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SUMMARY: REQUIRED | OPTIONAL DETAIL: ELEMENT

groovy.lang
[Java] Annotation Type Grab

java.lang.Object
  groovy.lang.Grab

@Retention(RetentionPolicy.SOURCE)
@Target({
        ElementType.CONSTRUCTOR,
        ElementType.FIELD,
        ElementType.LOCAL_VARIABLE,
        ElementType.METHOD,
        ElementType.PARAMETER,
        ElementType.TYPE})
public @interface Grab

Used to grab the referenced artifact and its dependencies and make it available on the Classpath.

Some examples: 

 @Grab(group='commons-lang', module='commons-lang', version='2.4')
 import org.apache.commons.lang.WordUtils
 println "Hello ${WordUtils.capitalize('world')}"
Or using the compact Gradle-inspired syntax: 
 @Grab('commons-lang:commons-lang:2.4')
 import org.apache.commons.lang.WordUtils
 println "Hello ${WordUtils.capitalize('world')}"
or the same thing again using the Ivy-inspired syntax variant: 
 @Grab('commons-lang#commons-lang;2.4')
 import org.apache.commons.lang.WordUtils
 println "Hello ${WordUtils.capitalize('world')}"
Further information such as where artifacts are downloaded to, how to add additional resolvers, how to customise artifact resolution etc., can be found on the Grape documentation page: http://groovy.codehaus.org/Grape.

Required Element Summary
java.lang.String module

The module or artifact, e.g.: "ant-junit"
java.lang.String version

The revision or version, e.g.: "1.7.1"
 
Optional Element Summary
boolean changing

Defaults to false but set to true if the dependency artifacts may change without a corresponding revision change.

java.lang.String classifier

The classifier if in use, e.g.: "jdk14" @default ""
java.lang.String conf

The configuration if in use (normally only used by internal ivy repositories).

java.lang.String ext

The extension of the artifact (normally safe to leave at default value of "jar" but other values like "zip" are sometimes useful).

boolean force

Defaults to false but set to true to indicate to the underlying Ivy conflict manager that this dependency should be forced to the given revision.

java.lang.String group

The organisation or group, e.g.: "org.apache.ant" @default ""
boolean initClass

By default, when a @Grab annotation is used, the grab() call is added to the static initializers of the class the annotatable node appears in.

boolean transitive

Defaults to true but set to false if you don't want transitive dependencies also to be downloaded.

java.lang.String type

The type of the artifact (normally safe to leave at default value of "jar" but other values like "sources" and "javadoc" are sometimes useful).

java.lang.String value

Allows a more compact convenience form in one of two formats with optional appended attributes.

 
Method Summary
 
Methods inherited from class java.lang.Object
java.lang.Object#wait(long), java.lang.Object#wait(long, int), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()
 

Element Detail

changing

public boolean changing
Defaults to false but set to true if the dependency artifacts may change without a corresponding revision change. Not normally recommended but may be useful for certain kinds of snapshot artifacts. May reduce the amount of underlying Ivy caching. Proper behavior may be dependent on the resolver in use. @default false

classifier

public java.lang.String classifier
The classifier if in use, e.g.: "jdk14" @default ""

conf

public java.lang.String conf
The configuration if in use (normally only used by internal ivy repositories). One or more comma separated values with or without square brackets, e.g. for hibernate you might have "default,proxool,oscache" or "[default,dbcp,swarmcache]". This last hibernate example assumes you have set up such configurations in your local Ivy repo and have changed your grape config (using grapeConfig.xml) or the @GrabConfig annotation to point to that repo. @default ""

ext

public java.lang.String ext
The extension of the artifact (normally safe to leave at default value of "jar" but other values like "zip" are sometimes useful). @default ""

force

public boolean force
Defaults to false but set to true to indicate to the underlying Ivy conflict manager that this dependency should be forced to the given revision. Otherwise, depending on the conflict manager in play, a later compatible version might be used instead. @default false

group

public java.lang.String group
The organisation or group, e.g.: "org.apache.ant" @default ""

initClass

public boolean initClass
By default, when a @Grab annotation is used, the grab() call is added to the static initializers of the class the annotatable node appears in. If you wish to disable this, add initClass=false to the annotation. @default true

module

public java.lang.String module
The module or artifact, e.g.: "ant-junit"

transitive

public boolean transitive
Defaults to true but set to false if you don't want transitive dependencies also to be downloaded. You may then need additional @Grab statements for any required dependencies. @default true

type

public java.lang.String type
The type of the artifact (normally safe to leave at default value of "jar" but other values like "sources" and "javadoc" are sometimes useful). But see also the "classifier" attribute which is also sometimes used for "sources" and "javadoc". @default ""

value

public java.lang.String value
Allows a more compact convenience form in one of two formats with optional appended attributes.

You can choose either format but not mix-n-match:
group:module:version:classifier@ext (where only group and module are required)
group#module;version[confs] (where only group and module are required and confs, if used, is one or more comma separated configuration names)
In addition, you can add any valid Ivy attributes at the end of your string value using semi-colon separated name = value pairs, e.g.:
@Grab('junit:junit:*;transitive=false')
@Grab('group=junit;module=junit;version=4.8.2;classifier=javadoc')
@default ""

version

public java.lang.String version
The revision or version, e.g.: "1.7.1"

 

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