Groovy Declared Fields Filter Synthetic

Groovy generates some "synthetic" field to a class, that means the reflection method getDeclaredFields returns more fields than fields which are declared in the Groovy source of a class. To filter the "synthetic" fields the Groovy grep method could be used e.g. "anyClass. declaredFields.grep { !it.synthetic }".

	import org.junit.Test
	class DeclaredFieldsTest
	{
	static {
	Class.metaClass.getNonSyntheticFields = { ->
	delegate.declaredFields.grep { !it.synthetic }
	}
	}
	class Data {
	public String name
	public int count
	static def field(name) { Data.class.getField(name) }
	}
	@Test void getDeclaredFields() {
	def expectedFields = [Data.field('name'), Data.field('count')]
	assert expectedFields == Data.class.nonSyntheticFields
	}
	}

view raw DeclaredFieldsTest.groovy hosted with ❤ by GitHub

Links

• http://stackoverflow.com/questions/6069513/can-we-get-declared-properties-of-a-groovy-class-by-its-order