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Java > Open Source Codes > org > jnp > interfaces > MarshalledValuePair


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
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7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
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12   * This software is distributed in the hope that it will be useful,
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14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jnp.interfaces;
23
24 import java.io.IOException JavaDoc;
25 import java.io.Serializable JavaDoc;
26 import java.rmi.MarshalledObject JavaDoc;
27
28 /** An encapsulation of a JNDI binding as both the raw object and its
29  MarshalledObject form. When accessed in the same VM as the JNP server,
30  the raw object reference is used to avoid deserialization.
31
32  @author Scott.Stark@jboss.org
33  @version $Revision: 37459 $
34  */
35 public class MarshalledValuePair implements Serializable JavaDoc
36 {
37    /** @since 3.2.0 */
38    private static final long serialVersionUID = -3403843515711139134L;
39
40    private static boolean enableCallByReference = true;
41    public MarshalledObject JavaDoc marshalledValue;
42    public transient Object JavaDoc value;
43
44    /** Get the lookp call by reference flag.
45     * @return false if all lookups are unmarshalled using the caller's TCL,
46     * true if in VM lookups return the value by reference.
47     */
48    public static boolean getEnableCallByReference()
49    {
50       return enableCallByReference;
51    }
52    /** Set the lookp call by reference flag.
53     * @param flag - false if all lookups are unmarshalled using the caller's TCL,
54     * true if in VM lookups return the value by reference.
55     */
56    public static void setEnableCallByReference(boolean flag)
57    {
58       enableCallByReference = flag;
59    }
60
61    /** Creates a new instance of MashalledValuePair */
62    public MarshalledValuePair(Object JavaDoc value) throws IOException JavaDoc
63    {
64       this.value = value;
65       this.marshalledValue = new MarshalledObject JavaDoc(value);
66    }
67
68    public Object JavaDoc get() throws ClassNotFoundException JavaDoc, IOException JavaDoc
69    {
70       Object JavaDoc theValue = enableCallByReference ? value : null;
71       if( theValue == null && marshalledValue != null )
72          theValue = marshalledValue.get();
73       return theValue;
74    }
75 }
76
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