Merge the dictionary pack in Latin IME.

Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172

1 files changed, 111 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/dictionarypack/MetadataParser.java b/java/src/com/android/inputmethod/dictionarypack/MetadataParser.java
new file mode 100644
index 000000000..27670fddf
--- /dev/null
+++ b/java/src/com/android/inputmethod/dictionarypack/MetadataParser.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2011 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.dictionarypack;
+
+import android.text.TextUtils;
+import android.util.JsonReader;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.TreeMap;
+
+/**
+ * Helper class containing functions to parse the dictionary metadata.
+ */
+public class MetadataParser {
+
+    // Name of the fields in the JSON-formatted file.
+    private static final String ID_FIELD_NAME = MetadataDbHelper.WORDLISTID_COLUMN;
+    private static final String LOCALE_FIELD_NAME = "locale";
+    private static final String DESCRIPTION_FIELD_NAME = MetadataDbHelper.DESCRIPTION_COLUMN;
+    private static final String UPDATE_FIELD_NAME = "update";
+    private static final String FILESIZE_FIELD_NAME = MetadataDbHelper.FILESIZE_COLUMN;
+    private static final String CHECKSUM_FIELD_NAME = MetadataDbHelper.CHECKSUM_COLUMN;
+    private static final String REMOTE_FILENAME_FIELD_NAME =
+            MetadataDbHelper.REMOTE_FILENAME_COLUMN;
+    private static final String VERSION_FIELD_NAME = MetadataDbHelper.VERSION_COLUMN;
+    private static final String FORMATVERSION_FIELD_NAME = MetadataDbHelper.FORMATVERSION_COLUMN;
+
+    /**
+     * Parse one JSON-formatted word list metadata.
+     * @param reader the reader containing the data.
+     * @return a WordListMetadata object from the parsed data.
+     * @throws IOException if the underlying reader throws IOException during reading.
+     */
+    private static WordListMetadata parseOneWordList(final JsonReader reader)
+            throws IOException, BadFormatException {
+        final TreeMap<String, String> arguments = new TreeMap<String, String>();
+        reader.beginObject();
+        while (reader.hasNext()) {
+            final String name = reader.nextName();
+            if (!TextUtils.isEmpty(name)) {
+                arguments.put(name, reader.nextString());
+            }
+        }
+        reader.endObject();
+        if (TextUtils.isEmpty(arguments.get(ID_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(LOCALE_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(DESCRIPTION_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(UPDATE_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(FILESIZE_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(CHECKSUM_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(REMOTE_FILENAME_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(VERSION_FIELD_NAME))
+                || TextUtils.isEmpty(arguments.get(FORMATVERSION_FIELD_NAME))) {
+            throw new BadFormatException(arguments.toString());
+        }
+        // TODO: need to find out whether it's bulk or update
+        // The null argument is the local file name, which is not known at this time and will
+        // be decided later.
+        return new WordListMetadata(
+                arguments.get(ID_FIELD_NAME),
+                MetadataDbHelper.TYPE_BULK,
+                arguments.get(DESCRIPTION_FIELD_NAME),
+                Long.parseLong(arguments.get(UPDATE_FIELD_NAME)),
+                Long.parseLong(arguments.get(FILESIZE_FIELD_NAME)),
+                arguments.get(CHECKSUM_FIELD_NAME),
+                null,
+                arguments.get(REMOTE_FILENAME_FIELD_NAME),
+                Integer.parseInt(arguments.get(VERSION_FIELD_NAME)),
+                Integer.parseInt(arguments.get(FORMATVERSION_FIELD_NAME)),
+                0, arguments.get(LOCALE_FIELD_NAME));
+    }
+
+    /**
+     * Parses metadata in the JSON format.
+     * @param input a stream reader expected to contain JSON formatted metadata.
+     * @return dictionary metadata, as an array of WordListMetadata objects.
+     * @throws IOException if the underlying reader throws IOException during reading.
+     * @throws BadFormatException if the data was not in the expected format.
+     */
+    public static List<WordListMetadata> parseMetadata(final InputStreamReader input)
+            throws IOException, BadFormatException {
+        JsonReader reader = new JsonReader(input);
+        final ArrayList<WordListMetadata> readInfo = new ArrayList<WordListMetadata>();
+        reader.beginArray();
+        while (reader.hasNext()) {
+            final WordListMetadata thisMetadata = parseOneWordList(reader);
+            if (!TextUtils.isEmpty(thisMetadata.mLocale))
+                readInfo.add(thisMetadata);
+        }
+        return Collections.unmodifiableList(readInfo);
+    }
+
+}