--- /dev/null
+// Copyright 2017 Reimar Döffinger
+//
+// 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.hughes.android.dictionary.engine;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.PipedInputStream;
+import java.io.PipedOutputStream;
+
+public class ReadAheadBuffer extends PipedInputStream {
+ static int BLOCK_SIZE = 1024 * 1024;
+ public ReadAheadBuffer(InputStream in, int size) {
+ super(size);
+ assert size >= 2 * BLOCK_SIZE;
+ this.in = in;
+ try {
+ pipe = new PipedOutputStream(this);
+ buffer = new byte[BLOCK_SIZE];
+ new Thread(new Runnable() {
+ public void run() {
+ int read;
+ try {
+ while ((read = in.read(buffer)) > 0)
+ {
+ pipe.write(buffer, 0, read);
+ pipe.flush();
+ }
+ } catch (IOException e) {}
+ try {
+ pipe.close();
+ } catch (IOException e) {}
+ }
+ }).start();
+ } catch (IOException e) {}
+ }
+
+ InputStream in;
+ PipedOutputStream pipe;
+ byte buffer[];
+}