private PlexusConfiguration mergeMojoConfiguration()

in maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginManager.java [1184:1258]
56 lines of code
14 McCabe index (conditional complexity)

    private PlexusConfiguration mergeMojoConfiguration( XmlPlexusConfiguration fromPom,
                                                        MojoDescriptor mojoDescriptor )
    {
        XmlPlexusConfiguration result = new XmlPlexusConfiguration( fromPom.getName() );
        result.setValue( fromPom.getValue( null ) );

        if ( mojoDescriptor.getParameters() != null )
        {
            PlexusConfiguration fromMojo = mojoDescriptor.getMojoConfiguration();

            for ( Iterator it = mojoDescriptor.getParameters().iterator(); it.hasNext(); )
            {
                Parameter parameter = (Parameter) it.next();

                String paramName = parameter.getName();
                String alias = parameter.getAlias();
                String implementation = parameter.getImplementation();

                PlexusConfiguration pomConfig = fromPom.getChild( paramName );
                PlexusConfiguration aliased = null;

                if ( alias != null )
                {
                    aliased = fromPom.getChild( alias );
                }

                PlexusConfiguration mojoConfig = fromMojo.getChild( paramName, false );

                // first we'll merge configurations from the aliased and real params.
                // TODO: Is this the right thing to do?
                if ( aliased != null )
                {
                    if ( pomConfig == null )
                    {
                        pomConfig = new XmlPlexusConfiguration( paramName );
                    }

                    pomConfig = buildTopDownMergedConfiguration( pomConfig, aliased );
                }

                PlexusConfiguration toAdd = null;

                if ( pomConfig != null )
                {
                    pomConfig = buildTopDownMergedConfiguration( pomConfig, mojoConfig );

                    if ( StringUtils.isNotEmpty( pomConfig.getValue( null ) ) || ( pomConfig.getChildCount() > 0 ) )
                    {
                        toAdd = pomConfig;
                    }
                }

                if ( ( toAdd == null ) && ( mojoConfig != null ) )
                {
                    toAdd = copyConfiguration( mojoConfig );
                }

                if ( toAdd != null )
                {
                    if ( ( implementation != null ) && ( toAdd.getAttribute( "implementation", null ) == null ) )
                    {

                        XmlPlexusConfiguration implementationConf = new XmlPlexusConfiguration( paramName );

                        implementationConf.setAttribute( "implementation", parameter.getImplementation() );

                        toAdd = buildTopDownMergedConfiguration( toAdd, implementationConf );
                    }

                    result.addChild( toAdd );
                }
            }
        }
        return result;
    }