001: /*
002: * $RCSfile: PNMMetadataFormat.java,v $
003: *
004: *
005: * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * - Redistribution of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * - Redistribution in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * Neither the name of Sun Microsystems, Inc. or the names of
020: * contributors may be used to endorse or promote products derived
021: * from this software without specific prior written permission.
022: *
023: * This software is provided "AS IS," without a warranty of any
024: * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
025: * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
026: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027: * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
028: * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
029: * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030: * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
031: * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032: * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033: * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034: * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035: * POSSIBILITY OF SUCH DAMAGES.
036: *
037: * You acknowledge that this software is not designed or intended for
038: * use in the design, construction, operation or maintenance of any
039: * nuclear facility.
040: *
041: * $Revision: 1.1 $
042: * $Date: 2005/02/11 05:01:41 $
043: * $State: Exp $
044: */
045: package com.sun.media.imageioimpl.plugins.pnm;
046:
047: import java.util.Hashtable;
048: import javax.imageio.metadata.*;
049: import javax.imageio.ImageTypeSpecifier;
050:
051: public class PNMMetadataFormat extends IIOMetadataFormatImpl {
052: /** The table to link the child to its parent.
053: */
054: private static Hashtable parents = new Hashtable();
055:
056: static {
057: //children for the root
058: parents.put("FormatName",
059: "com_sun_media_imageio_plugins_pnm_image_1.0");
060: parents.put("Variant",
061: "com_sun_media_imageio_plugins_pnm_image_1.0");
062: parents.put("Width",
063: "com_sun_media_imageio_plugins_pnm_image_1.0");
064: parents.put("Height",
065: "com_sun_media_imageio_plugins_pnm_image_1.0");
066: parents.put("MaximumSample",
067: "com_sun_media_imageio_plugins_pnm_image_1.0");
068: parents.put("Comment",
069: "com_sun_media_imageio_plugins_pnm_image_1.0");
070: }
071:
072: private static PNMMetadataFormat instance;
073:
074: public static synchronized PNMMetadataFormat getInstance() {
075: if (instance == null)
076: instance = new PNMMetadataFormat();
077: return instance;
078: }
079:
080: String resourceBaseName = this .getClass().getName() + "Resources";
081:
082: /** Constructs <code>PNMMetadataFormat</code>. Calls the super
083: * class constructor. Sets the resource base name. Adds the elements
084: * into this format object based on the XML schema and DTD.
085: */
086: PNMMetadataFormat() {
087: super ("com_sun_media_imageio_plugins_pnm_image_1.0",
088: CHILD_POLICY_ALL);
089: setResourceBaseName(resourceBaseName);
090: addElements();
091: }
092:
093: /** Adds the elements into this format object based on the XML
094: * schema and DTD.
095: */
096: private void addElements() {
097: addElement("FormatName", getParent("FormatName"),
098: CHILD_POLICY_EMPTY);
099:
100: addElement("Variant", getParent("Variant"), CHILD_POLICY_EMPTY);
101: addElement("Width", getParent("Width"), CHILD_POLICY_EMPTY);
102: addElement("Height", getParent("Height"), CHILD_POLICY_EMPTY);
103: addElement("MaximumSample", getParent("MaximumSample"),
104: CHILD_POLICY_EMPTY);
105: addElement("Comment", getParent("Comment"), CHILD_POLICY_EMPTY);
106: }
107:
108: public String getParent(String elementName) {
109: return (String) parents.get(elementName);
110: }
111:
112: public boolean canNodeAppear(String elementName,
113: ImageTypeSpecifier imageType) {
114: if (getParent(elementName) != null)
115: return true;
116: return false;
117: }
118: }
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