001: /*
002: * Copyright (c) 2004 JETA Software, Inc. All rights reserved.
003: *
004: * Redistribution and use in source and binary forms, with or without modification,
005: * are permitted provided that the following conditions are met:
006: *
007: * o Redistributions of source code must retain the above copyright notice,
008: * this list of conditions and the following disclaimer.
009: *
010: * o Redistributions in binary form must reproduce the above copyright notice,
011: * this list of conditions and the following disclaimer in the documentation
012: * and/or other materials provided with the distribution.
013: *
014: * o Neither the name of JETA Software nor the names of its contributors may
015: * be used to endorse or promote products derived from this software without
016: * specific prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
021: * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
022: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
023: * INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
024: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
025: * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
026: * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
027: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
028: */
029:
030: package com.jeta.forms.store.memento;
031:
032: import java.io.BufferedInputStream;
033: import java.io.ByteArrayOutputStream;
034: import java.io.File;
035: import java.io.FileInputStream;
036: import java.io.IOException;
037:
038: import javax.swing.ImageIcon;
039:
040: import com.jeta.forms.store.AbstractJETAPersistable;
041: import com.jeta.forms.store.JETAObjectInput;
042: import com.jeta.forms.store.JETAObjectOutput;
043:
044: /**
045: * Represents a storable icon. This class takes the raw bytes from an image file
046: * and puts them in a byte array. It then serializes the byte array. We don't
047: * use ImageIcon because it does not guarantee compatibility with future JVMs.
048: *
049: * @author Jeff Tassin
050: */
051: public class IconMemento extends AbstractJETAPersistable implements
052: Cloneable {
053: static final long serialVersionUID = 7200914507339096976L;
054:
055: /**
056: * The version of this class
057: */
058: public static final int VERSION = 1;
059:
060: /**
061: * The bytes that make up an image file (PNG,JPG,GIF).
062: */
063: private byte[] m_image_bytes;
064:
065: /**
066: * the icon instance.
067: */
068: private transient ImageIcon m_icon;
069:
070: /**
071: * Creates an unitialized <code>IconMemento</code> instance.
072: */
073: public IconMemento() {
074: }
075:
076: /**
077: * Initializes this memento from an image file.
078: */
079: public IconMemento(File f) {
080: try {
081: ByteArrayOutputStream bos = new ByteArrayOutputStream();
082: FileInputStream fis = new FileInputStream(f);
083: BufferedInputStream bis = new BufferedInputStream(fis);
084: byte[] buff = new byte[1024];
085: int read = bis.read(buff);
086: while (read > 0) {
087: bos.write(buff, 0, read);
088: read = bis.read(buff);
089: }
090:
091: if (bos.size() > 0) {
092: m_image_bytes = bos.toByteArray();
093: }
094: } catch (Exception e) {
095: e.printStackTrace();
096: }
097: }
098:
099: /**
100: * Returns an image icon based on the image data in this memento.
101: *
102: * @return the image icon based on the image of this memento
103: */
104: public ImageIcon getImageIcon() {
105: if (m_icon == null && m_image_bytes != null)
106: m_icon = new ImageIcon(m_image_bytes);
107:
108: return m_icon;
109: }
110:
111: public boolean equals(Object obj) {
112: if (this == obj)
113: return true;
114:
115: if (null == obj)
116: return false;
117:
118: if (!(obj instanceof IconMemento))
119: return false;
120:
121: IconMemento iconMemento = (IconMemento) obj;
122:
123: if ((null == m_image_bytes && null != iconMemento.m_image_bytes)
124: || (null != m_image_bytes && null == iconMemento.m_image_bytes)
125: || (null != m_image_bytes
126: && null != iconMemento.m_image_bytes && (iconMemento.m_image_bytes.length != m_image_bytes.length))) {
127: return false;
128: } else {
129: for (int i = 0; i < m_image_bytes.length; i++) {
130: if (m_image_bytes[i] != iconMemento.m_image_bytes[i])
131: return false;
132: }
133: }
134: return true;
135: }
136:
137: public Object clone() {
138: IconMemento other = null;
139: try {
140: other = (IconMemento) super .clone();
141: //
142: other.m_image_bytes = m_image_bytes;
143: //
144: m_icon = null;
145: other.m_icon = getImageIcon();
146: m_icon = null;
147: getImageIcon();
148: } catch (CloneNotSupportedException e) {
149: // this shouldn't happen, since we are Cloneable
150: throw new InternalError();
151: }
152: //
153: return other;
154: }
155:
156: /**
157: * Externalizable Implementation
158: */
159: public void read(JETAObjectInput in) throws ClassNotFoundException,
160: IOException {
161: int version = in.readVersion();
162: m_image_bytes = (byte[]) in.readObject("imagebytes");
163: }
164:
165: /**
166: * Externalizable Implementation
167: */
168: public void write(JETAObjectOutput out) throws IOException {
169: out.writeVersion(VERSION);
170: out.writeObject("imagebytes", m_image_bytes);
171: }
172:
173: }
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