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hrmsEjb/net/sf/jasperreports/engine/util/JRImageLoader.java

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+package net.sf.jasperreports.engine.util;
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLStreamHandlerFactory;
+import net.sf.jasperreports.engine.JRException;
+import net.sf.jasperreports.engine.JRRuntimeException;
+
+public class JRImageLoader {
+  public static final String PROPERTY_IMAGE_READER = "net.sf.jasperreports.image.reader";
+  
+  public static final String PROPERTY_IMAGE_ENCODER = "net.sf.jasperreports.image.encoder";
+  
+  public static final byte NO_IMAGE = 1;
+  
+  public static final byte SUBREPORT_IMAGE = 2;
+  
+  public static final byte CHART_IMAGE = 3;
+  
+  public static final byte CROSSTAB_IMAGE = 4;
+  
+  private static final String str_NO_IMAGE = "net/sf/jasperreports/engine/images/noimage.GIF";
+  
+  private static final String str_SUBREPORT_IMAGE = "net/sf/jasperreports/engine/images/subreport.GIF";
+  
+  private static final String str_CHART_IMAGE = "net/sf/jasperreports/engine/images/chart.GIF";
+  
+  private static final String str_CROSSTAB_IMAGE = "net/sf/jasperreports/engine/images/crosstab.GIF";
+  
+  private static Image img_NO_IMAGE = null;
+  
+  private static Image img_SUBREPORT_IMAGE = null;
+  
+  private static Image img_CHART_IMAGE = null;
+  
+  private static Image img_CROSSTAB_IMAGE = null;
+  
+  private static JRImageReader imageReader = null;
+  
+  private static JRImageEncoder imageEncoder = null;
+  
+  static {
+    String readerClassName = JRProperties.getProperty("net.sf.jasperreports.image.reader");
+    if (readerClassName == null) {
+      imageReader = new JRJdk14ImageReader();
+    } else {
+      try {
+        Class clazz = JRClassLoader.loadClassForRealName(readerClassName);
+        imageReader = clazz.newInstance();
+      } catch (Exception e) {
+        throw new JRRuntimeException(e);
+      } 
+    } 
+    String encoderClassName = JRProperties.getProperty("net.sf.jasperreports.image.encoder");
+    if (encoderClassName == null) {
+      imageEncoder = new JRJdk14ImageEncoder();
+    } else {
+      try {
+        Class clazz = JRClassLoader.loadClassForRealName(encoderClassName);
+        imageEncoder = clazz.newInstance();
+      } catch (Exception e) {
+        throw new JRRuntimeException(e);
+      } 
+    } 
+  }
+  
+  public static byte[] loadImageDataFromFile(File file) throws JRException {
+    return JRLoader.loadBytes(file);
+  }
+  
+  public static byte[] loadImageDataFromURL(URL url) throws JRException {
+    return JRLoader.loadBytes(url);
+  }
+  
+  public static byte[] loadImageDataFromInputStream(InputStream is) throws JRException {
+    return JRLoader.loadBytes(is);
+  }
+  
+  public static byte[] loadImageDataFromLocation(String location) throws JRException {
+    return JRLoader.loadBytesFromLocation(location);
+  }
+  
+  public static byte[] loadImageDataFromLocation(String location, ClassLoader classLoader) throws JRException {
+    return JRLoader.loadBytesFromLocation(location, classLoader);
+  }
+  
+  public static byte[] loadImageDataFromLocation(String location, ClassLoader classLoader, URLStreamHandlerFactory urlHandlerFactory) throws JRException {
+    return JRLoader.loadBytesFromLocation(location, classLoader, urlHandlerFactory);
+  }
+  
+  public static byte[] loadImageDataFromAWTImage(Image image, byte imageType) throws JRException {
+    return imageEncoder.encode(image, imageType);
+  }
+  
+  public static byte[] loadImageDataFromAWTImage(BufferedImage bi) throws JRException {
+    return loadImageDataFromAWTImage(bi, (byte)2);
+  }
+  
+  public static byte[] loadImageDataFromAWTImage(Image image) throws JRException {
+    return loadImageDataFromAWTImage(image, (byte)2);
+  }
+  
+  public static Image getImage(byte index) throws JRException {
+    Image image = null;
+    switch (index) {
+      case 1:
+        if (img_NO_IMAGE == null)
+          img_NO_IMAGE = loadImage("net/sf/jasperreports/engine/images/noimage.GIF"); 
+        image = img_NO_IMAGE;
+        break;
+      case 2:
+        if (img_SUBREPORT_IMAGE == null)
+          img_SUBREPORT_IMAGE = loadImage("net/sf/jasperreports/engine/images/subreport.GIF"); 
+        image = img_SUBREPORT_IMAGE;
+        break;
+      case 3:
+        if (img_CHART_IMAGE == null)
+          img_CHART_IMAGE = loadImage("net/sf/jasperreports/engine/images/chart.GIF"); 
+        image = img_CHART_IMAGE;
+        break;
+      case 4:
+        if (img_CROSSTAB_IMAGE == null)
+          img_CROSSTAB_IMAGE = loadImage("net/sf/jasperreports/engine/images/crosstab.GIF"); 
+        image = img_CROSSTAB_IMAGE;
+        break;
+    } 
+    return image;
+  }
+  
+  public static Image loadImage(byte[] bytes) throws JRException {
+    return imageReader.readImage(bytes);
+  }
+  
+  protected static Image loadImage(String image) throws JRException {
+    InputStream is;
+    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+    URL url = classLoader.getResource(image);
+    if (url == null)
+      classLoader = JRImageLoader.class.getClassLoader(); 
+    if (classLoader == null) {
+      is = JRImageLoader.class.getResourceAsStream("/" + image);
+    } else {
+      is = classLoader.getResourceAsStream(image);
+    } 
+    return imageReader.readImage(JRLoader.loadBytes(is));
+  }
+}