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package com.structurizr.view;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonSetter;
import com.structurizr.model.*;
import com.structurizr.util.StringUtils;
import javax.annotation.Nonnull;
import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
/**
* The superclass for all views that show elements/relationships from the model, namely:
*
* - Custom views
* - System landscape views
* - System context views
* - Container views
* - Dynamic views
* - Deployment views
*/
public abstract class ModelView extends View {
private static final int DEFAULT_RANK_SEPARATION = 300;
private static final int DEFAULT_NODE_SEPARATION = 300;
private SoftwareSystem softwareSystem;
private String softwareSystemId;
private PaperSize paperSize = null;
private Dimensions dimensions = null;
private AutomaticLayout automaticLayout = null;
private boolean mergeFromRemote = true;
private Set elementViews = new TreeSet<>();
private Set relationshipViews = new TreeSet<>();
private LayoutMergeStrategy layoutMergeStrategy = new DefaultLayoutMergeStrategy();
private ViewSet viewSet;
ModelView() {
}
ModelView(SoftwareSystem softwareSystem, String key, String description) {
this.softwareSystem = softwareSystem;
if (!StringUtils.isNullOrEmpty(key)) {
setKey(key);
} else {
throw new IllegalArgumentException("A key must be specified.");
}
setDescription(description);
}
/**
* Gets the model that this view belongs to.
*
* @return a Model object
*/
@JsonIgnore
public Model getModel() {
return softwareSystem.getModel();
}
/**
* Gets the software system that this view is associated with.
*
* @return a SoftwareSystem object, or null if this view is not associated with a software system (e.g. it's a system landscape view)
*/
@JsonIgnore
public SoftwareSystem getSoftwareSystem() {
return softwareSystem;
}
void setSoftwareSystem(SoftwareSystem softwareSystem) {
this.softwareSystem = softwareSystem;
}
/**
* Gets the ID of the software system this view is associated with.
*
* @return the ID, as a String, or null if this view is not associated with a software system (e.g. it's a system landscape view)
*/
public String getSoftwareSystemId() {
if (this.softwareSystem != null) {
return this.softwareSystem.getId();
} else {
return this.softwareSystemId;
}
}
void setSoftwareSystemId(String softwareSystemId) {
this.softwareSystemId = softwareSystemId;
}
/**
* Gets the paper size that should be used to render this view.
*
* @return a PaperSize
*/
public PaperSize getPaperSize() {
return paperSize;
}
public void setPaperSize(PaperSize paperSize) {
this.paperSize = paperSize;
}
public Dimensions getDimensions() {
return dimensions;
}
public void setDimensions(Dimensions dimensions) {
this.dimensions = dimensions;
}
/**
* Gets the automatic layout settings for this view.
*
* @return an AutomaticLayout object, or null if not enabled
*/
public AutomaticLayout getAutomaticLayout() {
return automaticLayout;
}
@JsonSetter
void setAutomaticLayout(AutomaticLayout automaticLayout) {
this.automaticLayout = automaticLayout;
}
/**
* Enables automatic layout for this view, with some default settings.
*/
public void enableAutomaticLayout() {
enableAutomaticLayout(AutomaticLayout.RankDirection.TopBottom, 300, 600, 200, false);
}
/**
* Enables automatic layout for this view, with the specified settings, using the Dagre implementation.
*
* @param rankDirection the rank direction
* @param rankSeparation the separation between ranks (in pixels, a positive integer)
* @param nodeSeparation the separation between nodes within the same rank (in pixels, a positive integer)
* @param edgeSeparation the separation between edges (in pixels, a positive integer)
* @param vertices whether vertices should be created during automatic layout
*/
public void enableAutomaticLayout(AutomaticLayout.RankDirection rankDirection, int rankSeparation, int nodeSeparation, int edgeSeparation, boolean vertices) {
this.automaticLayout = new AutomaticLayout(AutomaticLayout.Implementation.Dagre, rankDirection, rankSeparation, nodeSeparation, edgeSeparation, vertices);
}
/**
* Enables automatic layout for this view, with the specified direction, using the Graphviz implementation.
*
* @param rankDirection the rank direction
*/
public void enableAutomaticLayout(AutomaticLayout.RankDirection rankDirection) {
enableAutomaticLayout(rankDirection, DEFAULT_RANK_SEPARATION, DEFAULT_NODE_SEPARATION);
}
/**
* Enables automatic layout for this view, with the specified settings, using the Graphviz implementation.
*
* @param rankDirection the rank direction
* @param rankSeparation the separation between ranks (in pixels, a positive integer)
* @param nodeSeparation the separation between nodes within the same rank (in pixels, a positive integer)
*/
public void enableAutomaticLayout(AutomaticLayout.RankDirection rankDirection, int rankSeparation, int nodeSeparation) {
this.automaticLayout = new AutomaticLayout(AutomaticLayout.Implementation.Graphviz, rankDirection, rankSeparation, nodeSeparation, 0, false);
}
/**
* Disables automatic layout for this view.
*/
public void disableAutomaticLayout() {
this.automaticLayout = null;
}
/**
* Gets whether layout information for this view should be merged from a remote version of the workspace.
*
* @return true if layout information should be merged from the remote workspace, false otherwise
*/
public boolean getMergeFromRemote() {
return mergeFromRemote;
}
/**
* Specifies whether layout information for this view should be merged from a remote version of the workspace.
*
* @param mergeFromRemote true if layout information should be merged from the remote workspace, false otherwise
*/
@JsonIgnore
public void setMergeFromRemote(boolean mergeFromRemote) {
this.mergeFromRemote = mergeFromRemote;
}
protected final void addElement(Element element, boolean addRelationships) {
if (element == null) {
throw new IllegalArgumentException("An element must be specified.");
}
if (getModel().contains(element)) {
checkElementCanBeAdded(element);
elementViews.add(new ElementView(element));
if (addRelationships) {
addRelationships(element);
}
} else {
throw new IllegalArgumentException("The element named " + element.getName() + " does not exist in the model associated with this view.");
}
}
protected abstract void checkElementCanBeAdded(Element element);
private void addRelationships(Element element) {
Set elements = getElements().stream()
.map(ElementView::getElement)
.collect(Collectors.toSet());
// add relationships where the destination exists in the view already
for (Relationship relationship : element.getRelationships()) {
if (elements.contains(relationship.getDestination())) {
this.relationshipViews.add(new RelationshipView(relationship));
}
}
// add relationships where the source exists in the view already
for (Element e : elements) {
for (Relationship r : e.getRelationships()) {
if (r.getDestination().equals(element)) {
this.relationshipViews.add(new RelationshipView(r));
}
}
}
}
protected void removeElement(Element element) {
if (element == null) {
throw new IllegalArgumentException("An element must be specified.");
}
if (!canBeRemoved(element)) {
throw new IllegalArgumentException("The element named '" + element.getName() + "' cannot be removed from this view.");
}
ElementView elementView = new ElementView(element);
elementViews.remove(elementView);
for (RelationshipView relationshipView : getRelationships()) {
if (relationshipView.getRelationship().getSource().equals(element) ||
relationshipView.getRelationship().getDestination().equals(element)) {
remove(relationshipView.getRelationship());
}
}
}
protected RelationshipView addRelationship(Relationship relationship) {
if (relationship == null) {
throw new IllegalArgumentException("A relationship must be specified.");
}
if (isElementInView(relationship.getSource()) && isElementInView(relationship.getDestination())) {
RelationshipView relationshipView = new RelationshipView(relationship);
relationshipViews.add(relationshipView);
return relationshipView;
}
return null;
}
public boolean isElementInView(Element element) {
return this.elementViews.stream().anyMatch(ev -> ev.getElement().equals(element));
}
/**
* Removes a relationship from this view.
*
* @param relationship the Relationship to remove
*/
public void remove(Relationship relationship) {
if (relationship != null) {
RelationshipView relationshipView = new RelationshipView(relationship);
relationshipViews.remove(relationshipView);
}
}
/**
* Removes relationships that are not connected to the specified element.
*
* @param element the Element to test against
*/
public void removeRelationshipsNotConnectedToElement(Element element) {
if (element != null) {
getRelationships().stream()
.map(RelationshipView::getRelationship)
.filter(r -> !r.getSource().equals(element) && !r.getDestination().equals(element))
.forEach(this::remove);
}
}
/**
* Gets the set of elements in this view.
*
* @return a Set of ElementView objects
*/
public Set getElements() {
return new TreeSet<>(elementViews);
}
void setElements(Set elementViews) {
if (elementViews != null) {
this.elementViews = new TreeSet<>(elementViews);
}
}
/**
* Gets the set of relationships in this view.
*
* @return a Set of RelationshipView objects
*/
public Set getRelationships() {
return new TreeSet<>(this.relationshipViews);
}
void setRelationships(Set relationshipViews) {
if (relationshipViews != null) {
this.relationshipViews = new TreeSet<>(relationshipViews);
}
}
/**
* Removes all elements that have no relationships to other elements in this view.
*/
public void removeElementsWithNoRelationships() {
Set relationships = getRelationships();
Set elementIds = new HashSet<>();
relationships.forEach(rv -> elementIds.add(rv.getRelationship().getSourceId()));
relationships.forEach(rv -> elementIds.add(rv.getRelationship().getDestinationId()));
for (ElementView elementView : getElements()) {
if (!elementIds.contains(elementView.getId())) {
removeElement(elementView.getElement());
}
}
}
/**
* Sets the strategy used for merging layout information (paper size, x/y positioning, etc)
* from one version of this view to another.
*
* @param layoutMergeStrategy an instance of LayoutMergeStrategy
*/
public void setLayoutMergeStrategy(LayoutMergeStrategy layoutMergeStrategy) {
if (layoutMergeStrategy == null) {
throw new IllegalArgumentException("A LayoutMergeStrategy object must be provided.");
}
this.layoutMergeStrategy = layoutMergeStrategy;
}
/**
* Attempts to copy the visual layout information (e.g. x,y coordinates) of elements and relationships
* from the specified source view into this view.
*
* @param source the source View
*/
public void copyLayoutInformationFrom(@Nonnull ModelView source) {
layoutMergeStrategy.copyLayoutInformation(source, this);
}
/**
* Gets the element view for the given element.
*
* @param element the Element to find the ElementView for
* @return an ElementView object, or null if the element doesn't exist in the view
*/
public ElementView getElementView(@Nonnull Element element) {
Optional elementView = this.elementViews.stream().filter(ev -> ev.getId().equals(element.getId())).findFirst();
return elementView.orElse(null);
}
/**
* Gets the relationship view for the given relationship.
*
* @param relationship the Relationship to find the RelationshipView for
* @return a RelationshipView object, or null if the relationship doesn't exist in the view
*/
public RelationshipView getRelationshipView(@Nonnull Relationship relationship) {
Optional relationshipView = this.relationshipViews.stream().filter(rv -> rv.getId().equals(relationship.getId())).findFirst();
return relationshipView.orElse(null);
}
void setViewSet(@Nonnull ViewSet viewSet) {
this.viewSet = viewSet;
}
/**
* Gets the view set that this view belongs to.
*
* @return a ViewSet object
*/
@JsonIgnore
public ViewSet getViewSet() {
return viewSet;
}
protected abstract boolean canBeRemoved(Element element);
final void checkParentAndChildrenHaveNotAlreadyBeenAdded(StaticStructureElement elementToBeAdded) {
// check a parent hasn't been added already
Set idsOfElementsInView = getElements().stream().map(ElementView::getElement).map(Element::getId).collect(Collectors.toSet());
Element parent = elementToBeAdded.getParent();
while (parent != null) {
if (idsOfElementsInView.contains(parent.getId())) {
throw new ElementNotPermittedInViewException("A parent of " + elementToBeAdded.getName() + " is already in this view.");
}
parent = parent.getParent();
}
// and now check a child hasn't been added already
Set elementParentIds = new HashSet<>();
for (ElementView elementView : getElements()) {
Element element = elementView.getElement();
parent = element.getParent();
while (parent != null) {
elementParentIds.add(parent.getId());
parent = parent.getParent();
}
}
if (elementParentIds.contains(elementToBeAdded.getId())) {
throw new ElementNotPermittedInViewException("A child of " + elementToBeAdded.getName() + " is already in this view.");
}
}
protected void addNearestNeighbours(Element element, Class typeOfElement) {
if (element == null) {
return;
}
try {
addElement(element, true);
Set relationships = getModel().getRelationships();
relationships.stream().filter(r -> r.getSource().equals(element) && typeOfElement.isInstance(r.getDestination()))
.map(Relationship::getDestination)
.forEach(d -> {
try {
addElement(d, true);
} catch (ElementNotPermittedInViewException e) {
System.out.println(e.getMessage() + " (ignoring " + d.getName() + ")");
}
});
relationships.stream().filter(r -> r.getDestination().equals(element) && typeOfElement.isInstance(r.getSource()))
.map(Relationship::getSource)
.forEach(s -> {
try {
addElement(s, true);
} catch (ElementNotPermittedInViewException e) {
System.out.println(e.getMessage() + " (ignoring " + s.getName() + ")");
}
});
} catch (ElementNotPermittedInViewException e) {
System.out.println(e.getMessage() + " (ignoring " + element.getName() + ")");
}
}
}
