Groovy example source code file (RichActionWidgetFactory.groovy)

This example Groovy source code file (RichActionWidgetFactory.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

action, action_args, class, class, constructor, constructor, failed, gui, icon, log, logging, object, object, reflection, richactionwidgetfactory, runtimeexception, string, string, swing

The Groovy RichActionWidgetFactory.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.lang.reflect.Constructor
import java.lang.reflect.InvocationTargetException
import java.util.logging.Level
import java.util.logging.Logger
import javax.swing.Action
import javax.swing.Icon

/**
 *
 * @author shemnon
 */
public class RichActionWidgetFactory extends AbstractFactory {
    static final Class[] ACTION_ARGS = [Action];
    static final Class[] ICON_ARGS = [Icon];
    static final Class[] STRING_ARGS = [String];

    final Constructor actionCtor;
    final Constructor iconCtor;
    final Constructor stringCtor;
    final Class klass;

    public RichActionWidgetFactory(Class klass) {
        try {
            actionCtor = klass.getConstructor(ACTION_ARGS);
            iconCtor = klass.getConstructor(ICON_ARGS);
            stringCtor = klass.getConstructor(STRING_ARGS);
            this.klass = klass;
        } catch (NoSuchMethodException ex) {
            Logger.getLogger("global").log(Level.INFO, null, ex);
        } catch (SecurityException ex) {
            Logger.getLogger("global").log(Level.SEVERE, null, ex);
        }
    }

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) throws InstantiationException, IllegalAccessException {
        try {
            if (value instanceof GString) value = value as String
            if (value == null) {
                return klass.newInstance();
            } else if (value instanceof Action) {
                return actionCtor.newInstance(value);
            } else if (value instanceof Icon) {
                return iconCtor.newInstance(value);
            } else if (value instanceof String) {
                return stringCtor.newInstance(value);
            } else if (klass.isAssignableFrom(value.getClass())) {
                return value;
            } else {
                throw new RuntimeException("$name can only have a value argument of type javax.swing.Action, javax.swing.Icon, java.lang.String, or $klass.name");
            }
        } catch (IllegalArgumentException e) {
            throw new RuntimeException("Failed to create component for '$name' reason: $e", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Failed to create component for '$name' reason: $e", e);
        }
    }

}