01: // Copyright 2006 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.services;
16:
17: import org.apache.tapestry.MarkupWriter;
18:
19: /**
20: * Responsible for setup and cleanup of the rendering of a page. The implementation of this is based
21: * on an ordered list of {@link PageRenderCommand}s.
22: */
23: public interface PageRenderInitializer {
24: /**
25: * Perform any initial setup, by invoking {@link PageRenderCommand#setup(Environment)}.
26: * Execution occurs in normal order.
27: *
28: * @param writer
29: * the markup writer that will be used to generate all output markup
30: */
31: void setup(MarkupWriter writer);
32:
33: /**
34: * Peform any post-render cleanup, by invoking {@link PageRenderCommand#cleanup(Environment)}.
35: * Execution order is reversed.
36: *
37: * @param writer
38: * the markup writer used to generate all output markup in the document
39: */
40: void cleanup(MarkupWriter writer);
41: }
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