cordova-android/framework/src/com/phonegap/WebViewReflect.java

/*
       Licensed to the Apache Software Foundation (ASF) under one
       or more contributor license agreements.  See the NOTICE file
       distributed with this work for additional information
       regarding copyright ownership.  The ASF licenses this file
       to you 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.phonegap;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.webkit.WebSettings;

public class WebViewReflect {
	   private static Method mWebSettings_setDatabaseEnabled;
	   private static Method mWebSettings_setDatabasePath;
	   private static Method mWebSettings_setDomStorageEnabled;
	   private static Method mWebSettings_setGeolocationEnabled;
	   
	   static 
	   {
		   checkCompatibility();
	   }
	   
	   private static void setDatabaseEnabled(boolean e) throws IOException {
		   try
		   {
			   mWebSettings_setDatabaseEnabled.invoke(e);
		   }
		   catch (InvocationTargetException ite) {
	           /* unpack original exception when possible */
	           Throwable cause = ite.getCause();
	           if (cause instanceof IOException) {
	               throw (IOException) cause;
	           } else if (cause instanceof RuntimeException) {
	               throw (RuntimeException) cause;
	           } else if (cause instanceof Error) {
	               throw (Error) cause;
	           } else {
	               /* unexpected checked exception; wrap and re-throw */
	               throw new RuntimeException(ite);
	           }
	       } catch (IllegalAccessException ie) {
	           System.err.println("unexpected " + ie);
	       }	   
	   }	   
	   
	   
	   public static void checkCompatibility() {
	       try {
	           mWebSettings_setDatabaseEnabled = WebSettings.class.getMethod(
	                   "setDatabaseEnabled", new Class[] { boolean.class } );
	           mWebSettings_setDatabasePath = WebSettings.class.getMethod(
	        		   "setDatabasePath", new Class[] { String.class });
	           mWebSettings_setDomStorageEnabled = WebSettings.class.getMethod(
	        		   "setDomStorageEnabled", new Class[] { boolean.class });
	           mWebSettings_setGeolocationEnabled = WebSettings.class.getMethod(
	        		   "setGeolocationEnabled", new Class[] { boolean.class });
	           /* success, this is a newer device */
	       } catch (NoSuchMethodException nsme) {
	           /* failure, must be older device */
	       }
	   }

	   public static void setStorage(WebSettings setting, boolean enable, String path) {
	       if (mWebSettings_setDatabaseEnabled != null) {
	           /* feature is supported */
	    	   try {
				mWebSettings_setDatabaseEnabled.invoke(setting, enable);
				mWebSettings_setDatabasePath.invoke(setting, path);
	    	   } catch (IllegalArgumentException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	       } else {
	           /* feature not supported, do something else */
	       }
	   }
	   public static void setGeolocationEnabled(WebSettings setting, boolean enable) {
		   if (mWebSettings_setGeolocationEnabled != null) {
			   /* feature is supported */
			   try {
				mWebSettings_setGeolocationEnabled.invoke(setting, enable);
			} catch (IllegalArgumentException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		   } else {
			   /* feature not supported, do something else */
	           System.out.println("Native Geolocation not supported - we're ok");
		   }
	   }
	   public static void setDomStorage(WebSettings setting)
	   {
		   if(mWebSettings_setDomStorageEnabled != null)
		   {
			     /* feature is supported */
	    	   try {
	    		   mWebSettings_setDomStorageEnabled.invoke(setting, true);
			} catch (IllegalArgumentException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	       } else {
	           /* feature not supported, do something else */
	       }
			   
	   }
}