CODEWITHSUNDEEP
reflectiongroovy
Abdennour TOUMI
Abdennour TOUMI

Reputation: 93183

How can I find all implementations of interface in classpath in groovy project?

I'm implementing an interface and now I'd like to get all implementations of this interface in classpath. Is this possible or should I do something else?

Upvotes: 10

Views: 1826

Answers (1)

tim_yates
tim_yates

Reputation: 171084

You can use the Reflections library for this sort of thing, ie; to find all classes in org.codehaus.groovy which implement the Iterator interface, you can do:

@Grab( 'org.slf4j:slf4j-api:1.7.5' )
@Grab( 'org.reflections:reflections:0.9.9-RC1' )
import org.reflections.*

new Reflections( 'org.codehaus.groovy' ).getSubTypesOf( Iterator ).each {
    println it.name
}

Which prints:

org.codehaus.groovy.runtime.StringGroovyMethods$1
org.codehaus.groovy.runtime.SwingGroovyMethods$7
org.codehaus.groovy.util.ArrayIterator
org.codehaus.groovy.runtime.metaclass.ConcurrentReaderHashMap$KeyIterator
org.codehaus.groovy.control.CompilationUnit$9
org.codehaus.groovy.runtime.SqlGroovyMethods$ResultSetMetaDataIterator
org.codehaus.groovy.runtime.SwingGroovyMethods$1
org.codehaus.groovy.util.ManagedLinkedList$Iter
org.codehaus.groovy.runtime.SwingGroovyMethods$3
org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$2
org.codehaus.groovy.runtime.SwingGroovyMethods$6
org.codehaus.groovy.ant.FileIterator
org.codehaus.groovy.runtime.IOGroovyMethods$3
org.codehaus.groovy.runtime.DefaultGroovyMethods$DropWhileIterator
org.codehaus.groovy.runtime.DefaultGroovyMethods$TakeIterator
org.codehaus.groovy.runtime.DefaultGroovyMethods$3
org.codehaus.groovy.runtime.SwingGroovyMethods$5
org.codehaus.groovy.runtime.SwingGroovyMethods$2
org.codehaus.groovy.runtime.metaclass.ConcurrentReaderHashMap$HashIterator
org.codehaus.groovy.runtime.metaclass.ConcurrentReaderHashMap$ValueIterator
org.codehaus.groovy.runtime.XmlGroovyMethods$1
org.codehaus.groovy.runtime.SwingGroovyMethods$4
org.codehaus.groovy.runtime.IOGroovyMethods$2
org.codehaus.groovy.runtime.ReverseListIterator
org.codehaus.groovy.runtime.DefaultGroovyMethods$TakeWhileIterator

Upvotes: 9

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