Examples of org.apache.cayenne.access.DataDomain

org.apache.cayenne.access.DataDomain
DataDomain performs query routing functions in Cayenne. DataDomain creates single data source abstraction hiding multiple physical data sources from the user. When a child DataContext sends a query to the DataDomain, it is transparently routed to an appropriate DataNode. @author Andrus Adamchik

     * Helper method that updates domain properties. If a value equals to default, null
     * value is used instead.
     */
    protected void setDomainProperty(String property, String value, String defaultValue) {


        DataDomain domain = projectController.getCurrentDataDomain();
        if (domain == null) {
            return;
        }


        // no empty strings
        if ("".equals(value)) {
            value = null;
        }


        // use NULL for defaults
        if (value != null && value.equals(defaultValue)) {
            value = null;
        }


        Map properties = domain.getProperties();
        Object oldValue = properties.get(property);
        if (!Util.nullSafeEquals(value, oldValue)) {
            properties.put(property, value);


            DomainEvent e = new DomainEvent(this, domain);

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            projectController.fireDomainEvent(e);
        }
    }


    public String getDomainProperty(String property, String defaultValue) {
        DataDomain domain = projectController.getCurrentDataDomain();
        if (domain == null) {
            return null;
        }


        String value = (String) domain.getProperties().get(property);
        return value != null ? value : defaultValue;
    }

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    /**
     * Invoked on domain selection event. Updates view with the values from the currently
     * selected domain.
     */
    public void currentDomainChanged(DomainDisplayEvent e) {
        DataDomain domain = e.getDomain();
        if (null == domain) {
            return;
        }


        // extract values from the new domain object
        name.setText(domain.getName());


        cacheSize.setText(getDomainProperty(
                DataRowStore.SNAPSHOT_CACHE_SIZE_PROPERTY,
                Integer.toString(DataRowStore.SNAPSHOT_CACHE_SIZE_DEFAULT)));

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            throw new ValidationException("Enter name for DataDomain");
        }


        Configuration configuration = ((ApplicationProject) Application.getProject())
                .getConfiguration();
        DataDomain domain = projectController.getCurrentDataDomain();


        DataDomain matchingDomain = configuration.getDomain(newName);


        if (matchingDomain == null) {
            Domain prefs = projectController.getPreferenceDomainForDataDomain();


            DomainEvent e = new DomainEvent(this, domain, domain.getName());

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        if (domain.getName() == null) {
            throw new NullPointerException("Attempt to add DataDomain with no name.");
        }


        DataDomain old = dataDomains.put(domain.getName(), domain);
        if (old != null && old != domain) {
            dataDomains.put(domain.getName(), old);
            throw new IllegalArgumentException("Attempt to overwrite domain with name "
                    + domain.getName());
        }

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     * this Configuration object. Note that any domain database
     * connections remain open, and it is a responsibility of a
     * caller to clean it up.
     */
    public void removeDomain(String name) {
        DataDomain domain = dataDomains.remove(name);


        if (domain != null) {
            domain.setEventManager(null);
        }
    }

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        if (sort) {
            domains = Util.sortedIterator(domains, ProjectTraversal.dataDomainComparator);
        }


        while (domains.hasNext()) {
            DataDomain domain = (DataDomain) domains.next();
            ProjectPath domainPath = path.appendToPath(domain);
            handler.projectNode(domainPath);


            if (handler.shouldReadChildren(domain, path)) {
                this.traverseMaps(domain.getDataMaps().iterator(), domainPath);
                this.traverseNodes(domain.getDataNodes().iterator(), domainPath);
            }
        }
    }

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            return "UntitledDomain";
        }


        @Override
        protected Object create(String name, Object namingContext) {
            return new DataDomain(name);
        }

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            // top level object of the project
            if (namingContext == null) {
                return false;
            }


            DataDomain domain = (DataDomain) namingContext;
            return domain.getMap(name) != null;
        }

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            return new DataNode(name);
        }


        @Override
        protected boolean isNameInUse(String name, Object namingContext) {
            DataDomain domain = (DataDomain) namingContext;
            return domain.getNode(name) != null;
        }

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