Initial Contribution

1 files changed, 130 insertions, 0 deletions

diff --git a/awt/javax/imageio/stream/MemoryCacheImageOutputStream.java b/awt/javax/imageio/stream/MemoryCacheImageOutputStream.java
new file mode 100644
index 0000000..96ded43
--- /dev/null
+++ b/awt/javax/imageio/stream/MemoryCacheImageOutputStream.java
@@ -0,0 +1,130 @@
+/*
+ *  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 org.apache.harmony.x.imageio.stream.RandomAccessMemoryCache;
+
+import java.io.OutputStream;
+import java.io.IOException;
+
+
+/**
+ * The MemoryCacheImageOutputStream class implements ImageOutputStream
+ * using a memory buffer for caching the data.
+ */
+public class MemoryCacheImageOutputStream extends ImageOutputStreamImpl {
+    
+    /** The os. */
+    OutputStream os;
+    
+    /** The ramc. */
+    RandomAccessMemoryCache ramc = new RandomAccessMemoryCache();
+
+    /**
+     * Instantiates a new MemoryCacheImageOutputStream
+     * which writes to the specified OutputStream.
+     * 
+     * @param stream the OutputStream.
+     */
+    public MemoryCacheImageOutputStream(OutputStream stream) {
+        if (stream == null) {
+            throw new IllegalArgumentException("stream == null!");
+        }
+        os = stream;
+    }
+
+    @Override
+    public void write(int b) throws IOException {
+        flushBits(); // See the flushBits method description
+
+        ramc.putData(b, streamPos);
+        streamPos++;
+    }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        flushBits(); // See the flushBits method description
+
+        ramc.putData(b, off, len, streamPos);
+        streamPos += len;
+    }
+
+    @Override
+    public int read() throws IOException {
+        bitOffset = 0;
+
+        int res = ramc.getData(streamPos);
+        if (res >= 0) {
+            streamPos++;
+        }
+        return res;
+    }
+
+    @Override
+    public int read(byte[] b, int off, int len) throws IOException {
+        bitOffset = 0;
+
+        int res = ramc.getData(b, off, len, streamPos);
+        if (res > 0) {
+            streamPos += res;
+        }
+        return res;
+    }
+
+    @Override
+    public long length() {
+        return ramc.length();
+    }
+
+    @Override
+    public boolean isCached() {
+        return true;
+    }
+
+    @Override
+    public boolean isCachedMemory() {
+        return true;
+    }
+
+    @Override
+    public boolean isCachedFile() {
+        return false;
+    }
+
+    @Override
+    public void close() throws IOException {
+        flushBefore(length());
+        super.close();
+        ramc.close();
+    }
+
+    @Override
+    public void flushBefore(long pos) throws IOException {
+        long flushedPosition = getFlushedPosition();
+        super.flushBefore(pos);
+
+        long newFlushedPosition = getFlushedPosition();
+        int nBytes = (int)(newFlushedPosition - flushedPosition);
+
+        ramc.getData(os, nBytes, flushedPosition);
+        ramc.freeBefore(newFlushedPosition);
+
+        os.flush();        
+    }
+}