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+/* Statement.java -- Interface for executing SQL statements.
+   Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.sql;
+
+/**
+ * This interface provides a mechanism for executing SQL statements.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ */
+public interface Statement 
+{
+  int CLOSE_CURRENT_RESULT = 1;
+  int KEEP_CURRENT_RESULT = 2;
+  int CLOSE_ALL_RESULTS = 3;
+  int SUCCESS_NO_INFO = -2;
+  int EXECUTE_FAILED = -3;
+  int RETURN_GENERATED_KEYS = 1;
+  int NO_GENERATED_KEYS = 2;
+
+  /**
+   * This method executes the specified SQL SELECT statement and returns a
+   * (possibly empty) <code>ResultSet</code> with the results of the query.
+   *
+   * @param sql The SQL statement to execute.
+   * @return The result set of the SQL statement.
+   * @exception SQLException If an error occurs.
+   */
+  ResultSet executeQuery(String sql) throws SQLException;
+
+  /**
+   * This method executes the specified SQL INSERT, UPDATE, or DELETE statement
+   * and returns the number of rows affected, which may be 0.
+   * 
+   * @param sql The SQL statement to execute.
+   * @return The number of rows affected by the SQL statement.
+   * @exception SQLException If an error occurs.
+   */
+  int executeUpdate(String sql) throws SQLException;
+
+  /**
+   * This method closes the statement and frees any associated resources.
+   *
+   * @exception SQLException If an error occurs.
+   */
+  void close() throws SQLException;
+
+  /**
+   * This method returns the maximum length of any column value in bytes.
+   *
+   * @return The maximum length of any column value in bytes.
+   * @exception SQLException If an error occurs.
+   */
+  int getMaxFieldSize() throws SQLException;
+
+  /**
+   * This method sets the limit for the maximum length of any column in bytes.
+   *
+   * @param maxsize The new maximum length of any column in bytes.
+   * @exception SQLException If an error occurs.
+   */
+  void setMaxFieldSize(int max) throws SQLException;
+
+  /**
+   * This method returns the maximum possible number of rows in a result set.
+   *
+   * @return The maximum possible number of rows in a result set.
+   * @exception SQLException If an error occurs.
+   */
+  int getMaxRows() throws SQLException;
+
+  /**
+   * This method sets the maximum number of rows that can be present in a
+   * result set.
+   *
+   * @param maxrows The maximum possible number of rows in a result set.
+   * @exception SQLException If an error occurs.
+   */
+  void setMaxRows(int max) throws SQLException;
+
+  /**
+   * This method sets the local escape processing mode on or off.  The
+   * default value is on.
+   *
+   * @param escape <code>true</code> to enable local escape processing, 
+   *        <code>false</code> to disable it.
+   * @exception SQLException If an error occurs.
+   */
+  void setEscapeProcessing(boolean enable) throws SQLException;
+
+  /**
+   * The method returns the number of seconds a statement may be in process
+   * before timing out.  A value of 0 means there is no timeout.
+   *
+   * @return The SQL statement timeout in seconds.
+   * @exception SQLException If an error occurs.
+   */
+  int getQueryTimeout() throws SQLException;
+
+  /**
+   * This method sets the number of seconds a statement may be in process
+   * before timing out.  A value of 0 means there is no timeout.
+   *
+   * @param timeout The new SQL statement timeout value.
+   * @exception SQLException If an error occurs.
+   */
+  void setQueryTimeout(int seconds) throws SQLException;
+
+  /**
+   * This method cancels an outstanding statement, if the database supports
+   * that operation.
+   *
+   * @exception SQLException If an error occurs.
+   */
+  void cancel() throws SQLException;
+
+  /**
+   * This method returns the first SQL warning attached to this statement.
+   * Subsequent warnings will be chained to this one.
+   *
+   * @return The first SQL warning for this statement.
+   * @exception SQLException If an error occurs.
+   */
+  SQLWarning getWarnings() throws SQLException;
+
+  /**
+   * This method clears any SQL warnings that have been attached to this
+   * statement.
+   *
+   * @exception SQLException If an error occurs.
+   */
+  void clearWarnings() throws SQLException;
+
+  /**
+   * This method sets the cursor name that will be used by the result set.
+   *
+   * @param name The cursor name to use for this statement.
+   * @exception SQLException If an error occurs.
+   */
+  void setCursorName(String name) throws SQLException;
+
+  /**
+   * This method executes an arbitrary SQL statement of any time.  The
+   * methods <code>getResultSet</code>, <code>getMoreResults</code> and
+   * <code>getUpdateCount</code> retrieve the results.
+   *
+   * @return <code>true</code> if a result set was returned, <code>false</code>
+   *         if an update count was returned.
+   * @exception SQLException If an error occurs.
+   */
+  boolean execute(String sql) throws SQLException;
+
+  /**
+   * This method returns the result set of the SQL statement that was
+   * executed.  This should be called only once per result set returned.
+   *
+   * @return The result set of the query, or <code>null</code> if there was
+   *         no result set (for example, if the statement was an UPDATE).
+   * @exception SQLException If an error occurs.
+   * @see execute
+   */
+  ResultSet getResultSet() throws SQLException;
+
+  /**
+   * This method returns the update count of the SQL statement that was
+   * executed.  This should be called only once per executed SQL statement.
+   *
+   * @return The update count of the query, or -1 if there was no update
+   *         count (for example, if the statement was a SELECT).
+   * @exception SQLException If an error occurs.
+   * @see execute
+   */
+  int getUpdateCount() throws SQLException;
+
+  /**
+   * This method advances the result set pointer to the next result set, 
+   * which can then be retrieved using <code>getResultSet</code>
+   *
+   * @return <code>true</code> if there is another result set, 
+   *         <code>false</code> otherwise (for example, the next result is an
+   *         update count).
+   * @exception SQLException If an error occurs.
+   * @see execute
+   */
+  boolean getMoreResults() throws SQLException;
+
+  /**
+   * This method informs the driver which direction the result set will
+   * be accessed in.
+   *
+   * @param direction The direction the result set will be accessed in (?????)
+   * @exception SQLException If an error occurs.
+   */
+  void setFetchDirection(int direction) throws SQLException;
+
+  /**
+   * This method returns the current direction that the driver thinks the
+   * result set will be accessed int.
+   *
+   * @return The direction the result set will be accessed in (????)
+   * @exception SQLException If an error occurs.
+   */
+  int getFetchDirection() throws SQLException;
+
+  /**
+   * This method informs the driver how many rows it should fetch from the
+   * database at a time.
+   *
+   * @param numrows The number of rows the driver should fetch at a time
+   *        to populate the result set.
+   * @exception SQLException If an error occurs.
+   */
+  void setFetchSize(int rows) throws SQLException;
+
+  /**
+   * This method returns the number of rows the driver believes should be
+   * fetched from the database at a time.
+   *
+   * @return The number of rows that will be fetched from the database at a time.
+   * @exception SQLException If an error occurs.
+   */
+  int getFetchSize() throws SQLException;
+
+  /**
+   * This method returns the concurrency type of the result set for this
+   * statement. This will be one of the concurrency types defined in
+   * <code>ResultSet</code>.
+   *
+   * @return The concurrency type of the result set for this statement.
+   * @exception SQLException If an error occurs.
+   * @see ResultSet
+   */
+  int getResultSetConcurrency() throws SQLException;
+
+  /**
+   * This method returns the result set type for this statement.  This will
+   * be one of the result set types defined in <code>ResultSet</code>.
+   *
+   * @return The result set type for this statement.
+   * @exception SQLException If an error occurs.
+   * @see ResultSet
+   */
+  int getResultSetType() throws SQLException;
+
+  /**
+   * This method adds a SQL statement to a SQL batch.  A driver is not
+   * required to implement this method.
+   *
+   * @param sql The sql statement to add to the batch.
+   * @exception SQLException If an error occurs.
+   */
+  void addBatch(String sql) throws SQLException;
+
+  /**
+   * This method clears out any SQL statements that have been populated in
+   * the current batch.  A driver is not required to implement this method.
+   *
+   * @exception SQLException If an error occurs.
+   */
+  void clearBatch() throws SQLException;
+
+  /**
+   * This method executes the SQL batch and returns an array of update
+   * counts - one for each SQL statement in the batch - ordered in the same
+   * order the statements were added to the batch.  A driver is not required
+   * to implement this method.
+   *
+   * @return An array of update counts for this batch.
+   * @exception SQLException If an error occurs.
+   */
+  int[] executeBatch() throws SQLException;
+
+  /**
+   * This method returns the <code>Connection</code> instance that was
+   * used to create this object.
+   *
+   * @return The connection used to create this object.
+   * @exception SQLException If an error occurs.
+   */
+  Connection getConnection() throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  boolean getMoreResults(int current) throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  ResultSet getGeneratedKeys() throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  int executeUpdate(String sql, int autoGeneratedKeys)
+    throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  int executeUpdate(String sql, int[] columnIndexes)
+    throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  int executeUpdate(String sql, String[] columnNames)
+    throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  boolean execute(String sql, int autoGeneratedKeys)
+    throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  boolean execute(String sql, int[] columnIndexes) throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  boolean execute(String sql, String[] columnNames)
+    throws SQLException;
+
+  /**
+   * @since 1.4
+   */
+  int getResultSetHoldability() throws SQLException;
+}