WebMessageManager.java

package cn.mutils.app.ui.web;

import android.content.Context;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import cn.mutils.core.json.JsonUtil;
import cn.mutils.core.log.Logs;

/**
 * Implements {@link IWebMessageManager}
 */
@SuppressWarnings({"rawtypes", "unchecked", "UnusedAssignment"})
public class WebMessageManager implements IWebMessageManager {

    protected List<Class<? extends IWebMessageDispatcher<?>>> mDispatchers;

    protected IWebFrame mWebFrame;

    @Override
    public Context getContext() {
        return mWebFrame == null ? null : mWebFrame.getContext();
    }

    @Override
    public void add(Class<? extends IWebMessageDispatcher<?>> dispatcherClass) {
        if (mDispatchers == null) {
            mDispatchers = new CopyOnWriteArrayList<Class<? extends IWebMessageDispatcher<?>>>();
        }
        mDispatchers.add(dispatcherClass);
    }

    @Override
    public void dispatchMessage(String message) {
        if (mDispatchers == null) {
            return;
        }
        Object json = null;
        try {
            json = JsonUtil.fromString(message);
        } catch (Exception e) {
            return;
        }
        boolean dispatched = false;
        for (Class<? extends IWebMessageDispatcher<?>> dispatcherClass : mDispatchers) {
            IWebMessageDispatcher dispatcher = null;
            try {
                dispatcher = JsonUtil.fromJson(json, dispatcherClass);
                dispatcher.setManager(this);
                if (!dispatcher.preTranslateMessage()) {
                    Object msg = dispatcher.translateMessage();
                    if (msg != null) {
                        dispatcher.onMessage(msg);
                        dispatched = true;
                    }
                }
            } catch (Exception e) {
                // Unknown Exception
            } finally {
                if (dispatcher != null) {
                    dispatcher.setManager(null);
                }
            }
        }
        if (dispatched) {
            Logs.i("WebMessageManager", message);
        } else {
            Logs.e("WebMessageManager", message);
        }
    }

    @Override
    public void onMessage(String message) {
        if (mWebFrame == null) {
            return;
        }
        mWebFrame.onMessage(message);
    }

    @Override
    public IWebFrame getWebFrame() {
        return mWebFrame;
    }

    @Override
    public void setWebFrame(IWebFrame webFrame) {
        mWebFrame = webFrame;
    }

    @Override
    public void clear() {
        mWebFrame = null;
        if (mDispatchers != null) {
            mDispatchers.clear();
        }
    }

}