summaryrefslogtreecommitdiffstats
path: root/awt/javax/imageio/stream/FileCacheImageOutputStream.java
diff options
context:
space:
mode:
Diffstat (limited to 'awt/javax/imageio/stream/FileCacheImageOutputStream.java')
-rw-r--r--awt/javax/imageio/stream/FileCacheImageOutputStream.java196
1 files changed, 0 insertions, 196 deletions
diff --git a/awt/javax/imageio/stream/FileCacheImageOutputStream.java b/awt/javax/imageio/stream/FileCacheImageOutputStream.java
deleted file mode 100644
index 135afab..0000000
--- a/awt/javax/imageio/stream/FileCacheImageOutputStream.java
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 javax.imageio.stream;
-
-import java.io.IOException;
-import java.io.File;
-import java.io.OutputStream;
-import java.io.RandomAccessFile;
-
-/**
- * The FileCacheImageOutputStream class is an implementation of
- * ImageOutputStream that writes to its OutputStream using a temporary file as a
- * cache.
- *
- * @since Android 1.0
- */
-public class FileCacheImageOutputStream extends ImageOutputStreamImpl {
-
- /**
- * The Constant IIO_TEMP_FILE_PREFIX.
- */
- static final String IIO_TEMP_FILE_PREFIX = "iioCache";
-
- /**
- * The Constant MAX_BUFFER_LEN.
- */
- static final int MAX_BUFFER_LEN = 1048575; // 1 MB - is it not too much?
-
- /**
- * The os.
- */
- private OutputStream os;
-
- /**
- * The file.
- */
- private File file;
-
- /**
- * The raf.
- */
- private RandomAccessFile raf;
-
- /**
- * Instantiates a FileCacheImageOutputStream.
- *
- * @param stream
- * the OutputStream for writing.
- * @param cacheDir
- * the cache directory where the cache file will be created.
- * @throws IOException
- * if an I/O exception has occurred.
- */
- public FileCacheImageOutputStream(OutputStream stream, File cacheDir) throws IOException {
- if (stream == null) {
- throw new IllegalArgumentException("stream == null!");
- }
- os = stream;
-
- if (cacheDir == null || cacheDir.isDirectory()) {
- file = File.createTempFile(IIO_TEMP_FILE_PREFIX, null, cacheDir);
- file.deleteOnExit();
- } else {
- throw new IllegalArgumentException("Not a directory!");
- }
-
- raf = new RandomAccessFile(file, "rw");
- }
-
- @Override
- public void close() throws IOException {
- flushBefore(raf.length());
- super.close();
- raf.close();
- file.delete();
- }
-
- @Override
- public boolean isCached() {
- return true;
- }
-
- @Override
- public boolean isCachedFile() {
- return true;
- }
-
- @Override
- public boolean isCachedMemory() {
- return false;
- }
-
- @Override
- public void write(int b) throws IOException {
- flushBits(); // See the flushBits method description
-
- raf.write(b);
- streamPos++;
- }
-
- @Override
- public void write(byte[] b, int off, int len) throws IOException {
- flushBits(); // See the flushBits method description
-
- raf.write(b, off, len);
- streamPos += len;
- }
-
- @Override
- public int read() throws IOException {
- bitOffset = 0; // Should reset
-
- int res = raf.read();
- if (res >= 0) {
- streamPos++;
- }
-
- return res;
- }
-
- @Override
- public int read(byte[] b, int off, int len) throws IOException {
- bitOffset = 0;
-
- int numRead = raf.read(b, off, len);
- if (numRead > 0) {
- streamPos += numRead;
- }
-
- return numRead;
- }
-
- @Override
- public void flushBefore(long pos) throws IOException {
- long readFromPos = flushedPos;
- super.flushBefore(pos);
-
- long bytesToRead = pos - readFromPos;
- raf.seek(readFromPos);
-
- if (bytesToRead < MAX_BUFFER_LEN) {
- byte buffer[] = new byte[(int)bytesToRead];
- raf.readFully(buffer);
- os.write(buffer);
- } else {
- byte buffer[] = new byte[MAX_BUFFER_LEN];
- while (bytesToRead > 0) {
- int count = (int)Math.min(MAX_BUFFER_LEN, bytesToRead);
- raf.readFully(buffer, 0, count);
- os.write(buffer, 0, count);
- bytesToRead -= count;
- }
- }
-
- os.flush();
-
- if (pos != streamPos) {
- raf.seek(streamPos); // Reset the position
- }
- }
-
- @Override
- public void seek(long pos) throws IOException {
- if (pos < flushedPos) {
- throw new IndexOutOfBoundsException();
- }
-
- raf.seek(pos);
- streamPos = raf.getFilePointer();
- bitOffset = 0;
- }
-
- @Override
- public long length() {
- try {
- return raf.length();
- } catch (IOException e) {
- return -1L;
- }
- }
-}