android - How to develop Custom Gradle Plugin with Java -


i attempting develop custom gradle plugin using java (and not groovy).

i using groovy plugin guide

    @override     void apply(project project) {         def hasapp = project.plugins.withtype(appplugin)         def haslib = project.plugins.withtype(libraryplugin)         if (!hasapp && !haslib) {             throw new illegalstateexception("'android' or 'android-library' plugin required.")         }          final def log = project.logger         final def variants         if (hasapp) {             variants = project.android.applicationvariants         } else {             variants = project.android.libraryvariants         }          project.dependencies {             debugcompile 'com.jakewharton.hugo:hugo-runtime:1.2.2-snapshot'             // todo should come transitively             debugcompile 'org.aspectj:aspectjrt:1.8.6'             compile 'com.jakewharton.hugo:hugo-annotations:1.2.2-snapshot'         }          project.extensions.create('hugo', hugoextension)          variants.all { variant ->             if (!variant.buildtype.isdebuggable()) {                 log.debug("skipping non-debuggable build type '${variant.buildtype.name}'.")                 return;             } else if (!project.hugo.enabled) {                 log.debug("hugo not disabled.")                 return;             }              javacompile javacompile = variant.javacompile             javacompile.dolast {                 string[] args = [                         "-showweaveinfo",                         "-1.5",                         "-inpath", javacompile.destinationdir.tostring(),                         "-aspectpath", javacompile.classpath.aspath,                         "-d", javacompile.destinationdir.tostring(),                         "-classpath", javacompile.classpath.aspath,                         "-bootclasspath", project.android.bootclasspath.join(file.pathseparator)                 ]                 log.debug "ajc args: " + arrays.tostring(args)                  messagehandler handler = new messagehandler(true);                 new main().run(args, handler);                 (imessage message : handler.getmessages(null, true)) {                     switch (message.getkind()) {                         case imessage.abort:                         case imessage.error:                         case imessage.fail:                             log.error message.message, message.thrown                             break;                         case imessage.warning:                             log.warn message.message, message.thrown                             break;                         case imessage.info:                             log.info message.message, message.thrown                             break;                         case imessage.debug:                             log.debug message.message, message.thrown                             break;                     }                 }             }         }     } }

i have developed checking android app / android library

 final plugincollection hasandroidappplugin = project.getplugins().withtype(appplugin.class);         final plugincollection hasandroidlibraryplugin = project.getplugins().withtype(libraryplugin.class);         if (hasandroidappplugin.isempty() & hasandroidlibraryplugin.isempty()) {             throw new illegalstateexception("'android' or 'android-library' plugin required.");         }

and setting dependencies

final dependencyhandler dependencyhandler = project.getdependencies();         dependencyhandler.add("debugcompile", "com.example.perspective:perspective-runtime:0.0.1");         dependencyhandler.add("debugcompile", "org.aspectj:aspectjrt:1.8.10.3");

how can achieve following using java?

i stuck trying identify "variants" e.g. applicationvariants/libraryvariants.

if (hasapp) {             variants = project.android.applicationvariants         } else {             variants = project.android.libraryvariants         }

disclaimer: i'm familiar gradle, not android

i'm guessing android property extension object. see plugin docs , extensioncontainer

if put println android build

println "${project.android.class.name}"

you'll see type extension object is. can do

androidmodel amodel = getproject().getextensions().getbytype(androidmodel.class)

i'm using androidmodel here, you'll replace whatever printed in println above

you do

object amodel = getproject().getextensions().getbyname("android"); system.out.println(amodel.getclass().getname());

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