Initial Contribution
diff --git a/awt/javax/imageio/stream/FileCacheImageInputStream.java b/awt/javax/imageio/stream/FileCacheImageInputStream.java
new file mode 100644
index 0000000..47bc189
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+++ b/awt/javax/imageio/stream/FileCacheImageInputStream.java
@@ -0,0 +1,131 @@
+/*
+ * 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.*;
+
+/**
+ * The FileCacheImageInputStream class is an implementation of
+ * ImageInputStream which reads from its InputStream
+ * and uses a temporary file as a cache.
+ */
+public class FileCacheImageInputStream extends ImageInputStreamImpl {
+
+ /** The is. */
+ private InputStream is;
+
+ /** The file. */
+ private File file;
+
+ /** The raf. */
+ private RandomAccessFile raf;
+
+
+ /**
+ * Instantiates a new FileCacheImageInputStream from
+ * the specified InputStream and using the specified
+ * File as its cache directory.
+ *
+ * @param stream the InputStream for reading.
+ * @param cacheDir the cache directory where the chache file
+ * will be created.
+ *
+ * @throws IOException Signals that an I/O exception has occurred.
+ */
+ public FileCacheImageInputStream(InputStream stream, File cacheDir) throws IOException {
+ if (stream == null) {
+ throw new IllegalArgumentException("stream == null!");
+ }
+ is = stream;
+
+ if (cacheDir == null || cacheDir.isDirectory()) {
+ file = File.createTempFile(FileCacheImageOutputStream.IIO_TEMP_FILE_PREFIX, null, cacheDir);
+ file.deleteOnExit();
+ } else {
+ throw new IllegalArgumentException("Not a directory!");
+ }
+
+ raf = new RandomAccessFile(file, "rw");
+ }
+
+ @Override
+ public int read() throws IOException {
+ bitOffset = 0;
+
+ if (streamPos >= raf.length()) {
+ int b = is.read();
+
+ if (b < 0) {
+ return -1;
+ }
+
+ raf.seek(streamPos++);
+ raf.write(b);
+ return b;
+ }
+
+ raf.seek(streamPos++);
+ return raf.read();
+ }
+
+ @Override
+ public int read(byte[] b, int off, int len) throws IOException {
+ bitOffset = 0;
+
+ if (streamPos >= raf.length()) {
+ int nBytes = is.read(b, off, len);
+
+ if (nBytes < 0) {
+ return -1;
+ }
+
+ raf.seek(streamPos);
+ raf.write(b, off, nBytes);
+ streamPos += nBytes;
+ return nBytes;
+ }
+
+ raf.seek(streamPos);
+ int nBytes = raf.read(b, off, len);
+ streamPos += nBytes;
+ return nBytes;
+ }
+
+ @Override
+ public boolean isCached() {
+ return true;
+ }
+
+ @Override
+ public boolean isCachedFile() {
+ return true;
+ }
+
+ @Override
+ public boolean isCachedMemory() {
+ return false;
+ }
+
+ @Override
+ public void close() throws IOException {
+ super.close();
+ raf.close();
+ file.delete();
+ }
+}