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StatementWrapper.javaAPI DocGlassfish v2 API37598Fri May 04 22:36:04 BST 2007com.sun.gjc.spi.base

StatementWrapper

public abstract class StatementWrapper extends Object implements Statement
Abstract class for wrapping Statement

Fields Summary
protected Connection
connection
protected Statement
jdbcStatement
Constructors Summary
public StatementWrapper(Connection con, Statement statement)
Abstract class for wrapping Statement

param
con ConnectionWrapper
param
statement Statement that is to be wrapped


                           
         
        connection = con;
        jdbcStatement = statement;
    
Methods Summary
public voidaddBatch(java.lang.String sql)
Adds the given SQL command to the current list of commmands for this Statement object. The commands in this list can be executed as a batch by calling the method executeBatch.

NOTE: This method is optional.

param
sql typically this is a static SQL INSERT or UPDATE statement
throws
java.sql.SQLException if a database access error occurs, or the driver does not support batch updates
see
#executeBatch
since
1.2

        jdbcStatement.addBatch(sql);
    
public voidcancel()
Cancels this Statement object if both the DBMS and driver support aborting an SQL statement. This method can be used by one thread to cancel a statement that is being executed by another thread.

throws
java.sql.SQLException if a database access error occurs

        jdbcStatement.cancel();
    
public voidclearBatch()
Empties this Statement object's current list of SQL commands.

NOTE: This method is optional.

throws
java.sql.SQLException if a database access error occurs or the driver does not support batch updates
see
#addBatch
since
1.2

         jdbcStatement.clearBatch();
    
public voidclearWarnings()
Clears all the warnings reported on this Statement object. After a call to this method, the method getWarnings will return null until a new warning is reported for this Statement object.

throws
java.sql.SQLException if a database access error occurs

         jdbcStatement.clearWarnings();
    
public voidclose()
Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed. It is generally good practice to release resources as soon as you are finished with them to avoid tying up database resources.

Calling the method close on a Statement object that is already closed has no effect.

Note: A Statement object is automatically closed when it is garbage collected. When a Statement object is closed, its current ResultSet object, if one exists, is also closed.

throws
java.sql.SQLException if a database access error occurs

        jdbcStatement.close();
    
public booleanexecute(java.lang.String sql)
Executes the given SQL statement, which may return multiple results. In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

param
sql any SQL statement
return
true if the first result is a ResultSet object; false if it is an update count or there are no results
throws
java.sql.SQLException if a database access error occurs
see
#getResultSet
see
#getUpdateCount
see
#getMoreResults

        return jdbcStatement.execute(sql);
    
public booleanexecute(java.lang.String sql, int autoGeneratedKeys)
Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL statement is not an INSERT statement.

In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

param
sql any SQL statement
param
autoGeneratedKeys a constant indicating whether auto-generated keys should be made available for retrieval using the method getGeneratedKeys; one of the following constants: Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS
return
true if the first result is a ResultSet object; false if it is an update count or there are no results
throws
java.sql.SQLException if a database access error occurs or the second parameter supplied to this method is not Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS.
see
#getResultSet
see
#getUpdateCount
see
#getMoreResults
see
#getGeneratedKeys
since
1.4

        return jdbcStatement.execute(sql, autoGeneratedKeys);
    
public booleanexecute(java.lang.String sql, int[] columnIndexes)
Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

Under some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

param
sql any SQL statement
param
columnIndexes an array of the indexes of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
return
true if the first result is a ResultSet object; false if it is an update count or there are no results
throws
java.sql.SQLException if a database access error occurs or the elements in the int array passed to this method are not valid column indexes
see
#getResultSet
see
#getUpdateCount
see
#getMoreResults
since
1.4

        return jdbcStatement.execute(sql, columnIndexes);
    
public booleanexecute(java.lang.String sql, java.lang.String[] columnNames)
Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

param
sql any SQL statement
param
columnNames an array of the names of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
return
true if the next result is a ResultSet object; false if it is an update count or there are no more results
throws
java.sql.SQLException if a database access error occurs or the elements of the String array passed to this method are not valid column names
see
#getResultSet
see
#getUpdateCount
see
#getMoreResults
see
#getGeneratedKeys
since
1.4

        return jdbcStatement.execute(sql, columnNames);
    
public int[]executeBatch()
Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. The int elements of the array that is returned are ordered to correspond to the commands in the batch, which are ordered according to the order in which they were added to the batch. The elements in the array returned by the method executeBatch may be one of the following:
  1. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution
  2. A value of SUCCESS_NO_INFO -- indicates that the command was processed successfully but that the number of rows affected is unknown

    If one of the commands in a batch update fails to execute properly, this method throws a BatchUpdateException, and a JDBC driver may or may not continue to process the remaining commands in the batch. However, the driver's behavior must be consistent with a particular DBMS, either always continuing to process commands or never continuing to process commands. If the driver continues processing after a failure, the array returned by the method BatchUpdateException.getUpdateCounts will contain as many elements as there are commands in the batch, and at least one of the elements will be the following:

  3. A value of EXECUTE_FAILED -- indicates that the command failed to execute successfully and occurs only if a driver continues to process commands after a command fails

A driver is not required to implement this method. The possible implementations and return values have been modified in the Java 2 SDK, Standard Edition, version 1.3 to accommodate the option of continuing to proccess commands in a batch update after a BatchUpdateException obejct has been thrown.

return
an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
throws
java.sql.SQLException if a database access error occurs or the driver does not support batch statements. Throws {@link java.sql.BatchUpdateException} (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
since
1.3

        return jdbcStatement.executeBatch();
    
public intexecuteUpdate(java.lang.String sql)
Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement.

param
sql an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
return
either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing
throws
java.sql.SQLException if a database access error occurs or the given SQL statement produces a ResultSet object

        return jdbcStatement.executeUpdate(sql);
    
public intexecuteUpdate(java.lang.String sql, int autoGeneratedKeys)
Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval.

param
sql must be an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
param
autoGeneratedKeys a flag indicating whether auto-generated keys should be made available for retrieval; one of the following constants: Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS
return
either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing
throws
java.sql.SQLException if a database access error occurs, the given SQL statement returns a ResultSet object, or the given constant is not one of those allowed
since
1.4

        return jdbcStatement.executeUpdate(sql, autoGeneratedKeys);
    
public intexecuteUpdate(java.lang.String sql, int[] columnIndexes)
Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

param
sql an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement
param
columnIndexes an array of column indexes indicating the columns that should be returned from the inserted row
return
either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
throws
java.sql.SQLException if a database access error occurs, the SQL statement returns a ResultSet object, or the second argument supplied to this method is not an int array whose elements are valid column indexes
since
1.4

        return jdbcStatement.executeUpdate(sql, columnIndexes);
    
public intexecuteUpdate(java.lang.String sql, java.lang.String[] columnNames)
Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

param
sql an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
param
columnNames an array of the names of the columns that should be returned from the inserted row
return
either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
throws
java.sql.SQLException if a database access error occurs, the SQL statement returns a ResultSet object, or the second argument supplied to this method is not a String array whose elements are valid column names
since
1.4

        return jdbcStatement.executeUpdate(sql, columnNames);
    
public java.sql.ConnectiongetActualConnection()
Returns the underlying physical connection.

return
the actual connection that produced this statement
throws
SQLException

        return jdbcStatement.getConnection();
    
public java.sql.ConnectiongetConnection()
Retrieves the Connection object that produced this Statement object.

return
the connection that produced this statement
throws
java.sql.SQLException if a database access error occurs
since
1.2

        return connection;
    
public intgetFetchDirection()
Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object. If this Statement object has not set a fetch direction by calling the method setFetchDirection, the return value is implementation-specific.

return
the default fetch direction for result sets generated from this Statement object
throws
java.sql.SQLException if a database access error occurs
see
#setFetchDirection
since
1.2

        return jdbcStatement.getFetchDirection();
    
public intgetFetchSize()
Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this Statement object. If this Statement object has not set a fetch size by calling the method setFetchSize, the return value is implementation-specific.

return
the default fetch size for result sets generated from this Statement object
throws
java.sql.SQLException if a database access error occurs
see
#setFetchSize
since
1.2

        return jdbcStatement.getFetchSize();
    
public intgetMaxFieldSize()
Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR columns. If the limit is exceeded, the excess data is silently discarded.

return
the current column size limit for columns storing character and binary values; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs
see
#setMaxFieldSize

        return jdbcStatement.getMaxFieldSize();
    
public intgetMaxRows()
Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain. If this limit is exceeded, the excess rows are silently dropped.

return
the current maximum number of rows for a ResultSet object produced by this Statement object; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs
see
#setMaxRows

        return jdbcStatement.getMaxRows();
    
public booleangetMoreResults()
Moves to this Statement object's next result, returns true if it is a ResultSet object, and implicitly closes any current ResultSet object(s) obtained with the method getResultSet.

There are no more results when the following is true:

// stmt is a Statement object
((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))

return
true if the next result is a ResultSet object; false if it is an update count or there are no more results
throws
java.sql.SQLException if a database access error occurs
see
#execute

        return jdbcStatement.getMoreResults();
    
public booleangetMoreResults(int current)
Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.

There are no more results when the following is true:

// stmt is a Statement object
((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))

param
current one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSet: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT, or Statement.CLOSE_ALL_RESULTS
return
true if the next result is a ResultSet object; false if it is an update count or there are no more results
throws
java.sql.SQLException if a database access error occurs or the argument supplied is not one of the following: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT, or Statement.CLOSE_ALL_RESULTS
see
#execute
since
1.4

        return jdbcStatement.getMoreResults(current);
    
public intgetQueryTimeout()
Retrieves the number of seconds the driver will wait for a Statement object to execute. If the limit is exceeded, a SQLException is thrown.

return
the current query timeout limit in seconds; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs
see
#setQueryTimeout

        return jdbcStatement.getQueryTimeout();
    
public intgetResultSetConcurrency()
Retrieves the result set concurrency for ResultSet objects generated by this Statement object.

return
either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
throws
java.sql.SQLException if a database access error occurs
since
1.2

        return jdbcStatement.getResultSetConcurrency();
    
public intgetResultSetHoldability()
Retrieves the result set holdability for ResultSet objects generated by this Statement object.

return
either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
throws
java.sql.SQLException if a database access error occurs
since
1.4

        return jdbcStatement.getResultSetHoldability();
    
public intgetResultSetType()
Retrieves the result set type for ResultSet objects generated by this Statement object.

return
one of ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
throws
java.sql.SQLException if a database access error occurs
since
1.2

        return jdbcStatement.getResultSetType();
    
public intgetUpdateCount()
Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned. This method should be called only once per result.

return
the current result as an update count; -1 if the current result is a ResultSet object or there are no more results
throws
java.sql.SQLException if a database access error occurs
see
#execute

        return jdbcStatement.getUpdateCount();
    
public java.sql.SQLWarninggetWarnings()
Retrieves the first warning reported by calls on this Statement object. Subsequent Statement object warnings will be chained to this SQLWarning object.

The warning chain is automatically cleared each time a statement is (re)executed. This method may not be called on a closed Statement object; doing so will cause an SQLException to be thrown.

Note: If you are processing a ResultSet object, any warnings associated with reads on that ResultSet object will be chained on it rather than on the Statement object that produced it.

return
the first SQLWarning object or null if there are no warnings
throws
java.sql.SQLException if a database access error occurs or this method is called on a closed statement

        return jdbcStatement.getWarnings();
    
public voidsetCursorName(java.lang.String name)
Sets the SQL cursor name to the given String, which will be used by subsequent Statement object execute methods. This name can then be used in SQL positioned update or delete statements to identify the current row in the ResultSet object generated by this statement. If the database does not support positioned update/delete, this method is a noop. To insure that a cursor has the proper isolation level to support updates, the cursor's SELECT statement should have the form SELECT FOR UPDATE. If FOR UPDATE is not present, positioned updates may fail.

Note: By definition, the execution of positioned updates and deletes must be done by a different Statement object than the one that generated the ResultSet object being used for positioning. Also, cursor names must be unique within a connection.

param
name the new cursor name, which must be unique within a connection
throws
java.sql.SQLException if a database access error occurs

         jdbcStatement.setCursorName(name);
    
public voidsetEscapeProcessing(boolean enable)
Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL statement to the database.

Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for PreparedStatements objects will have no effect.

param
enable true to enable escape processing; false to disable it
throws
java.sql.SQLException if a database access error occurs

        jdbcStatement.setEscapeProcessing(enable);
    
public voidsetFetchDirection(int direction)
Gives the driver a hint as to the direction in which rows will be processed in ResultSet objects created using this Statement object. The default value is ResultSet.FETCH_FORWARD.

Note that this method sets the default fetch direction for result sets generated by this Statement object. Each result set has its own methods for getting and setting its own fetch direction.

param
direction the initial direction for processing rows
throws
java.sql.SQLException if a database access error occurs or the given direction is not one of ResultSet.FETCH_FORWARD, ResultSet.FETCH_REVERSE, or ResultSet.FETCH_UNKNOWN
see
#getFetchDirection
since
1.2

        jdbcStatement.setFetchDirection(direction);
    
public voidsetFetchSize(int rows)
Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. The number of rows specified affects only result sets created using this statement. If the value specified is zero, then the hint is ignored. The default value is zero.

param
rows the number of rows to fetch
throws
java.sql.SQLException if a database access error occurs, or the condition 0 <= rows <= this.getMaxRows() is not satisfied.
see
#getFetchSize
since
1.2

         jdbcStatement.setFetchDirection(rows);
    
public voidsetMaxFieldSize(int max)
Sets the limit for the maximum number of bytes in a ResultSet column storing character or binary values to the given number of bytes. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.

param
max the new column size limit in bytes; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs or the condition max >= 0 is not satisfied
see
#getMaxFieldSize

        jdbcStatement.setMaxFieldSize(max);
    
public voidsetMaxRows(int max)
Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.

param
max the new max rows limit; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs or the condition max >= 0 is not satisfied
see
#getMaxRows

        jdbcStatement.setMaxFieldSize(max);
    
public voidsetQueryTimeout(int seconds)
Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds. If the limit is exceeded, an SQLException is thrown.

param
seconds the new query timeout limit in seconds; zero means there is no limit
throws
java.sql.SQLException if a database access error occurs or the condition seconds >= 0 is not satisfied
see
#getQueryTimeout

         jdbcStatement.setQueryTimeout(seconds);