Groovy example source code file (WidgetFactory.groovy)

This example Groovy source code file (WidgetFactory.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

awt, class, component, illegalaccessexception, illegalaccessexception, instantiationexception, map, missingpropertyexception, object, object, runtimeexception, widgetfactory, widgetfactory, window, window

The Groovy WidgetFactory.groovy source code

/*
 * Copyright 2003-2007 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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package groovy.swing.factory

import java.awt.Component
import java.awt.Window

public class WidgetFactory extends AbstractFactory {

    final Class restrictedType;
    protected final boolean leaf

    public WidgetFactory(Class restrictedType, boolean leaf) {
        this.restrictedType = restrictedType
        this.leaf = leaf
    }

    boolean isLeaf() {
        return leaf
    }

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) throws InstantiationException, IllegalAccessException {
        if (value == null) {
            value = attributes.remove(name);
        }
        if ((value != null) && FactoryBuilderSupport.checkValueIsType(value, name, restrictedType)) {
            return value;
        } else {
            throw new RuntimeException("$name must have either a value argument or an attribute named $name that must be of type $restrictedType.name");
        }
    }

    public void setChild(FactoryBuilderSupport builder, Object parent, Object child) {
        if (!(child instanceof Component) || (child instanceof Window)) {
            return;
        }
        try {
            def constraints = builder.context.constraints
            if (constraints != null) {
                LayoutFactory.getLayoutTarget(parent).add(child, constraints)
                builder.context.remove('constraints')
            } else {
                LayoutFactory.getLayoutTarget(parent).add(child)
            }
        } catch (MissingPropertyException mpe) {
            LayoutFactory.getLayoutTarget(parent).add(child)
        }
    }

}