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Sybase 7.5 manual Defining classes

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Chapter 2 Building an Object-Oriented Model

Defining classes

A class is a description of a set of objects that have a similar structure and behavior, and share the same attributes, operations, relationships, and semantics. A class usually implements one or more interfaces.

Classes are the main building blocks of an OOM. Classes, and the relationships that you create between them, form the basic structure of an OOM. Typically, classes represent either real, abstract or conceptual things that together make a whole or a part of a particular problem or system.

The following example shows the class Printer with its attributes and operations.

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Contents

User’s Guide Page Contents 103 Modifying the code of an implementation operation100 Changing an association into an associative class 102 112 111 Generating Objects from an OOM 179 Vii Using Object Languages 229 Viii About This Book Subject Audience Where to find information Use these parts of the book If you want to Object-Oriented Model Basics Contents Build an Object-Oriented Model OOM Functional overview UML and object-oriented modeling What is an OOM? OOM rolesOOM creation Selection Tool Description Objects in an OOMAn OOM represents the interaction of the following objects Object To create an OOM Creating a new OOM Object-Oriented Model Basics Opening an existing OOM An OOM has the file extension .OOMTo open an existing OOM Defining OOM model options ClassesYou can set the following option for classes in an OOM To define OOM model options Non-divergenceResult Defining OOM properties To modify the model propertiesLength Defining OOM properties Building an Object-Oriented Model Package properties Defining packages Displaying text in package symbols To modify the package display preferencesPreference Defining packages Defining classes Maximum length Class propertiesClass has the following general properties Property Description New stereotypes Analyzing class propertiesStereotype Modify or creating Stereotype Type Visible Creating a classVisibility Cardinality To create a class from the Browser Accessing the list of classesCreating a class from the Browser Creating a class from the list of classes Creating a class from a diagram To create a class in a diagramInner classes Opening property sheets at last accessed Attaching an inner class to a classTo declare an inner class within a class Building an Object-Oriented Model To detach an inner class from a class Detaching an inner class from a class To modify class properties from its property sheet ClassifiersModifying class properties Modifying class properties from its property sheet To modify class properties from the list of classes Modifying class properties from the list of classes Adding objects to a class To add an attribute to a class Adding an attribute to a class To add an operation to a class Adding an operation to a class Defining classes To preview the code of a class Preview the code of a class or an interface To modify the class display preferences Displaying text in class symbols Building an Object-Oriented Model Defining interfaces Interface propertiesAn interface has the following properties Visibility Analyzing interface propertiesCreating an interface Creating an interface from the Browser Creating an interface from the list of interfaces Creating an interface from a diagramAccessing the list of interfaces To create an interface in a diagram Modifying interface properties Modifying interface properties from its property sheetTo modify interface properties from its property sheet Select Model Interfaces Modifying interface properties from the list of interfacesInterface property sheet opens to the General To modify interface properties from the list of interfaces Adding objects to an interface Adding inner classes to an interface Adding an attribute to an interface You can add the following objects to an interfaceTo add an attribute to an interface Building an Object-Oriented Model To add an operation to an interface Adding an operation to an interface To preview the code of an interface Preview the code of an interface Code Preview page appears Click OK Displaying text in interface symbols To modify the interface display preferences Defining attributes An attribute has the following properties Attribute properties Data Type Analyzing attribute properties To create an attribute from the Browser Creating an attributeMultiplicity Creating an attribute from the Browser Select Model Attributes. The list of attributes appears Accessing the list of attributesCreating an attribute from the list of attributes To create an attribute by inserting it in the list To create an attribute from a class in a diagram Creating an attribute from a class in a diagram Modifying attribute properties To modify attribute properties from its property sheet Modifying attribute properties from its property sheet Modifying attribute properties from the list of attributes To modify attribute properties from the list of attributesSelect Model Attributes To attach an attribute to a domain Attaching an attribute to a domain Attribute property sheet opens to the General To copy an attribute to another class Copying an attribute to another class To modify the display preferences Displaying text in attribute symbolsWhen selected An attribute has the following display preferences Building an Object-Oriented Model Defining identifiers Identifier propertiesAn identifier has the following properties Creating an identifier You can create an identifier from a classTo create an identifier Adding attributes to an identifier You can add attributes to an identifierTo add attributes to an identifier Modifying identifier properties Modifying identifier properties from its property sheetTo modify identifier properties from its property sheet Modifying identifier properties from the list of identifiers Defining operations Operation propertiesAn operation has the following properties To create an operation from the Browser Analyzing operation propertiesCreating an operation Creating an operation from the Browser Select Model Operations. The list of operations appears Accessing the list of operationsCreating an operation from the list of operations To create an operation by inserting it in the list To create an operation from a class in a diagram Creating an operation from a class in a diagram Modifying operation properties Modifying operation properties from its property sheetTo modify operation properties from its property sheet Select Model Operations Modifying operation properties from the list of operationsOperation property sheet opens to the General To modify operation properties from the list of operations Adding constructors and destructors to a class To add a Default constructor and destructor to a class Adding a Default constructor and destructor to a class Building an Object-Oriented Model To add a Copy constructor to a class Adding a Copy constructor to a class Adding operations to a class Adding a duplicate operation to a classTo add a duplicate operation to a class To add an inherited operation to a class Adding an operation from a parent class Operation Adding Getter and Setter operations to a class Defining operations Creating an implementation operation To create an implementation operation To modify the code of an implementation operation Modifying the code of an implementation operation To copy an operation to another class Copying an operation to another class An operation has the following display preferences Displaying text in operation symbols To modify the display preferences Modify the operation display preferences Click OK Defining parameters Parameter propertiesDirection To create a parameter Creating a parameter Parameter property sheet opens to the General Defining generalizations Generalization propertiesGeneralization has the following properties Analyzing generalization properties Creating a generalizationTo create a generalization Dragging a generalization to a different class Link appears between the two objects Modifying generalization properties Modifying generalization properties from its property sheetTo modify generalization properties from its property sheet Generalization has the following display preferences Displaying text in generalization symbols To modify the display preferences Class plays as viewed by the opposite class Omitted when end names are usedDefining associations Association Ends An association has the following properties Association properties Dragging an association to a different class Creating an association outside of a diagramTo create an association in a diagram Creating an association Analyzing cardinality properties Association property sheet opens to the General100 Indicates Association role propertiesOrdering 101 Right-click an association Changing an association into an associative classAggregation/composition of an Association To change an association into an associative class 103 Modifying association propertiesModifying association properties from its property sheet To modify association properties from its property sheet 104 Modifying cardinality propertiesTo modify association cardinality properties Double-click the association in the model 105 Displaying text in association symbols To modify the association display preferences106 107 108 Defining dependenciesDependency properties Dependency has the following properties Creating a dependency To create a dependency109 110 Dragging a dependency to a different class 111 Modifying dependency propertiesModifying dependency properties from its property sheet To modify dependency properties from its property sheet Displaying text in dependency symbols Dependency has the following display preferences112 113 114 Defining realizationsRealization properties Realization has the following properties 115 Creating a realizationTo create a realization Dragging a realization to a different class Modifying realization properties Modifying a realization from its property sheet116 117 To modify realization properties from its property sheet 118 Displaying text in realization symbolsModifying a realization from the list of realizations Realization has the following display preferences 119 120 Defining domainsDomain properties Each domain definition includes the following properties To create a domain Accessing the List of DomainsCreating a domain You create a domain from the list of domains 122 Indicating data type, length, and precisionLength Precision 123 Selecting a data type for a domainSelecting a data type for a domain from the list To select a data type for a domain from the list Selecting a data type from a list of standard data types Selecting a data type for a domain from its property sheetUndefined data type To select a data type for a domain from its property sheet Selecting a data type from a list of standard data types Change of data type appears in the list of domains125 Numeric data types Character data types126 Selecting from the Data Type dropdown listbox Time data typesOther data types To select a data type from a list of standard data types 128 129 Accessing a property sheet from the BrowserModifying domain properties To modify domain properties Setting standard check parameters for objects Defining check parameters130 Variable Defining additional check parameters for objectsTo set standard parameters 131 Using a validation rule in check parameters To define additional check parameters132 To use a validation rule in check parameters Validation rule expressions133 134 135 Managing Object-Oriented Models Checking an OOM Object parameters verified by Check model136 Message Description Indicating error severityOOM check options 137 To check a OOM Objects selected in the diagramObject selection in the Check Model Checking a OOM 139 140 Selecting all or clearing all checkboxes 141 Symbol OptionMaking corrections based on OOM check results Dockable result window Making manual corrections to an OOM Making automatic corrections to the OOM 143 144 Merging two OOM To open a Rose model in PowerDesigner Opening a Rose model in an OOM145 146 Objects importedAll objects Class Generalization Association Attribute Objects not importedPackage Class Interface 148 OperationGeneralization Dependency 149 Reverse Engineering What is reverse engineering? Parsing150 Outer class Reverse engineering JavaTogether classes that logically belong together Inner classes To define Java reverse engineering options Reverse engineering Java optionsJava code Comments Loading a JDK library model in the workspace To load a JDK library model153 154 Reverse engineering Java source files without code bodyTo reverse java without code body Select the .java radio button 155 156 Reverse engineering Java source filesSelect the Ignore operation body checkbox Click OK To reverse engineer .java files 157 Reversing without the body of the code 158 To reverse engineer compiled Java files to a diagramReverse engineering compiled Java files Multi-selection 159 160 Reverse engineering Java files from a source directory To reverse engineer Java files from a source directory161 162 To reverse engineer .jar or .zip files to a diagram Reverse engineering archived .jar or .zip files163 164 165 Reverse engineering PowerBuilder Reverse engineering PowerBuilder options166 167 To define PowerBuilder reverse engineering options Loading a PowerBuilder library model in the workspace To load a PowerBuilder library model168 169 Reverse engineering objects from a PowerBuilder application 170 To reverse engineer PowerBuilder objects from SRU files Reverse engineering objects from SRU files171 172 173 XML Data XML SchemaReverse engineering XML Reverse engineering XML options 175 Reverse engineering XML filesTo define XML reverse engineering options XML files can be reversed into an OOM 176 To reverse engineer an XML file Reverse engineering into a new OOM To reverse engineer object language files into a new OOM177 178 This product includes XML4C 3.0.1 software developed by This chapter describes how to generate objects from an OOM About this chapter179 Generating objects Selecting objects to include in the generation180 Selection tips Graphically selected objectsSelecting objects Select tools Visibility sort Generating Java source filesDefining Java generation options Check model 183 To define Java generation options Generating Java class definition files To generate .java files184 Select the classes that you want to generate from the list Select Tools185 Creating Java BeanInfo classes Navigating between pages186 187 To create Java BeanInfo classes 188 Sru files Generating objects for PowerBuilderDefining PowerBuilder generation options Pbl application 190 To define PowerBuilder generation options Generating objects for a PowerBuilder application Click Apply Click Cancel191 192 Generating PowerBuilder objects in sru files To generate PowerBuilder user objects in sru files193 194 195 Generating for XMLDefining XML generation options To define XML generation options 196 Generating XML objects 197 To generate XML files 198 199 Customizing scripts 200 201 OOM object Generating OOM objects to a CDMTranslating OOM objects into CDM objects 202 Java data type Translating OOM data types for a CDMTranslating Java data types for a CDM 203 Generating a CDM from an OOM Generating and updating a CDM204 You can set the following general generation options Update existingCDM generation options Clearing the Preserve Modifications checkbox 206 Object selection parametersCheck model before generation Objects selected in the model Generating a new CDM To generate to a new CDM from an OOM207 208 209 Generating a CDM from a package Preserve Modifications To update an existing CDM by generating from an OOMUpdating an existing CDM 210 211 Preserve modifications 212 213 Merging models 214 215 Associations Generating OOM objects to a PDMTranslating OOM objects into PDM objects Generating from Translation example for SQL Anywhere Translating OOM data types for a PDMTranslating Java data types for a PDM 217 218 Generating a PDM from an OOMGenerating and updating a PDM Generate new Physical Data 219 Physical Data Defining PDM generation options You select objects for PDM generation from the Selection220 221 Generating a new PDMTo generate to a new PDM from an OOM Select Tools Generate Physical Data Model 222 223 Generating a PDM from a package To update an existing PDM by generating from an OOM Updating an existing PDM224 225 226 227 228 229 Using Object Languages Object language type Object languagesTypes of object language 230 Open an OOM Select Language Edit Current Object Language Accessing object language propertiesModifying the current object language To modify a value of a current object language 232 Modifying linked object language properties To modify the parameters of a linked object language233 234 To create a new object language Changing the object language of an OOMCreating a new object language To change the object language of an OOM 236 237 238 Values Using the object language editorCategories Fields Following editing options appear Modifying values in the object language editorObject language Editor edit menu Stereotypes Object language editor categoriesGeneral category UML category Class has the following default stereotypes Class stereotypes242 Generalization stereotypes An operation has the following default stereotypeGeneralization has the following default stereotype Operation stereotypes Dependency has the following default stereotypes Dependency stereotypes244 245 Package has the following default stereotypesScript category Package stereotypes 246 Default constantsFollowing constant values are defined by default Object scripts Specification 247Example 248 Default data typesXML Mapping You can modify the following basic data types 249 Extended Attributes categoryNamings Event 250 251 Using Business Rules 252 What is a business rule? Rule type Defining business rules in an OOMTypes of business rule 253 254 Business rule propertiesCreating a business rule Business rule definition includes the following properties 255 To create a business rule 256 Applying business rules to objectsApplying a business rule to an object To apply a business rule to an object 257 Attaching an expression to a business rule 258 259 Glossary 260 Glossary 261 Stereotype Transient object Visibility 262 263 Index OOM 264 265 Class 266 267 268 269 JDK 270 Model 271 272 Open 273 274 Role 275 276 277 278