Added OutputStream as svg sink

README.md

@@ -201,6 +201,13 @@ File file = QRCode.from("www.example.org").svg();
 File file = QRCode.from("www.example.com").withSize(250, 250).withColor(30, 90).svg();
 ```
 
+It's also possible to write svg to an `OutputStream` with terminal operation:
+
+```java
+OutputStream outs = // ...
+QRCode.from("www.example.org").svg(outs);
+```
+
 #### Android only
 
 On Android you have a special method `bitmap()` which returns a `android.graphics.Bitmap` without creating a `File` object before, so you can use the generated `android.graphics.Bitmap` immediately inside an `ImageView`:

javase/src/main/java/net/glxn/qrgen/javase/MatrixToSvgWriter.java

@@ -10,6 +10,8 @@
 import java.awt.*;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
 import java.nio.file.Path;
 
 class MatrixToSvgWriter {
@@ -44,6 +46,13 @@ private static SVGGraphics2D toSvgDocument(BitMatrix matrix, MatrixToImageConfig
 
     }
 
+    static void writeToStream(BitMatrix matrix, OutputStream outs, MatrixToImageConfig matrixToImageConfig) throws IOException {
+        SVGGraphics2D g2 = toSvgDocument(matrix, matrixToImageConfig);
+
+        OutputStreamWriter out = new OutputStreamWriter(outs);
+        g2.stream(out);
+    }
+
     static void writeToPath(BitMatrix matrix, Path file, MatrixToImageConfig matrixToImageConfig) throws IOException {
         SVGGraphics2D g2 = toSvgDocument(matrix, matrixToImageConfig);
 

javase/src/main/java/net/glxn/qrgen/javase/QRCode.java

@@ -172,6 +172,14 @@ public File svg(String name) {
         return file;
     }
 
+    public void svg(OutputStream outs) {
+        try {
+            MatrixToSvgWriter.writeToStream(createMatrix(text), outs, matrixToImageConfig);
+        } catch (Exception e) {
+            throw new QRGenerationException("Failed to create QR svg from text due to underlying exception", e);
+        }
+    }
+
     private File createTempSvgFile() throws IOException {
         return createTempSvgFile("QRCode");
     }

javase/src/test/java/net/glxn/qrgen/javase/QRCodeTest.java

@@ -230,13 +230,15 @@ public void shouldGetSvgFromText() {
         assertThat(file).canRead();
         assertThat(file.length()).isGreaterThan(0);
     }
+
     @Test
     public void shouldGetSvgWithSizeFromText() {
         File file = QRCode.from("www.example.com").withSize(250, 250).svg();
         assertThat(file).exists();
         assertThat(file).canRead();
         assertThat(file.length()).isGreaterThan(0);
     }
+
     @Test
     public void shouldGetSvgWithSizeAndColorFromText() {
         File file = QRCode.from("www.example.com").withSize(250, 250).withColor(30, 90).svg();
@@ -245,6 +247,36 @@ public void shouldGetSvgWithSizeAndColorFromText() {
         assertThat(file.length()).isGreaterThan(0);
     }
 
+    @Test
+    public void shouldGetSvgFromTextAsStream() {
+        ByteArrayOutputStream outs = new ByteArrayOutputStream();
+        QRCode.from("www.example.org").svg(outs);
+        byte[] data = outs.toByteArray();
+        assertThat(data).isNotEmpty();
+        assertThat(data).startsWith("<?xml".getBytes());
+        assertThat(data).endsWith("</svg\n>\n".getBytes());
+    }
+
+    @Test
+    public void shouldGetSvgWithSizeFromTextAsStream() {
+        ByteArrayOutputStream outs = new ByteArrayOutputStream();
+        QRCode.from("www.example.com").withSize(250, 250).svg(outs);
+        byte[] data = outs.toByteArray();
+        assertThat(data).isNotEmpty();
+        assertThat(data).startsWith("<?xml".getBytes());
+        assertThat(data).endsWith("</svg\n>\n".getBytes());
+    }
+
+    @Test
+    public void shouldGetSvgWithSizeAndColorFromTextAsStream() {
+        ByteArrayOutputStream outs = new ByteArrayOutputStream();
+        QRCode.from("www.example.com").withSize(250, 250).withColor(30, 90).svg(outs);
+        byte[] data = outs.toByteArray();
+        assertThat(data).isNotEmpty();
+        assertThat(data).startsWith("<?xml".getBytes());
+        assertThat(data).endsWith("</svg\n>\n".getBytes());
+    }
+
     @SuppressWarnings("unchecked")
     private void assertCapturedHint(Object expected, Object[] capture, EncodeHintType type) {
         Assert.assertEquals(expected, ((Map<EncodeHintType, ?>) capture[0]).get(type));