Issue 4231 - Fix unstable FilterEngineTest.testSetRemoveFilterChangeCallback

libadblockplus-android/src/org/adblockplus/libadblockplus/FileSystem.java

Index: libadblockplus-android/src/org/adblockplus/libadblockplus/FileSystem.java
diff --git a/libadblockplus-android/src/org/adblockplus/libadblockplus/FileSystem.java b/libadblockplus-android/src/org/adblockplus/libadblockplus/FileSystem.java
new file mode 100644
index 0000000000000000000000000000000000000000..edbea3d24018757b2adf78bc2b6c513f9e070852
--- /dev/null
+++ b/libadblockplus-android/src/org/adblockplus/libadblockplus/FileSystem.java
@@ -0,0 +1,110 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.libadblockplus;
+
+public abstract class FileSystem implements Disposable
+{
+    private final Disposer disposer;
+    protected final long ptr;
+
+    static
+    {
+        System.loadLibrary("adblockplus-jni");
+        registerNatives();
+    }
+
+    public FileSystem()
+    {
+        this.ptr = ctor(this);
+        this.disposer = new Disposer(this, new DisposeWrapper(this.ptr));
+    }
+
+    public static class StatResult
+    {
+        private boolean exists;
+
+        public boolean exists()
+        {
+            return exists;
+        }
+
+        private boolean isDirectory;
+
+        public boolean isDirectory()
+        {
+            return isDirectory;
+        }
+
+        private boolean isFile;
+
+        public boolean isFile()
+        {
+            return isFile;
+        }
+
+        private long lastModified;
+
+        public long getLastModified()
+        {
+            return lastModified;
+        }
+
+        public StatResult(boolean exists, boolean isDirectory, boolean isFile, long lastModified)
+        {
+            this.exists = exists;
+            this.isDirectory = isDirectory;
+            this.isFile = isFile;
+            this.lastModified = lastModified;
+        }
+    }
+
+    public abstract String read(String path);
+    public abstract void write(String path, String data);
+    public abstract void move(String fromPath, String toPath);
+    public abstract void remove(String path);
+    public abstract StatResult stat(String path);
+    public abstract String resolve(String path);
+
+    @Override
+    public void dispose()
+    {
+        this.disposer.dispose();
+    }
+
+    private final static class DisposeWrapper implements Disposable
+    {
+        private final long ptr;
+
+        public DisposeWrapper(final long ptr)
+        {
+            this.ptr = ptr;
+        }
+
+        @Override
+        public void dispose()
+        {
+            dtor(this.ptr);
+        }
+    }
+
+    private final static native void registerNatives();
+
+    private final static native long ctor(Object callbackObject);
+
+    private final static native void dtor(long ptr);
+}