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package SQLite;
/**
* Class to represent compiled SQLite3 statement.
*
* Note, that all native methods of this class are
* not synchronized, i.e. it is up to the caller
* to ensure that only one thread is in these
* methods at any one time.
*/
public class Stmt {
/**
* Internal handle for the SQLite3 statement.
*/
private long handle = 0;
/**
* Internal last error code for prepare()/step() methods.
*/
protected int error_code = 0;
/**
* Prepare the next SQL statement for the Stmt instance.
* @return true when the next piece of the SQL statement sequence
* has been prepared, false on end of statement sequence.
*/
public native boolean prepare() throws SQLite.Exception;
/**
* Perform one step of compiled SQLite3 statement.
*
* Example:<BR>
* <PRE>
* ...
* try {
* Stmt s = db.prepare("select * from x; select * from y;");
* s.bind(...);
* ...
* s.bind(...);
* while (s.step(cb)) {
* Object o = s.value(...);
* ...
* }
* // s.reset() for re-execution or
* // s.prepare() for the next piece of SQL
* while (s.prepare()) {
* s.bind(...);
* ...
* s.bind(...);
* while (s.step(cb)) {
* Object o = s.value(...);
* ...
* }
* }
* } catch (SQLite.Exception e) {
* s.close();
* }
* </PRE>
*
* @return true when row data is available, false on end
* of result set.
*/
public native boolean step() throws SQLite.Exception;
/**
* Close the compiled SQLite3 statement.
*/
public native void close() throws SQLite.Exception;
/**
* Reset the compiled SQLite3 statement without
* clearing parameter bindings.
*/
public native void reset() throws SQLite.Exception;
/**
* Clear all bound parameters of the compiled SQLite3 statement.
*/
public native void clear_bindings() throws SQLite.Exception;
/**
* Bind positional integer value to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param value value of parameter
*/
public native void bind(int pos, int value) throws SQLite.Exception;
/**
* Bind positional long value to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param value value of parameter
*/
public native void bind(int pos, long value) throws SQLite.Exception;
/**
* Bind positional double value to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param value value of parameter
*/
public native void bind(int pos, double value) throws SQLite.Exception;
/**
* Bind positional byte array to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param value value of parameter, may be null
*/
public native void bind(int pos, byte[] value) throws SQLite.Exception;
/**
* Bind positional String to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param value value of parameter, may be null
*/
public native void bind(int pos, String value) throws SQLite.Exception;
/**
* Bind positional SQL null to compiled SQLite3 statement.
* @param pos parameter index, 1-based
*/
public native void bind(int pos) throws SQLite.Exception;
/**
* Bind positional zero'ed blob to compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @param length byte size of zero blob
*/
public native void bind_zeroblob(int pos, int length)
throws SQLite.Exception;
/**
* Return number of parameters in compiled SQLite3 statement.
* @return int number of parameters
*/
public native int bind_parameter_count() throws SQLite.Exception;
/**
* Return name of parameter in compiled SQLite3 statement.
* @param pos parameter index, 1-based
* @return String parameter name
*/
public native String bind_parameter_name(int pos) throws SQLite.Exception;
/**
* Return index of named parameter in compiled SQLite3 statement.
* @param name of parameter
* @return int index of parameter, 1-based
*/
public native int bind_parameter_index(String name)
throws SQLite.Exception;
/**
* Retrieve integer column from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return int column value
*/
public native int column_int(int col) throws SQLite.Exception;
/**
* Retrieve long column from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return long column value
*/
public native long column_long(int col) throws SQLite.Exception;
/**
* Retrieve double column from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return double column value
*/
public native double column_double(int col) throws SQLite.Exception;
/**
* Retrieve blob column from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return byte[] column value
*/
public native byte[] column_bytes(int col) throws SQLite.Exception;
/**
* Retrieve string column from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return String column value
*/
public native String column_string(int col) throws SQLite.Exception;
/**
* Retrieve column type from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return column type code, e.g. SQLite.Constants.SQLITE_INTEGER
*/
public native int column_type(int col) throws SQLite.Exception;
/**
* Retrieve number of columns of exec'ed SQLite3 statement.
* @return int number of columns
*/
public native int column_count() throws SQLite.Exception;
/**
* Retrieve column data as object from exec'ed SQLite3 statement.
* @param col column number, 0-based
* @return Object or null
*/
public Object column(int col) throws SQLite.Exception {
switch (column_type(col)) {
case Constants.SQLITE_INTEGER:
return new Long(column_long(col));
case Constants.SQLITE_FLOAT:
return new Double(column_double(col));
case Constants.SQLITE_BLOB:
return column_bytes(col);
case Constants.SQLITE3_TEXT:
return column_string(col);
}
return null;
}
/**
* Return table name of column of SQLite3 statement.
* @param col column number, 0-based
* @return String or null
*/
public native String column_table_name(int col) throws SQLite.Exception;
/**
* Return database name of column of SQLite3 statement.
* @param col column number, 0-based
* @return String or null
*/
public native String column_database_name(int col) throws SQLite.Exception;
/**
* Return declared column type of SQLite3 statement.
* @param col column number, 0-based
* @return String or null
*/
public native String column_decltype(int col) throws SQLite.Exception;
/**
* Return origin column name of column of SQLite3 statement.
* @param col column number, 0-based
* @return String or null
*/
public native String column_origin_name(int col) throws SQLite.Exception;
/**
* Destructor for object.
*/
protected native void finalize();
/**
* Internal native initializer.
*/
private static native void internal_init();
static {
internal_init();
}
}
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