1/*
2 * Copyright (C) 2010 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.email.mail.store.imap;
18
19import com.android.email.FixedLengthInputStream;
20import com.android.emailcommon.Logging;
21import com.android.emailcommon.utility.Utility;
22import com.android.mail.utils.LogUtils;
23
24import java.io.ByteArrayInputStream;
25import java.io.IOException;
26import java.io.InputStream;
27
28/**
29 * Subclass of {@link ImapString} used for literals backed by an in-memory byte array.
30 */
31public class ImapMemoryLiteral extends ImapString {
32    private byte[] mData;
33
34    /* package */ ImapMemoryLiteral(FixedLengthInputStream in) throws IOException {
35        // We could use ByteArrayOutputStream and IOUtils.copy, but it'd perform an unnecessary
36        // copy....
37        mData = new byte[in.getLength()];
38        int pos = 0;
39        while (pos < mData.length) {
40            int read = in.read(mData, pos, mData.length - pos);
41            if (read < 0) {
42                break;
43            }
44            pos += read;
45        }
46        if (pos != mData.length) {
47            LogUtils.w(Logging.LOG_TAG, "");
48        }
49    }
50
51    @Override
52    public void destroy() {
53        mData = null;
54        super.destroy();
55    }
56
57    @Override
58    public String getString() {
59        return Utility.fromAscii(mData);
60    }
61
62    @Override
63    public InputStream getAsStream() {
64        return new ByteArrayInputStream(mData);
65    }
66
67    @Override
68    public String toString() {
69        return String.format("{%d byte literal(memory)}", mData.length);
70    }
71}
72