001    /*****************************************************************************
002     * Copyright (C) NanoContainer Organization. All rights reserved.            *
003     * ------------------------------------------------------------------------- *
004     * The software in this package is published under the terms of the BSD      *
005     * style license a copy of which has been included with this distribution in *
006     * the LICENSE.txt file.                                                     *
007     *                                                                           *
008     * Original code by James Strachan                                           *
009     *****************************************************************************/
010    
011    package org.nanocontainer.script.groovy.buildernodes;
012    
013    import java.util.Map;
014    
015    import org.nanocontainer.NanoContainer;
016    import org.nanocontainer.script.NanoContainerMarkupException;
017    import groovy.lang.GroovyObject;
018    import org.nanocontainer.DefaultNanoContainer;
019    import org.picocontainer.MutablePicoContainer;
020    
021    /**
022     * Handles the child of container 'newBuilder' node.
023     * @author James Strachan
024     * @author Paul Hammant
025     * @author Aslak Hellesøy
026     * @author Michael Rimov
027     * @author Mauro Talevi
028     * @version $Revision: 2695 $
029     */
030    public class NewBuilderNode extends AbstractBuilderNode {
031    
032        /**
033         * Node name we're handling: 'newBuilder'.
034         */
035        public static final String NODE_NAME = "newBuilder";
036    
037        /**
038         * Supported attribute: 'class'.
039         */
040        public static final String CLASS_ATTRIBUTE = "class";
041    
042        /**
043         * Suppoerted attribute 'validating'.  Indicates that attributes should
044         * be validated and NanoContainerMarkupException should be thrown
045         * if invalid attributes are found.
046         * @todo Not yet implemented. How do we get NanoContainer to register
047         * a component instance?  -MR
048         */
049        public static final String VALIDATE_ATTRIBUTE = "validating";
050    
051    
052        public NewBuilderNode() {
053            super(NODE_NAME);
054    
055            addAttribute(CLASS_ATTRIBUTE);
056            addAttribute(VALIDATE_ATTRIBUTE);
057        }
058    
059        public Object createNewNode(final Object current, final Map attributes) {
060            Object builderClass = attributes.remove(CLASS_ATTRIBUTE);
061    
062    
063            NanoContainer factory = new DefaultNanoContainer();
064            MutablePicoContainer parentPico = ((NanoContainer) current).getPico();
065            factory.getPico().registerComponentInstance(MutablePicoContainer.class, parentPico);
066            try {
067                if (builderClass instanceof String) {
068                    factory.registerComponentImplementation(GroovyObject.class, (String) builderClass);
069                } else {
070                    factory.getPico().registerComponentImplementation(GroovyObject.class, (Class) builderClass);
071                }
072            } catch (ClassNotFoundException e) {
073                throw new NanoContainerMarkupException("ClassNotFoundException " + builderClass);
074            }
075            Object componentInstance = factory.getPico().getComponentInstance(GroovyObject.class);
076            return componentInstance;
077        }
078    
079    }