Examples of ptolemy.actor.util.FIFOQueue

ptolemy.actor.util.FIFOQueue
A first-in, first-out (FIFO) queue with variable capacity and optional history. Objects are appended to the queue with the put() method, and removed from the queue with the take() method. The object removed is the oldest one in the queue. By default, the capacity is infinite, but it can be set to any nonnegative size. If the history capacity is greater than zero (or infinite, by setting the capacity to INFINITE_CAPACITY), then objects removed from the queue are transferred to a history queue rather than simply removed. By default, the history capacity is zero. @author Edward A. Lee, Xiaojun Liu @version $Id: FIFOQueue.java,v 1.49 2005/07/08 19:39:37 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (liuj)

        // Put the delay port at the bottom of the icon by default.
        StringAttribute cardinality = new StringAttribute(
                serviceTime.getPort(), "_cardinal");
        cardinality.setExpression("SOUTH");


        _queue = new FIFOQueue();


        size = new TypedIOPort(this, "size", false, true);
        size.setTypeEquals(BaseType.INT);
        // Put it at the bottom of the icon by default.
        cardinality = new StringAttribute(size, "_cardinal");

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     *   has an attribute that cannot be cloned.
     */
    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        Server newObject = (Server) super.clone(workspace);
        newObject.output.setTypeSameAs(newObject.input);
        newObject._queue = new FIFOQueue();
        return newObject;
    }

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        size.setTypeEquals(BaseType.INT);
        // Put it at the bottom of the icon by default.
        cardinality = new StringAttribute(size, "_cardinal");
        cardinality.setExpression("SOUTH");


        _queue = new FIFOQueue();


        capacity = new Parameter(this, "capacity");
        capacity.setTypeEquals(BaseType.INT);
        capacity.setExpression("0");

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     *  @exception CloneNotSupportedException If a derived class has
     *   has an attribute that cannot be cloned.
     */
    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        Queue newObject = (Queue) super.clone(workspace);
        newObject._queue = new FIFOQueue();
        newObject.output.setTypeAtLeast(newObject.input);
        return newObject;
    }

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