Created
February 7, 2017 22:32
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Quick tool to print imageio metadata adapted from: http://johnbokma.com/java/obtaining-image-metadata.html
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import java.io.File; | |
import java.util.Iterator; | |
import javax.imageio.ImageIO; | |
import javax.imageio.ImageReader; | |
import javax.imageio.metadata.IIOMetadata; | |
import javax.imageio.stream.ImageInputStream; | |
import org.w3c.dom.NamedNodeMap; | |
import org.w3c.dom.Node; | |
public class Metadata { | |
public static void main(String[] args) { | |
Metadata meta = new Metadata(); | |
int length = args.length; | |
for ( int i = 0; i < length; i++ ) | |
meta.readAndDisplayMetadata( args[i] ); | |
} | |
void readAndDisplayMetadata( String fileName ) { | |
try { | |
File file = new File( fileName ); | |
ImageInputStream iis = ImageIO.createImageInputStream(file); | |
Iterator<ImageReader> readers = ImageIO.getImageReaders(iis); | |
while (readers.hasNext()) { | |
iis.seek(0); | |
ImageReader reader = readers.next(); | |
System.out.println("Reader: " + reader.getClass().getCanonicalName()); | |
// attach source to the reader | |
reader.setInput(iis, true); | |
// read metadata of first image | |
IIOMetadata metadata = reader.getImageMetadata(0); | |
String[] names = metadata.getMetadataFormatNames(); | |
int length = names.length; | |
for (int i = 0; i < length; i++) { | |
System.out.println( "Format name: " + names[ i ] ); | |
displayMetadata(metadata.getAsTree(names[i])); | |
} | |
} | |
} | |
catch (Exception e) { | |
e.printStackTrace(); | |
} | |
} | |
void displayMetadata(Node root) { | |
displayMetadata(root, 0); | |
} | |
void indent(int level) { | |
for (int i = 0; i < level; i++) | |
System.out.print(" "); | |
} | |
void displayMetadata(Node node, int level) { | |
// print open tag of element | |
indent(level); | |
System.out.print("<" + node.getNodeName()); | |
NamedNodeMap map = node.getAttributes(); | |
if (map != null) { | |
// print attribute values | |
int length = map.getLength(); | |
for (int i = 0; i < length; i++) { | |
Node attr = map.item(i); | |
System.out.print(" " + attr.getNodeName() + | |
"=\"" + attr.getNodeValue() + "\""); | |
} | |
} | |
Node child = node.getFirstChild(); | |
if (child == null) { | |
// no children, so close element and return | |
System.out.println("/>"); | |
return; | |
} | |
// children, so close current tag | |
System.out.println(">"); | |
while (child != null) { | |
// print children recursively | |
displayMetadata(child, level + 1); | |
child = child.getNextSibling(); | |
} | |
// print close tag of element | |
indent(level); | |
System.out.println("</" + node.getNodeName() + ">"); | |
} | |
} |
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