01: /**
02: * ===========================================
03: * JFreeReport : a free Java reporting library
04: * ===========================================
05: *
06: * Project Info: http://reporting.pentaho.org/
07: *
08: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
09: *
10: * This library is free software; you can redistribute it and/or modify it under the terms
11: * of the GNU Lesser General Public License as published by the Free Software Foundation;
12: * either version 2.1 of the License, or (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16: * See the GNU Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public License along with this
19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20: * Boston, MA 02111-1307, USA.
21: *
22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
23: * in the United States and other countries.]
24: *
25: * ------------
26: * BandLayoutManagerSerializer.java
27: * ------------
28: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
29: */package org.jfree.report.util.serializers;
30:
31: import java.io.IOException;
32: import java.io.NotSerializableException;
33: import java.io.ObjectInputStream;
34: import java.io.ObjectOutputStream;
35:
36: import org.jfree.report.layout.BandLayoutManager;
37: import org.jfree.serializer.SerializeMethod;
38: import org.jfree.util.ObjectUtilities;
39:
40: /**
41: * A SerializeMethod implementation that handles BandLayoutManagers.
42: *
43: * @author Thomas Morgner
44: * @see org.jfree.report.layout.BandLayoutManager
45: */
46: public class BandLayoutManagerSerializer implements SerializeMethod {
47: /**
48: * Default Constructor.
49: */
50: public BandLayoutManagerSerializer() {
51: }
52:
53: /**
54: * Writes a serializable object description to the given object output stream. As
55: * bandlayoutmanagers need to be instantiable by their default constructor, it is
56: * sufficient to write the class of the layout manager.
57: *
58: * @param o the to be serialized object.
59: * @param out the outputstream that should receive the object.
60: * @throws IOException if an I/O error occured.
61: */
62: public void writeObject(final Object o, final ObjectOutputStream out)
63: throws IOException {
64: out.writeObject(o.getClass().getName());
65: }
66:
67: /**
68: * Reads the object from the object input stream. This will read a serialized class name
69: * of the BandLayoutManager. The specified class is then instantiated using its default
70: * constructor.
71: *
72: * @param in the object input stream from where to read the serialized data.
73: * @return the generated object.
74: *
75: * @throws IOException if reading the stream failed.
76: * @throws ClassNotFoundException if serialized object class cannot be found.
77: */
78: public Object readObject(final ObjectInputStream in)
79: throws IOException, ClassNotFoundException {
80: final String cn = (String) in.readObject();
81:
82: try {
83: return ObjectUtilities.loadAndInstantiate(cn,
84: BandLayoutManagerSerializer.class);
85: } catch (Exception e) {
86: throw new NotSerializableException(cn);
87: }
88: }
89:
90: /**
91: * The class of the object, which this object can serialize.
92: *
93: * @return the class <code>org.jfree.report.layout.BandLayoutManager</code>.
94: */
95: public Class getObjectClass() {
96: return BandLayoutManager.class;
97: }
98: }
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