full example

Author: CatarinaGamboa

liquidjava-example/src/main/java/testSuite/classes/image_params_so_error/JpegExporter.java

@@ -1,7 +1,17 @@
 package testSuite.classes.image_params_so_error;
+import java.awt.image.RenderedImage;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.Locale;
 
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
 import javax.imageio.ImageWriteParam;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.ImageOutputStream;
+import java.util.Iterator;
 
 class JpegExporter {
 
@@ -14,4 +24,26 @@ ImageWriteParam setCompressionPreferences() {
         }
         return param;
     }
+
+    public String compressImage(File multipartFile, RenderedImage image) throws IOException {
+        String filePath = System.getProperty("java.io.tmpdir");
+        File compressedImageFile = new File(filePath);
+        OutputStream os = new FileOutputStream(compressedImageFile.getName());
+        String extension = multipartFile.getName().substring(multipartFile.getName().lastIndexOf('.') + 1);
+        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(extension);
+        ImageWriter writer = writers.next();
+
+        ImageOutputStream ios = ImageIO.createImageOutputStream(os);
+        writer.setOutput(ios);
+
+        ImageWriteParam param = writer.getDefaultWriteParam();
+        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); // State Refinement Error
+        param.setCompressionQuality(0.5f);
+        
+        writer.write(null, new IIOImage(image, null, null), param);
+        os.close();
+        ios.close();
+        writer.dispose();
+        return String.valueOf(compressedImageFile);
+    }
 }