org.zkoss.zk.ui
Interface WebApp

All Superinterfaces:

Locator, Scope

All Known Implementing Classes:

AbstractWebApp, SimpleWebApp

public interface WebApp
extends Scope, Locator

Represents a Web application. A web application is usually in form of a war file. An application might have multiple Web applications.

In HTTP, Web application represents a servlet context that supports ZK. In other word, a Web application is created if DHtmlLayoutServlet is declared in web.xml.

To get the current Web application, use Desktop.getWebApp().

Author:

tomyeh

Method Summary

java.lang.String	getAppName() Returns the application name, never null.
java.lang.Object	getAttribute(java.lang.String name) Returns the value of the specified custom attribute.
java.util.Map<java.lang.String,java.lang.Object>	getAttributes() Returns a map of custom attributes associated with this object.
java.lang.String	getBuild() Returns the build identifier, such as 2007121316.
Configuration	getConfiguration() Returns the configuration.
java.lang.String	getInitParameter(java.lang.String name) Returns the value of the named context-wide initialization parameter, or null if the parameter does not exist.
java.lang.Iterable<java.lang.String>	getInitParameterNames() Returns the names of the context's initialization parameters as an iterable String objects (never null).
java.lang.String	getMimeType(java.lang.String file) Returns the MIME type of the specified file, or null if the MIME type is not known.
java.lang.Object	getNativeContext() Deprecated. As of release 6.0.0, replaced with getServletContext().
java.lang.String	getRealPath(java.lang.String path) Returns a String containing the real path for a given virtual path.
java.net.URL	getResource(java.lang.String path) Returns a URL to the resource that is mapped to a specified path.
java.io.InputStream	getResourceAsStream(java.lang.String path) Returns the resource located at the named path as an InputStream object.
java.util.Set<java.lang.String>	getResourcePaths(java.lang.String path) Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument.
javax.servlet.ServletContext	getServletContext() Returns the servlet context of this application.
int	getSubversion(int portion) Returns a portion of the version in an integer by specifying its index.
java.lang.String	getUpdateURI() Returns the URI for asynchronous update.
java.lang.String	getUpdateURI(boolean encode) Returns the URI for asynchronous update that can be encoded or not.
java.lang.String	getVersion() Returns the ZK version, such as "1.1.0" and "2.0.0".
WebApp	getWebApp(java.lang.String uripath) Returns the WebApp that corresponds to a specified URL on the server, or null if either none exists or the container wishes to restrict this access..
void	log(java.lang.String msg) Writes the specified message to a servlet log file, usually an event log.
void	log(java.lang.String msg, java.lang.Throwable ex) Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file.
java.lang.Object	removeAttribute(java.lang.String name) Removes the specified custom attribute.
void	setAppName(java.lang.String name) Sets the application name.
java.lang.Object	setAttribute(java.lang.String name, java.lang.Object value) Sets the value of the specified custom attribute.

Methods inherited from interface org.zkoss.zk.ui.ext.Scope

addScopeListener, getAttribute, hasAttribute, hasAttribute, removeAttribute, removeScopeListener, setAttribute

Methods inherited from interface org.zkoss.util.resource.Locator

getDirectory

Method Detail

getAppName

java.lang.String getAppName()

Returns the application name, never null. Developer can set it to any name that describes his application.

Default: ZK

setAppName

void setAppName(java.lang.String name)

Sets the application name. Developer can set it to any name that describes his application.

getVersion

java.lang.String getVersion()

Returns the ZK version, such as "1.1.0" and "2.0.0".

See Also:

getSubversion(int), Utils.parseVersion(java.lang.String), Utils.compareVersion(int[], int[])

getBuild

java.lang.String getBuild()

Returns the build identifier, such as 2007121316.

Each time ZK is built, a different build identifier is assigned.

Since:

3.0.1

getSubversion

int getSubversion(int portion)

Returns a portion of the version in an integer by specifying its index. For example, getSubversion(0) returns the so-called major version (2 in "2.4.0"), getSubversion(1) returns the so-called minor version (4 in "2.4.0"), and both getSubversion(2) and getSubversion(3) return 0.

Parameters:

portion - which portion of the version; starting from 0. If you want to retrieve the major version, specify 0.

Since:

3.0.0

See Also:

getVersion()

getAttribute

java.lang.Object getAttribute(java.lang.String name)

Returns the value of the specified custom attribute.

Specified by:

getAttribute in interface Scope

setAttribute

java.lang.Object setAttribute(java.lang.String name,
                              java.lang.Object value)

Sets the value of the specified custom attribute.

Specified by:

setAttribute in interface Scope

Returns:

the previous value if any (since ZK 5)

removeAttribute

java.lang.Object removeAttribute(java.lang.String name)

Removes the specified custom attribute.

Specified by:

removeAttribute in interface Scope

Returns:

the previous value if any (since ZK 5)

getAttributes

java.util.Map<java.lang.String,java.lang.Object> getAttributes()

Returns a map of custom attributes associated with this object.

Specified by:

getAttributes in interface Scope

getWebApp

WebApp getWebApp(java.lang.String uripath)

Returns the WebApp that corresponds to a specified URL on the server, or null if either none exists or the container wishes to restrict this access..

getResource

java.net.URL getResource(java.lang.String path)

Returns a URL to the resource that is mapped to a specified path.

Notice that, since 3.6.3, this method can retrieve the resource starting with "~./". If the path contains the wildcard ('*'), you can use Execution.locate(java.lang.String) to convert it to a proper string first.

Specified by:

getResource in interface Locator

Returns:

a URL for reading the resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource

getResourceAsStream

java.io.InputStream getResourceAsStream(java.lang.String path)

Returns the resource located at the named path as an InputStream object.

Notice that, since 3.6.3, this method can retrieve the resource starting with "~./". If the path contains the wildcard ('*'), you can use Execution.locate(java.lang.String) to convert it to a proper string first.

Specified by:

getResourceAsStream in interface Locator

Returns:

an input stream for reading the resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource

getRealPath

java.lang.String getRealPath(java.lang.String path)

Returns a String containing the real path for a given virtual path. For example, the path "/index.html" returns the absolute file path on the server's filesystem would be served by a request for "http://host/contextPath/index.html", where contextPath is the context path of this WebApp.

Notice that ZK don't count on this method to retrieve resources. If you want to change the mapping of URI to different resources, override UiFactory.getPageDefinition(org.zkoss.zk.ui.sys.RequestInfo, java.lang.String) instead.

getMimeType

java.lang.String getMimeType(java.lang.String file)

Returns the MIME type of the specified file, or null if the MIME type is not known. The MIME type is determined by the configuration of the Web container.

Common MIME types are "text/html" and "image/gif".

getResourcePaths

java.util.Set<java.lang.String> getResourcePaths(java.lang.String path)

Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument. Paths indicating subdirectory paths end with a '/'. The returned paths are all relative to the root of the web application and have a leading '/'. For example, for a web application containing

/welcome.html
/catalog/index.html
/catalog/products.html
/catalog/offers/books.html
/catalog/offers/music.html
/customer/login.jsp
/WEB-INF/web.xml
/WEB-INF/classes/com.acme.OrderServlet.class,

getResourcePaths("/") returns {"/welcome.html", "/catalog/", "/customer/", "/WEB-INF/"}
getResourcePaths("/catalog/") returns {"/catalog/index.html", "/catalog/products.html", "/catalog/offers/"}.

getInitParameter

java.lang.String getInitParameter(java.lang.String name)

Returns the value of the named context-wide initialization parameter, or null if the parameter does not exist.

getInitParameterNames

java.lang.Iterable<java.lang.String> getInitParameterNames()

Returns the names of the context's initialization parameters as an iterable String objects (never null).

Since:

6.0.0

getUpdateURI

java.lang.String getUpdateURI()

Returns the URI for asynchronous update.

Both getUpdateURI() and Desktop.getUpdateURI(java.lang.String) are encoded with Execution.encodeURL(java.lang.String)

Throws:

java.lang.NullPointerException - if the current execution is not available

Since:

3.6.2

See Also:

Desktop.getUpdateURI(java.lang.String)

getUpdateURI

java.lang.String getUpdateURI(boolean encode)

Returns the URI for asynchronous update that can be encoded or not.

Parameters:

encode - whether to encode with Execution.encodeURL(java.lang.String). It is the same as getUpdateURI() if encode is true.

Throws:

java.lang.NullPointerException - if the current execution is not available and encode is true.

Since:

5.0.0

getConfiguration

Configuration getConfiguration()

Returns the configuration.

getNativeContext

java.lang.Object getNativeContext()

Deprecated. As of release 6.0.0, replaced with getServletContext().

getServletContext

javax.servlet.ServletContext getServletContext()

Returns the servlet context of this application.

Since:

6.0.0

log

void log(java.lang.String msg)

Writes the specified message to a servlet log file, usually an event log. The name and type of the servlet log file is specific to the servlet container.

Since:

6.0.0

log

void log(java.lang.String msg,
         java.lang.Throwable ex)

Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file. The name and type of the servlet log file is specific to the servlet container, usually an event log.

Since:

6.0.0