Examples of ptolemy.actor.util.FunctionDependency

ptolemy.actor.util.FunctionDependency

This is an abstract base class that describes the dependency that data at an output port has on data at an input port in a firing of the container, which is an entity. In particular, an output port does not depend on an input port if the fire() method of the container produces outputs on the output port or asserts that no outputs will be produced on the output port in this iteration without knowing anything about the input port (what data are there, or even whether there are data). The container is specified by the constructor argument and cannot be changed once this object is constructed.

This class uses a graph to describe the function dependency, where the nodes of the graph correspond to the ports and an edge indicates a function dependency. The edges go from input ports to output ports that depend on them.

The dependency graph by default indicates complete dependency, which means that each output port depends on all input ports. This default dependency graph is constructed in the protected method {@link #_constructDependencyGraph()}, which can be overridden in subclasses to construct a more accurate dependency graph. See {@link FunctionDependencyOfAtomicActor}and {@link FunctionDependencyOfCompositeActor} for exampleconcrete subclasses. The composite actor version analyzes the contained model to determine from the function dependencies of the contained actors and from the connections what the function dependencies of the composite actor are. @author Haiyang Zheng @version $Id: FunctionDependency.java,v 1.22 2007/12/07 06:26:46 cxh Exp $ @since Ptolemy II 4.0 @Pt.ProposedRating Green (hyzheng) @Pt.AcceptedRating Green (eal)

            // FIXME: The following is really problematic. Check the
            // DESchedulingTest3.xml as example (NOTE: I can't
            // find this example. EAL).
            if (ioPort.isOutput()) {
                // Get the function dependency of the container actor
                FunctionDependency functionDependency = portContainer
                        .getFunctionDependency();


                List inputPorts = functionDependency
                        .getInputPortsDependentOn(ioPort);
                Iterator inputsIterator = inputPorts.iterator();


                // Iterate all input ports the current output depends on to
                // find their maximum depth.

                    continue;
                }
            } else {
                // The ioPort is an output port.
                // Get the function dependency of the container actor
                FunctionDependency functionDependency = portContainer
                        .getFunctionDependency();
                inputPorts = functionDependency
                        .getInputPortsDependentOn(ioPort);
            }
            // Iterate all input ports the current output depends on,
            // find their maximum depth.
            Iterator inputsIterator = inputPorts.iterator();

Examples of ptolemy.actor.util.FunctionDependency

Related Classes of ptolemy.actor.util.FunctionDependency