1 files changed, 109 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictReader.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictReader.java
new file mode 100644
index 000000000..57a583228
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictReader.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2013 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.inputmethod.latin.makedict;
+
+import com.android.inputmethod.annotations.UsedForTesting;
+import com.android.inputmethod.latin.makedict.BinaryDictInputOutput.FusionDictionaryBufferInterface;
+import com.android.inputmethod.latin.utils.ByteArrayWrapper;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+
+public class BinaryDictReader {
+
+    public interface FusionDictionaryBufferFactory {
+        public FusionDictionaryBufferInterface getFusionDictionaryBuffer(final File file)
+                throws FileNotFoundException, IOException;
+    }
+
+    /**
+     * Creates FusionDictionaryBuffer from a ByteBuffer
+     */
+    public static final class FusionDictionaryBufferFromByteBufferFactory
+            implements FusionDictionaryBufferFactory {
+        @Override
+        public FusionDictionaryBufferInterface getFusionDictionaryBuffer(final File file)
+                throws FileNotFoundException, IOException {
+            FileInputStream inStream = null;
+            ByteBuffer buffer = null;
+            try {
+                inStream = new FileInputStream(file);
+                buffer = inStream.getChannel().map(FileChannel.MapMode.READ_ONLY,
+                        0, file.length());
+            } finally {
+                if (inStream != null) {
+                    inStream.close();
+                }
+            }
+            if (buffer != null) {
+                return new BinaryDictInputOutput.ByteBufferWrapper(buffer);
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Creates FusionDictionaryBuffer from a byte array
+     */
+    public static final class FusionDictionaryBufferFromByteArrayFactory
+            implements FusionDictionaryBufferFactory {
+        @Override
+        public FusionDictionaryBufferInterface getFusionDictionaryBuffer(final File file)
+                throws FileNotFoundException, IOException {
+            FileInputStream inStream = null;
+            try {
+                inStream = new FileInputStream(file);
+                final byte[] array = new byte[(int) file.length()];
+                inStream.read(array);
+                return new ByteArrayWrapper(array);
+            } finally {
+                if (inStream != null) {
+                    inStream.close();
+                }
+            }
+        }
+    }
+
+    private final File mDictionaryBinaryFile;
+    private FusionDictionaryBufferInterface mFusionDictionaryBuffer;
+
+    public BinaryDictReader(final File file) {
+        mDictionaryBinaryFile = file;
+        mFusionDictionaryBuffer = null;
+    }
+
+    public void openBuffer(final FusionDictionaryBufferFactory factory)
+            throws FileNotFoundException, IOException {
+        mFusionDictionaryBuffer = factory.getFusionDictionaryBuffer(mDictionaryBinaryFile);
+    }
+
+    public FusionDictionaryBufferInterface getBuffer() {
+        return mFusionDictionaryBuffer;
+    }
+
+    @UsedForTesting
+    public FusionDictionaryBufferInterface openAndGetBuffer(
+            final FusionDictionaryBufferFactory factory)
+                    throws FileNotFoundException, IOException {
+        openBuffer(factory);
+        return getBuffer();
+    }
+}