DictionaryWriter to abstract binary dictionary writing.

UserHistoryDictionary should become to use ExpandableBinaryDictionary.

Bug: 6669677

Change-Id: I6831c7dd2d84207d1a8f51ba15d52e0a72205d0c

1 files changed, 78 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/AbstractDictionaryWriter.java b/java/src/com/android/inputmethod/latin/AbstractDictionaryWriter.java
new file mode 100644
index 000000000..ebbcedc96
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/AbstractDictionaryWriter.java
@@ -0,0 +1,78 @@
+/*
+ * 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;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+// TODO: Quit extending Dictionary after implementing dynamic binary dictionary.
+abstract public class AbstractDictionaryWriter extends Dictionary {
+    /** Used for Log actions from this class */
+    private static final String TAG = AbstractDictionaryWriter.class.getSimpleName();
+
+    private final Context mContext;
+
+    public AbstractDictionaryWriter(final Context context, final String dictType) {
+        super(dictType);
+        mContext = context;
+    }
+
+    abstract public void clear();
+
+    abstract public void addUnigramWord(final String word, final String shortcutTarget,
+            final int frequency, final boolean isNotAWord);
+
+    abstract public void addBigramWords(final String word0, final String word1,
+            final int frequency, final boolean isValid);
+
+    abstract public void removeBigramWords(final String word0, final String word1);
+
+    abstract protected void writeBinaryDictionary(final FileOutputStream out)
+            throws IOException, UnsupportedFormatException;
+
+    public void write(final String fileName) {
+        final String tempFileName = fileName + ".temp";
+        final File file = new File(mContext.getFilesDir(), fileName);
+        final File tempFile = new File(mContext.getFilesDir(), tempFileName);
+        FileOutputStream out = null;
+        try {
+            out = new FileOutputStream(tempFile);
+            writeBinaryDictionary(out);
+            out.flush();
+            out.close();
+            tempFile.renameTo(file);
+        } catch (IOException e) {
+            Log.e(TAG, "IO exception while writing file", e);
+        } catch (UnsupportedFormatException e) {
+            Log.e(TAG, "Unsupported format", e);
+        } finally {
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (IOException e) {
+                    // ignore
+                }
+            }
+        }
+    }
+}