Some changes to IOBundle.java

src/main/java/me/retrodaredevil/io/IOBundle.java

@@ -3,6 +3,8 @@
 import java.io.InputStream;
 import java.io.OutputStream;
 
+import static java.util.Objects.requireNonNull;
+
 /**
  * Represents a {@link InputStream} and an {@link OutputStream}
  * <p>
@@ -15,12 +17,67 @@ public interface IOBundle extends AutoCloseable {
 
 	/**
 	 * This should be overridden by subclasses to close the input and output streams
-	 *
 	 * @throws Exception If this cannot be closed
 	 */
 	@Override
 	default void close() throws Exception {
-		getInputStream().close();
-		getOutputStream().close();
+	}
+
+	/**
+	 * NOTE: The {@link #close()} method will do nothing on the instance returned by this method
+	 * @param inputStream The {@link InputStream} to return in {@link #getInputStream()}
+	 * @param outputStream The {@link OutputStream} to return in {@link #getOutputStream()}
+	 * @return An immutable {@link IOBundle} representing {@code inputStream} and {@code outputStream}
+	 */
+	static IOBundle of(final InputStream inputStream, final OutputStream outputStream){
+		requireNonNull(inputStream);
+		requireNonNull(outputStream);
+		return new IOBundle() {
+			@Override
+			public InputStream getInputStream() {
+				return inputStream;
+			}
+
+			@Override
+			public OutputStream getOutputStream() {
+				return outputStream;
+			}
+		};
+	}
+
+	final class Defaults {
+		private Defaults(){ throw new UnsupportedOperationException(); }
+		/**
+		 * Represents an {@link IOBundle} that returns {@link System#in} and {@link System#out}
+		 * <p>
+		 * NOTE: Calling {@link #close()} does nothing.
+		 */
+		public static IOBundle STANDARD_IN_OUT = new IOBundle() {
+			@Override
+			public InputStream getInputStream() {
+				return System.in;
+			}
+
+			@Override
+			public OutputStream getOutputStream() {
+				return System.out;
+			}
+		};
+		/**
+		 * Represents an {@link IOBundle} that returns {@link System#in} and {@link System#err}
+		 * <p>
+		 * NOTE: Calling {@link #close()} does nothing.
+		 */
+		public static IOBundle STANDARD_IN_ERR = new IOBundle() {
+			@Override
+			public InputStream getInputStream() {
+				return System.in;
+			}
+
+			@Override
+			public OutputStream getOutputStream() {
+				return System.err;
+			}
+		};
 	}
 }