Plugins depending on 3rd party JARs that contain the Maven API can't be
configured/run due to type incompatibilities
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Key: MNG-4895
URL: http://jira.codehaus.org/browse/MNG-4895
Project: Maven 2 & 3
Issue Type: Bug
Components: Plugins and Lifecycle
Affects Versions: 3.0, 2.2.1
Reporter: Benjamin Bentmann
For communication between Maven core and plugins, the classes of the Maven API
need to be loaded from the Maven core and not the plugin realm. Maven currently
tries to accomplish this by filtering out plugin dependencies based on artifact
coordinates. Despite the general maintenance issue when we refactor
code/modules, this completely fails with errors like below when plugins depend
on 3rd party JARs that contain a (non-relocated) copy of the Maven API as
recently seen with Flex.
{noformat}
Caused by:
org.codehaus.plexus.component.configurator.ComponentConfigurationException:
Cannot assign configuration entry 'project' to 'class
org.apache.maven.project.MavenProject' from '${project}', which is of type
class org.apache.maven.project.MavenProject
at
org.codehaus.plexus.component.configurator.converters.AbstractConfigurationConverter.fromExpression(AbstractConfigurationConverter.java:149)
at
org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter.fromConfiguration(ObjectWithFieldsConverter.java:80)
at
org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.configure(ComponentValueSetter.java:247)
at
org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter.processConfiguration(ObjectWithFieldsConverter.java:137)
at
org.codehaus.plexus.component.configurator.BasicComponentConfigurator.configureComponent(BasicComponentConfigurator.java:56)
at
org.apache.maven.plugin.DefaultPluginManager.populatePluginFields(DefaultPluginManager.java:1357)
{noformat}
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