com.codename1.cloud.CloudImageProperty Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.cloud;
import com.codename1.components.ReplaceableImage;
import com.codename1.io.CacheMap;
import com.codename1.io.ConnectionRequest;
import com.codename1.io.NetworkManager;
import com.codename1.ui.EncodedImage;
import com.codename1.ui.Image;
import com.codename1.ui.util.ImageIO;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;
/**
* A custom property that converts a cloud file id value to an image
* that is cached locally asynchronously.
*
* @author Shai Almog
* @deprecated the cloud storage API is no longer supported, we recommend switching to a solution such as parse4cn1
*/
public class CloudImageProperty implements CustomProperty {
private static CacheMap cloudImageCache;
private String idProperty;
private EncodedImage placeholderImage;
private Hashtable inProgress = new Hashtable();
/**
* Create an image property for the given id that will hold the place holder image
* while downloading the actual image
* @param idProperty the id
* @param placeholderImage placeholder shown while id is downloaded
*/
public CloudImageProperty(String idProperty, EncodedImage placeholderImage) {
this.idProperty = idProperty;
this.placeholderImage = placeholderImage;
}
private CacheMap getCache() {
if(cloudImageCache == null) {
cloudImageCache = new CacheMap("CN1CIP$");
}
return cloudImageCache;
}
/**
* {@inheritDoc}
*/
public Object propertyValue(CloudObject obj, String propertyName) {
final String key = (String)obj.getObject(idProperty);
if(key == null) {
return placeholderImage;
}
Image image = (Image)getCache().get(key);
if(image == null) {
ReplaceableImage r = inProgress.get(key);
if(r != null) {
return r;
}
final ReplaceableImage rp = ReplaceableImage.create(placeholderImage);
inProgress.put(key, rp);
ConnectionRequest cr = new ConnectionRequest() {
private EncodedImage e;
protected void readResponse(InputStream input) throws IOException {
e = EncodedImage.create(input);;
if(e.getWidth() != placeholderImage.getWidth() || e.getHeight() != placeholderImage.getHeight()) {
ImageIO io = ImageIO.getImageIO();
if(io != null) {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
io.save(new ByteArrayInputStream(e.getImageData()), bo, ImageIO.FORMAT_JPEG, placeholderImage.getWidth(), placeholderImage.getHeight(), 0.9f);
e = EncodedImage.create(bo.toByteArray());
}
}
}
protected void postResponse() {
rp.replace(e);
getCache().put(key, e);
inProgress.remove(key);
}
};
cr.setPost(false);
cr.setUrl(CloudStorage.getInstance().getUrlForCloudFileId(key));
NetworkManager.getInstance().addToQueue(cr);
return rp;
}
return image;
}
}