01: /*
02: * Copyright 2006, 2007 Odysseus Software GmbH
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: package de.odysseus.el.tree;
17:
18: import java.io.Serializable;
19:
20: import javax.el.ELException;
21:
22: /**
23: * Tree builder interface.
24: * A tree builder can be used to create arbitrary many trees. Furthermore, a tree builder
25: * implementation must be thread-safe.
26: *
27: * @author Christoph Beck
28: */
29: public interface TreeBuilder extends Serializable {
30: /**
31: * Parse the given expression and create an abstract syntax tree for it.
32: * @param expression expression string
33: * @return tree corresponding to the given expression
34: * @throws ELException on parse error
35: */
36: public Tree build(String expression) throws ELException;
37: }
|