Class diagram is used to represent the static view of an application. The class diagrams are widely used in the modelling of object oriented systems because they are the only UML diagrams which can be mapped directly with object-oriented languages. Diagram supports to generate the class diagram shapes from business logic.
The UML class diagram shapes are explained as follows.
class
.name
, attributes
, and methods
of the class using the class property of node.name
, type
, and scope
properties allow you to define the name, data type, and visibility of the attribute.name
, parameters
, type
, and scope
properties allow you to define the name, parameter, return type, and visibility of the methods.import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { NodeModel, UmlClassifierShapeModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [nodes]='nodes'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public nodes: NodeModel[] = [
{
id: "Patient",
//Position of the node
offsetX: 200,
offsetY: 200,
shape: {
type: "UmlClassifier",
//Define class object
class: {
name: "Patient",
//Define class attributes
attributes: [{ name: "accepted", type: "Date" }],
//Define class methods
methods: [{ name: "getHistory", type: "getHistory" }]
},
classifier: "Class"
} as UmlClassifierShapeModel
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
interface
.name
, attributes
, and methods
of the interface using the interface property of the node.import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { NodeModel, UmlClassifierShapeModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [nodes]='nodes'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public nodes: NodeModel[] = [
{
id: "Patient",
//Position of the node
offsetX: 200,
offsetY: 200,
shape: {
type: "UmlClassifier",
//Define interface object
interface: {
name: "Patient",
//Define interface attributes
attributes: [{ name: "owner", type: "String[*]" }],
//Define interface methods
methods: [
{
name: "deposit",
parameters: [
{
name: "amount",
type: "Dollars"
}
]
}
]
},
classifier: "Interface"
} as UmlClassifierShapeModel
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
enumeration
. Also, define the name and members of the enumeration using the enumeration property of the node.import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { NodeModel, UmlClassifierShapeModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [nodes]='nodes'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public nodes: NodeModel[] = [
{
id: "Patient",
offsetX: 200,
offsetY: 200,
shape: {
type: "UmlClassifier",
//Define enumeration object
enumeration: {
name: "AccountType",
//set the members of enumeration
members: [
{
name: "Checking Account",
},
{
name: "Savings Account"
},
{
name: "Credit Account"
}
]
},
classifier: "Enumeration"
} as UmlClassifierShapeModel
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Shape | Image |
---|---|
Association |
![]() |
Aggregation |
![]() |
Composition |
![]() |
Inheritance |
![]() |
Dependency |
![]() |
Association is basically a set of links that connects elements of an UML model. The type of association are as follows.
The association property allows you to define the type of association. The default value of association is “Directional”. The following code example illustrates how to create an association.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
relationship: "Association",
//Define type of association
association: "BiDirectional"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Aggregation is a binary association between a property and one or more composite objects which group together a set of instances. Aggregation is decorated with a hollow diamond. To create an aggregation shape, define the relationship as “aggregation”.
The following code example illustrates how to create an aggregation.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
//Set an relationship for connector
relationship: "Aggregation"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Composition is a “strong” form of “aggregation”. Composition is decorated with a black diamond. To create a composition shape, define the relationship property of connector as “composition”.
The following code example illustrates how to create a composition.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
//Set an relationship for connector
relationship: "Composition"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Dependency is a directed relationship, which is used to show that some UML elements needs or depends on other model elements for specifications. Dependency is shown as dashed line with opened arrow. To create a dependency, define the relationship property of connector as “dependency”.
The following code example illustrates how to create an dependency.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
//Set relationship for connector
relationship: "Dependency"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Inheritance is also called as “generalization”. Inheritance is a binary taxonomic directed relationship between a more general classifier (super class) and a more specific classifier (subclass). Inheritance is shown as a line with hollow triangle.
To create an inheritance, define the relationship as “inheritance”.
The following code example illustrates how to create an inheritance.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
//set an relation of connector
relationship: "Inheritance"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Multiplicity is a definition of an inclusive interval of non-negative integers to specify the allowable number of instances of described element. The type of multiplicity are as follows.
lowerBounds
and upperBounds
could be natural constants or constant expressions evaluated to natural (non negative) number. Upper bound could be also specified as asterisk ‘*’ which denotes unlimited number of elements. Upper bound should be greater than or equal to the lower bound.import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: "connector",
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 300, y: 300 },
type: "Straight",
shape: {
type: "UmlClassifier",
relationship: "Dependency",
multiplicity: {
//Set multiplicity type
type: "OneToMany",
//Set source label to connector
source: {
optional: true,
lowerBounds: 89,
upperBounds: 67
},
//Set target label to connector
target: {
optional: true,
lowerBounds: 78,
upperBounds: 90
}
}
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
Activity diagram is basically a flowchart to represent the flow from one activity to another. The activity can be described as an operation of the system.
The purpose of an activity diagram can be described as follows.
To create a UmlActivity, define type as “UmlActivity” and the list of built-in shapes as demonstrated as follows and it should be set in the “shape” property.
Shape | Image |
---|---|
Action |
![]() |
Decision |
![]() |
MergeNode |
![]() |
InitialNode |
![]() |
FinalNode |
![]() |
ForkNode |
![]() |
JoinNode |
![]() |
TimeEvent |
![]() |
AcceptingEvent |
![]() |
SendSignal |
![]() |
ReceiveSignal |
![]() |
StructuredNode |
![]() |
Note |
![]() |
The following code illustrates how to create a UmlActivity shapes.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { NodeModel, UmlClassifierShapeModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [nodes]='nodes'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public nodes: NodeModel[] = [
{
id: "UmlDiagram",
//Set node size
width: 100,
height: 100,
//position the node
offsetX: 200,
offsetY: 200,
shape: {
type: "UmlActivity",
//Define UmlActivity shape
shape: "Action"
}
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
To create an UmlActivity connector, define the type as “UmlActivity” and flow as either “Exception” or “Control” or “Object”.
The following code illustrates how to create a UmlActivity connector.
import { Component, ViewEncapsulation, ViewChild } from "@angular/core";
import { DiagramComponent } from '@syncfusion/ej2-angular-diagrams';
import { ConnectorModel } from '@syncfusion/ej2-diagrams';
@Component({
selector: "app-container",
// specifies the template string for the diagram component
template: `<ejs-diagram id="diagram" width="100%" height="580px" [connectors]='connectors'></ejs-diagram>`
})
export class AppComponent {
@ViewChild("diagram")
public diagram: DiagramComponent;
public connectors: ConnectorModel[] = [
{
id: 'connector',
type: 'Straight',
//Define connector start and end points
sourcePoint: { x: 100, y: 100 },
targetPoint: { x: 200, y: 200 },
shape: { type: 'UmlActivity', flow: 'Exception' }
}
];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { DiagramModule, DiagramContextMenuService } from '@syncfusion/ej2-angular-diagrams';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, DiagramModule
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [DiagramContextMenuService]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
You can edit the name, attributes, and methods of the class diagram shapes just double clicking, similar to editing a node annotation.
The following image illustrates how the text editor looks in an edit mode.