    001    // Copyright 2007, 2008 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5;
    016
    017    /**
    018     * A block is a collection of static text and elements, and components, derived from a component template. In the
    019     * template, a block is demarcated using the &lt;t:block&gt; or &lt;t:parameter&gt; elements. The interface defines no
    020     * methods, but the provided implementations of Block are capable of rendering their contents on demand.
    021     * <p/>
    022     * Tapestry includes coecions from String to {@link org.apache.tapestry5.Renderable} and {@link
    023     * org.apache.tapestry5.Renderable} to Block. This means that components that take Block parameters may be bound to
    024     * literal strings, to arbitrary numbers (or other objects, with the expectation that they will be converted to
    025     * strings), or to renderable objects such as components.
    026     */
    027    public interface Block
    028    {
    029
    030    }