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/* Copyright (c) 2015, David A. Clunie DBA Pixelmed Publishing. All rights reserved. */
package com.pixelmed.imageio;
// follow the pattern described in "http://docs.oracle.com/javase/1.5.0/docs/guide/imageio/spec/extending.fm3.html"
import org.w3c.dom.*;
import javax.xml.parsers.*; // Package name may change in J2SDK 1.4
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.imageio.metadata.IIOInvalidTreeException;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataNode;
public class JPEGLosslessMetadata extends IIOMetadata {
private static final String identString = "@(#) $Header: /userland/cvs/codec/com/pixelmed/imageio/JPEGLosslessMetadata.java,v 1.2 2015/10/19 15:34:42 dclunie Exp $";
static final String nativeMetadataFormatName = "com.pixelmed.imageio.JPEGLosslessMetadata_0.1";
static final String nativeMetadataFormatClassName = "com.pixelmed.imageio.JPEGLosslessMetadata";
// Keyword/value pairs
List keywords = new ArrayList();
List values = new ArrayList();
public JPEGLosslessMetadata() {
super(
false/*standardMetadataFormatSupported*/,
nativeMetadataFormatName,
nativeMetadataFormatClassName,
null/*extraMetadataFormatNames*/,
null/*extraMetadataFormatClassNames*/);
}
public IIOMetadataFormat getMetadataFormat(String formatName) {
if (!formatName.equals(nativeMetadataFormatName)) {
throw new IllegalArgumentException("Bad format name!");
}
return JPEGLosslessMetadataFormat.getDefaultInstance();
}
public Node getAsTree(String formatName) {
if (!formatName.equals(nativeMetadataFormatName)) {
throw new IllegalArgumentException("Bad format name!");
}
// Create a root node
IIOMetadataNode root = new IIOMetadataNode(nativeMetadataFormatName);
// Add a child to the root node for each keyword/value pair
Iterator keywordIter = keywords.iterator();
Iterator valueIter = values.iterator();
while (keywordIter.hasNext()) {
IIOMetadataNode node = new IIOMetadataNode("KeywordValuePair");
node.setAttribute("keyword", (String)keywordIter.next());
node.setAttribute("value", (String)valueIter.next());
root.appendChild(node);
}
return root;
}
public boolean isReadOnly() {
return true; // since no writer plug-in
}
public void reset() {
this.keywords = new ArrayList();
this.values = new ArrayList();
}
public void mergeTree(String formatName, Node root) throws IIOInvalidTreeException {
if (!formatName.equals(nativeMetadataFormatName)) {
throw new IllegalArgumentException("Bad format name!");
}
Node node = root;
if (!node.getNodeName().equals(nativeMetadataFormatName)) {
throw new IIOInvalidTreeException("Root must be " + nativeMetadataFormatName,node);
}
node = node.getFirstChild();
while (node != null) {
if (!node.getNodeName().equals("KeywordValuePair")) {
throw new IIOInvalidTreeException("Node name not KeywordValuePair!",node);
}
NamedNodeMap attributes = node.getAttributes();
Node keywordNode = attributes.getNamedItem("keyword");
Node valueNode = attributes.getNamedItem("value");
if (keywordNode == null || valueNode == null) {
throw new IIOInvalidTreeException("Keyword or value missing!",node);
}
// Store keyword and value
keywords.add((String)keywordNode.getNodeValue());
values.add((String)valueNode.getNodeValue());
// Move to the next sibling
node = node.getNextSibling();
}
}
}
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