ABP/Android V8 integration code

src/org/adblockplus/android/JSEngine.java

+/*
+ * This file is part of the Adblock Plus,
+ * Copyright (C) 2006-2012 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.android;
+
+import java.io.IOException;
+import java.io.Reader;
+
+/**
+ * Wrapper for JS executor native code.
+ */
+public class JSEngine
+{
+  private long context;
+
+  public JSEngine(Object callback)
+  {
+    context = nativeInitialize(callback);
+  }
+
+  public void release()
+  {
+    nativeRelease(context);
+  }
+
+  public Object evaluate(String script)
+  {
+    if (script == null)
+      throw new IllegalArgumentException("empty script");
+    return nativeExecute(script, context);
+  }
+
+  public Object evaluate(Reader reader) throws IOException
+  {
+    return evaluate(readAll(reader));
+  }
+
+  private String readAll(Reader reader) throws IOException
+  {
+    StringBuilder sb = new StringBuilder();
+
+    char[] buffer = new char[8192];
+    int read;
+
+    while ((read = reader.read(buffer, 0, buffer.length)) > 0)
+    {
+      sb.append(buffer, 0, read);
+    }
+
+    return sb.toString();
+  }
+
+  public Object get(String name)
+  {
+    return nativeGet(name, context);
+  }
+
+  public void put(String name, Object value)
+  {
+    nativePut(name, value, context);
+  }
+
+  public long runCallbacks()
+  {
+    return nativeRunCallbacks(context);
+  }
+
+  public void callback(long callback, Object[] params)
+  {
+    nativeCallback(callback, params, context);
+  }
+
+  private native long nativeInitialize(Object callback);
+
+  private native void nativeRelease(long context);
+
+  private native Object nativeExecute(String script, long context);
+
+  private native Object nativeGet(String name, long context);
+
+  private native Object nativePut(String name, Object value, long context);
+
+  private native long nativeRunCallbacks(long context);
+
+  private native void nativeCallback(long callback, Object[] params, long context);
+
+  static
+  {
+    System.loadLibrary("jsEngine");
+  }
+}