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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