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.phone.common.mail.store.imap;
18
19import com.android.phone.common.mail.FixedLengthInputStream;
20import com.android.phone.vvm.omtp.VvmLog;
21
22import java.io.ByteArrayInputStream;
23import java.io.IOException;
24import java.io.InputStream;
25import java.io.UnsupportedEncodingException;
26
27/**
28 * Subclass of {@link ImapString} used for literals backed by an in-memory byte array.
29 */
30public class ImapMemoryLiteral extends ImapString {
31    private final String TAG = "ImapMemoryLiteral";
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            VvmLog.w(TAG, "length mismatch");
48        }
49    }
50
51    @Override
52    public void destroy() {
53        mData = null;
54        super.destroy();
55    }
56
57    @Override
58    public String getString() {
59        try {
60            return new String(mData, "US-ASCII");
61        } catch (UnsupportedEncodingException e) {
62            VvmLog.e(TAG, "Unsupported encoding: ", e);
63        }
64        return null;
65    }
66
67    @Override
68    public InputStream getAsStream() {
69        return new ByteArrayInputStream(mData);
70    }
71
72    @Override
73    public String toString() {
74        return String.format("{%d byte literal(memory)}", mData.length);
75    }
76}