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Vector map library written in Java - running on Android and Desktop.

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package jsqlite;

/**
 * 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.


     * 
     * Example:

     * 
     * ...
     * 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) {
     * }
     * 
     *
     * @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 jsqlite.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 jsqlite.Exception;

    /**
     * Abort the compiled SQLite VM.
     */

    public native void stop() throws jsqlite.Exception;

    /**
     * Destructor for object.
     */

    protected native void finalize();

    /**
     * Internal native initializer.
     */

    private static native void internal_init();

    static {
        internal_init();
    }
}