From 1dd585ff91b38fc3caf679c8df0bee9695e1ae09 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 3 Apr 2016 10:29:05 +0100
Subject: Rethrow unwrapped IOException in public methods

---
 .../internal/util/PassThroughException.java        | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/main/java/org/zwobble/mammoth/internal/util/PassThroughException.java

(limited to 'src/main/java/org/zwobble/mammoth/internal/util/PassThroughException.java')

diff --git a/src/main/java/org/zwobble/mammoth/internal/util/PassThroughException.java b/src/main/java/org/zwobble/mammoth/internal/util/PassThroughException.java
new file mode 100644
index 0000000..155490f
--- /dev/null
+++ b/src/main/java/org/zwobble/mammoth/internal/util/PassThroughException.java
@@ -0,0 +1,32 @@
+package org.zwobble.mammoth.internal.util;
+
+import java.io.IOException;
+
+public class PassThroughException extends RuntimeException {
+    public interface SupplierWithException<T, E extends Throwable> {
+        public T get() throws E;
+    }
+
+    public static <T> T wrap(SupplierWithException<T, IOException> supplier) {
+        try {
+            return supplier.get();
+        } catch (IOException exception) {
+            throw new PassThroughException(exception);
+        }
+    }
+
+    public static <T> T unwrap(SupplierWithException<T, IOException> supplier) throws IOException {
+        try {
+            return supplier.get();
+        } catch (PassThroughException exception) {
+            throw exception.exception;
+        }
+    }
+
+    private final IOException exception;
+
+    public PassThroughException(IOException exception) {
+        super(exception);
+        this.exception = exception;
+    }
+}
-- 
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