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authorEric Erfanian <erfanian@google.com>2017-03-15 14:41:07 -0700
committerEric Erfanian <erfanian@google.com>2017-03-15 16:24:23 -0700
commitd5e47f6da5b08b13ecdfa7f1edc7e12aeb83fab9 (patch)
treeb54abbb51fb7d66e7755a1fbb5db023ff601090b /java/com/android/voicemail/impl/mail/PeekableInputStream.java
parent30436e7e6d3f2c8755a91b2b6222b74d465a9e87 (diff)
Update Dialer source from latest green build.
* Refactor voicemail component * Add new enriched calling components Test: treehugger, manual aosp testing Change-Id: I521a0f86327d4b42e14d93927c7d613044ed5942
Diffstat (limited to 'java/com/android/voicemail/impl/mail/PeekableInputStream.java')
-rw-r--r--java/com/android/voicemail/impl/mail/PeekableInputStream.java81
1 files changed, 81 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/mail/PeekableInputStream.java b/java/com/android/voicemail/impl/mail/PeekableInputStream.java
new file mode 100644
index 000000000..08f867f82
--- /dev/null
+++ b/java/com/android/voicemail/impl/mail/PeekableInputStream.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2015 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.voicemail.impl.mail;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * A filtering InputStream that allows single byte "peeks" without consuming the byte. The client of
+ * this stream can call peek() to see the next available byte in the stream and a subsequent read
+ * will still return the peeked byte.
+ */
+public class PeekableInputStream extends InputStream {
+ private final InputStream mIn;
+ private boolean mPeeked;
+ private int mPeekedByte;
+
+ public PeekableInputStream(InputStream in) {
+ this.mIn = in;
+ }
+
+ @Override
+ public int read() throws IOException {
+ if (!mPeeked) {
+ return mIn.read();
+ } else {
+ mPeeked = false;
+ return mPeekedByte;
+ }
+ }
+
+ public int peek() throws IOException {
+ if (!mPeeked) {
+ mPeekedByte = read();
+ mPeeked = true;
+ }
+ return mPeekedByte;
+ }
+
+ @Override
+ public int read(byte[] b, int offset, int length) throws IOException {
+ if (!mPeeked) {
+ return mIn.read(b, offset, length);
+ } else {
+ b[0] = (byte) mPeekedByte;
+ mPeeked = false;
+ int r = mIn.read(b, offset + 1, length - 1);
+ if (r == -1) {
+ return 1;
+ } else {
+ return r + 1;
+ }
+ }
+ }
+
+ @Override
+ public int read(byte[] b) throws IOException {
+ return read(b, 0, b.length);
+ }
+
+ @Override
+ public String toString() {
+ return String.format(
+ "PeekableInputStream(in=%s, peeked=%b, peekedByte=%d)",
+ mIn.toString(), mPeeked, mPeekedByte);
+ }
+}