Groovy example source code file (ActionFactory.groovy)

This example Groovy source code file (ActionFactory.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, closure, closure, defaultaction, gui, instantiationexception, jcomponent, keystroke, keystroke, map, object, object, runtimeexception, string, string, swing

The Groovy ActionFactory.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 groovy.swing.impl.DefaultAction
import javax.swing.Action
import javax.swing.JComponent
import javax.swing.KeyStroke
import org.codehaus.groovy.runtime.InvokerHelper

/**
 *
 * @author Danno Ferrin
 */
public class ActionFactory extends AbstractFactory {

    public boolean isHandlesNodeChildren() {
        return true
    }

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) throws InstantiationException, IllegalAccessException {
        Action action
        if (FactoryBuilderSupport.checkValueIsTypeNotString(value, name, Action.class)) {
            action = (Action) value
        } else if (attributes.get(name) instanceof Action) {
            action = (Action) attributes.remove(name)
        } else {
            action = new DefaultAction()
        }
        return action
    }

    public boolean onHandleNodeAttributes( FactoryBuilderSupport builder, Object action,
            Map attributes)
    {
        if ((attributes.get("closure") instanceof Closure) && (action instanceof DefaultAction)){
            Closure closure = (Closure) attributes.remove("closure")
            ((DefaultAction)action).setClosure(closure)
        }

        Object accel = attributes.remove("accelerator")
        if (accel != null) {
            KeyStroke stroke = null
            if (accel instanceof KeyStroke) {
                stroke = (KeyStroke) accel
            } else {
                stroke = KeyStroke.getKeyStroke(accel.toString())
            }
            action.putValue(Action.ACCELERATOR_KEY, stroke)
        }

        Object mnemonic = attributes.remove("mnemonic")
        if (mnemonic != null) {
            if (!(mnemonic instanceof Number)) {
                mnemonic = mnemonic.toString().charAt(0)
            }
            action.putValue(Action.MNEMONIC_KEY, mnemonic as Integer)
        }
        
        for (entry in attributes.entrySet()) {
            String propertyName = (String) entry.getKey()
            // first attempt to set as a straight property
            try {
                InvokerHelper.setProperty(action, propertyName, entry.getValue())
            } catch (MissingPropertyException mpe) {
                // failing that store them in the action values list
                // typically standard Action names start with upper case, so lets upper case it
                propertyName = capitalize(propertyName)
                action.putValue(propertyName, entry.getValue())
            }

        }

        return false
    }

    public boolean onNodeChildren(FactoryBuilderSupport builder, Object node, Closure childContent) {
        if (!(node instanceof DefaultAction)) {
            throw new RuntimeException("$builder.currentName only accepts a closure content when the action is generated by the node")
        }
        if (node.closure != null) {
            throw new RuntimeException("$builder.currentName already has an action set via the closure attribute, child content as action not allowed")
        }
        node.closure = childContent
        return false
    }

    public void setParent(FactoryBuilderSupport builder, Object parent, Object action) {
        try {
            InvokerHelper.setProperty(parent, "action", action)
        } catch (RuntimeException re) {
            // must not have an action property...
            // so we ignore it and go on
        }
        Object keyStroke = action.getValue("KeyStroke")
        if (parent instanceof JComponent) {
            JComponent component = (JComponent) parent
            KeyStroke stroke = null
            if (keyStroke instanceof GString) keyStroke = keyStroke as String
            if (keyStroke instanceof String) {
                stroke = KeyStroke.getKeyStroke((String) keyStroke)
            } else if (keyStroke instanceof KeyStroke) {
                stroke = (KeyStroke) keyStroke
            }
            if (stroke != null) {
                String key = action.toString()
                component.getInputMap().put(stroke, key)
                component.getActionMap().put(key, action)
            }
        }
    }


    String capitalize(String text) {
        char ch = text.charAt(0)
        if (Character.isUpperCase(ch)) {
            return text
        }
        StringBuffer buffer = new StringBuffer(text.length())
        buffer.append(Character.toUpperCase(ch))
        buffer.append(text.substring(1))
        return buffer.toString()
    }

}