AbstractMixer.java 文件源码

/**
 * The default implementation of this method just determines whether
 * this line is a source or target line, calls open(no-arg) on the
 * mixer, and adds the line to the appropriate vector.
 * The mixer may be opened at a format different than the line's
 * format if it is a DataLine.
 */
final synchronized void open(Line line) throws LineUnavailableException {

    if (Printer.trace) Printer.trace(">> AbstractMixer: open(line = " + line + ")");

    // $$kk: 06.11.99: ignore ourselves for now
    if (this.equals(line)) {
        if (Printer.trace) Printer.trace("<< AbstractMixer: open(" + line + ") nothing done");
        return;
    }

    // source line?
    if (isSourceLine(line.getLineInfo())) {
        if (! sourceLines.contains(line) ) {
            // call the no-arg open method for the mixer; it should open at its
            // default format if it is not open yet
            open(false);

            // we opened successfully! add the line to the list
            sourceLines.addElement(line);
        }
    } else {
        // target line?
        if(isTargetLine(line.getLineInfo())) {
            if (! targetLines.contains(line) ) {
                // call the no-arg open method for the mixer; it should open at its
                // default format if it is not open yet
                open(false);

                // we opened successfully!  add the line to the list
                targetLines.addElement(line);
            }
        } else {
            if (Printer.err) Printer.err("Unknown line received for AbstractMixer.open(Line): " + line);
        }
    }

    if (Printer.trace) Printer.trace("<< AbstractMixer: open(" + line + ") completed");
}