Configuration of javadoc:javadoc fails with NPE upon disadvantageous order of
config injection
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Key: MJAVADOC-251
URL: http://jira.codehaus.org/browse/MJAVADOC-251
Project: Maven 2.x Javadoc Plugin
Issue Type: Bug
Affects Versions: 2.6
Reporter: Benjamin Bentmann
Priority: Critical
Compare these two logs from Maven 3.x
{noformat}
[DEBUG] Configuring mojo
'org.apache.maven.plugins:maven-javadoc-plugin:2.5:javadoc' with basic
configurator -->
[DEBUG] (f) nosince = false
[DEBUG] (f) use = true
[DEBUG] (f) bootclasspathArtifacts = []
[DEBUG] (f) links = []
[DEBUG] (f) encoding = UTF-8
[DEBUG] (f) aggregate = false
[DEBUG] (f) tags = []
[DEBUG] (f) isOffline = false
[DEBUG] (f) useStandardDocletOptions = true
[DEBUG] (f) taglets = []
[DEBUG] (f) doctitle = Maven Ant Plugin 2.3-SNAPSHOT API
[DEBUG] (f) resourcesArtifacts = []
[DEBUG] (s) reportOutputDirectory =
M:\maven\plugins\maven-ant-plugin\target\site\apidocs
Unable to parse the created DOM for plugin configuration
org.apache.maven.plugin.PluginConfigurationException: Unable to parse the
created DOM for plugin configuration
at
org.apache.maven.plugin.DefaultPluginManager.populatePluginFields(DefaultPluginManager.java:611)
at
org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(DefaultPluginManager.java:564)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:336)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:281)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:208)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:181)
at
org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:467)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:163)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:408)
at
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:351)
Caused by:
org.codehaus.plexus.component.configurator.ComponentConfigurationException:
Setter
org.apache.maven.plugin.javadoc.JavadocReport.setReportOutputDirectory(
java.lang.Class )
threw exception when called with parameter
'M:\maven\plugins\maven-ant-plugin\target\site\apidocs': null
at
org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.setValueUsingSetter(ComponentValueSetter.java:204)
at
org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.configure(ComponentValueSetter.java:225)
at
org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter.processConfiguration(ObjectWithFieldsConverter.java:140)
at
org.codehaus.plexus.component.configurator.BasicComponentConfigurator.configureComponent(BasicComponentConfigurator.java:58)
at
org.apache.maven.plugin.DefaultPluginManager.populatePluginFields(DefaultPluginManager.java:605)
... 16 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.setValueUsingSetter(ComponentValueSetter.java:191)
... 20 more
Caused by: java.lang.NullPointerException
at java.lang.String.endsWith(String.java:1466)
at
org.apache.maven.plugin.javadoc.JavadocReport.setReportOutputDirectory(JavadocReport.java:184)
... 25 more
{noformat}
and from Maven 2.2.x
{noformat}
[DEBUG] Configuring mojo
'org.apache.maven.plugins:maven-javadoc-plugin:2.5:javadoc' -->
[DEBUG] (f) aggregate = false
[DEBUG] (f) author = true
[DEBUG] (f) bootclasspathArtifacts = []
[DEBUG] (f) bottom = Copyright © {inceptionYear}-{currentYear}
{organizationName}. All Rights Reserved.
[DEBUG] (f) breakiterator = false
[DEBUG] (f) debug = false
[DEBUG] (f) destDir = apidocs
[DEBUG] (f) docfilessubdirs = false
[DEBUG] (f) docletArtifact = groupId = 'null'artifactId = 'null'version =
'null'
[DEBUG] (f) docletArtifacts = []
[DEBUG] (f) doctitle = Maven Ant Plugin 2.3-SNAPSHOT API
[DEBUG] (f) encoding = UTF-8
[DEBUG] (f) failOnError = true
[DEBUG] (f) groups = []
[DEBUG] (f) isOffline = false
[DEBUG] (f) javadocDirectory =
M:\maven\plugins\maven-ant-plugin\src\main\javadoc
[DEBUG] (f) keywords = false
[DEBUG] (f) links = []
[DEBUG] (f) linksource = false
[DEBUG] (f) localRepository = Repository[local|file://U:\Jeder\Maven-2]
[DEBUG] (f) nocomment = false
[DEBUG] (f) nodeprecated = false
[DEBUG] (f) nodeprecatedlist = false
[DEBUG] (f) nohelp = false
[DEBUG] (f) noindex = false
[DEBUG] (f) nonavbar = false
[DEBUG] (f) nooverview = false
[DEBUG] (f) nosince = false
[DEBUG] (f) notimestamp = false
[DEBUG] (f) notree = false
[DEBUG] (f) offlineLinks = []
[DEBUG] (f) old = false
[DEBUG] (f) outputDirectory = M:\maven\plugins\maven-ant-plugin\target\apidocs
[DEBUG] (f) overview =
M:\maven\plugins\maven-ant-plugin\src\main\javadoc\overview.html
[DEBUG] (f) project = MavenProject:
org.apache.maven.plugins:maven-ant-plugin:2.3-SNAPSHOT @
M:\maven\plugins\maven-ant-plugin\pom.xml
[DEBUG] (f) quiet = false
[DEBUG] (f) reactorProjects = [MavenProject:
org.apache.maven.plugins:maven-ant-plugin:2.3-SNAPSHOT @
M:\maven\plugins\maven-ant-plugin\pom.xml]
[DEBUG] (f) remoteRepositories =
[Repository[apache.snapshots|http://repository.apache.org/snapshots],
Repository[central|http://repo1.maven.org/maven2]]
[DEBUG] (s) reportOutputDirectory =
M:\maven\plugins\maven-ant-plugin\target\site\apidocs
[DEBUG] (f) resourcesArtifacts = []
[DEBUG] (f) serialwarn = false
[DEBUG] (f) session = org.apache.maven.execution.mavensess...@272961
[DEBUG] (f) settings = org.apache.maven.settings.setti...@1c0b8a0
[DEBUG] (f) show = protected
[DEBUG] (f) skip = false
[DEBUG] (f) splitindex = false
[DEBUG] (f) stylesheet = java
[DEBUG] (f) tagletArtifact = groupId = 'null'artifactId = 'null'version =
'null'
[DEBUG] (f) tagletArtifacts = []
[DEBUG] (f) taglets = []
[DEBUG] (f) tags = []
[DEBUG] (f) use = true
[DEBUG] (f) useStandardDocletOptions = true
[DEBUG] (f) verbose = false
[DEBUG] (f) version = true
[DEBUG] (f) windowtitle = Maven Ant Plugin 2.3-SNAPSHOT API
[DEBUG] -- end configuration --
{noformat}
Note the different order in which the parameter values are injected. When
{{reportOutputDirectory}} is injected before {{destDir}}, the mojo produces the
NPE.
The plugin should not rely on any particular ordering of the parameters.
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