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Groovy example source code file (BoxLayoutFactory.groovy)

This example Groovy source code file (BoxLayoutFactory.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, boxlayout, boxlayout, boxlayoutfactory, container, container, gui, illegalaccessexception, instantiationexception, integer, integer, map, must, object, object, runtimeexception, swing

The Groovy BoxLayoutFactory.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.Container
import javax.swing.BoxLayout
import org.codehaus.groovy.runtime.InvokerHelper

public class BoxLayoutFactory extends AbstractFactory {

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) throws InstantiationException, IllegalAccessException {
        FactoryBuilderSupport.checkValueIsNull(value, name);
        Object parent = builder.getCurrent();
        if (parent instanceof Container) {
            Object axisObject = attributes.remove("axis");
            int axis = BoxLayout.X_AXIS;
            if (axisObject != null) {
                Integer i = (Integer) axisObject;
                axis = i.intValue();
            }

            Container target = LayoutFactory.getLayoutTarget(parent);
            BoxLayout answer = new BoxLayout(target, axis);

            // now let's try to set the layout property
            InvokerHelper.setProperty(target, "layout", answer);
            return answer;
        } else {
            throw new RuntimeException("Must be nested inside a Container");
        }
    }

    public void setParent(FactoryBuilderSupport builder, Object parent, Object child) {
        if (parent instanceof Container) {
            Container target = LayoutFactory.getLayoutTarget(parent);
            InvokerHelper.setProperty(target, "layout", child);
        }
    }

}

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