Merge the dictionary pack in Latin IME.

Bug: 8161354
Change-Id: I17c23f56dd3bc2f27726556bf2c5a9d5520bd172

1 files changed, 66 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/dictionarypack/AssetFileAddress.java b/java/src/com/android/inputmethod/dictionarypack/AssetFileAddress.java
new file mode 100644
index 000000000..bebb59fc0
--- /dev/null
+++ b/java/src/com/android/inputmethod/dictionarypack/AssetFileAddress.java
@@ -0,0 +1,66 @@
+/*
+ * 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 java.io.File;
+
+/**
+ * Immutable class to hold the address of an asset.
+ * As opposed to a normal file, an asset is usually represented as a contiguous byte array in
+ * the package file. Open it correctly thus requires the name of the package it is in, but
+ * also the offset in the file and the length of this data. This class encapsulates these three.
+ */
+final class AssetFileAddress {
+    public final String mFilename;
+    public final long mOffset;
+    public final long mLength;
+
+    public AssetFileAddress(final String filename, final long offset, final long length) {
+        mFilename = filename;
+        mOffset = offset;
+        mLength = length;
+    }
+
+    /**
+     * Makes an AssetFileAddress. This may return null.
+     *
+     * @param filename the filename.
+     * @return the address, or null if the file does not exist or the parameters are not valid.
+     */
+    public static AssetFileAddress makeFromFileName(final String filename) {
+        if (null == filename) return null;
+        final File f = new File(filename);
+        if (!f.isFile()) return null;
+        return new AssetFileAddress(filename, 0l, f.length());
+    }
+
+    /**
+     * Makes an AssetFileAddress. This may return null.
+     *
+     * @param filename the filename.
+     * @param offset the offset.
+     * @param length the length.
+     * @return the address, or null if the file does not exist or the parameters are not valid.
+     */
+    public static AssetFileAddress makeFromFileNameAndOffset(final String filename,
+            final long offset, final long length) {
+        if (null == filename) return null;
+        final File f = new File(filename);
+        if (!f.isFile()) return null;
+        return new AssetFileAddress(filename, offset, length);
+    }
+}