1 files changed, 53 insertions, 0 deletions
diff --git a/src/main/java/com/android/tools/build/apkzlib/utils/IOExceptionFunction.java b/src/main/java/com/android/tools/build/apkzlib/utils/IOExceptionFunction.java
new file mode 100644
index 0000000..4ccce5f
--- /dev/null
+++ b/src/main/java/com/android/tools/build/apkzlib/utils/IOExceptionFunction.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.tools.build.apkzlib.utils;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.util.function.Function;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * Function that can throw an I/O Exception
+ */
+@FunctionalInterface
+public interface IOExceptionFunction<F, T> {
+
+    /**
+     * Applies the function to the given input.
+     * @param input the input
+     * @return the function result
+     */
+    @Nullable T apply(@Nullable F input) throws IOException;
+
+    /**
+     * Wraps a function that may throw an IO Exception throwing an {@code UncheckedIOException}.
+     *
+     * @param f the function
+     */
+    @Nonnull
+    static <F, T> Function<F, T> asFunction(@Nonnull IOExceptionFunction<F, T> f)  {
+        return i -> {
+            try {
+                return f.apply(i);
+            } catch (IOException e) {
+                throw new UncheckedIOException(e);
+            }
+        };
+    }
+}