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: package org.apache.naming.factory;
18:
19: import java.util.Hashtable;
20:
21: import javax.naming.Context;
22: import javax.naming.Name;
23: import javax.naming.NamingException;
24: import javax.naming.RefAddr;
25: import javax.naming.Reference;
26: import javax.naming.spi.ObjectFactory;
27:
28: import org.apache.naming.ResourceLinkRef;
29:
30: /**
31: * <p>Object factory for resource links.</p>
32: *
33: * @author Remy Maucherat
34: * @version $Revision: 1.3 $ $Date: 2004/02/27 14:58:54 $
35: */
36:
37: public class ResourceLinkFactory implements ObjectFactory {
38:
39: // ----------------------------------------------------------- Constructors
40:
41: // ------------------------------------------------------- Static Variables
42:
43: /**
44: * Global naming context.
45: */
46: private static Context globalContext = null;
47:
48: // --------------------------------------------------------- Public Methods
49:
50: /**
51: * Set the global context (note: can only be used once).
52: *
53: * @param newGlobalContext new global context value
54: */
55: public static void setGlobalContext(Context newGlobalContext) {
56: if (globalContext != null)
57: return;
58: globalContext = newGlobalContext;
59: }
60:
61: // -------------------------------------------------- ObjectFactory Methods
62:
63: /**
64: * Create a new DataSource instance.
65: *
66: * @param obj The reference object describing the DataSource
67: */
68: public Object getObjectInstance(Object obj, Name name,
69: Context nameCtx, Hashtable environment)
70: throws NamingException {
71:
72: if (!(obj instanceof ResourceLinkRef))
73: return null;
74:
75: // Can we process this request?
76: Reference ref = (Reference) obj;
77:
78: String type = ref.getClassName();
79:
80: // Read the global ref addr
81: String globalName = null;
82: RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
83: if (refAddr != null) {
84: globalName = refAddr.getContent().toString();
85: Object result = null;
86: result = globalContext.lookup(globalName);
87: // FIXME: Check type
88: return result;
89: }
90:
91: return (null);
92:
93: }
94:
95: }
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