When you do apply from: 'other.gradle' it does weird classloader things
such that the two scripts have different classloaders (and thus even though
it's the "same" class, it's not seen as the same to the JVM - a very
irritating aspect of Gradle build scripts).
Can you put that same code at the end of the file instead? If that works
then it's likely this.
I can't suggest a work-around unfortunately other than not using "apply
from" (if you do discover a nice fix please post it)
On Tuesday, May 9, 2017 at 6:35:13 PM UTC+9:30, Malcolm Evershed wrote:
>
> My app/build.gradle says at the end "apply from: 'other.gradle'". The
> other.gradle file is very simple and contains the following:
>
> buildscript {
>
> repositories {
>
> jcenter()
>
> }
>
> dependencies {
>
> // Needed for com.android.build.api classes
>
> classpath 'com.android.tools.build:gradle-api:2.3.1'
>
> }
>
> }
>
>
> import com.android.build.api.transform.QualifiedContent
>
> import com.android.build.api.transform.Transform
>
>
> // Stub implementation
>
> class MyTransform extends Transform {
>
> @Override
>
> String getName() {
>
> return null
>
> }
>
>
> @Override
>
> Set<QualifiedContent.ContentType> getInputTypes() {
>
> return null
>
> }
>
>
> @Override
>
> Set<QualifiedContent.Scope> getScopes() {
>
> return null
>
> }
>
>
> @Override
>
> boolean isIncremental() {
>
> return false
>
> }
>
> }
>
>
> Class parameterClass
>
>
> for (def method : android.getClass().getMethods()) {
>
> if (method.getName() == "registerTransform") {
>
> parameterClass = method.getParameterTypes()[0]
>
> println 'Class of first parameter to android.registerTransform: ' +
> parameterClass
>
> }
>
> }
>
>
> Class superClass = MyTransform.class.getSuperclass()
>
> println 'Class of parameter that we want to pass to
> android.registerTransform: ' + superClass
>
> println 'Are the names of the two types equal? ' +
> superClass.getCanonicalName().equals(parameterClass.getCanonicalName())
>
> println 'Are the two types equal? ' + superClass.equals(parameterClass)
>
>
> *// This fails with:*
>
> *//
> org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException:
> Could*
>
> *// not find method registerTransform() for arguments [MyTransform@cac15ac]
> on object of type*
>
> *// com.android.build.gradle.AppExtension.*
>
> android.registerTransform(new MyTransform())
>
>
> Why is this occuring? How can it be dealt with?
>
> The printlns suggest that the superclass of MyTransform is a different
> type from the first parameter to registerTransform(), but I don't
> understand how that could be. The names match, but somehow the types are
> not the same.
>
> Thanks.
>
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