (?, ?, ?)",
new AbstractLobCreatingPreparedStatementCallback(lobHandler) { # <1> new AbstractLobCreatingPreparedStatementCallback(lobHandler) { # <1>
protected void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException { protected void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException {
ps.setLong(1, 1L); ps.setLong(1, 1L);
lobCreator.setClobAsCharacterStream(ps, 2, clobReader, (int)clobIn.length()); # <2> lobCreator.setClobAsCharacterStream(ps, 2, clobReader, (int)clobIn.length()); # <2>
lobCreator.setBlobAsBinaryStream(ps, 3, blobIs, (int)blobIn.length()); # <3> lobCreator.setBlobAsBinaryStream(ps, 3, blobIs, (int)blobIn.length()); # <3>
} }
} }
); );
@ -4449,9 +4448,13 @@ with the same instance variable `lobHandler` and a reference to a `DefaultLobHan
new RowMapper<Map<String, Object>>() { new RowMapper<Map<String, Object>>() {
public Map<String, Object> mapRow(ResultSet rs, int i) throws SQLException { public Map<String, Object> mapRow(ResultSet rs, int i) throws SQLException {
Map<String, Object> results = new HashMap<String, Object>(); Map<String, Object> results = new HashMap<String, Object>();
String clobText = lobHandler.getClobAsString(rs, "a_clob"); # <1> String clobText = lobHandler.getClobAsString(rs, "a_clob"); # <1>
results.put("CLOB", clobText); byte[] blobBytes = lobHandler.getBlobAsBytes(rs, "a_blob"); # <2> results.put("CLOB", clobText);
results.put("BLOB", blobBytes); return results; } }); byte[] blobBytes = lobHandler.getBlobAsBytes(rs, "a_blob"); # <2>
results.put("BLOB", blobBytes);
return results;
}
});
---- ----
<1> Using the method `getClobAsString`, retrieve the contents of the CLOB. <1> Using the method `getClobAsString`, retrieve the contents of the CLOB.