Comment puis-je récupérer un élément de GPathResult de Groovy en utilisant une chaîne qui contient un perioïde

Question

def elementPath = "elementA.elementB" 
xml."${elementPath}".each {} 

Comment faire pour que cela fonctionne? xml.elementA.elementB.each {} fonctionne.

Answer 1

Je peux penser à 2 voies autour de cette ...

// Dummy Data for the testing 
def CAR_RECORDS = ''' 
    <records> 
     <car name='HSV Maloo' make='Holden' year='2006'> 
     <country>Australia</country> 
     <record type='speed'>Production Pickup Truck with speed of 271kph</record> 
     </car> 
     <car name='P50' make='Peel' year='1962'> 
     <country>Isle of Man</country> 
     <record type='size'>Smallest Street-Legal Car at 99cm wide and 59 kg in weight</record> 
     </car> 
     <car name='Royale' make='Bugatti' year='1931'> 
     <country>France</country> 
     <record type='price'>Most Valuable Car at $15 million</record> 
     </car> 
    </records> 
    ''' 
def xml = new XmlSlurper().parseText(CAR_RECORDS) 
def propNames = 'car.country' 

// METHOD 1 
// Split the propnames into individual properties, then use Inject to walk down this list 
// Passing the result to the next property 
propNames.split(/\./).inject(xml) { obj, prop -> obj?."$prop" }.each { println it.text() } 

// METHOD 2 
// Construct a string to evaluate, and pass the xml object to it (it gets substituted in place of x) 
Eval.x(xml, "x.${propNames}").each { println it.text() } 

Le javadoc page for Eval.x is here

Hope this helps :-)

Answer 2

xml."elementA.elementB".each {}