Add experimental support for reading BrotliDecode

With this commit all modified streams are written with `BrotliDecode`.

Author: Eswcvlad

pom.xml

@@ -78,7 +78,7 @@
     <dom4j.version>2.2.0</dom4j.version>
     <flatlaf.version>3.6.2</flatlaf.version>
     <icu4j.version>76.1</icu4j.version>
-    <itext.version>9.4.0</itext.version>
+    <itext.version>9.5.0-SNAPSHOT</itext.version>
     <jackson.version>2.20.1</jackson.version>
     <logback.version>1.5.21</logback.version>
 
@@ -117,6 +117,11 @@
       <artifactId>bouncy-castle-adapter</artifactId>
       <version>${itext.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.itextpdf</groupId>
+      <artifactId>brotli-compressor</artifactId>
+      <version>${itext.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.dom4j</groupId>
       <artifactId>dom4j</artifactId>

src/main/java/com/itextpdf/rups/model/PdfFile.java

@@ -42,11 +42,14 @@ This file is part of the iText (R) project.
  */
 package com.itextpdf.rups.model;
 
+import com.itextpdf.brotlicompressor.BrotliStreamCompressionStrategy;
 import com.itextpdf.kernel.exceptions.BadPasswordException;
+import com.itextpdf.kernel.pdf.IStreamCompressionStrategy;
 import com.itextpdf.kernel.pdf.PdfDocument;
 import com.itextpdf.kernel.pdf.PdfReader;
 import com.itextpdf.kernel.pdf.PdfWriter;
 import com.itextpdf.kernel.pdf.ReaderProperties;
+import com.itextpdf.kernel.pdf.StampingProperties;
 import com.itextpdf.rups.view.Language;
 
 import java.io.ByteArrayInputStream;
@@ -252,7 +255,7 @@ private boolean openDocumentReadWrite(byte[] password) throws IOException {
             );
             final ByteArrayOutputStream tempWriterOutputStream = new ByteArrayOutputStream();
             final PdfWriter writer = new PdfWriter(tempWriterOutputStream);
-            document = new PdfDocument(reader, writer);
+            document = new PdfDocument(reader, writer, createStampingProps());
             writerOutputStream = tempWriterOutputStream;
             return true;
         } catch (BadPasswordException e) {
@@ -293,4 +296,13 @@ private boolean openDocumentReadOnly(byte[] password) throws IOException {
             return false;
         }
     }
+
+    private static StampingProperties createStampingProps() {
+        final StampingProperties props = new StampingProperties();
+        props.registerDependency(
+                IStreamCompressionStrategy.class,
+                new BrotliStreamCompressionStrategy()
+        );
+        return props;
+    }
 }