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7.4.7 Converting a Class to an Entity or Vice Versa MoML You can convert a class to an instance entity simply by referencing it using the entity element, as in the following: ... contents ... This will result in an entity named “class” rather than a class. You can convert it back by referencing it with a class element, as in Note that if a class is converted to an instance and there are either subclasses or instances of the class that have been defined, those subclasses and instances will be orphaned. Hence, this should done with caution. 7.4.8 Changing Documentation, Properties, and Directors Documentation is attached to entities using the doc element (see section 7.3.7). A doc element can optionally be given a name; if no name is given, then the name is implicitly “_doc”. To replace a doc element, just give a new doc element with the same name. To remove a doc element, give a doc element with the same name and an empty body, as in or Properties can have their value changed using the property element (see section 7.3.6) with a new value, for example: A property can be deleted using the deleteProperty element Since a director is a property, this same mechanism can be used to remove a director. 7.4.9 Removing Links To remove individual links, use the unlink element. This element has three forms. The first is 216 Ptolemy <strong>II</strong>
MoML This unlinks a port from the specified relation. If the port is linked more than once to the specified relation, then all links to this relation are removed. It makes no difference whether the link is an inside link or an outside link, since this can be determined from the containers of the port and the relation. The unlink elements may appear anywhere in the body of the entity or class element. They will be processed after all the contained entities, properties, and relations are created, and before any are removed. However, the order of the unlink elements relative to each other does matter. The second and third forms are These both remove a link by index number. The first is used for an outside link, and the second for an inside link. The valid indices range from 0 to one less than the number of links that the port has. If the port is not a multiport, then there is at most one valid index, number 0. If an invalid index is given then the element is ignored. Note that the indexes of links above that of the removed link will be decremented by one. The unlink element can also be used to remove null links. For example, if we have created a link with where there was previously no link on this port, then this leaves a null link (not linked to anything) with index 0 (see section 7.3.9), and of course a link to relation r with index 1. The null link can be removed with which leaves the link to r as the sole link, having index 0. Note that the index is not the same thing as the channel number. A relation may have a width greater than one, so a single link may represent more than one channel (actually, it could even represent zero channels if that relation is not linked to other suitable ports). 7.4.10 Grouping Elements Occasionally, you may wish to incrementally parse a set of elements. For example, in the Ptolemy <strong>II</strong> implementation, the parser has a method for setting the context, so you could set the context to a CompositeEntity and then create several entities by parsing the following MoML: However, the XML parser will fail to parse this because it requires that there be a single top-level element. The group element is provided for this purpose: Heterogeneous Concurrent Modeling and Design 217
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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
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Designing Actors makes such actors
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Designing Actors same parameter val
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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 and 220: MoML found. For example, if the cla
Page 221 and 222: MoML it cannot collide with the nam
Page 223 and 224: MoML The rendering of the icon is d
Page 225: MoML 7.4.5 Deleting Entities, Relat
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
Page 271 and 272: coin flips 142 Color class 173 colo
Page 273 and 274: entity in XML 198 EntityLibrary cla
Page 275 and 276: 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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