DZone Snippets: groovy code

List the 10 most recent files: Groovy version.

marcospereira (Marcos Silva Pereira) — Fri, 15 Aug 2008 05:16:03 GMT



def recents = new File(".").listFiles().findAll { it.file }.sort { it.lastModified() }.reverse()[0..9]

Showing a use to DELEGATE_FIRST closure resolve strategy: Selenium navigation

marcospereira (Marcos Silva Pereira) — Fri, 15 Aug 2008 05:06:25 GMT

// Show how to use groovy closures to write more clear selenium code



// More details here: http://snippets.dzone.com/posts/show/5922

// first, add a method to Selenium class

Selenium.metaClass.execute = { closure ->

    closure.delegate = delegate

    closure.resolveStrategy = Closure.DELEGATE_FIRST

    closure()

}





// making selenium stuff more clear



def selenium = getSelenium()

selenium.execute {

    type "field", "value"

    click "submitButton"

    waitForPageToLoad "5000"

    // do some more stuff

}

Making the methods and properties lookups inside a closure be resolved to the delegate.

marcospereira (Marcos Silva Pereira) — Fri, 15 Aug 2008 05:00:33 GMT

// The following code shows how methods and properties will be resolved to the delegate instead of the closure itself.



// creating a closure

def closure = {

    add "groovy"

    add "java"

}



// declaring a list

def list = []



// making the call methods inside closure be resolved to the list

closure.delegate = list

closure.resolveStrategy = Closure.DELEGATE_FIRST



// executing the closure

closure();



// now, the list was changed

list.each { println it }



// output 

// groovy

// java

Download a web page

sandeepsinghal (Sandeep Singhal) — Tue, 27 May 2008 11:07:43 GMT

// Groovy code to download a web-page





def download(address, outfile)

{

    def file = new FileOutputStream(outfile)

    def out = new BufferedOutputStream(file)

    out << new URL(address).openStream()

    out.close()

}



download("http://www.google.com", "google.html");

Groovy - Plain Text Word Wrap method

dwp (dave pugh) — Tue, 04 Dec 2007 00:43:53 GMT

// Groovy Method to perform word-wrap to a specified length.
// Returns a List of strings representing the wrapped text



// Quick and Dirty method for plain text word-wrap to a specified width

static class TextUtils {

	

	static String[] wrapntab(input, linewidth = 70, indent = 0) throws IllegalArgumentException {

		if(input == null)

			throw new IllegalArgumentException("Input String must be non-null")

		if(linewidth <= 1)

			throw new IllegalArgumentException("Line Width must be greater than 1")

		if(indent <= 0)

			throw new IllegalArgumentException("Indent must be greater than 0")

		

		def olines = []

		def oline = " " * indent

		

		input.split(" ").each() { wrd ->

			if( (oline.size() + wrd.size()) <= linewidth ) {

				oline <<= wrd <<= " "

			}else{

				olines += oline

				oline = " " * indent

			}

		}

		olines += oline

		return olines

	}

}



// TEST

// the input String

input = "Note From SUPPLIER: Booking confirmed by fax.  4 standard rooms - 3 twin shared, 1 single room, please advise if guests require meals.. "



// call static wrapntab method to break the input string into 70 char wide lines with a 4 char initial indent

olines = TextUtils.wrapntab(input,70,4)



// print the output

olines.each() {

	println it

}

Format code with line numbers in Markdown notation

devijvers (Steven Devijver) — Fri, 12 Oct 2007 12:09:19 GMT



C:\>type Format.groovy | groovy Format

     1: def counter = 1

     2:

     3: System.in.eachLine {

     4:         line ->

     5:

     6:         def result = "    "

     7:         (2 - ("" + counter).length()).times { result += " " }

     8:         result += "${counter}: ${line}"

     9:         println result

    10:         counter++

    11: }



C:\>



def counter = 1



System.in.eachLine {

	line ->

	

	def result = "    "

	(2 - ("" + counter).length()).times { result += " " }

	result += "${counter}: ${line}"

	println result

	counter++

}

Send a bad request to a web service for testing garbage resilience

devijvers (Steven Devijver) — Fri, 12 Oct 2007 12:07:41 GMT

// description of your code here



def link = "http://localhost:8080/webservices/MyWebService"



def url = new URL(link)



def conn = url.openConnection()

conn.doOutput = true



conn.outputStream << "BROL"



conn.inputStream.eachLine { println it }

capturing grails GSP output

graham (graham o'regan) — Sun, 22 Apr 2007 19:58:42 GMT

// this creates the template manually and captures the output of the GSP in a StringWriter called "writer"



def binding = [ dude : Dude.get( params.id ) ];  

def writer = new StringWriter();

def template = grailsAttributes.getPagesTemplateEngine().createTemplate("/WEB-INF/grails-app/views/dude/show.gsp", servletContext, request, response);

template.make(binding).writeTo(writer);

println(writer);