01: /*
02: * Copyright 2002-2007 the original author or authors.
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.springframework.scripting;
18:
19: import java.io.IOException;
20:
21: /**
22: * Interface that defines the source of a script.
23: * Tracks whether the underlying script has been modified.
24: *
25: * @author Rob Harrop
26: * @author Juergen Hoeller
27: * @since 2.0
28: */
29: public interface ScriptSource {
30:
31: /**
32: * Retrieve the current script source text as String.
33: * @return the script text
34: * @throws IOException if script retrieval failed
35: */
36: String getScriptAsString() throws IOException;
37:
38: /**
39: * Indicate whether the underlying script data has been modified since
40: * the last time {@link #getScriptAsString()} was called.
41: * Returns <code>true</code> if the script has not been read yet.
42: * @return whether the script data has been modified
43: */
44: boolean isModified();
45:
46: }
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