| /* |
| * Copyright (c) 2001, Oracle 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. Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.imageio.plugins.jpeg; |
| |
| import javax.imageio.metadata.IIOMetadataFormat; |
| import javax.imageio.metadata.IIOMetadataFormatImpl; |
| import javax.imageio.ImageTypeSpecifier; |
| import javax.imageio.plugins.jpeg.JPEGQTable; |
| import javax.imageio.plugins.jpeg.JPEGHuffmanTable; |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| |
| abstract class JPEGMetadataFormat extends IIOMetadataFormatImpl { |
| // 2-byte length reduces max to 65533 |
| private static final int MAX_JPEG_DATA_SIZE = 65533; |
| |
| String resourceBaseName = this.getClass().getName() + "Resources"; |
| |
| JPEGMetadataFormat(String formatName, int childPolicy) { |
| super(formatName, childPolicy); |
| setResourceBaseName(resourceBaseName); |
| } |
| |
| // Format shared between image and stream formats |
| void addStreamElements(String parentName) { |
| addElement("dqt", parentName, 1, 4); |
| |
| addElement("dqtable", "dqt", CHILD_POLICY_EMPTY); |
| |
| addAttribute("dqtable", |
| "elementPrecision", |
| DATATYPE_INTEGER, |
| false, |
| "0"); |
| List tabids = new ArrayList(); |
| tabids.add("0"); |
| tabids.add("1"); |
| tabids.add("2"); |
| tabids.add("3"); |
| addAttribute("dqtable", |
| "qtableId", |
| DATATYPE_INTEGER, |
| true, |
| null, |
| tabids); |
| addObjectValue("dqtable", |
| JPEGQTable.class, |
| true, |
| null); |
| |
| addElement("dht", parentName, 1, 4); |
| addElement("dhtable", "dht", CHILD_POLICY_EMPTY); |
| List classes = new ArrayList(); |
| classes.add("0"); |
| classes.add("1"); |
| addAttribute("dhtable", |
| "class", |
| DATATYPE_INTEGER, |
| true, |
| null, |
| classes); |
| addAttribute("dhtable", |
| "htableId", |
| DATATYPE_INTEGER, |
| true, |
| null, |
| tabids); |
| addObjectValue("dhtable", |
| JPEGHuffmanTable.class, |
| true, |
| null); |
| |
| |
| addElement("dri", parentName, CHILD_POLICY_EMPTY); |
| addAttribute("dri", |
| "interval", |
| DATATYPE_INTEGER, |
| true, |
| null, |
| "0", "65535", |
| true, true); |
| |
| addElement("com", parentName, CHILD_POLICY_EMPTY); |
| addAttribute("com", |
| "comment", |
| DATATYPE_STRING, |
| false, |
| null); |
| addObjectValue("com", byte[].class, 1, MAX_JPEG_DATA_SIZE); |
| |
| addElement("unknown", parentName, CHILD_POLICY_EMPTY); |
| addAttribute("unknown", |
| "MarkerTag", |
| DATATYPE_INTEGER, |
| true, |
| null, |
| "0", "255", |
| true, true); |
| addObjectValue("unknown", byte[].class, 1, MAX_JPEG_DATA_SIZE); |
| } |
| |
| public boolean canNodeAppear(String elementName, |
| ImageTypeSpecifier imageType) { |
| // Just check if it appears in the format |
| if (isInSubtree(elementName, getRootName())){ |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns <code>true</code> if the named element occurs in the |
| * subtree of the format starting with the node named by |
| * <code>subtreeName</code>, including the node |
| * itself. <code>subtreeName</code> may be any node in |
| * the format. If it is not, an |
| * <code>IllegalArgumentException</code> is thrown. |
| */ |
| protected boolean isInSubtree(String elementName, |
| String subtreeName) { |
| if (elementName.equals(subtreeName)) { |
| return true; |
| } |
| String [] children = getChildNames(elementName); |
| for (int i=0; i < children.length; i++) { |
| if (isInSubtree(elementName, children[i])) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |