Add enum class for different DataFlavors

src/main/java/me/goudham/util/Contents.java

@@ -0,0 +1,37 @@
+package me.goudham.util;
+
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.DataFlavor;
+
+public enum Contents {
+    STRING(DataFlavor.stringFlavor) {
+        @Override
+        public boolean isAvailable(Clipboard clipboard) {
+            return clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor);
+        }
+    },
+    IMAGE(DataFlavor.imageFlavor) {
+        @Override
+        public boolean isAvailable(Clipboard clipboard) {
+            return clipboard.isDataFlavorAvailable(DataFlavor.imageFlavor);
+        }
+    },
+    FILELIST(DataFlavor.javaFileListFlavor) {
+        @Override
+        public boolean isAvailable(Clipboard clipboard) {
+            return clipboard.isDataFlavorAvailable(DataFlavor.javaFileListFlavor);
+        }
+    };
+
+    private final DataFlavor dataFlavor;
+
+    Contents(DataFlavor dataFlavor) {
+       this.dataFlavor = dataFlavor;
+    }
+
+    public DataFlavor getDataFlavor() {
+        return dataFlavor;
+    }
+
+    public abstract boolean isAvailable(Clipboard clipboard);
+}