001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.markup.html.image.resource; 018 019import java.awt.image.BufferedImage; 020 021import org.apache.wicket.request.resource.DynamicImageResource; 022 023/** 024 * A DynamicImageResource subclass that holds a BufferedImage generated by code elsewhere. The image 025 * is held in a non-transient field, and so if this resource is clustered, the entire image will be 026 * serialized and copied. If you can regenerate your image by drawing on a Graphics2D, you should 027 * prefer the RenderedDynamicImageResource class instead since its image data is transient and 028 * therefore it is very lightweight when clustered. 029 * <p> 030 * The format of the image (and therefore the resource's extension) can be specified with 031 * setFormat(String). The default format is "PNG" because JPEG is lossy and makes generated images 032 * look bad and GIF has patent issues. 033 * 034 * @see org.apache.wicket.markup.html.image.resource.RenderedDynamicImageResource 035 * @author Jonathan Locke 036 */ 037public class BufferedDynamicImageResource extends DynamicImageResource 038{ 039 private static final long serialVersionUID = 1L; 040 041 /** The byte array holding the contents of the dynamic image */ 042 private byte[] imageData; 043 044 /** 045 * Construct. 046 */ 047 public BufferedDynamicImageResource() 048 { 049 } 050 051 /** 052 * Construct. 053 * 054 * @param format 055 */ 056 public BufferedDynamicImageResource(String format) 057 { 058 super(format); 059 } 060 061 /** 062 * @param image 063 * The image to set 064 */ 065 public synchronized void setImage(final BufferedImage image) 066 { 067 imageData = toImageData(image); 068 } 069 070 @Override 071 protected byte[] getImageData(Attributes attributes) 072 { 073 return imageData; 074 } 075}