o new plugin descriptor builder

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@163217 13f79535-47bb-0310-9956-ffa450edef68

maven-plugin/src/main/java/org/apache/maven/plugin/descriptor/PluginDescriptorBuilder.java

@@ -0,0 +1,161 @@
+package org.apache.maven.plugin.descriptor;
+
+import org.codehaus.plexus.configuration.PlexusConfiguration;
+import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
+import org.codehaus.plexus.util.xml.Xpp3DomBuilder;
+
+import java.io.Reader;
+import java.util.ArrayList;
+import java.util.List;
+
+
+/**
+ * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
+ * @version $Id$
+ * @todo these are all really tools for dealing with xml configurations so they
+ * should be packaged as such.
+ */
+public class PluginDescriptorBuilder
+{
+    public PluginDescriptor build( Reader reader )
+        throws Exception
+    {
+        PlexusConfiguration c = buildConfiguration( reader );
+
+        PluginDescriptor pluginDescriptor = new PluginDescriptor();
+
+        pluginDescriptor.setId( c.getChild( "id" ).getValue() );
+
+        // ----------------------------------------------------------------------
+        // Components
+        // ----------------------------------------------------------------------
+
+        PlexusConfiguration[] mojoConfigurations = c.getChild( "mojos" ).getChildren( "mojo" );
+
+        List mojos = new ArrayList();
+
+        for ( int i = 0; i < mojoConfigurations.length; i++ )
+        {
+            PlexusConfiguration component = mojoConfigurations[i];
+
+            mojos.add( buildComponentDescriptor( component ) );
+        }
+
+        pluginDescriptor.setMojos( mojos );
+
+        // ----------------------------------------------------------------------
+        // Dependencies
+        // ----------------------------------------------------------------------
+
+        PlexusConfiguration[] dependencyConfigurations = c.getChild( "dependencies" ).getChildren( "dependency" );
+
+        List dependencies = new ArrayList();
+
+        for ( int i = 0; i < dependencyConfigurations.length; i++ )
+        {
+            PlexusConfiguration d = dependencyConfigurations[i];
+
+            Dependency cd = new Dependency();
+
+            cd.setArtifactId( d.getChild( "artifactId" ).getValue() );
+
+            cd.setGroupId( d.getChild( "groupId" ).getValue() );
+
+            cd.setType( d.getChild( "type" ).getValue() );
+
+            cd.setVersion( d.getChild( "version" ).getValue() );
+
+            dependencies.add( cd );
+        }
+
+        pluginDescriptor.setDependencies( dependencies );
+
+        return pluginDescriptor;
+    }
+
+    public MojoDescriptor buildComponentDescriptor( PlexusConfiguration c )
+        throws Exception
+    {
+        MojoDescriptor mojo = new MojoDescriptor();
+
+        mojo.setId( c.getChild( "id" ).getValue() );
+
+        mojo.setImplementation( c.getChild( "implementation" ).getValue() );
+
+        mojo.setInstantiationStrategy( c.getChild( "instantiationStrategy" ).getValue() );
+
+        mojo.setDescription( c.getChild( "description" ).getValue() );
+
+        String dependencyResolution = c.getChild( "requiresDependencyResolution" ).getValue();
+
+        if ( dependencyResolution != null )
+        {
+            mojo.setRequiresDependencyResolution( dependencyResolution.equals( "true" ) ? true : false );
+        }
+
+        // ----------------------------------------------------------------------
+        // Parameters
+        // ----------------------------------------------------------------------
+
+        PlexusConfiguration[] parameterConfigurations = c.getChild( "parameters" ).getChildren( "parameter" );
+
+        List parameters = new ArrayList();
+
+        for ( int i = 0; i < parameterConfigurations.length; i++ )
+        {
+            PlexusConfiguration d = parameterConfigurations[i];
+
+            Parameter cd = new Parameter();
+
+            cd.setName( d.getChild( "name" ).getValue() );
+
+            cd.setType( d.getChild( "type" ).getValue() );
+
+            String s = c.getChild( "required" ).getValue();
+
+            if ( s != null )
+            {
+                cd.setRequired( s.equals( "true" ) ? true : false );
+            }
+
+            cd.setValidator( d.getChild( "validator" ).getValue() );
+
+            cd.setDescription( d.getChild( "description" ).getValue() );
+
+            cd.setExpression( d.getChild( "expression" ).getValue() );
+
+            parameters.add( cd );
+        }
+
+        mojo.setParameters( parameters );
+
+        // ----------------------------------------------------------------------
+        // Prereqs
+        // ----------------------------------------------------------------------
+
+        PlexusConfiguration[] prereqConfigurations = c.getChild( "prereqs" ).getChildren( "prereq" );
+
+        List prereqs = new ArrayList();
+
+        for ( int i = 0; i < prereqConfigurations.length; i++ )
+        {
+            PlexusConfiguration d = prereqConfigurations[i];
+
+            prereqs.add( d.getValue() );
+        }
+
+        mojo.setPrereqs( prereqs );
+
+        return mojo;
+    }
+
+    // ----------------------------------------------------------------------
+    //
+    // ----------------------------------------------------------------------
+
+    public PlexusConfiguration buildConfiguration( Reader configuration )
+        throws Exception
+    {
+        return new XmlPlexusConfiguration( Xpp3DomBuilder.build( configuration ) );
+    }
+}