Examples of ae.javax.imageio.metadata.IIOMetadataNode

ae.javax.imageio.metadata.IIOMetadataNode
A class representing a node in a meta-data tree, which implements the org.w3c.dom.Element interface and additionally allows for the storage of non-textual objects via the getUserObject and setUserObject methods.
This class is not intended to be used for general XML processing. In particular, Element nodes created within the Image I/O API are not compatible with those created by Sun's standard implementation of the org.w3.dom API. In particular, the implementation is tuned for simple uses and may not perform well for intensive processing.
Namespaces are ignored in this implementation. The terms "tag name" and "node name" are always considered to be synonymous. Note: The DOM Level 3 specification added a number of new methods to the {@code Node}, {@code Element} and {@code Attr} interfaces that are notof value to the {@code IIOMetadataNode} implementation or specification.Calling such methods on an {@code IIOMetadataNode}, or an {@code Attr}instance returned from an {@code IIOMetadataNode} will result in a{@code DOMException} being thrown. @see IIOMetadata#getAsTree @see IIOMetadata#setFromTree @see IIOMetadata#mergeTree


        return data_node;
    }


    public IIOMetadataNode getStandardDimensionNode() {
        IIOMetadataNode dimension_node = new IIOMetadataNode("Dimension");
        IIOMetadataNode node = null; // scratch node


        node = new IIOMetadataNode("PixelAspectRatio");
        float aspectRatio = 1.0F;
        if (pixelAspectRatio != 0) {
            aspectRatio = (pixelAspectRatio + 15)/64.0F;
        }
        node.setAttribute("value", Float.toString(aspectRatio));
        dimension_node.appendChild(node);


        node = new IIOMetadataNode("ImageOrientation");
        node.setAttribute("value", "Normal");
        dimension_node.appendChild(node);


        // HorizontalPixelSize not in format
        // VerticalPixelSize not in format
        // HorizontalPhysicalPixelSpacing not in format
        // VerticalPhysicalPixelSpacing not in format
        // HorizontalPosition not in format
        // VerticalPosition not in format
        // HorizontalPixelOffset not in stream
        // VerticalPixelOffset not in stream


        node = new IIOMetadataNode("HorizontalScreenSize");
        node.setAttribute("value",
                          logicalScreenWidth == UNDEFINED_INTEGER_VALUE ?
                          "" : Integer.toString(logicalScreenWidth));
        dimension_node.appendChild(node);


        node = new IIOMetadataNode("VerticalScreenSize");
        node.setAttribute("value",
                          logicalScreenHeight == UNDEFINED_INTEGER_VALUE ?
                          "" : Integer.toString(logicalScreenHeight));
        dimension_node.appendChild(node);


        return dimension_node;

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        return dimension_node;
    }


    public IIOMetadataNode getStandardDocumentNode() {
        IIOMetadataNode document_node = new IIOMetadataNode("Document");
        IIOMetadataNode node = null; // scratch node


        node = new IIOMetadataNode("FormatVersion");
        node.setAttribute("value", version);
        document_node.appendChild(node);


        // SubimageInterpretation not in format
        // ImageCreationTime not in format
        // ImageModificationTime not in format

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        }
        return newGuy;
    }


    IIOMetadataNode getNativeNode() {
        IIOMetadataNode node = new IIOMetadataNode("dht");
        for (int i= 0; i<tables.size(); i++) {
            Htable table = (Htable) tables.get(i);
            node.appendChild(table.getNativeNode());
        }
        return node;
    }

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                        ("dhtable node must have 2 attributes", node);
                }
                tableClass = getAttributeValue(node, attrs, "class", 0, 1, true);
                tableID = getAttributeValue(node, attrs, "htableId", 0, 3, true);
                if (node instanceof IIOMetadataNode) {
                    IIOMetadataNode ourNode = (IIOMetadataNode) node;
                    JPEGHuffmanTable table =
                        (JPEGHuffmanTable) ourNode.getUserObject();
                    if (table == null) {
                        throw new IIOInvalidTreeException
                            ("dhtable node must have user object", node);
                    }
                    numCodes = table.getLengths();

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            }
            return newGuy;
        }


        IIOMetadataNode getNativeNode() {
            IIOMetadataNode node = new IIOMetadataNode("dhtable");
            node.setAttribute("class", Integer.toString(tableClass));
            node.setAttribute("htableId", Integer.toString(tableID));


            node.setUserObject(new JPEGHuffmanTable(numCodes, values));


            return node;
        }

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        throw  new IllegalArgumentException("Unsupported format name: "
                                                + formatName);
    }


    IIOMetadataNode getNativeTree() {
        IIOMetadataNode root;
        IIOMetadataNode top;
        Iterator iter = markerSequence.iterator();
        if (isStream) {
            root = new IIOMetadataNode(JPEG.nativeStreamMetadataFormatName);
            top = root;
        } else {
            IIOMetadataNode sequence = new IIOMetadataNode("markerSequence");
            if (!inThumb) {
                root = new IIOMetadataNode(JPEG.nativeImageMetadataFormatName);
                IIOMetadataNode header = new IIOMetadataNode("JPEGvariety");
                root.appendChild(header);
                JFIFMarkerSegment jfif = (JFIFMarkerSegment)
                    findMarkerSegment(JFIFMarkerSegment.class, true);
                if (jfif != null) {
                    iter.next();  // JFIF must be first, so this skips it
                    header.appendChild(jfif.getNativeNode());
                }
                root.appendChild(sequence);
            } else {
                root = sequence;
            }

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        if (sof == null) {
            // No image, so no chroma
            return null;
        }


        IIOMetadataNode chroma = new IIOMetadataNode("Chroma");
        IIOMetadataNode csType = new IIOMetadataNode("ColorSpaceType");
        chroma.appendChild(csType);


        // get the number of channels
        int numChannels = sof.componentSpecs.length;


        IIOMetadataNode numChanNode = new IIOMetadataNode("NumChannels");
        chroma.appendChild(numChanNode);
        numChanNode.setAttribute("value", Integer.toString(numChannels));


        // is there a JFIF marker segment?
        if (findMarkerSegment(JFIFMarkerSegment.class, true) != null) {
            if (numChannels == 1) {
                csType.setAttribute("name", "GRAY");

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        return chroma;
    }


    protected IIOMetadataNode getStandardCompressionNode() {


        IIOMetadataNode compression = new IIOMetadataNode("Compression");


        // CompressionTypeName
        IIOMetadataNode name = new IIOMetadataNode("CompressionTypeName");
        name.setAttribute("value", "JPEG");
        compression.appendChild(name);


        // Lossless - false
        IIOMetadataNode lossless = new IIOMetadataNode("Lossless");
        lossless.setAttribute("value", "false");
        compression.appendChild(lossless);


        // NumProgressiveScans - count sos segments
        int sosCount = 0;
        Iterator iter = markerSequence.iterator();
        while (iter.hasNext()) {
            MarkerSegment ms = (MarkerSegment) iter.next();
            if (ms.tag == JPEG.SOS) {
                sosCount++;
            }
        }
        if (sosCount != 0) {
            IIOMetadataNode prog = new IIOMetadataNode("NumProgressiveScans");
            prog.setAttribute("value", Integer.toString(sosCount));
            compression.appendChild(prog);
        }


        return compression;
    }

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    }


    protected IIOMetadataNode getStandardDimensionNode() {
        // If we have a JFIF marker segment, we know a little
        // otherwise all we know is the orientation, which is always normal
        IIOMetadataNode dim = new IIOMetadataNode("Dimension");
        IIOMetadataNode orient = new IIOMetadataNode("ImageOrientation");
        orient.setAttribute("value", "normal");
        dim.appendChild(orient);


        JFIFMarkerSegment jfif =
            (JFIFMarkerSegment) findMarkerSegment(JFIFMarkerSegment.class, true);
        if (jfif != null) {


            // Aspect Ratio is width of pixel / height of pixel
            float aspectRatio;
            if (jfif.resUnits == 0) {
                // In this case they just encode aspect ratio directly
                aspectRatio = ((float) jfif.Xdensity)/jfif.Ydensity;
            } else {
                // They are true densities (e.g. dpi) and must be inverted
                aspectRatio = ((float) jfif.Ydensity)/jfif.Xdensity;
            }
            IIOMetadataNode aspect = new IIOMetadataNode("PixelAspectRatio");
            aspect.setAttribute("value", Float.toString(aspectRatio));
            dim.insertBefore(aspect, orient);


            // Pixel size
            if (jfif.resUnits != 0) {
                // 1 == dpi, 2 == dpc
                float scale = (jfif.resUnits == 1) ? 25.4F : 10.0F;


                IIOMetadataNode horiz =
                    new IIOMetadataNode("HorizontalPixelSize");
                horiz.setAttribute("value",
                                   Float.toString(scale/jfif.Xdensity));
                dim.appendChild(horiz);


                IIOMetadataNode vert =
                    new IIOMetadataNode("VerticalPixelSize");
                vert.setAttribute("value",
                                  Float.toString(scale/jfif.Ydensity));
                dim.appendChild(vert);
            }
        }
        return dim;

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        }
        return dim;
    }


    protected IIOMetadataNode getStandardTextNode() {
        IIOMetadataNode text = null;
        // Add a text entry for each COM Marker Segment
        if (findMarkerSegment(JPEG.COM) != null) {
            text = new IIOMetadataNode("Text");
            Iterator iter = markerSequence.iterator();
            while (iter.hasNext()) {
                MarkerSegment seg = (MarkerSegment) iter.next();
                if (seg.tag == JPEG.COM) {
                    COMMarkerSegment com = (COMMarkerSegment) seg;
                    IIOMetadataNode entry = new IIOMetadataNode("TextEntry");
                    entry.setAttribute("keyword", "comment");
                    entry.setAttribute("value", com.getComment());
                text.appendChild(entry);
                }
            }
        }
        return text;

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