Package org.nanocontainer.script.groovy.buildernodes

Source Code of org.nanocontainer.script.groovy.buildernodes.NewBuilderNode

/*****************************************************************************
* Copyright (C) NanoContainer Organization. All rights reserved.            *
* ------------------------------------------------------------------------- *
* The software in this package is published under the terms of the BSD      *
* style license a copy of which has been included with this distribution in *
* the LICENSE.txt file.                                                     *
*                                                                           *
* Original code by James Strachan                                           *
*****************************************************************************/

package org.nanocontainer.script.groovy.buildernodes;

import java.util.Map;

import org.nanocontainer.NanoContainer;
import org.nanocontainer.script.NanoContainerMarkupException;
import groovy.lang.GroovyObject;
import org.nanocontainer.DefaultNanoContainer;
import org.picocontainer.MutablePicoContainer;

/**
* Handles the child of container 'newBuilder' node.
* @author James Strachan
* @author Paul Hammant
* @author Aslak Hellesøy
* @author Michael Rimov
* @author Mauro Talevi
* @version $Revision: 2695 $
*/
public class NewBuilderNode extends AbstractCustomBuilderNode {

    /**
     * Node name we're handling: 'newBuilder'.
     */
    public static final String NODE_NAME = "newBuilder";

    /**
     * Supported attribute: 'class'.
     */
    public static final String CLASS_ATTRIBUTE = "class";

    /**
     * Suppoerted attribute 'validating'.  Indicates that attributes should
     * be validated and NanoContainerMarkupException should be thrown
     * if invalid attributes are found.
     * @todo Not yet implemented. How do we get NanoContainer to register
     * a component instance?  -MR
     */
    public static final String VALIDATE_ATTRIBUTE = "validating";


    public NewBuilderNode() {
        super(NODE_NAME);

        addAttribute(CLASS_ATTRIBUTE);
        addAttribute(VALIDATE_ATTRIBUTE);
    }

    public Object createNewNode(final NanoContainer parentContainer, final Map attributes) throws ClassNotFoundException {
        String builderClass = (String) attributes.remove(CLASS_ATTRIBUTE);

        NanoContainer factory = new DefaultNanoContainer();
        MutablePicoContainer parentPico = parentContainer.getPico();
        factory.getPico().registerComponentInstance(MutablePicoContainer.class, parentPico);
        try {
            factory.registerComponentImplementation(GroovyObject.class, builderClass);
        } catch (ClassNotFoundException e) {
            throw new NanoContainerMarkupException("ClassNotFoundException " + builderClass);
        }
        Object componentInstance = factory.getPico().getComponentInstance(GroovyObject.class);
        return componentInstance;
    }

}
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