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Groovy example source code file (RendererFactory.groovy)

This example Groovy source code file (RendererFactory.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

abstractfactory, abstractfactory, awt, closure, closure, closurerenderer, component, gui, jlist, jtree, map, map, object, object, rendererfactory, rendererupdatefactory, swing

The Groovy RendererFactory.groovy source code

 * Copyright 2008 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package groovy.swing.factory

import groovy.swing.impl.ClosureRenderer
import java.awt.Component
import javax.swing.JList
import javax.swing.JTree

 * @author Danno Ferrin
class RendererFactory extends AbstractFactory {

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) {
        FactoryBuilderSupport.checkValueIsNull value, name
        return new ClosureRenderer()

    public void setChild(FactoryBuilderSupport builder, Object parent, Object child) {
        if (child instanceof Component) {
            parent.children += child

    public void onNodeCompleted(FactoryBuilderSupport builder, Object parent, Object node) {
        node.update = builder.context.updateClosure
        if (parent instanceof JTree) {
            parent.cellRenderer = node
        else if (parent instanceof JList) {
            parent.cellRenderer = node

class RendererUpdateFactory extends AbstractFactory {

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) {
        return Collections.emptyMap()

    public boolean isHandlesNodeChildren() {
        return true;

    public boolean onNodeChildren(FactoryBuilderSupport builder, Object node, Closure childContent) {
        builder.parentContext.updateClosure = childContent
        return false

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