Examples of groovy.lang.Closure

groovy.lang.Closure
Represents any closure object in Groovy.
Groovy allows instances of Closures to be called in a short form. For example:
```
 def a = 1 def c = {a} assert c() == 1 
```
To be able to use a Closure in this way with your own subclass, you need to provide a doCall method with any signature you want to. This ensures that {@link #getMaximumNumberOfParameters()} and {@link #getParameterTypes()} will work too without any additional code. If no doCall method is provided a closure must be used in its long form like
```
 def a = 1 def c = {a} assert c.call() == 1 
```
@author James Strachan @author John Wilson @author Jochen Theodorou @author Graeme Rocher @author Paul King @version $Revision: 22366 $


        //when starting via main set the look and feel to system
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 


        final Console console = new Console(Console.class.getClassLoader());
        console.setBeforeExecution(new Closure(null) {
          public void doCall() {
            console.setShell(new GroovyShell(Console.class.getClassLoader(), new Binding()) {
              public Object run(String scriptText, String fileName, String[] args) throws org.codehaus.groovy.control.CompilationFailedException {
                return super.run(IMPORTS + scriptText, fileName, args);
              };

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            } else if (dependency instanceof Task) {
                context.add(dependency);
            } else if (dependency instanceof TaskDependency) {
                context.add(dependency);
            } else if (dependency instanceof Closure) {
                Closure closure = (Closure) dependency;
                Object closureResult = closure.call(context.getTask());
                if (closureResult != null) {
                    queue.add(0, closureResult);
                }
            } else if (dependency instanceof Iterable) {
                Iterable<?> iterable = (Iterable) dependency;

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                    value = callable.call();
                } catch (Exception e) {
                    throw UncheckedException.asUncheckedException(e);
                }
            } else if (value instanceof Closure) {
                Closure closure = (Closure) value;
                value = closure.call();
            } else if (value instanceof FileCollection) {
                FileCollection fileCollection = (FileCollection) value;
                return fileCollection.getFiles();
            } else {
                return value;

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        assertThat(gradle.getProjectEvaluationBroadcaster(), sameInstance(broadcaster));
    }


    @Test
    public void broadcastsBeforeProjectEvaluateEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(ProjectEvaluationListener.class, "beforeEvaluate", closure);
        }});


        gradle.beforeProject(closure);

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        gradle.beforeProject(closure);
    }


    @Test
    public void broadcastsAfterProjectEvaluateEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(ProjectEvaluationListener.class, "afterEvaluate", closure);
        }});


        gradle.afterProject(closure);

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        gradle.afterProject(closure);
    }


    @Test
    public void broadcastsBuildStartedEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(BuildListener.class, "buildStarted", closure);
        }});


        gradle.buildStarted(closure);

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        gradle.buildStarted(closure);
    }


    @Test
    public void broadcastsSettingsEvaluatedEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(BuildListener.class, "settingsEvaluated", closure);
        }});


        gradle.settingsEvaluated(closure);

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        gradle.settingsEvaluated(closure);
    }


    @Test
    public void broadcastsProjectsLoadedEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(BuildListener.class, "projectsLoaded", closure);
        }});


        gradle.projectsLoaded(closure);

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        gradle.projectsLoaded(closure);
    }


    @Test
    public void broadcastsProjectsEvaluatedEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(BuildListener.class, "projectsEvaluated", closure);
        }});


        gradle.projectsEvaluated(closure);

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        gradle.projectsEvaluated(closure);
    }


    @Test
    public void broadcastsBuildFinishedEventsToClosures() {
        final Closure closure = HelperUtil.TEST_CLOSURE;
        context.checking(new Expectations() {{
            one(listenerManager).addListener(BuildListener.class, "buildFinished", closure);
        }});


        gradle.buildFinished(closure);

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