java - Javadoc cannot find classes written in scala -

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i working on project mixed java , scala code. using maven dependency management , intellij idea development. have added maven-javadoc plugin generating java documentation. however, cannot find scala classes. keeps on throwing errors follows:

warning] javadoc warnings [warning] /users/mshinde/myproject-code/mlhighway/src/main/java/com/myproject/analytics/model/project.java:12: cannot find symbol [warning] symbol  : class sparkjoiner [warning] location: package com.myproject.analytics.jobdriver [warning] import com.myproject.analytics.jobdriver.sparkjoiner; [warning] ^ [warning] /users/mshinde/myproject-code/mlhighway/src/main/java/com/myproject/analytics/model/dataset.java:12: cannot find symbol [warning] symbol  : class transformer [warning] location: package com.myproject.analytics.jobdriver [warning] import com.myproject.analytics.jobdriver.transformer; [warning] ^ [warning] /users/mshinde/myproject-code/mlhighway/src/main/java/com/myproject/analytics/dataview/impalaview.java:3: cannot find symbol [warning] symbol  : class sparkclassificationmetrics [warning] location: package com.myproject.analytics.framework.evaluator [warning] import com.myproject.analytics.framework.evaluator.sparkclassificationmetrics; [warning] ^ [warning] /users/mshinde/myproject-code/mlhighway/src/main/java/com/myproject/analytics/dataview/impalaview.java:212: package sparkclassificationmetrics not exist [warning] sparkclassificationmetrics.sparkmetrics sparkmetrics) { [warning] ^

my directory structure follows:

src/   main/     java/       com/myproject/analytics     scala/       com/myproject/analytics

i able compile project , run it. want know how rid of warnings? how javadoc able find scala classes? in advance.


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