1/*
2 * Copyright (C) 2017 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
17package com.android.layout.remote.util;
18
19import com.android.layout.remote.util.RemoteInputStream.EndOfStreamException;
20import com.android.tools.layoutlib.annotations.NotNull;
21
22import java.io.IOException;
23import java.io.InputStream;
24import java.rmi.RemoteException;
25
26public class StreamUtil {
27    /**
28     * Returns a local {@link InputStream} from a {@link RemoteInputStream}
29     */
30    @NotNull
31    public static InputStream getInputStream(@NotNull RemoteInputStream is) {
32        return new InputStream() {
33            @Override
34            public int read() throws IOException {
35                return is.read();
36            }
37
38            @SuppressWarnings("NullableProblems")
39            @Override
40            public int read(byte[] b) throws IOException {
41                return read(b, 0, b.length);
42            }
43
44            @SuppressWarnings("NullableProblems")
45            @Override
46            public int read(byte[] b, int off, int len) throws IOException {
47                try {
48                    byte[] read = is.read(off, len);
49                    int actualLength = Math.min(len, read.length);
50                    System.arraycopy(read, 0, b, off, actualLength);
51                    return actualLength;
52                } catch (EndOfStreamException e) {
53                    return -1;
54                }
55            }
56
57            @Override
58            public long skip(long n) throws IOException {
59                return is.skip(n);
60            }
61
62            @Override
63            public int available() throws IOException {
64                return is.available();
65            }
66
67            @Override
68            public void close() throws IOException {
69                is.close();
70            }
71
72            @Override
73            public synchronized void mark(int readlimit) {
74                try {
75                    is.mark(readlimit);
76                } catch (RemoteException e) {
77                    throw new RuntimeException(e);
78                }
79            }
80
81            @Override
82            public synchronized void reset() throws IOException {
83                is.reset();
84            }
85
86            @Override
87            public boolean markSupported() {
88                try {
89                    return is.markSupported();
90                } catch (RemoteException e) {
91                    throw new RuntimeException(e);
92                }
93            }
94        };
95    }
96}
97