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package SQLite;
/**
* Class to represent compiled SQLite VM.
*/
public class Vm {
/**
* Internal handle for the compiled SQLite VM.
*/
private long handle = 0;
/**
* Internal last error code for compile()/step() methods.
*/
protected int error_code = 0;
/**
* Perform one step on compiled SQLite VM.
* The result row is passed to the given callback interface.<BR><BR>
*
* Example:<BR>
* <PRE>
* ...
* try {
* Vm vm = db.compile("select * from x; select * from y;");
* while (vm.step(cb)) {
* ...
* }
* while (vm.compile()) {
* while (vm.step(cb)) {
* ...
* }
* }
* } catch (SQLite.Exception e) {
* }
* </PRE>
*
* @param cb the object implementing the callback methods.
* @return true as long as more row data can be retrieved,
* false, otherwise.
*/
public native boolean step(Callback cb) throws SQLite.Exception;
/**
* Compile the next SQL statement for the SQLite VM instance.
* @return true when SQL statement has been compiled, false
* on end of statement sequence.
*/
public native boolean compile() throws SQLite.Exception;
/**
* Abort the compiled SQLite VM.
*/
public native void stop() 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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