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1
28 package net.sf.jasperreports.engine.util;
29
30 import java.awt.Image  ;
31 import java.awt.image.BufferedImage ;
32 import java.io.File ;
33 import java.io.InputStream ;
34 import java.net.URL ;
35 import java.net.URLStreamHandlerFactory ;
36
37 import net.sf.jasperreports.engine.JRException;
38 import net.sf.jasperreports.engine.JRRenderable;
39
40
41
45 public class JRImageLoader
46 {
47
48
49
52 public static final byte NO_IMAGE = 1;
53 public static final byte SUBREPORT_IMAGE = 2;
54 public static final byte CHART_IMAGE = 3;
55 public static final byte CROSSTAB_IMAGE = 4;
56
57 private static final String str_NO_IMAGE = "net/sf/jasperreports/engine/images/noimage.GIF";
58 private static final String str_SUBREPORT_IMAGE = "net/sf/jasperreports/engine/images/subreport.GIF";
59 private static final String str_CHART_IMAGE = "net/sf/jasperreports/engine/images/chart.GIF";
60 private static final String str_CROSSTAB_IMAGE = "net/sf/jasperreports/engine/images/crosstab.GIF";
61 private static Image img_NO_IMAGE = null;
62 private static Image img_SUBREPORT_IMAGE = null;
63 private static Image img_CHART_IMAGE = null;
64 private static Image img_CROSSTAB_IMAGE = null;
65
66
69 private static JRImageReader imageReader = null;
70 private static JRImageEncoder imageEncoder = null;
71
72
73 static
74 {
75 try
76 {
77 JRClassLoader.loadClassForName("javax.imageio.ImageIO");
78
79 Class clazz = JRClassLoader.loadClassForName("net.sf.jasperreports.engine.util.JRJdk14ImageReader");
80 imageReader = (JRImageReader) clazz.newInstance();
81 }
82 catch (Exception e)
83 {
84 imageReader = new JRJdk13ImageReader();
85 }
86
87 try
88 {
89 JRClassLoader.loadClassForName("javax.imageio.ImageIO");
90
91 Class clazz = JRClassLoader.loadClassForName("net.sf.jasperreports.engine.util.JRJdk14ImageEncoder");
92 imageEncoder = (JRImageEncoder) clazz.newInstance();
93 }
94 catch (Exception e)
95 {
96 imageEncoder = new JRDefaultImageEncoder();
97 }
98 }
99
100
101
104 public static byte[] loadImageDataFromFile(File file) throws JRException
105 {
106 return JRLoader.loadBytes(file);
107 }
108
109
110
113 public static byte[] loadImageDataFromURL(URL url) throws JRException
114 {
115 return JRLoader.loadBytes(url);
116 }
117
118
119
122 public static byte[] loadImageDataFromInputStream(InputStream is) throws JRException
123 {
124 return JRLoader.loadBytes(is);
125 }
126
127
128
131 public static byte[] loadImageDataFromLocation(String location) throws JRException
132 {
133 return JRLoader.loadBytesFromLocation(location);
134 }
135
136
139 public static byte[] loadImageDataFromLocation(String location, ClassLoader classLoader) throws JRException
140 {
141 return JRLoader.loadBytesFromLocation(location, classLoader);
142 }
143
144
147 public static byte[] loadImageDataFromLocation(
148 String location,
149 ClassLoader classLoader,
150 URLStreamHandlerFactory urlHandlerFactory
151 ) throws JRException
152 {
153 return JRLoader.loadBytesFromLocation(location, classLoader, urlHandlerFactory);
154 }
155
156
157
164 public static byte[] loadImageDataFromAWTImage(Image image, byte imageType) throws JRException
165 {
166 return imageEncoder.encode(image, imageType);
167 }
168
169
170
175 public static byte[] loadImageDataFromAWTImage(BufferedImage bi) throws JRException
176 {
177 return loadImageDataFromAWTImage(bi, JRRenderable.IMAGE_TYPE_JPEG);
178 }
179
180
181
186 public static byte[] loadImageDataFromAWTImage(Image image) throws JRException
187 {
188 return loadImageDataFromAWTImage(image, JRRenderable.IMAGE_TYPE_JPEG);
189 }
190
191
192
195 public static Image getImage(byte index) throws JRException
196 {
197 Image image = null;
198
199 switch(index)
200 {
201 case NO_IMAGE:
202 {
203 if (img_NO_IMAGE == null)
204 {
205 img_NO_IMAGE = loadImage(str_NO_IMAGE);
206 }
207 image = img_NO_IMAGE;
208 break;
209 }
210 case SUBREPORT_IMAGE:
211 {
212 if (img_SUBREPORT_IMAGE == null)
213 {
214 img_SUBREPORT_IMAGE = loadImage(str_SUBREPORT_IMAGE);
215 }
216 image = img_SUBREPORT_IMAGE;
217 break;
218 }
219 case CHART_IMAGE:
220 {
221 if (img_CHART_IMAGE == null)
222 {
223 img_CHART_IMAGE = loadImage(str_CHART_IMAGE);
224 }
225 image = img_CHART_IMAGE;
226 break;
227 }
228 case CROSSTAB_IMAGE:
229 {
230 if (img_CROSSTAB_IMAGE == null)
231 {
232 img_CROSSTAB_IMAGE = loadImage(str_CROSSTAB_IMAGE);
233 }
234 image = img_CROSSTAB_IMAGE;
235 break;
236 }
237 }
238
239 return image;
240 }
241
242
243
246 public static Image loadImage(byte[] bytes) throws JRException
247 {
248 return imageReader.readImage(bytes);
249 }
250
251
252
258 protected static Image loadImage(String image) throws JRException
259 {
260 ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
261 URL url = classLoader.getResource(image);
262 if (url == null)
263 {
264 classLoader = JRImageLoader.class.getClassLoader();
271 }
272 InputStream is;
273 if (classLoader == null)
274 {
275 is = JRImageLoader.class.getResourceAsStream("/" + image);
276 }
277 else
278 {
279 is = classLoader.getResourceAsStream(image);
280 }
281
282 return imageReader.readImage(JRLoader.loadBytes(is));
283 }
284
285 }
286 |
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