01: /*
02: * Copyright 1999-2004 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: * $Id: ExtensionsProvider.java,v 1.6 2004/02/17 04:30:02 minchau Exp $
18: */
19: package org.apache.xpath;
20:
21: import java.util.Vector;
22:
23: import org.apache.xpath.functions.FuncExtFunction;
24:
25: /**
26: * Interface that XPath objects can call to obtain access to an
27: * ExtensionsTable.
28: *
29: */
30: public interface ExtensionsProvider {
31: /**
32: * Is the extension function available?
33: */
34:
35: public boolean functionAvailable(String ns, String funcName)
36: throws javax.xml.transform.TransformerException;
37:
38: /**
39: * Is the extension element available?
40: */
41: public boolean elementAvailable(String ns, String elemName)
42: throws javax.xml.transform.TransformerException;
43:
44: /**
45: * Execute the extension function.
46: */
47: public Object extFunction(String ns, String funcName,
48: Vector argVec, Object methodKey)
49: throws javax.xml.transform.TransformerException;
50:
51: /**
52: * Execute the extension function.
53: */
54: public Object extFunction(FuncExtFunction extFunction, Vector argVec)
55: throws javax.xml.transform.TransformerException;
56: }
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