01: /*
02: * Copyright 2006-2007 The Scriptella Project Team.
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 scriptella.spi;
17:
18: /**
19: * Callback interface to obtain parameter values.
20: *
21: * @author Fyodor Kupolov
22: * @version 1.0
23: */
24: public interface ParametersCallback {
25: /**
26: * Returns the value of parameter specified by name.
27: * <p>The callback internally delegates a call to parent callbacks if the parameter cannot be found.
28: *
29: * @param name parameter name. Providers are allowed (but not required) to ignore a case of the name parameter
30: * to comply with their internal model. For example JDBC drivers are case-insensitive to column names.
31: * @return parameter value or null if parameter doesn't exist.
32: */
33: Object getParameter(final String name);
34: }
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