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