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MoML This class extends Gen by adding two properties, and then sets the properties of the component entities to have values that are expressions. 7.3.11 Inheritance MoML supports inheritance by permitting you to extend existing classes. For example, consider the following MoML file: Here, the “derived” class extends the “base” class by adding another entity to it, and “instance” is an instance of derived. The class “derived” can also give a source attribute, which gives a URL for the source definition. A derived class (or subclass) can contain additional entities, relations, ports, and links. However, it cannot remove entities, relations, ports or links defined in the base class. Moreover, it cannot add links that are exclusively between ports and relations defined in the base class. New links must involve either a port or a relation that is new in the derived class. 7.3.12 Directors Recall that a clustered graph in MoML has no semantics. However, a particular model has semantics. It may be a dataflow graph, a state machine, a process network, or something else. To give it semantics, Ptolemy II requires the specification of a director associated with a model, an entity, or a class. The director is a property of the model. The following example gives discrete-event semantics to a Ptolemy II model: ... This example also sets a property of the director. The name of the director is not important, except that 210 Ptolemy II
MoML it cannot collide with the name of any other property in the model. 7.3.13 Input Element It is possible to insert MoML from another file or URL into a particular point in your model. For example: This takes the contents of the URL specified in the source attribute of the input element and places them inside the entity named “a”. The base of the current document (the one containing the import statement) is used to interpret a relative URL, or if the current document has no base, then the current working directory is used, or if that fails, the current CLASSPATH. 7.3.14 Annotations for Visual Rendering The abstract syntax of MoML, clustered graphs, is amenable to visual renditions as bubble and arc diagrams or as block diagrams. To support tools that display and/or edit MoML files visually, MoML allows a relation to have multiple vertices that form a path. Links can then be made to individual vertices. Consider the following example: This assumes that there are three entities named A, B, and C. The relation is annotated with a set of vertices, v1 and v2, which will normally be rendered as graphical objects. The vertices are linked together with paths, which in a simple visual tool might be straight lines, or in a more sophisticated tool might be autorouted paths. In the above example, v1 and v2 are linked by a path. The link elements specify not just a relation, but also a vertex within that relation. This tells the visual rendering tool to draw a path from the specified port to the specified vertex. Figure 7.8 illustrates how the above fragment might be rendered. The square boxes are icons for A B FIGURE 7.8. Example showing how MoML might be visually rendered. Heterogeneous Concurrent Modeling and Design 211 C
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PTOLEMY II HETEROGENEOUS CONCURRENT
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VOLUME 1 INTRODUCTION TO PTOLEMY II
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Volume 1 Contents Introduction to P
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2.10.3. Constructing Modal Models 8
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7. MoML 191 7.1. Introduction 191 7
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1 Introduction Author: Edward A. Le
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Introduction heterochronous dataflo
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Introduction A major emphasis in Pt
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Introduction determine when actors
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Introduction provides levels of vis
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Introduction is a guard, and the se
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Introduction well. All of these are
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Introduction clients to update thei
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Introduction will be supplied with
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Introduction 1.3.12 Synchronous Dat
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Introduction FIGURE 1.10. Refinemen
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Introduction occlusions due to terr
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Introduction tion. The overall arch
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Introduction kernel.attributes This
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Introduction 1.5.2 Overview of Key
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Introduction Actor interfaces are k
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Heterogeneous Concurrent Modeling a
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Introduction actor actor.gui data.e
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Introduction cient, scalable, and u
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Introduction 1.5.8 Future Capabilit
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Introduction Appendix A: UML — Un
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Introduction grams, the only constr
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2 Using Vergil Authors: Edward A. L
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Using Vergil 2.2.2 Executing a Pre-
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Using Vergil The Lorenz attractor m
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Using Vergil The Continuous-Time (C
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Using Vergil box in figure 2.11. En
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Using Vergil Don’t panic! Excepti
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Using Vergil tions are a normal par
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Using Vergil 2.4 Hierarchy Ptolemy
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Using Vergil Then using these ports
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Using Vergil the default 0.1 to 0.0
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Using Vergil pan window, it is easy
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Using Vergil FIGURE 2.33. The pan w
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Using Vergil we have modified the c
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Using Vergil model, simply copy (or
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Using Vergil A key issue is to deci
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Using Vergil instances. This proble
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Using Vergil quick tour for more de
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Using Vergil uses the index in the
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Using Vergil AddSubtract actor, and
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Using Vergil If you look inside the
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Using Vergil If you look inside the
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Using Vergil transition (or right c
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Using Vergil Once you have created
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Using Vergil The grid is turned off
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Authors: Edward A. Lee Xiaojun Liu
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Expressions classes to create a gen
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Expressions The % operation is a mo
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Expressions attribute, which includ
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Expressions 3.3.5 State Machines Ex
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Expressions whose value is an array
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Expressions from it. For instance,
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Expressions defined. For example, >
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Expressions length is given by the
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Expressions Thus, for example, you
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Expressions number. With one additi
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Expressions value. For example, fix
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Expressions In the example in figur
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Expressions A.2 Basic Mathematical
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Expressions A.3 Matrix, Array, and
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Expressions A.5 Signal Processing F
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Expressions TABLE 8: Functions perf
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4 Actor Libraries Authors: Elaine C
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Actor Libraries properly in the CT
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Actor Libraries ing that multiple c
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Actor Libraries TypedAtomicActor «
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Actor Libraries SequenceScope (exte
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Actor Libraries UnsignedByteArrayTo
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Actor Libraries MobileFunction (ext
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Actor Libraries LogicFunction (exte
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Actor Libraries Sleep (extends Tran
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Actor Libraries VariableFIR (extend
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Actor Libraries Integrator: Integra
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Actor Libraries Figure 4.4 shows th
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5 Designing Actors Authors: Christo
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Designing Actors /** Javadoc commen
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Designing Actors although with most
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Designing Actors import ptolemy.act
Page 169 and 170: Designing Actors makes such actors
Page 171 and 172: Designing Actors same parameter val
Page 173 and 174: Designing Actors morphic actor comp
Page 175 and 176: Designing Actors To get data polymo
Page 177 and 178: Designing Actors public class Seque
Page 179 and 180: Designing Actors be used in domains
Page 181 and 182: Designing Actors alComm actor. Beca
Page 183 and 184: Designing Actors attribute has valu
Page 185 and 186: Designing Actors import ptolemy.act
Page 187 and 188: 6 Coding Style Authors: Christopher
Page 189 and 190: Coding Style /* One line descriptio
Page 191 and 192: Coding Style Copyright (c) 2004 The
Page 193 and 194: Coding Style @version $Id: NamedObj
Page 195 and 196: Coding Style } We use instead the i
Page 197 and 198: Coding Style * @exception MyExcepti
Page 199 and 200: Coding Style + "it does not impleme
Page 201 and 202: Authors: Edward A. Lee Steve Neuend
Page 203 and 204: MoML cutes it forever, until you hi
Page 205 and 206: MoML A second difference between ou
Page 207 and 208: MoML
Page 209 and 210: MoML 7.3.3 Names and Classes Most M
Page 211 and 212: MoML Here, the element named
Page 213 and 214: MoML implement. 7.3.7 Doc Element S
Page 215 and 216: MoML It is also sometimes necess
Page 217 and 218: MoML then there will be a link t
Page 219: MoML found. For example, if the cla
Page 223 and 224: MoML The rendering of the icon is d
Page 225 and 226: MoML 7.4.5 Deleting Entities, Relat
Page 227 and 228: MoML This unlinks a port from the s
Page 229 and 230: MoML model. The EntityLibrary class
Page 231 and 232: MoML Suppose that using incremental
Page 233 and 234: MoML Generate a sine wave.
Page 235 and 236: MoML
Page 237 and 238: MoML Number of iterations in
Page 239 and 240: MoML -P- The f
Page 241 and 242: MoML -P- The phase,
Page 243 and 244: 8 Custom Applets Authors: Edward A.
Page 245 and 246: Custom Applets html code, see the J
Page 247 and 248: Custom Applets public class Tutoria
Page 249 and 250: Custom Applets then the result of
Page 251 and 252: Custom Applets 8.3.5 Using Model Pa
Page 253 and 254: Custom Applets ptolemy/domains/doma
Page 255 and 256: References [1] G. Agha, Actors: A M
Page 257 and 258: [33] S. A. Edwards, “The Specific
Page 259 and 260: [67] E. Kohler, The Click Modular R
Page 261 and 262: [95] J. Liu, X. Liu, T. J. Koo, B.
Page 263 and 264: [132]W. R. Sutherland, "The on-Line
Page 265 and 266: Glossary abstract syntax ..........
Page 267 and 268: Ptolemy II ........................
Page 269 and 270: Index Symbols - in UML 41 # in UML
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coin flips 142 Color class 173 colo
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entity in XML 198 EntityLibrary cla
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Director class 159 inverse FFT 124
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CompositeEntity class 206 nextPower
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safety 34 SampleDelay actor 78, 138
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type constraint 155 type constraint
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