Java tutorial
/* * Copyright (C) 2005-2015 Alfresco Software Limited. * * This file is part of Alfresco Mobile for Android. * * 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 org.alfresco.mobile.android.application.managers; import java.io.IOException; import java.lang.ref.WeakReference; import java.util.HashMap; import java.util.List; import java.util.Map; import org.alfresco.mobile.android.api.constants.OnPremiseConstant; import org.alfresco.mobile.android.api.services.DocumentFolderService; import org.alfresco.mobile.android.api.services.impl.AbstractDocumentFolderServiceImpl; import org.alfresco.mobile.android.api.services.impl.AbstractPersonService; import org.alfresco.mobile.android.api.services.impl.AbstractWorkflowService; import org.alfresco.mobile.android.api.session.AlfrescoSession; import org.alfresco.mobile.android.api.session.RepositorySession; import org.alfresco.mobile.android.api.session.impl.AbstractAlfrescoSessionImpl; import org.alfresco.mobile.android.api.utils.NodeRefUtils; import org.alfresco.mobile.android.api.utils.OnPremiseUrlRegistry; import org.alfresco.mobile.android.application.R; import org.alfresco.mobile.android.platform.network.NetworkSingleton; import org.alfresco.mobile.android.platform.utils.SessionUtils; import org.alfresco.mobile.android.ui.rendition.RenditionManager; import org.alfresco.mobile.android.ui.rendition.RenditionRequest; import org.apache.chemistry.opencmis.commons.impl.UrlBuilder; import android.content.Context; import android.content.res.Resources; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.support.v4.app.FragmentActivity; import android.text.TextUtils; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.ImageView.ScaleType; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.picasso.Callback; import com.squareup.picasso.OkHttpDownloader; import com.squareup.picasso.Picasso; import com.squareup.picasso.Picasso.Builder; import it.sephiroth.android.library.imagezoom.ImageViewTouch; import it.sephiroth.android.library.imagezoom.ImageViewTouchBase.DisplayType; /** * Utility class for downloading content and display it. * * @author jpascal */ public class RenditionManagerImpl extends RenditionManager { private static final String TAG = RenditionManagerImpl.class.getSimpleName(); protected WeakReference<FragmentActivity> activityRef; private AlfrescoSession session; private Picasso picasso; public static final int TYPE_NODE = 0; public static final int TYPE_PERSON = 1; public static final int TYPE_WORKFLOW = 2; private static final String AWAIT = "await"; private static final String NO_RENDITION = "NoRendition"; protected Map<String, String> streamUriStore = new HashMap<String, String>(); protected Map<String, String> previewUriStore = new HashMap<String, String>(); protected Map<String, Integer> urlRetrievers = new HashMap<String, Integer>(); // /////////////////////////////////////////////////////////////////////////// // CONSTRUCTOR // /////////////////////////////////////////////////////////////////////////// public static RenditionManagerImpl getInstance(Context context) { synchronized (LOCK) { if (mInstance == null) { mInstance = new RenditionManagerImpl(context); if (context instanceof FragmentActivity) { ((RenditionManagerImpl) mInstance).setCurrentActivity((FragmentActivity) context); } } return (RenditionManagerImpl) mInstance; } } protected RenditionManagerImpl(Context applicationContext) { super(applicationContext); } // /////////////////////////////////////////////////////////////////////////// // PUBLIC METHODS // /////////////////////////////////////////////////////////////////////////// public Picasso getPicasso() { if (picasso == null) { picasso = new Builder(appContext).build(); } return picasso; } public void setCurrentActivity(FragmentActivity activity) { activityRef = new WeakReference<>(activity); } /** * Display the content of the url inside an imageview. (thumbnails) */ private void displayPlaceHolder(WeakReference<ImageView> ivRef, int placeHolderId) { if (ivRef != null && ivRef.isEnqueued()) { ivRef.get().setImageResource(placeHolderId); } } private void displayPlaceHolder(ImageView iv, int placeHolderId) { iv.setImageResource(placeHolderId); } public void display(RenditionRequest request) { // Prerequisites if (session == null) { setSession(SessionUtils.getSession(appContext)); } if (picasso == null) { picasso = new Builder(appContext).build(); } // Cancel any previous request if (picasso != null) { picasso.cancelRequest(request.iv.get()); } // Wrong identifier so display placeholder directly String url = null; if (TextUtils.isEmpty(request.itemId) || session == null) { request.iv.get().setImageResource(request.placeHolderId); return; } // Let's find how to display the itemId switch (request.typeId) { case TYPE_NODE: if (session instanceof RepositorySession) { url = getDocumentRendition(request.itemId, DocumentFolderService.RENDITION_THUMBNAIL); if (request.renditionTypeId == RenditionRequest.RENDITION_PREVIEW) { url = getDocumentRendition(request.itemId, DocumentFolderService.RENDITION_PREVIEW); } startPicasso(url, request); return; } else if (hasReference(request.itemId, request.renditionTypeId)) { url = getReference(request.itemId, request.renditionTypeId); startPicasso(url, request); return; } break; case TYPE_WORKFLOW: url = ((AbstractWorkflowService) session.getServiceRegistry().getWorkflowService()) .getProcessDiagramUrl(request.itemId).toString(); startPicasso(url, request); return; case TYPE_PERSON: if (session instanceof RepositorySession && session.getRepositoryInfo().getMajorVersion() >= OnPremiseConstant.ALFRESCO_VERSION_4) { url = OnPremiseUrlRegistry.getAvatarUrl(session, request.itemId); startPicasso(url, request); return; } else if (hasReference(request.itemId, request.renditionTypeId)) { url = getReference(request.itemId, request.renditionTypeId); startPicasso(url, request); return; } break; default: break; } // We don't know the url associated to the itemId, we need to find it // first. displayPlaceHolder(request.iv, request.placeHolderId); if (getReference(request.itemId, request.renditionTypeId) == null && activityRef != null) { addReference(request.itemId, AWAIT, request.renditionTypeId); urlRetrieverThread thread = new urlRetrieverThread(activityRef.get(), session, request); thread.setPriority(Thread.MIN_PRIORITY); if (request.renditionTypeId == RenditionRequest.RENDITION_PREVIEW) { thread.setPriority(Thread.NORM_PRIORITY); } final AsyncDrawable asyncDrawable = new AsyncDrawable(activityRef.get().getResources(), thread); request.iv.get().setImageDrawable(asyncDrawable); if (thread.getState() == Thread.State.NEW) { thread.start(); } } else { request.iv.get().setImageResource(request.placeHolderId); } } private void startPicasso(String url, final RenditionRequest request) { if (request.iv == null || request.iv.get() == null) { return; } if (url == null) { displayPlaceHolder(request.iv.get(), request.placeHolderId); } picasso.cancelRequest(request.iv.get()); try { picasso.load(url).placeholder(request.placeHolderId).into(request.iv.get(), new Callback() { @Override public void onSuccess() { if (request.iv.get() instanceof ImageViewTouch) { if (request.touchViewEnabled != null) { ((ImageViewTouch) request.iv.get()).setScaleEnabled(request.touchViewEnabled); ((ImageViewTouch) request.iv.get()).setDoubleTapEnabled(request.touchViewEnabled); } ((ImageViewTouch) request.iv.get()).setDisplayType(DisplayType.FIT_TO_SCREEN); if (((ViewGroup) request.iv.get().getParent()).findViewById(R.id.preview_message) != null) { ((ViewGroup) request.iv.get().getParent()).findViewById(R.id.preview_message) .setVisibility(View.GONE); } } } @Override public void onError() { if (request.iv.get() instanceof ImageViewTouch) { ((ImageViewTouch) request.iv.get()).setDisplayType(DisplayType.FIT_IF_BIGGER); request.iv.get().setScaleType(ScaleType.FIT_CENTER); } displayPlaceHolder(request.iv.get(), request.placeHolderId); displayErrorMessage(request.iv.get()); } }); } catch (IllegalArgumentException e) { // Do nothing } catch (Exception e) { // Do nothing } } private void displayErrorMessage(ImageView iv) { if (iv != null && ((ViewGroup) iv.getParent()).findViewById(R.id.preview_message) != null) { ((ViewGroup) iv.getParent()).findViewById(R.id.preview_message).setVisibility(View.VISIBLE); } } private class urlRetrieverThread extends Thread { private AlfrescoSession session; private FragmentActivity ctxt; private final RenditionRequest request; public urlRetrieverThread(FragmentActivity ctxt, AlfrescoSession session, RenditionRequest request) { this.session = session; this.ctxt = ctxt; this.request = request; } @Override public void run() { UrlBuilder url = null; try { switch (request.typeId) { case TYPE_NODE: String renditionId = DocumentFolderService.RENDITION_THUMBNAIL; if (request.renditionTypeId == RenditionRequest.RENDITION_PREVIEW) { renditionId = DocumentFolderService.RENDITION_PREVIEW; } if (isInterrupted()) { return; } url = ((AbstractDocumentFolderServiceImpl) session.getServiceRegistry() .getDocumentFolderService()).getRenditionUrl(request.itemId, renditionId); break; case TYPE_WORKFLOW: url = ((AbstractWorkflowService) session.getServiceRegistry().getWorkflowService()) .getProcessDiagramUrl(request.itemId); break; case TYPE_PERSON: url = ((AbstractPersonService) session.getServiceRegistry().getPersonService()) .getAvatarUrl(request.itemId); break; default: break; } if (url != null && request.iv.get() != null) { addReference(request.itemId, url.toString(), request.renditionTypeId); if (isInterrupted()) { return; } ctxt.runOnUiThread(new urlDisplayer(url.toString(), request)); } else if (url == null) { addReference(request.itemId, NO_RENDITION, request.renditionTypeId); if (isInterrupted()) { return; } ctxt.runOnUiThread(new urlDisplayer(null, request)); } } catch (Exception e) { addReference(request.itemId, NO_RENDITION, request.renditionTypeId); ctxt.runOnUiThread(new urlDisplayer(null, request)); } } } private void addReference(String identifier, String url, Integer preview) { if (preview != null && preview == RenditionRequest.RENDITION_PREVIEW) { previewUriStore.put(identifier, url); } else { streamUriStore.put(identifier, url); } } private boolean hasReference(String identifier, Integer preview) { if (preview != null && preview == RenditionRequest.RENDITION_PREVIEW) { return previewUriStore.containsKey(identifier) && !previewUriStore.get(identifier).equals(AWAIT); } else { return streamUriStore.containsKey(identifier) && !streamUriStore.get(identifier).equals(AWAIT); } } private String getReference(String identifier, Integer preview) { if (preview != null && preview == RenditionRequest.RENDITION_PREVIEW) { return previewUriStore.get(identifier); } else { return streamUriStore.get(identifier); } } // Used to display bitmap in the UI thread private class urlDisplayer implements Runnable { private String url; private RenditionRequest request; public urlDisplayer(String url, RenditionRequest request) { this.url = url; this.request = request; } public void run() { if (request != null) { startPicasso(url, request); } else if (request.iv != null && request.iv.get() != null) { displayErrorMessage(request.iv.get()); } } } // ////////////////////////////////////////////////////////////////////////////////////////// // ////////////////////////////////////////////////////////////////////////////////////////// // ////////////////////////////////////////////////////////////////////////////////////////// public static class AsyncDrawable extends BitmapDrawable { private final WeakReference<urlRetrieverThread> bitmapWorkerTaskReference; public AsyncDrawable(Resources res, urlRetrieverThread bitmapThread) { super(res); bitmapWorkerTaskReference = new WeakReference<urlRetrieverThread>(bitmapThread); } public urlRetrieverThread getBitmapWorkerTask() { return bitmapWorkerTaskReference.get(); } } public static boolean cancelPotentialWork(String data, ImageView imageView) { final urlRetrieverThread bitmapWorkerTask = getBitmapThread(imageView); if (bitmapWorkerTask != null) { final String workerId = bitmapWorkerTask.request.itemId; if (workerId != null && !workerId.equals(data)) { bitmapWorkerTask.interrupt(); } else { return false; } } return true; } private static urlRetrieverThread getBitmapThread(ImageView imageView) { if (imageView != null) { final Drawable drawable = imageView.getDrawable(); if (drawable instanceof AsyncDrawable) { final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable; return asyncDrawable.getBitmapWorkerTask(); } } return null; } public boolean hasSameSession(AlfrescoSession alfrescoSession) { return !(alfrescoSession == null || session == null) && alfrescoSession.equals(session); } public String getDocumentRendition(String identifier, String type) { try { String nodeIdentifier = identifier; if (NodeRefUtils.isVersionIdentifier(identifier) || NodeRefUtils.isIdentifier(identifier)) { nodeIdentifier = NodeRefUtils.createNodeRefByIdentifier(identifier); } UrlBuilder url = new UrlBuilder(OnPremiseUrlRegistry.getThumbnailsUrl(session, nodeIdentifier, type)); url.addParameter("format", "json"); return url.toString(); } catch (Exception e) { return null; } } public void setSession(AlfrescoSession alfrescoSession) { this.session = alfrescoSession; if (picasso != null) { picasso.shutdown(); } OkHttpClient client = null; // Specific to detect if OKhttp is used try { Class.forName("org.alfresco.mobile.android.platform.network.MobileIronHttpInvoker"); // OKhttp compatible with MobileIron ? client = new OkHttpClient(); } catch (ClassNotFoundException e) { client = NetworkSingleton.getInstance().getHttpClient().clone(); } ImageDownloader imageLoader = new ImageDownloader(client, alfrescoSession); Builder builder = new Builder(appContext); picasso = builder.downloader(imageLoader).build(); } // /////////////////////////////////////////////////////////////////////////// // INNER CLASS // /////////////////////////////////////////////////////////////////////////// public class ImageDownloader extends OkHttpDownloader { public ImageDownloader(OkHttpClient client, AlfrescoSession alfSession) { super(client); if (alfSession == null && ((AbstractAlfrescoSessionImpl) alfSession).getAuthenticationProvider() == null) { return; } Map<String, List<String>> httpHeaders = ((AbstractAlfrescoSessionImpl) alfSession) .getAuthenticationProvider().getHTTPHeaders(); Map<String, String> headers = new HashMap<>(httpHeaders != null ? httpHeaders.size() : 0); // set other headers if (httpHeaders != null) { for (Map.Entry<String, List<String>> header : httpHeaders.entrySet()) { if (header.getValue() != null) { for (String value : header.getValue()) { headers.put(header.getKey(), value); } } } addHeaders(client, headers); } } private void addHeaders(OkHttpClient okHttpClient, final Map<String, String> headers) { okHttpClient.interceptors().add(new com.squareup.okhttp.Interceptor() { @Override public com.squareup.okhttp.Response intercept(Chain chain) throws IOException { Request.Builder builder = chain.request().newBuilder(); for (Map.Entry<String, String> header : headers.entrySet()) { builder.addHeader(header.getKey(), header.getValue()).build(); } return chain.proceed(builder.build()); } }); } } }