core/src/main/java/org/apache/karaf/webconsole/core/page/AvatarImage.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 org.apache.karaf.webconsole.core.page;

import org.apache.wicket.ResourceReference;
import org.apache.wicket.markup.html.image.Image;
import org.apache.wicket.resource.ByteArrayResource;
import org.osgi.service.prefs.Preferences;

/**
 * Avatar image which displays picture from preference store.
 */
public class AvatarImage extends Image {

    private static final long serialVersionUID = 1L;

    public AvatarImage(String id, Preferences preferences) {
        super(id);

        byte[] avatar = preferences.getByteArray("avatar", new byte[0]);

        if (avatar != null && avatar.length > 0) {
            String contentType = preferences.get("avatar-mime-type", "image/jpg");
            ByteArrayResource resource = new ByteArrayResource(contentType, avatar);
            resource.setCacheable(false);
            setImageResource(resource);
            return;
        }

        setImageResourceReference(new ResourceReference(AvatarImage.class, "apache-avatar.png"));
    }

}