Functions (Jenkins core 2.199 API)

java.lang.Object
- hudson.Functions

```
public class Functions
extends Object
```
Utility functions used in views.
An instance of this class is created for each request and made accessible from view pages via the variable 'h' (h stands for Hudson.)

Author:

Kohsuke Kawaguchi

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class Functions.RunUrl
URL decomposed for easier computation of relevant URLs.

static class Functions.ThreadGroupMap

Nested Classes
Modifier and Type	Class and Description
`static class`	`Functions.RunUrl` URL decomposed for easier computation of relevant URLs.
`static class`	`Functions.ThreadGroupMap`

Field Summary

Fields
Modifier and Type Field and Description

static boolean DEBUG_YUI
Set to true if you need to use the debug version of YUI.

Fields
Modifier and Type	Field and Description
`static boolean`	`DEBUG_YUI` Set to true if you need to use the debug version of YUI.

Constructor Summary

Constructors
Constructor and Description

Functions()

Constructors
Constructor and Description
`Functions()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`static String`	`addSuffix(int n, String singular, String plural)` Adds the proper suffix.
`static void`	`adminCheck(org.kohsuke.stapler.StaplerRequest req, org.kohsuke.stapler.StaplerResponse rsp, Object required, Permission permission)`
`static void`	`advertiseHeaders(javax.servlet.http.HttpServletResponse rsp)` Advertises the minimum set of HTTP headers that assist programmatic discovery of Jenkins.
`static String`	`appendIfNotNull(String text, String suffix, String nullText)`
`static String`	`appendSpaceIfNotNull(String n)`
`static String`	`breakableString(String plain)` Get a string that can be safely broken to several lines when necessary.
`void`	`calcCheckUrl(Map attributes, String userDefined, Object descriptor, String field)` Determines the parameters that client-side needs for a form validation check.
`static String`	`capitalize(String s)` Converts "abc" to "Abc".
`static void`	`checkPermission(AccessControlled object, Permission permission)`
`static void`	`checkPermission(Object object, Permission permission)` This version is so that the 'checkPermission' on `layout.jelly` degrades gracefully if "it" is not an `AccessControlled` object.
`static void`	`checkPermission(Permission permission)`
`static void`	`configureAutoRefresh(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, boolean noAutoRefresh)` Used by `layout.jelly` to control the auto refresh behavior.
`static String`	`createRenderOnDemandProxy(org.apache.commons.jelly.JellyContext context, String attributesToCapture)`
`static Functions.RunUrl`	`decompose(org.kohsuke.stapler.StaplerRequest req)`
`static <T> T`	`defaulted(T value, T defaultValue)` If the value exists, return that value.
`static boolean`	`defaultToTrue(Boolean b)` Can be used to check a checkbox by default.
`static int`	`determineRows(String s)` Counts the number of rows needed for textarea to fit the content.
`static Map<Thread,StackTraceElement[]>`	`dumpAllThreads()`
`static String`	`dumpThreadInfo(ThreadInfo ti, Functions.ThreadGroupMap map)`
`static <T> Collection<T>`	`emptyList()`
`static String`	`encode(String s)`
`static String`	`escape(String s)`
`static <V> SortedMap<Integer,V>`	`filter(SortedMap<Integer,V> map, String from, String to)` Creates a sub map by using the given range (both ends inclusive).
`List`	`filterDescriptors(Object context, Iterable descriptors)`
`static <V> SortedMap<Integer,V>`	`filterExcludingFrom(SortedMap<Integer,V> map, String from, String to)` Creates a sub map by using the given range (upper end inclusive).
`static String`	`generateConsoleAnnotationScriptAndStylesheet()` Generate a series of `<script>` tags to include `script.js` from `ConsoleAnnotatorFactory`s and `ConsoleAnnotationDescriptor`s.
`String`	`generateId()` Generates an unique ID.
`static String`	`getActionUrl(String itUrl, Action action)` Computes the hyperlink to actions, to handle the situation when the `Action.getUrlName()` returns absolute URL.
`static List<TopLevelItem>`	`getAllTopLevelItems(ItemGroup root)` Gets all the `TopLevelItem`s recursively in the `ItemGroup` tree.
`static List<Descriptor<AuthorizationStrategy>>`	`getAuthorizationStrategyDescriptors()`
`static String`	`getAvatar(User user, String avatarSize)` Returns an avatar image URL for the specified user and preferred image size
`static List<Descriptor<Builder>>`	`getBuilderDescriptors(AbstractProject<?,?> project)`
`static List<Descriptor<BuildWrapper>>`	`getBuildWrapperDescriptors(AbstractProject<?,?> project)`
`static List<Descriptor<CaptchaSupport>>`	`getCaptchaSupportDescriptors()`
`String`	`getCheckUrl(String userDefined, Object descriptor, String field)` Deprecated. Use `calcCheckUrl(java.util.Map, java.lang.String, java.lang.Object, java.lang.String)`
`static ArrayList<CLICommand>`	`getCLICommands()`
`static List<Descriptor<Cloud>>`	`getCloudDescriptors()`
`static List<Descriptor<ComputerLauncher>>`	`getComputerLauncherDescriptors()` Deprecated. replaced by `Slave.SlaveDescriptor#computerLauncherDescriptors(Slave)`
`static javax.servlet.http.Cookie`	`getCookie(javax.servlet.http.HttpServletRequest req, String name)`
`static String`	`getCookie(javax.servlet.http.HttpServletRequest req, String name, String defaultValue)`
`static String`	`getCrumb(org.kohsuke.stapler.StaplerRequest req)`
`static List<Descriptor<CrumbIssuer>>`	`getCrumbIssuerDescriptors()`
`static String`	`getCrumbRequestField()`
`static String`	`getCurrentDescriptorByNameUrl()`
`static org.apache.commons.jelly.JellyContext`	`getCurrentJellyContext()` When called from within JEXL expression evaluation, this method returns the current `JellyContext` used to evaluate the script.
`static Locale`	`getCurrentLocale()`
`static Date`	`getCurrentTime()`
`static String`	`getDiffString(int i)` Prints the integer as a string that represents difference, like "-5", "+/-0", "+3".
`static String`	`getDiffString2(int i)` `getDiffString(int)` that doesn't show anything for +/-0
`static String`	`getDiffString2(String prefix, int i, String suffix)` `getDiffString2(int)` that puts the result into prefix and suffix if there's something to print
`static Map`	`getEnvVars()`
`static String`	`getFooterURL()` Returns the link to be displayed in the footer of the UI.
`static List<NodePropertyDescriptor>`	`getGlobalNodePropertyDescriptors()` Returns those node properties which can be configured as global node properties.
`static String`	`getIconFilePath(Action a)` Computes the path to the icon of the given action from the context path.
`static boolean`	`getIsUnitTest()` Returns true if we are running unit tests.
`JDK.DescriptorImpl`	`getJDKDescriptor()`
`static List<JobPropertyDescriptor>`	`getJobPropertyDescriptors(Class<? extends Job> clazz)`
`static List<JobPropertyDescriptor>`	`getJobPropertyDescriptors(Job job)`
`List<String>`	`getLoggerNames()` Work around for bug 6935026.
`static List<LogRecord>`	`getLogRecords()`
`static List<Descriptor<MyViewsTabBar>>`	`getMyViewsTabBarDescriptors()`
`static String`	`getNearestAncestorUrl(org.kohsuke.stapler.StaplerRequest req, Object it)` Finds the given object in the ancestor list and returns its URL.
`static Node.Mode[]`	`getNodeModes()`
`static List<NodePropertyDescriptor>`	`getNodePropertyDescriptors(Class<? extends Node> clazz)` Deprecated. replaced by `Slave.SlaveDescriptor#nodePropertyDescriptors(Slave)`
`static List<PageDecorator>`	`getPageDecorators()` Gets all the `PageDecorator`s.
`static List<ParameterDefinition.ParameterDescriptor>`	`getParameterDescriptors()`
`String`	`getPasswordValue(Object o)` Used by `<f:password/>` so that we send an encrypted value to the client.
`static String`	`getProjectListString(List<AbstractProject> projects)`
`static List<Descriptor<Publisher>>`	`getPublisherDescriptors(AbstractProject<?,?> project)`
`static String`	`getRelativeDisplayNameFrom(Item p, ItemGroup g)` Gets the relative display name to the given item from the specified group.
`static String`	`getRelativeLinkTo(Item p)` Computes the relative path from the current page to the given item.
`static String`	`getRelativeNameFrom(Item p, ItemGroup g)` Gets the name to the given item relative to given group.
`static String`	`getRelativeNameFrom(Item p, ItemGroup g, boolean useDisplayName)` Gets the relative name or display name to the given item from the specified group.
`static List<String>`	`getRequestHeaders(String name)`
`static String`	`getResourcePath()` Resource path prefix.
`static List<Descriptor<RetentionStrategy<?>>>`	`getRetentionStrategyDescriptors()` Deprecated. replaced by `Slave.SlaveDescriptor#retentionStrategyDescriptors(Slave)`
`static List<SCMDescriptor<?>>`	`getSCMDescriptors(AbstractProject<?,?> project)`
`static Area`	`getScreenResolution()` If we know the user's screen resolution, return it.
`static String`	`getSearchURL()` Finds the inner-most `SearchableModelObject` in scope.
`static List<Descriptor<SecurityRealm>>`	`getSecurityRealmDescriptors()`
`String`	`getServerName()` Obtains the host name of the Hudson server that clients can use to talk back to.
`static SimplePageDecorator`	`getSimplePageDecorator()` Gets only one `SimplePageDecorator`.
`static List<SimplePageDecorator>`	`getSimplePageDecorators()`
`static Collection<Descriptor>`	`getSortedDescriptorsForGlobalConfig()` Like `getSortedDescriptorsForGlobalConfig(Predicate)` but with a constant truth predicate, to include all descriptors.
`static Collection<Descriptor>`	`getSortedDescriptorsForGlobalConfig(com.google.common.base.Predicate<GlobalConfigurationCategory> predicate)` Gets all the descriptors sorted by their inheritance tree of `Describable` so that descriptors of similar types come nearby.
`static Collection<Descriptor>`	`getSortedDescriptorsForGlobalConfigNoSecurity()` Deprecated. This is rather meaningless.
`static Collection<Descriptor>`	`getSortedDescriptorsForGlobalConfigUnclassified()` Like `getSortedDescriptorsForGlobalConfig(Predicate)` but for unclassified descriptors only.
`static Map`	`getSystemProperties()`
`static String`	`getSystemProperty(String key)` Gets the system property indicated by the specified key.
`static ThreadInfo[]`	`getThreadInfos()`
`static <B> Class`	`getTypeParameter(Class<? extends B> c, Class<B> base, int n)` Given `c=MyList (extends ArrayList<Foo>), base=List`, compute the parameterization of 'base' that's assignable from 'c' (in this case `List<Foo>`), and return its n-th type parameter (n=0 would return `Foo`).
`String`	`getUserAvatar(User user, String avatarSize)` Deprecated. as of 1.451 Use `getAvatar(hudson.model.User, java.lang.String)`
`static String`	`getVersion()`
`static String`	`getViewResource(Object it, String path)`
`static List<Descriptor<ViewsTabBar>>`	`getViewsTabBarDescriptors()`
`static String`	`getWin32ErrorMessage(IOException e)`
`static String`	`getYuiSuffix()` Gets the suffix to use for YUI JavaScript.
`static boolean`	`hasPermission(Object object, Permission permission)` This version is so that the 'hasPermission' can degrade gracefully if "it" is not an `AccessControlled` object.
`static boolean`	`hasPermission(Permission permission)` Returns true if the current user has the given permission.
`static boolean`	`hasView(Object it, String path)`
`static String`	`htmlAttributeEscape(String text)`
`static String`	`humanReadableByteSize(long size)` Returns human readable information about file size
`boolean`	`hyperlinkMatchesCurrentPage(String href)` If the given href link is matching the current page, return true.
`static Object`	`ifThenElse(boolean cond, Object thenValue, Object elseValue)` Deprecated. as of 1.294 JEXL now supports the real ternary operator "x?y:z", so this work around is no longer necessary.
`static String`	`inferHudsonURL(org.kohsuke.stapler.StaplerRequest req)` Infers the hudson installation URL from the given request.
`static void`	`initPageVariables(org.apache.commons.jelly.JellyContext context)`
`static boolean`	`isAnonymous()` Checks if the current user is anonymous.
`static boolean`	`isArtifactsPermissionEnabled()` Returns `true` if the `Run.ARTIFACTS` permission is enabled, `false` otherwise.
`static boolean`	`isAutoRefresh(javax.servlet.http.HttpServletRequest request)`
`static boolean`	`isCollapsed(String paneId)`
`static boolean`	`isContextMenuVisible(Action a)`
`static boolean`	`isExtensionsAvailable()` During Jenkins start-up, before `InitMilestone.PLUGINS_STARTED` the extensions lists will be empty and they are not guaranteed to be fully populated until after `InitMilestone.EXTENSIONS_AUGMENTED`, similarly, during termination after `Jenkins.isTerminating()` is set, it is no longer safe to access the extensions lists.
`static boolean`	`isGlibcSupported()`
`static boolean`	`isMatrixProject(Object o)` Deprecated.
`static boolean`	`isModel(Object o)`
`static boolean`	`isModelWithChildren(Object o)`
`static boolean`	`isModelWithContextMenu(Object o)`
`static boolean`	`isMultiline(String s)`
`static boolean`	`isMustangOrAbove()` Deprecated. Now always true.
`static boolean`	`isWindows()`
`static boolean`	`isWipeOutPermissionEnabled()` Returns `true` if the `Item.WIPEOUT` permission is enabled, `false` otherwise.
`static String`	`joinPath(String... components)` Combine path components via '/' while handling leading/trailing '/' to avoid duplicates.
`static String`	`jsStringEscape(String s)`
`static String`	`nbspIndent(String size)` One nbsp per 10 pixels in given size, which may be a plain number or "NxN" (like an iconSize).
`String`	`prepend(String prefix, String body)` Prepend a prefix only when there's the specified body.
`static String`	`printLogRecord(LogRecord r)`
`static String[]`	`printLogRecordHtml(LogRecord r, LogRecord prior)`
`static void`	`printStackTrace(Throwable t, PrintStream ps)` Like `Throwable.printStackTrace(PrintStream)` but using `printThrowable(java.lang.Throwable)` format.
`static void`	`printStackTrace(Throwable t, PrintWriter pw)` Like `Throwable.printStackTrace(PrintWriter)` but using `printThrowable(java.lang.Throwable)` format.
`static String`	`printThrowable(Throwable t)` Prints a stack trace from an exception into a readable form.
`static Object`	`rawHtml(Object o)` Used for arguments to internationalized expressions to avoid escape
`static void`	`restoreCurrentDescriptorByNameUrl(String old)`
`static <T> Iterable<T>`	`reverse(Collection<T> collection)` Reverses a collection so that it can be easily walked in reverse order.
`static String`	`rfc822Date(Calendar cal)`
`static String`	`runScript(org.apache.commons.jelly.Script script)` Evaluate a Jelly script and return output as a String.
`static String`	`setCurrentDescriptorByNameUrl(String value)`
`<T> List<T>`	`singletonList(T t)`
`static int`	`size2(Object o)` Works like JSTL build-in size(x) function, but handle null gracefully.
`static Functions.ThreadGroupMap`	`sortThreadsAndGetGroupMap(ThreadInfo[] list)`
`static <T> List<T>`	`subList(List<T> base, int maxSize)` Returns a sub-list if the given list is bigger than the specified `maxSize`.
`static String`	`toCCStatus(Item i)` Deprecated. This functionality has been moved to ccxml plugin.
`static String`	`toEmailSafeString(String projectName)` Escapes the character unsafe for e-mail address.
`static String`	`validateIconSize(String iconSize)`
`static String`	`xmlEscape(String s)`
`static String`	`xmlUnescape(String s)`
`static String`	`xsDate(Calendar cal)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- DEBUG_YUI
```
public static boolean DEBUG_YUI
```
  Set to true if you need to use the debug version of YUI.

Constructor Detail
- Functions
```
public Functions()
```

Method Detail

generateId
```
public String generateId()
```
Generates an unique ID.

isModel

public static boolean isModel(Object o)

isModelWithContextMenu

public static boolean isModelWithContextMenu(Object o)

isModelWithChildren

public static boolean isModelWithChildren(Object o)

isMatrixProject

@Deprecated
public static boolean isMatrixProject(Object o)

Deprecated.

xsDate

public static String xsDate(Calendar cal)

rfc822Date

public static String rfc822Date(Calendar cal)

isExtensionsAvailable
```
public static boolean isExtensionsAvailable()
```
During Jenkins start-up, before InitMilestone.PLUGINS_STARTED the extensions lists will be empty and they are not guaranteed to be fully populated until after InitMilestone.EXTENSIONS_AUGMENTED, similarly, during termination after Jenkins.isTerminating() is set, it is no longer safe to access the extensions lists. If you attempt to access the extensions list from a UI thread while the extensions are being loaded you will hit a big honking great monitor lock that will block until the effective extension list has been determined (as if a plugin fails to start, all of the failed plugin's extensions and any dependent plugins' extensions will have to be evicted from the list of extensions. In practical terms this only affects the "Jenkins is loading" screen, but as that screen uses the generic layouts we provide this utility method so that the generic layouts can avoid iterating extension lists while Jenkins is starting up. If you attempt to access the extensions list from a UI thread while Jenkins is being shut down, the extensions themselves may no longer be in a valid state and could attempt to revive themselves and block termination. In actual terms the termination only affects those views required to render HudsonIsRestarting's index.jelly which is the same set as the HudsonIsLoading pages so it makes sense to use both checks here.

Returns:

true if the extensions lists have been populated.

Since:

1.607

initPageVariables

public static void initPageVariables(org.apache.commons.jelly.JellyContext context)

getTypeParameter
```
public static <B> Class getTypeParameter(Class<? extends B> c,
                                         Class<B> base,
                                         int n)
```
Given c=MyList (extends ArrayList<Foo>), base=List, compute the parameterization of 'base' that's assignable from 'c' (in this case List<Foo>), and return its n-th type parameter (n=0 would return Foo).
This method is useful for doing type arithmetic.

Throws:

AssertionError - if c' is not parameterized.

getJDKDescriptor

public JDK.DescriptorImpl getJDKDescriptor()

getDiffString
```
public static String getDiffString(int i)
```
Prints the integer as a string that represents difference, like "-5", "+/-0", "+3".

getDiffString2
```
public static String getDiffString2(int i)
```
getDiffString(int) that doesn't show anything for +/-0

getDiffString2

public static String getDiffString2(String prefix,
                                    int i,
                                    String suffix)

getDiffString2(int) that puts the result into prefix and suffix if there's something to print

addSuffix

public static String addSuffix(int n,
                               String singular,
                               String plural)

Adds the proper suffix.

decompose

public static Functions.RunUrl decompose(org.kohsuke.stapler.StaplerRequest req)

getScreenResolution
```
public static Area getScreenResolution()
```
If we know the user's screen resolution, return it. Otherwise null.

Since:

1.213

getNodeModes

public static Node.Mode[] getNodeModes()

getProjectListString

public static String getProjectListString(List<AbstractProject> projects)

ifThenElse

@Deprecated
public static Object ifThenElse(boolean cond,
                                            Object thenValue,
                                            Object elseValue)

Deprecated. as of 1.294 JEXL now supports the real ternary operator "x?y:z", so this work around is no longer necessary.

appendIfNotNull

public static String appendIfNotNull(String text,
                                     String suffix,
                                     String nullText)

getSystemProperties

public static Map getSystemProperties()

getSystemProperty
```
@Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
public static String getSystemProperty(String key)
```
Gets the system property indicated by the specified key. Delegates to SystemProperties.getString(java.lang.String).

getEnvVars
```
public static Map getEnvVars()
```

isWindows
```
public static boolean isWindows()
```

isGlibcSupported

public static boolean isGlibcSupported()

getLogRecords

public static List<LogRecord> getLogRecords()

printLogRecord

public static String printLogRecord(LogRecord r)

printLogRecordHtml

@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
public static String[] printLogRecordHtml(LogRecord r,
                                                                                                                 LogRecord prior)

reverse
```
public static <T> Iterable<T> reverse(Collection<T> collection)
```
Reverses a collection so that it can be easily walked in reverse order.

Since:

1.525

getCookie

public static javax.servlet.http.Cookie getCookie(javax.servlet.http.HttpServletRequest req,
                                                  String name)

getCookie

public static String getCookie(javax.servlet.http.HttpServletRequest req,
                               String name,
                               String defaultValue)

validateIconSize

@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
public static String validateIconSize(String iconSize)
                                                                                                      throws SecurityException

Throws:: SecurityException

getYuiSuffix
```
public static String getYuiSuffix()
```
Gets the suffix to use for YUI JavaScript.

filter

public static <V> SortedMap<Integer,V> filter(SortedMap<Integer,V> map,
                                              String from,
                                              String to)

Creates a sub map by using the given range (both ends inclusive).

filterExcludingFrom

@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
public static <V> SortedMap<Integer,V> filterExcludingFrom(SortedMap<Integer,V> map,
                                                                                                                                  String from,
                                                                                                                                  String to)

Creates a sub map by using the given range (upper end inclusive).

configureAutoRefresh

public static void configureAutoRefresh(javax.servlet.http.HttpServletRequest request,
                                        javax.servlet.http.HttpServletResponse response,
                                        boolean noAutoRefresh)

Used by layout.jelly to control the auto refresh behavior.

Parameters:: noAutoRefresh - On certain pages, like a page with forms, will have annoying interference with auto refresh. On those pages, disable auto-refresh.

isAutoRefresh

public static boolean isAutoRefresh(javax.servlet.http.HttpServletRequest request)

isCollapsed

public static boolean isCollapsed(String paneId)

getNearestAncestorUrl
```
public static String getNearestAncestorUrl(org.kohsuke.stapler.StaplerRequest req,
                                           Object it)
```
Finds the given object in the ancestor list and returns its URL. This is used to determine the "current" URL assigned to the given object, so that one can compute relative URLs from it.

getSearchURL
```
public static String getSearchURL()
```
Finds the inner-most SearchableModelObject in scope.

appendSpaceIfNotNull

public static String appendSpaceIfNotNull(String n)

nbspIndent
```
public static String nbspIndent(String size)
```
One nbsp per 10 pixels in given size, which may be a plain number or "NxN" (like an iconSize). Useful in a sortable table heading.

getWin32ErrorMessage

public static String getWin32ErrorMessage(IOException e)

isMultiline

public static boolean isMultiline(String s)

encode

public static String encode(String s)

escape

public static String escape(String s)

xmlEscape

public static String xmlEscape(String s)

xmlUnescape

public static String xmlUnescape(String s)

htmlAttributeEscape

public static String htmlAttributeEscape(String text)

checkPermission

public static void checkPermission(Permission permission)
                            throws IOException,
                                   javax.servlet.ServletException

Throws:: IOException; javax.servlet.ServletException

checkPermission

public static void checkPermission(AccessControlled object,
                                   Permission permission)
                            throws IOException,
                                   javax.servlet.ServletException

Throws:: IOException; javax.servlet.ServletException

checkPermission

public static void checkPermission(Object object,
                                   Permission permission)
                            throws IOException,
                                   javax.servlet.ServletException

This version is so that the 'checkPermission' on layout.jelly degrades gracefully if "it" is not an AccessControlled object. Otherwise it will perform no check and that problem is hard to notice.

Throws:: IOException; javax.servlet.ServletException

hasPermission
```
public static boolean hasPermission(Permission permission)
                             throws IOException,
                                    javax.servlet.ServletException
```
Returns true if the current user has the given permission.

Parameters:

permission - If null, returns true. This defaulting is convenient in making the use of this method terse.

Throws:

IOException

javax.servlet.ServletException

hasPermission

public static boolean hasPermission(Object object,
                                    Permission permission)
                             throws IOException,
                                    javax.servlet.ServletException

This version is so that the 'hasPermission' can degrade gracefully if "it" is not an AccessControlled object.

Throws:: IOException; javax.servlet.ServletException

adminCheck

public static void adminCheck(org.kohsuke.stapler.StaplerRequest req,
                              org.kohsuke.stapler.StaplerResponse rsp,
                              Object required,
                              Permission permission)
                       throws IOException,
                              javax.servlet.ServletException

Throws:: IOException; javax.servlet.ServletException

inferHudsonURL

public static String inferHudsonURL(org.kohsuke.stapler.StaplerRequest req)

Infers the hudson installation URL from the given request.

getFooterURL
```
public static String getFooterURL()
```
Returns the link to be displayed in the footer of the UI.

getJobPropertyDescriptors

public static List<JobPropertyDescriptor> getJobPropertyDescriptors(Class<? extends Job> clazz)

getJobPropertyDescriptors

public static List<JobPropertyDescriptor> getJobPropertyDescriptors(Job job)

getBuildWrapperDescriptors

public static List<Descriptor<BuildWrapper>> getBuildWrapperDescriptors(AbstractProject<?,?> project)

getSecurityRealmDescriptors

public static List<Descriptor<SecurityRealm>> getSecurityRealmDescriptors()

getAuthorizationStrategyDescriptors

public static List<Descriptor<AuthorizationStrategy>> getAuthorizationStrategyDescriptors()

getBuilderDescriptors

public static List<Descriptor<Builder>> getBuilderDescriptors(AbstractProject<?,?> project)

getPublisherDescriptors

public static List<Descriptor<Publisher>> getPublisherDescriptors(AbstractProject<?,?> project)

getSCMDescriptors

public static List<SCMDescriptor<?>> getSCMDescriptors(AbstractProject<?,?> project)

getComputerLauncherDescriptors

@Deprecated
 @Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
 @RestrictedSince(value="2.12")
public static List<Descriptor<ComputerLauncher>> getComputerLauncherDescriptors()

Deprecated. replaced by Slave.SlaveDescriptor#computerLauncherDescriptors(Slave)

Since:: 2.12

getRetentionStrategyDescriptors

@Deprecated
 @Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
 @RestrictedSince(value="2.12")
public static List<Descriptor<RetentionStrategy<?>>> getRetentionStrategyDescriptors()

Deprecated. replaced by Slave.SlaveDescriptor#retentionStrategyDescriptors(Slave)

Since:: 2.12

getParameterDescriptors

public static List<ParameterDefinition.ParameterDescriptor> getParameterDescriptors()

getCaptchaSupportDescriptors

public static List<Descriptor<CaptchaSupport>> getCaptchaSupportDescriptors()

getViewsTabBarDescriptors

public static List<Descriptor<ViewsTabBar>> getViewsTabBarDescriptors()

getMyViewsTabBarDescriptors

public static List<Descriptor<MyViewsTabBar>> getMyViewsTabBarDescriptors()

getNodePropertyDescriptors

@Deprecated
 @Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
 @RestrictedSince(value="2.12")
public static List<NodePropertyDescriptor> getNodePropertyDescriptors(Class<? extends Node> clazz)

Deprecated. replaced by Slave.SlaveDescriptor#nodePropertyDescriptors(Slave)

Since:: 2.12

getGlobalNodePropertyDescriptors
```
public static List<NodePropertyDescriptor> getGlobalNodePropertyDescriptors()
```
Returns those node properties which can be configured as global node properties.

Since:

1.520

getSortedDescriptorsForGlobalConfig
```
public static Collection<Descriptor> getSortedDescriptorsForGlobalConfig(com.google.common.base.Predicate<GlobalConfigurationCategory> predicate)
```
Gets all the descriptors sorted by their inheritance tree of Describable so that descriptors of similar types come nearby.
We sort them by Extension.ordinal() but only for GlobalConfigurations, as the value is normally used to compare similar kinds of extensions, and we needed GlobalConfigurations to be able to position themselves in a layer above. This however creates some asymmetry between regular Descriptors and GlobalConfigurations. Perhaps it is better to introduce another annotation element? But then, extensions shouldn't normally concern themselves about ordering too much, and the only reason we needed this for GlobalConfigurations are for backward compatibility.

Parameters:

predicate - Filter the descriptors based on GlobalConfigurationCategory

Since:

1.494

getSortedDescriptorsForGlobalConfig
```
public static Collection<Descriptor> getSortedDescriptorsForGlobalConfig()
```
Like getSortedDescriptorsForGlobalConfig(Predicate) but with a constant truth predicate, to include all descriptors.

getSortedDescriptorsForGlobalConfigNoSecurity

@Deprecated
public static Collection<Descriptor> getSortedDescriptorsForGlobalConfigNoSecurity()

Deprecated. This is rather meaningless.

getSortedDescriptorsForGlobalConfigUnclassified
```
public static Collection<Descriptor> getSortedDescriptorsForGlobalConfigUnclassified()
```
Like getSortedDescriptorsForGlobalConfig(Predicate) but for unclassified descriptors only.

Since:

1.506

getIconFilePath
```
public static String getIconFilePath(Action a)
```
Computes the path to the icon of the given action from the context path.

size2
```
public static int size2(Object o)
                 throws Exception
```
Works like JSTL build-in size(x) function, but handle null gracefully.

Throws:

Exception

getRelativeLinkTo
```
public static String getRelativeLinkTo(Item p)
```
Computes the relative path from the current page to the given item.

getAllTopLevelItems
```
public static List<TopLevelItem> getAllTopLevelItems(ItemGroup root)
```
Gets all the TopLevelItems recursively in the ItemGroup tree.

Since:

1.512

getRelativeNameFrom
```
@Nullable
public static String getRelativeNameFrom(@CheckForNull
                                                   Item p,
                                                   @CheckForNull
                                                   ItemGroup g,
                                                   boolean useDisplayName)
```
Gets the relative name or display name to the given item from the specified group.

Parameters:

p - the Item we want the relative display name. If null, a null will be returned by the method

g - the ItemGroup used as point of reference for the item. If the group is not specified, item's path will be used.

useDisplayName - if true, returns a display name, otherwise returns a name

Returns:

String like "foo » bar". null if item is null or if one of its parents is not an Item.

Since:

1.515

getRelativeNameFrom

@Nullable
public static String getRelativeNameFrom(@CheckForNull
                                                   Item p,
                                                   @CheckForNull
                                                   ItemGroup g)

Gets the name to the given item relative to given group.

Parameters:: p - the Item we want the relative display name If null, the method will immediately return null.; g - the ItemGroup used as point of reference for the item
Returns:: String like "foo/bar". null if the item is null or if one of its parents is not an Item.
Since:: 1.515

getRelativeDisplayNameFrom

@Nullable
public static String getRelativeDisplayNameFrom(@CheckForNull
                                                          Item p,
                                                          @CheckForNull
                                                          ItemGroup g)

Gets the relative display name to the given item from the specified group.

Parameters:: p - the Item we want the relative display name. If null, the method will immediately return null.; g - the ItemGroup used as point of reference for the item
Returns:: String like "Foo » Bar". null if the item is null or if one of its parents is not an Item.
Since:: 1.512

dumpAllThreads

public static Map<Thread,StackTraceElement[]> dumpAllThreads()

getThreadInfos

public static ThreadInfo[] getThreadInfos()

sortThreadsAndGetGroupMap

public static Functions.ThreadGroupMap sortThreadsAndGetGroupMap(ThreadInfo[] list)

isMustangOrAbove

@Deprecated
public static boolean isMustangOrAbove()

Deprecated. Now always true.

dumpThreadInfo

public static String dumpThreadInfo(ThreadInfo ti,
                                    Functions.ThreadGroupMap map)

emptyList

public static <T> Collection<T> emptyList()

jsStringEscape

public static String jsStringEscape(String s)

capitalize

public static String capitalize(String s)

Converts "abc" to "Abc".

getVersion
```
public static String getVersion()
```

getResourcePath

public static String getResourcePath()

Resource path prefix.

getViewResource

public static String getViewResource(Object it,
                                     String path)

hasView

public static boolean hasView(Object it,
                              String path)
                       throws IOException

Throws:: IOException

defaultToTrue
```
public static boolean defaultToTrue(Boolean b)
```
Can be used to check a checkbox by default. Used from views like h.defaultToTrue(scm.useUpdate). The expression will evaluate to true if scm is null.

defaulted
```
public static <T> T defaulted(T value,
                              T defaultValue)
```
If the value exists, return that value. Otherwise return the default value.
Starting 1.294, JEXL supports the elvis operator "x?:y" that supersedes this.

Since:

1.150

printThrowable
```
@Nonnull
public static String printThrowable(@CheckForNull
                                             Throwable t)
```
Prints a stack trace from an exception into a readable form. Unlike Throwable.printStackTrace(PrintWriter), this implementation follows the suggestion of JDK-6507809 to produce a linear trace even when Throwable.getCause() is used.

Parameters:

t - Input Throwable

Returns:

If t is not null, generally a multiline string ending in a (platform-specific) newline; otherwise, the method returns a default "No exception details" string.

printStackTrace

public static void printStackTrace(@CheckForNull
                                   Throwable t,
                                   @Nonnull
                                   PrintWriter pw)

Like Throwable.printStackTrace(PrintWriter) but using printThrowable(java.lang.Throwable) format.

Parameters:: t - an exception to print; pw - the log
Since:: 2.43

printStackTrace

public static void printStackTrace(@CheckForNull
                                   Throwable t,
                                   @Nonnull
                                   PrintStream ps)

Like Throwable.printStackTrace(PrintStream) but using printThrowable(java.lang.Throwable) format.

Parameters:: t - an exception to print; ps - the log
Since:: 2.43

determineRows
```
public static int determineRows(String s)
```
Counts the number of rows needed for textarea to fit the content. Minimum 5 rows.

toCCStatus
```
@Deprecated
 @Restricted(value=org.kohsuke.accmod.restrictions.DoNotUse.class)
 @RestrictedSince(value="since TODO")
public static String toCCStatus(Item i)
```
Deprecated. This functionality has been moved to ccxml plugin.

Converts the Hudson build status to CruiseControl build status, which is either Success, Failure, Exception, or Unknown.

isAnonymous
```
public static boolean isAnonymous()
```
Checks if the current user is anonymous.

getCurrentJellyContext
```
public static org.apache.commons.jelly.JellyContext getCurrentJellyContext()
```
When called from within JEXL expression evaluation, this method returns the current JellyContext used to evaluate the script.

Since:

1.164

runScript

public static String runScript(org.apache.commons.jelly.Script script)
                        throws org.apache.commons.jelly.JellyTagException

Evaluate a Jelly script and return output as a String.

Throws:: org.apache.commons.jelly.JellyTagException
Since:: 1.267

subList
```
public static <T> List<T> subList(List<T> base,
                                  int maxSize)
```
Returns a sub-list if the given list is bigger than the specified maxSize. Warning: do not call this with a RunList, or you will break lazy loading!

joinPath
```
public static String joinPath(String... components)
```
Combine path components via '/' while handling leading/trailing '/' to avoid duplicates.

getActionUrl
```
@CheckForNull
public static String getActionUrl(String itUrl,
                                                Action action)
```
Computes the hyperlink to actions, to handle the situation when the Action.getUrlName() returns absolute URL.

Returns:

null in case the action should not be presented to the user.

toEmailSafeString
```
public static String toEmailSafeString(String projectName)
```
Escapes the character unsafe for e-mail address. See http://en.wikipedia.org/wiki/E-mail_address for the details, but here the vocabulary is even more restricted.

getServerName
```
public String getServerName()
```
Obtains the host name of the Hudson server that clients can use to talk back to.
This is primarily used in slave-agent.jnlp.jelly to specify the destination that the agents talk to.

getCheckUrl

@Deprecated
public String getCheckUrl(String userDefined,
                                      Object descriptor,
                                      String field)

Deprecated. Use calcCheckUrl(java.util.Map, java.lang.String, java.lang.Object, java.lang.String)

Determines the form validation check URL. See textbox.jelly

calcCheckUrl

public void calcCheckUrl(Map attributes,
                         String userDefined,
                         Object descriptor,
                         String field)

Determines the parameters that client-side needs for a form validation check. See prepareDatabinding.jelly

Since:: 1.528

hyperlinkMatchesCurrentPage
```
public boolean hyperlinkMatchesCurrentPage(String href)
                                    throws UnsupportedEncodingException
```
If the given href link is matching the current page, return true. Used in task.jelly to decide if the page should be highlighted.

Throws:

UnsupportedEncodingException

singletonList

public <T> List<T> singletonList(T t)

getPageDecorators

public static List<PageDecorator> getPageDecorators()

Gets all the PageDecorators.

getSimplePageDecorator
```
public static SimplePageDecorator getSimplePageDecorator()
```
Gets only one SimplePageDecorator.

Since:

2.128

getSimplePageDecorators

public static List<SimplePageDecorator> getSimplePageDecorators()

getCloudDescriptors

public static List<Descriptor<Cloud>> getCloudDescriptors()

prepend

public String prepend(String prefix,
                      String body)

Prepend a prefix only when there's the specified body.

getCrumbIssuerDescriptors

public static List<Descriptor<CrumbIssuer>> getCrumbIssuerDescriptors()

getCrumb

public static String getCrumb(org.kohsuke.stapler.StaplerRequest req)

getCrumbRequestField

public static String getCrumbRequestField()

getCurrentTime
```
public static Date getCurrentTime()
```

getCurrentLocale

public static Locale getCurrentLocale()

generateConsoleAnnotationScriptAndStylesheet
```
public static String generateConsoleAnnotationScriptAndStylesheet()
```
Generate a series of <script> tags to include script.js from ConsoleAnnotatorFactorys and ConsoleAnnotationDescriptors.

getLoggerNames
```
public List<String> getLoggerNames()
```
Work around for bug 6935026.

getPasswordValue
```
public String getPasswordValue(Object o)
```
Used by <f:password/> so that we send an encrypted value to the client.

filterDescriptors

public List filterDescriptors(Object context,
                              Iterable descriptors)

getIsUnitTest
```
public static boolean getIsUnitTest()
```
Returns true if we are running unit tests.

isArtifactsPermissionEnabled
```
public static boolean isArtifactsPermissionEnabled()
```
Returns true if the Run.ARTIFACTS permission is enabled, false otherwise.
When the Run.ARTIFACTS permission is not turned on using the hudson.security.ArtifactsPermission system property, this permission must not be considered to be set to false for every user. It must rather be like if the permission doesn't exist at all (which means that every user has to have an access to the artifacts but the permission can't be configured in the security screen). Got it?

isWipeOutPermissionEnabled
```
public static boolean isWipeOutPermissionEnabled()
```
Returns true if the Item.WIPEOUT permission is enabled, false otherwise.
The "Wipe Out Workspace" action available on jobs is controlled by the Item.BUILD permission. For some specific projects, however, it is not acceptable to let users have this possibility, even it they can trigger builds. As such, when enabling the hudson.security.WipeOutPermission system property, a new "WipeOut" permission will allow to have greater control on the "Wipe Out Workspace" action.

createRenderOnDemandProxy

public static String createRenderOnDemandProxy(org.apache.commons.jelly.JellyContext context,
                                               String attributesToCapture)

getCurrentDescriptorByNameUrl

public static String getCurrentDescriptorByNameUrl()

setCurrentDescriptorByNameUrl

public static String setCurrentDescriptorByNameUrl(String value)

restoreCurrentDescriptorByNameUrl

public static void restoreCurrentDescriptorByNameUrl(String old)

getRequestHeaders

public static List<String> getRequestHeaders(String name)

rawHtml
```
public static Object rawHtml(Object o)
```
Used for arguments to internationalized expressions to avoid escape

getCLICommands

public static ArrayList<CLICommand> getCLICommands()

getAvatar
```
public static String getAvatar(User user,
                               String avatarSize)
```
Returns an avatar image URL for the specified user and preferred image size

Parameters:

user - the user

avatarSize - the preferred size of the avatar image

Returns:

a URL string

Since:

1.433

getUserAvatar

@Deprecated
public String getUserAvatar(User user,
                                        String avatarSize)

Deprecated. as of 1.451 Use getAvatar(hudson.model.User, java.lang.String)

humanReadableByteSize
```
public static String humanReadableByteSize(long size)
```
Returns human readable information about file size

Parameters:

size - file size in bytes

Returns:

file size in appropriate unit

breakableString
```
public static String breakableString(String plain)
```
Get a string that can be safely broken to several lines when necessary. This implementation inserts <wbr> tags into string. It allows browsers to wrap line before any sequence of punctuation characters or anywhere in the middle of prolonged sequences of word characters.

Since:

1.517

advertiseHeaders
```
public static void advertiseHeaders(javax.servlet.http.HttpServletResponse rsp)
```
Advertises the minimum set of HTTP headers that assist programmatic discovery of Jenkins.

isContextMenuVisible

@Restricted(value=org.kohsuke.accmod.restrictions.NoExternalUse.class)
public static boolean isContextMenuVisible(Action a)

Class Functions

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEBUG_YUI

Constructor Detail

Functions

Method Detail

generateId

isModel

isModelWithContextMenu

isModelWithChildren

isMatrixProject

xsDate

rfc822Date

isExtensionsAvailable

initPageVariables

getTypeParameter

getJDKDescriptor

getDiffString

getDiffString2

getDiffString2

addSuffix

decompose

getScreenResolution

getNodeModes

getProjectListString

ifThenElse

appendIfNotNull

getSystemProperties

getSystemProperty

getEnvVars

isWindows

isGlibcSupported

getLogRecords

printLogRecord

printLogRecordHtml

reverse

getCookie

getCookie

validateIconSize

getYuiSuffix

filter

filterExcludingFrom

configureAutoRefresh

isAutoRefresh

isCollapsed

getNearestAncestorUrl

getSearchURL

appendSpaceIfNotNull

nbspIndent

getWin32ErrorMessage

isMultiline

encode

escape

xmlEscape

xmlUnescape

htmlAttributeEscape

checkPermission

checkPermission

checkPermission

hasPermission

hasPermission

adminCheck

inferHudsonURL

getFooterURL

getJobPropertyDescriptors

getJobPropertyDescriptors

getBuildWrapperDescriptors

getSecurityRealmDescriptors

getAuthorizationStrategyDescriptors

getBuilderDescriptors

getPublisherDescriptors

getSCMDescriptors

getComputerLauncherDescriptors

getRetentionStrategyDescriptors

getParameterDescriptors