01: /*
02: * Copyright 2002,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.apache.commons.jelly;
18:
19: /**
20: * <p><code>Script</code> represents a Jelly script.
21: * A Script <b>must</b> be thread safe so care should be taken on the
22: * implementations of Scripts. However Tags are only used in a single thread
23: * (each thread will have create its own Tags for the Script it is running)
24: * so multi threading is not a concern for Tag developers.</p>
25: *
26: * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
27: * @version $Revision: 155420 $
28: */
29: public interface Script {
30:
31: /** Called by the parser to allow a more efficient
32: * representation of the script to be used.
33: */
34: public Script compile() throws JellyException;
35:
36: /** Evaluates the body of a tag */
37: public void run(JellyContext context, XMLOutput output)
38: throws JellyTagException;
39:
40: }
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