1 files changed, 67 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/util/InterruptableOutputStream.java b/src/com/android/gallery3d/util/InterruptableOutputStream.java
new file mode 100644
index 000000000..1ab62ab98
--- /dev/null
+++ b/src/com/android/gallery3d/util/InterruptableOutputStream.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2010 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.gallery3d.util;
+
+import com.android.gallery3d.common.Utils;
+
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.io.OutputStream;
+
+public class InterruptableOutputStream extends OutputStream {
+
+    private static final int MAX_WRITE_BYTES = 4096;
+
+    private OutputStream mOutputStream;
+    private volatile boolean mIsInterrupted = false;
+
+    public InterruptableOutputStream(OutputStream outputStream) {
+        mOutputStream = Utils.checkNotNull(outputStream);
+    }
+
+    @Override
+    public void write(int oneByte) throws IOException {
+        if (mIsInterrupted) throw new InterruptedIOException();
+        mOutputStream.write(oneByte);
+    }
+
+    @Override
+    public void write(byte[] buffer, int offset, int count) throws IOException {
+        int end = offset + count;
+        while (offset < end) {
+            if (mIsInterrupted) throw new InterruptedIOException();
+            int bytesCount = Math.min(MAX_WRITE_BYTES, end - offset);
+            mOutputStream.write(buffer, offset, bytesCount);
+            offset += bytesCount;
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        mOutputStream.close();
+    }
+
+    @Override
+    public void flush() throws IOException {
+        if (mIsInterrupted) throw new InterruptedIOException();
+        mOutputStream.flush();
+    }
+
+    public void interrupt() {
+        mIsInterrupted = true;
+    }
+}