1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.tools.build.apkzlib.utils;
18 
19 import java.io.IOException;
20 import java.io.UncheckedIOException;
21 import java.util.function.Function;
22 import javax.annotation.Nonnull;
23 import javax.annotation.Nullable;
24 
25 /**
26  * Function that can throw an I/O Exception
27  */
28 @FunctionalInterface
29 public interface IOExceptionFunction<F, T> {
30 
31     /**
32      * Applies the function to the given input.
33      * @param input the input
34      * @return the function result
35      */
apply(@ullable F input)36     @Nullable T apply(@Nullable F input) throws IOException;
37 
38     /**
39      * Wraps a function that may throw an IO Exception throwing an {@code UncheckedIOException}.
40      *
41      * @param f the function
42      */
43     @Nonnull
asFunction(@onnull IOExceptionFunction<F, T> f)44     static <F, T> Function<F, T> asFunction(@Nonnull IOExceptionFunction<F, T> f)  {
45         return i -> {
46             try {
47                 return f.apply(i);
48             } catch (IOException e) {
49                 throw new UncheckedIOException(e);
50             }
51         };
52     }
53 }
54