Antony Riley created MPLUGIN-320:
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Summary: JavaJavadocMojoDescriptorExtractor fails with Java 8
lambdas.
Key: MPLUGIN-320
URL: https://issues.apache.org/jira/browse/MPLUGIN-320
Project: Maven Plugin Tools
Issue Type: Bug
Components: maven-plugin-tools-java
Affects Versions: 3.5
Reporter: Antony Riley
Priority: Minor
JavaJavadocMojoDescriptorExtractor fails to parse the following source:
{code:java}
package com.example.plugin;
import com.amazonaws.AmazonWebServiceClient;
import com.amazonaws.services.ecr.AmazonECRClient;
import com.amazonaws.services.ecs.AmazonECSClient;
import java.util.function.Supplier;
public enum AmazonClients {
ECS(AmazonECSClient::new),
ECR(AmazonECRClient::new);
private final Supplier<? extends AmazonWebServiceClient> supplier;
<T extends AmazonWebServiceClient> AmazonClients(Supplier<T> supplier) {
this.supplier = new SingletonSupplier<T>(supplier);
}
public <T extends AmazonWebServiceClient> T get() {
return (T) supplier.get();
}
private static class SingletonSupplier<T> implements Supplier<T> {
private final Supplier<T> realSupplier;
private T instance;
private SingletonSupplier(Supplier<T> realSupplier) {
this.realSupplier = realSupplier;
}
@Override
public synchronized T get() {
return instance == null ? instance = realSupplier.get() : instance;
}
}
}
{code}
It fails on the lamdas in the constructors, this causes
maven-plugin-plugin:helpmojo to fail with the following exception:
{noformat}
Caused by: com.thoughtworks.qdox.parser.ParseException: syntax error @[10,24]
in
file:/home/antony/work/meter-download-site-v2/ecs-deploy-maven-plugin/src/main/java/com/vertoanalytics/meterdownloadsite/maven/AmazonClients.java
at com.thoughtworks.qdox.parser.impl.Parser.yyerror(Parser.java:1739)
at com.thoughtworks.qdox.parser.impl.Parser.yyparse(Parser.java:1861)
at com.thoughtworks.qdox.parser.impl.Parser.parse(Parser.java:1720)
at
com.thoughtworks.qdox.library.SourceLibrary.parse(SourceLibrary.java:232)
at
com.thoughtworks.qdox.library.SourceLibrary.parse(SourceLibrary.java:209)
at
com.thoughtworks.qdox.library.SourceLibrary.addSource(SourceLibrary.java:157)
at
com.thoughtworks.qdox.library.SortedClassLibraryBuilder.addSource(SortedClassLibraryBuilder.java:173)
at
com.thoughtworks.qdox.JavaProjectBuilder.addSource(JavaProjectBuilder.java:151)
at
com.thoughtworks.qdox.JavaProjectBuilder$2.visitFile(JavaProjectBuilder.java:223)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:103)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:91)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:91)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:91)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:91)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.walk(DirectoryScanner.java:91)
at
com.thoughtworks.qdox.directorywalker.DirectoryScanner.scan(DirectoryScanner.java:81)
at
com.thoughtworks.qdox.JavaProjectBuilder.addSourceTree(JavaProjectBuilder.java:217)
at
com.thoughtworks.qdox.JavaProjectBuilder.addSourceTree(JavaProjectBuilder.java:204)
at
org.apache.maven.tools.plugin.extractor.javadoc.JavaJavadocMojoDescriptorExtractor.discoverClasses(JavaJavadocMojoDescriptorExtractor.java:625)
at
org.apache.maven.tools.plugin.extractor.javadoc.JavaJavadocMojoDescriptorExtractor.execute(JavaJavadocMojoDescriptorExtractor.java:573)
at
org.apache.maven.tools.plugin.scanner.DefaultMojoScanner.populatePluginDescriptor(DefaultMojoScanner.java:96)
at
org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:283)
at
org.apache.maven.plugin.plugin.HelpGeneratorMojo.execute(HelpGeneratorMojo.java:92)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
... 21 more
{noformat}
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