Avoid using Guava's toByteArray

1 files changed, 27 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/mammoth/internal/util/Streams.java b/src/main/java/org/zwobble/mammoth/internal/util/Streams.java
new file mode 100644
index 0000000..ac0f165
--- /dev/null
+++ b/src/main/java/org/zwobble/mammoth/internal/util/Streams.java
@@ -0,0 +1,27 @@
+package org.zwobble.mammoth.internal.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class Streams {
+    private Streams() {}
+
+    public static void copy(InputStream source, OutputStream destination) throws IOException {
+        byte[] buffer = new byte[4096];
+        while (true) {
+            int bytesRead = source.read(buffer);
+            if (bytesRead == -1) {
+                return;
+            }
+            destination.write(buffer, 0, bytesRead);
+        }
+    }
+
+    public static byte[] toByteArray(InputStream stream) throws IOException {
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        copy(stream, output);
+        return output.toByteArray();
+    }
+}