Groovy example source code file (PropertyTest.java)

This example Groovy source code file (PropertyTest.java) 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

arraylist, awt, bob, dummybean, exception, exception, gui, hashmap, integer, james, list, list, node, node, object, object, swing, util

The Groovy PropertyTest.java source code

/*
 * Copyright 2003-2011 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 org.codehaus.groovy.runtime;

import groovy.lang.MissingMethodException;
import groovy.util.GroovySwingTestCase;
import groovy.util.Node;

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Test the property access of the Invoker class
 *
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @version $Revision: 21515 $
 */
public class PropertyTest extends GroovySwingTestCase {

    public void testMapProperties() throws Exception {
        Map map = new HashMap();
        map.put("foo", "abc");
        map.put("bar", new Integer(123));

        assertGetSetProperty(map, "foo", "abc", "def");
        assertGetSetProperty(map, "bar", new Integer(123), new Double(12.34));
    }

    public void testBeanProperties() throws Exception {
        DummyBean bean = new DummyBean();

        assertGetSetProperty(bean, "name", "James", "Bob");
        assertGetSetProperty(bean, "i", new Integer(123), new Integer(455));

        // dynamic properties
        assertGetSetProperty(bean, "dynamicFoo", null, "aValue");
        assertGetSetProperty(bean, "dynamicFoo", "aValue", "NewValue");
    }

    /**
     * todo this is no longer possible in new groovy
     * public void testUsingMethodProperty() throws Exception {
     * DummyBean bean = new DummyBean();
     * <p/>
     * assertGetSetProperty(bean, "name", "James", "Bob");
     * <p/>
     * Object value = InvokerHelper.getProperty(bean, "getName");
     * assertTrue("Should have returned a closure: " + value, value instanceof Closure);
     * Closure closure = (Closure) value;
     * Object result = closure.call(null);
     * assertEquals("Result of call to closure", "Bob", result);
     * }
     */


    public void testStaticProperty() throws Exception {
        Object value = InvokerHelper.getProperty(System.class, "out");
        assertEquals("static property out", System.out, value);
    }

    public void testClassProperty() throws Exception {
        Class c = String.class;
        Object value = InvokerHelper.getProperty(c, "name");
        assertEquals("class name property", c.getName(), value);
    }

    public void testMapEntryProperty() throws Exception {
        HashMap map = new HashMap();
        map.put("a", "x");
        Object[] array = map.entrySet().toArray();
        Object entry = array[0];

        Object key = InvokerHelper.getProperty(entry, "key");
        assertEquals("key property", "a", key);

        Object value = InvokerHelper.getProperty(entry, "value");
        assertEquals("value property", "x", value);
    }

    /**
     * todo this is no longer possible in new groovy
     * public void testMethodProperty() throws Exception {
     * Object value = InvokerHelper.getProperty(this, "getCheese");
     * assertTrue("Should have returned a closure: " + value, value instanceof Closure);
     * <p/>
     * Object result = ((Closure) value).call();
     * assertEquals("result of closure call", getCheese(), result);
     * <p/>
     * System.out.println("Closure: " + value + " and cheese: " + result);
     * }
     */

    public void testListCoercionProperty() throws Exception {
        DummyBean bean = new DummyBean();
        List list = new ArrayList();
        list.add(new Integer(10));
        list.add(new Integer(20));

        InvokerHelper.setProperty(bean, "point", list);
        assertEquals("Should have set a point", new Point(10, 20), bean.getPoint());
    }

    public void testListCoercionPropertyOnJFrame() throws Exception {
        if (isHeadless()) return;

        try {
            JFrame bean = new JFrame();
            List list = new ArrayList();
            list.add(new Integer(10));
            list.add(new Integer(20));

            InvokerHelper.setProperty(bean, "location", list);
            assertEquals("Should have set a point", new Point(10, 20), bean.getLocation());
        }
        catch (MissingMethodException e) {
            System.out.println("Failed with cause: " + e);
            e.printStackTrace();
            fail("Should not have throw: " + e);
        }
    }

    public void testListNavigationProperty() throws Exception {
        List list = new ArrayList();
        list.add(new DummyBean("James"));
        list.add(new DummyBean("Bob"));

        List value = (List) InvokerHelper.getProperty(list, "name");
        assertArrayEquals(new Object[]{"James", "Bob"}, value.toArray());
    }

    public void testListOfListNavigationProperty() throws Exception {
        List list = new ArrayList();
        list.add(new DummyBean("James"));
        list.add(new DummyBean("Bob"));

        List listOfList = new ArrayList();
        listOfList.add(list);

        List value = (List) InvokerHelper.getProperty(listOfList, "name");
        Object[] objects = value.toArray();
        List objectList = (List) objects[0];
        assertArrayEquals(new Object[]{"James", "Bob"}, objectList.toArray());
    }

    public void testNodeNavigationProperty() throws Exception {
        Node z = new Node(null, "z");
        Node y = new Node(null, "y");

        List children = new ArrayList();
        children.add(y);
        children.add(z);

        Node x = new Node(null, "x", children);

        children = new ArrayList();
        children.add(x);
        Node b = new Node(null, "b", children);

        // @todo should try with just a node as the child

        List value = (List) InvokerHelper.getProperty(b, "x");
        assertArrayEquals(new Object[]{x}, value.toArray());

        value = (List) InvokerHelper.getProperty(value, "z");
        assertArrayEquals(new Object[]{z}, value.toArray());
    }

    public void testUsingInPropertyOnProcessViaGroovyMethod() throws Exception {
        Process process = DefaultGroovyMethods.execute(System.getProperty("java.home") + "/bin/java -version");
        Object value = InvokerHelper.getProperty(process, "in");
        assertNotNull(value);

        System.out.println("Found in: " + value);

        process.destroy();
    }

    public Object getCheese() {
        return "cheddar";
    }

    public void testComponentParent() {
        if (isHeadless()) return;

        JPanel panel = new JPanel();
        JButton bean = new JButton();

        panel.add(bean);

        Object value = InvokerHelper.getProperty(bean, "parent");
        assertTrue(value != null);
    }

    // Implementation methods
    //-------------------------------------------------------------------------

    protected void assertGetSetProperty(Object object, String property, Object currentValue, Object newValue) {
        assertGetProperty(object, property, currentValue);

        InvokerHelper.setProperty(object, property, newValue);

        assertGetProperty(object, property, newValue);
    }

    protected void assertGetProperty(Object object, String property, Object expected) {
        Object value = InvokerHelper.getProperty(object, property);

        assertEquals("property: " + property + " of: " + object, expected, value);
    }
}