Module com.semanticcms.core.servlet

Package com.semanticcms.core.servlet

Class View

java.lang.Object

com.semanticcms.core.servlet.View

All Implemented Interfaces:

Comparable<View>

public abstract class View
extends Object
implements Comparable<View>

A site may provide multiple views of the data. Except the default content view, views will typically show something about the current page and all of its children.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	View.Group	View groupings, in order.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	TITLE_SEPARATOR	The separator used between segments of the title.

Constructor Summary

Constructors

Constructor	Description
View()

Method Summary

Modifier and Type	Method	Description
int	compareTo(View o)	Orders by group, display, then name.
void	configureResources(ServletContext servletContext, HttpServletRequest req, HttpServletResponse resp, Theme theme, Page page, Registry requestRegistry)	Configures the request-scope web resources that this view uses.
abstract <__ extends FlowContent<__>> void	doView(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, __ flow, Page page)	Renders the view.
boolean	equals(Object obj)	Two views with the same name are considered equal.
abstract boolean	getAllowRobots(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets whether robots are allowed to access this view to the given page.
boolean	getAppliesGlobally()	Checks if a view applies in global navigation context.
Set<Author>	getAuthors(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the author(s) for the view on the given page.
String	getCanonicalUrl(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the canonical URL for the given page in this view.
Copyright	getCopyright(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the copyright information for the view on the given page.
abstract String	getDescription(Page page)	Gets the description for this view of the given page or null for none.
abstract String	getDisplay()	Gets the display name for this view.
abstract View.Group	getGroup()	Gets the grouping for this view.
abstract String	getKeywords(Page page)	Gets the keywords for this view of the given page or null for none.
ReadableInstant	getLastModified(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the effective last modified time, if known, for the given page in this view.
String	getLinkCssClass(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response)	Gets the CSS class to use for the main navigation link to this view.
String	getLinkId()	Gets an id to use for the main navigation link to this view.
Map<String,List<String>>	getLinkParams(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the optional additional parameter to a view link.
Collection<Link>	getLinks(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets an optional set of additional links to include for this view in the order they should be added.
abstract String	getName()	Gets the unique name of this view.
Map<String,String>	getScripts()	Gets any per-view scripts, when have the same name as globally registered scripts, must have matching src.
String	getTitle(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Gets the page title for the view on the given page.
int	hashCode()	Consistent with equals, hashCode based on name.
boolean	isApplicable(ServletContext servletContext, HttpServletRequest request, HttpServletResponse response, Page page)	Checks if a view is applicable the given request and page.
final boolean	isDefault()	Checks if this is the default view.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

TITLE_SEPARATOR

protected static final String TITLE_SEPARATOR

The separator used between segments of the title. Should this be provided by the template?

See Also:

• Constant Field Values

Constructor Details

View

public View()

Method Details

compareTo

public int compareTo(View o)

Orders by group, display, then name.

Specified by:

compareTo in interface Comparable<View>

equals

public boolean equals(Object obj)

Two views with the same name are considered equal.

Overrides:

equals in class Object

hashCode

public int hashCode()

Consistent with equals, hashCode based on name.

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

See Also:

• getDisplay()

getGroup

public abstract View.Group getGroup()

Gets the grouping for this view.

getDisplay

public abstract String getDisplay()

Gets the display name for this view.

getName

public abstract String getName()

Gets the unique name of this view.

isDefault

public final boolean isDefault()

Checks if this is the default view.

getAppliesGlobally

public boolean getAppliesGlobally()

Checks if a view applies in global navigation context.

Implementation Note:
returns true by default

isApplicable

public boolean isApplicable(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                     throws ServletException,
IOException

Checks if a view is applicable the given request and page. For correct determination, the page must have been captured at CaptureLevel.META level or higher.

TODO: Store the captureLevel in effect when a page is captured, and confirm that here and other places where certain capture levels are required for correct behavior. Could also automatically re-capture at a higher level instead of throwing an exception.

Implementation Note:
returns true by default

Throws:

ServletException

IOException

getLinkId

public String getLinkId()

Gets an id to use for the main navigation link to this view.

Implementation Note:
returns null by default

Returns:

the ID or null for none

getLinkCssClass

public String getLinkCssClass(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response)

Gets the CSS class to use for the main navigation link to this view.

Implementation Note:
returns null by default

Returns:

the CSS class or null for none

getLinkParams

public Map<String,List<String>> getLinkParams(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)

Gets the optional additional parameter to a view link.

Implementation Note:
returns empty map by default

getCanonicalUrl

public String getCanonicalUrl(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                       throws ServletException,
IOException

Gets the canonical URL for the given page in this view. Can not get canonical URLs for missing books. This might be called even when a page is not applicable to this view, such as when browing to an empty TODO list. By default, link parameters are not added.

This URL is absolute and has already been response encoded.

Throws:

ServletException

IOException

See Also:

• BookUtils.getCanonicalBase(javax.servlet.ServletContext, javax.servlet.http.HttpServletRequest, com.semanticcms.core.model.Book)

getLastModified

public ReadableInstant getLastModified(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                                throws ServletException,
IOException

Gets the effective last modified time, if known, for the given page in this view. This is used for things such as sitemaps.

Implementation Note:
This default implementation returns null indicating not applicable to this view.

Returns:

The effective last modified time or null if unknown or not applicable.

Throws:

ServletException

IOException

getCopyright

public Copyright getCopyright(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                       throws ServletException,
IOException

Gets the copyright information for the view on the given page.

Throws:

ServletException

IOException

See Also:

• CopyrightUtils.findCopyright(javax.servlet.ServletContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, com.semanticcms.core.model.Page)

getAuthors

public Set<Author> getAuthors(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                       throws ServletException,
IOException

Gets the author(s) for the view on the given page.

Throws:

ServletException

IOException

See Also:

• AuthorUtils.findAuthors(javax.servlet.ServletContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, com.semanticcms.core.model.Page)

getTitle

public String getTitle(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)

Gets the page title for the view on the given page.

Defaults to: "view.display - page.title[ - page.pageRef.book.title]"

getDescription

public abstract String getDescription(Page page)

Gets the description for this view of the given page or null for none.

getKeywords

public abstract String getKeywords(Page page)

Gets the keywords for this view of the given page or null for none.

configureResources

public void configureResources(ServletContext servletContext,
 HttpServletRequest req,
 HttpServletResponse resp,
 Theme theme,
 Page page,
 Registry requestRegistry)

Configures the request-scope web resources that this view uses.

Implementers should call super.configureResources(…) as a matter of convention, despite this default implementation doing nothing.

getLinks

public Collection<Link> getLinks(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                          throws ServletException,
IOException

Gets an optional set of additional links to include for this view in the order they should be added.

Please note, that any links to stylesheets here are never optimized. Please prefer configureResources(javax.servlet.ServletContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, com.semanticcms.core.servlet.Theme, com.semanticcms.core.model.Page, com.aoapps.web.resources.registry.Registry).

Throws:

ServletException

IOException

See Also:

• configureResources(javax.servlet.ServletContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, com.semanticcms.core.servlet.Theme, com.semanticcms.core.model.Page, com.aoapps.web.resources.registry.Registry)

getScripts

public Map<String,String> getScripts()

Gets any per-view scripts, when have the same name as globally registered scripts, must have matching src.

Implementation Note:
returns empty map by default

See Also:

• SemanticCMS.getScripts()

getAllowRobots

public abstract boolean getAllowRobots(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 Page page)
                                throws ServletException,
IOException

Gets whether robots are allowed to access this view to the given page. When true will include both "noindex, nofollow" in the head and put "nofollow" on links to this view.

Throws:

ServletException

IOException

doView

public abstract <__ extends FlowContent<__>> void doView(ServletContext servletContext,
 HttpServletRequest request,
 HttpServletResponse response,
 __ flow,
 Page page)
                                                  throws ServletException,
IOException,
SkipPageException

Renders the view. This is called by the template to fill-out the main content area.

TODO: Is SkipPageException acceptable at the view rendering stage?

Throws:

ServletException

IOException

SkipPageException