01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.portal.util;
18:
19: import java.util.Collections;
20: import java.util.Map;
21:
22: /**
23: * Field handler superclass for external references.
24: *
25: * @author <a href="mailto:bluetkemeier@s-und-n.de">Björn Lütkemeier</a>
26: *
27: * @version CVS $Id: ReferenceFieldHandler.java 433543 2006-08-22 06:22:54Z crossley $
28: */
29: public abstract class ReferenceFieldHandler extends
30: AbstractFieldHandler {
31: /**
32: * Used to pass resolvable objects to the field handler.
33: */
34: private static ThreadLocal threadLocalMap = new ThreadLocal();
35:
36: /**
37: * Gets the map used to pass resolvable objects to the field handler.
38: */
39: public static Map getObjectMap() {
40: Map map = (Map) threadLocalMap.get();
41: if (map == null) {
42: map = Collections.EMPTY_MAP;
43: }
44: return map;
45: }
46:
47: /**
48: * Sets the map used to pass resolvable objects to the field handler.
49: */
50: public static void setObjectMap(Map objectMap) {
51: threadLocalMap.set(objectMap);
52: }
53:
54: public static void clearObjectMap() {
55: threadLocalMap.set(null);
56: }
57: }
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