org.apache.wicket.markup.html.image.resource.BufferedDynamicImageResource.java Source code

Introduction

Here is the source code for org.apache.wicket.markup.html.image.resource.BufferedDynamicImageResource.java

Source

/*
 * 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.wicket.markup.html.image.resource;

import java.awt.image.BufferedImage;

import org.apache.wicket.request.resource.DynamicImageResource;

/**
 * A DynamicImageResource subclass that holds a BufferedImage generated by code elsewhere. The image
 * is held in a non-transient field, and so if this resource is clustered, the entire image will be
 * serialized and copied. If you can regenerate your image by drawing on a Graphics2D, you should
 * prefer the RenderedDynamicImageResource class instead since its image data is transient and
 * therefore it is very lightweight when clustered.
 * <p>
 * The format of the image (and therefore the resource's extension) can be specified with
 * setFormat(String). The default format is "PNG" because JPEG is lossy and makes generated images
 * look bad and GIF has patent issues.
 * 
 * @see org.apache.wicket.markup.html.image.resource.RenderedDynamicImageResource
 * @author Jonathan Locke
 */
public class BufferedDynamicImageResource extends DynamicImageResource {
    private static final long serialVersionUID = 1L;

    /** The byte array holding the contents of the dynamic image */
    private byte[] imageData;

    /**
     * Construct.
     */
    public BufferedDynamicImageResource() {
    }

    /**
     * Construct.
     * 
     * @param format
     */
    public BufferedDynamicImageResource(String format) {
        super(format);
    }

    /**
     * @param image
     *            The image to set
     */
    public synchronized void setImage(final BufferedImage image) {
        imageData = toImageData(image);
    }

    @Override
    protected byte[] getImageData(Attributes attributes) {
        return imageData;
    }
}