Examples of org.apache.tapestry5.func.Flow

org.apache.tapestry5.services.ValidationMessagesSource
A flow is a a functional interface for working with an ordered collection of elements. A given Flow contains only elements of a particular type. Standard operations allow for filtering the flow, or appending elements to the Flow. Since flows are immutable, all operations on flows return new immutable flows. Flows are thread safe (to the extent that the {@link Mapper} , {@link Predicate}, {@link Worker} and {@link Reducer} objects applied to the flow are).Flows are lazy: filtering, mapping, and concatenating flows will do so with no, or a minimum, of evaluation. However, converting a Flow into a {@link List} (or other collection) willforce a realization of the entire flow.
In some cases, a flow may be an infinite, lazily evaluated sequence. Operations that iterate over all elements (such as {@link #count()} or {@link #reduce(Reducer,Object)}) may become infinite loops.
Using flows allows for a very fluid interface.
Flows are initially created using {@link F#flow(java.util.Collection)}, {@link F#flow(Object)} or{@link F#flow(Iterable)}. @since 5.2.0 @see F#lazy(LazyFunction)

{
    @Test
    public void response_sent() throws IOException
    {
        String encoding = "UTF-8";
        Response response = mockResponse();


        CharArrayWriter writer = new CharArrayWriter();
        PrintWriter pw = new PrintWriter(writer);


        expect(response.getPrintWriter("application/json;charset=UTF-8")).andReturn(pw);


        replay();


        JSONArray array = new JSONArray("   [ \"fred\", \"barney\" \n\n]");

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    }


    @Test
    public void unknown_validator_type()
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        ComponentResources resources = mockComponentResources();
        Messages containerMessages = mockMessages();

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    @SuppressWarnings("unchecked")
    @Test
    public void validator_with_no_constraint() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        Messages messages = mockMessages();
        MessageFormatter formatter = mockMessageFormatter();

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    @SuppressWarnings("unchecked")
    @Test
    public void component_messages_overrides_validator_messages() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        MessageFormatter formatter = mockMessageFormatter();
        Object inputValue = new Object();

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    }


    @Test
    public void component_messages_overrides_validator_messages_per_form() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        MessageFormatter formatter = mockMessageFormatter();
        Object inputValue = new Object();

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    @SuppressWarnings("unchecked")
    @Test
    public void constraint_value_from_message_catalog_per() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        Messages messages = mockMessages();
        MessageFormatter formatter = mockMessageFormatter();

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    @SuppressWarnings("unchecked")
    @Test
    public void constraint_value_from_message_catalog_per_form() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        Messages messages = mockMessages();
        MessageFormatter formatter = mockMessageFormatter();

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    @SuppressWarnings("unchecked")
    @Test
    public void missing_field_validator_constraint() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        ComponentResources resources = mockComponentResources();
        Messages containerMessages = mockMessages();

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    @SuppressWarnings("unchecked")
    @Test
    public void single_validator_via_specification() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator validator = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        Messages messages = mockMessages();
        MessageFormatter formatter = mockMessageFormatter();

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    @SuppressWarnings("unchecked")
    @Test
    public void multiple_validators_via_specification() throws Exception
    {
        ValidationMessagesSource messagesSource = mockValidationMessagesSource();
        Validator required = mockValidator();
        Validator minLength = mockValidator();
        TypeCoercer coercer = mockTypeCoercer();
        FieldComponent field = newFieldComponent();
        Messages messages = mockMessages();

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