Java IIOMetadata.mergeTree方法代碼示例

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
public static void main(String[] args) throws Exception {
    String format = "javax_imageio_1.0";
    BufferedImage img =
        new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);
    ImageWriter iw = ImageIO.getImageWritersByMIMEType("image/png").next();
    IIOMetadata meta =
        iw.getDefaultImageMetadata(new ImageTypeSpecifier(img), null);
    DOMImplementationRegistry registry;
    registry = DOMImplementationRegistry.newInstance();
    DOMImplementation impl = registry.getDOMImplementation("XML 3.0");
    Document doc = impl.createDocument(null, format, null);
    Element root, text, entry;
    root = doc.getDocumentElement();
    root.appendChild(text = doc.createElement("Text"));
    text.appendChild(entry = doc.createElement("TextEntry"));
    // keyword isn't #REQUIRED by the standard metadata format.
    // However, it is required by the PNG format, so we include it here.
    entry.setAttribute("keyword", "Comment");
    entry.setAttribute("value", "Some demo comment");
    meta.mergeTree(format, root);
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
private IIOMetadata upgradeMetadata(IIOMetadata src, BufferedImage bi) {
    String format = src.getNativeMetadataFormatName();
    System.out.println("Native format: " + format);
    Node root = src.getAsTree(format);

    // add hIST node
    Node n = lookupChildNode(root, "hIST");
    if (n == null) {
        System.out.println("Appending new hIST node...");
        Node hIST = gethISTNode(bi);
        root.appendChild(hIST);
    }

    System.out.println("Upgraded metadata tree:");
    dump(root, "");

    System.out.println("Merging metadata...");
    try {
        src.mergeTree(format, root);
    } catch (IIOInvalidTreeException e) {
        throw new RuntimeException("Test FAILED!", e);
    }
    return src;
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
/**
 * Merges <code>inData</code> into <code>outData</code>. The supplied
 * metadata format name is attempted first and failing that the standard
 * metadata format name is attempted.
 */
private void convertMetadata(String metadataFormatName,
                             IIOMetadata inData,
                             IIOMetadata outData) {
    String formatName = null;

    String nativeFormatName = inData.getNativeMetadataFormatName();
    if (nativeFormatName != null &&
        nativeFormatName.equals(metadataFormatName)) {
        formatName = metadataFormatName;
    } else {
        String[] extraFormatNames = inData.getExtraMetadataFormatNames();

        if (extraFormatNames != null) {
            for (int i = 0; i < extraFormatNames.length; i++) {
                if (extraFormatNames[i].equals(metadataFormatName)) {
                    formatName = metadataFormatName;
                    break;
                }
            }
        }
    }

    if (formatName == null &&
        inData.isStandardMetadataFormatSupported()) {
        formatName = STANDARD_METADATA_NAME;
    }

    if (formatName != null) {
        try {
            Node root = inData.getAsTree(formatName);
            outData.mergeTree(formatName, root);
        } catch(IIOInvalidTreeException e) {
            // ignore
        }
    }
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
/**
 * Merges {@code inData} into {@code outData}. The supplied
 * metadata format name is attempted first and failing that the standard
 * metadata format name is attempted.
 */
private void convertMetadata(String metadataFormatName,
                             IIOMetadata inData,
                             IIOMetadata outData) {
    String formatName = null;

    String nativeFormatName = inData.getNativeMetadataFormatName();
    if (nativeFormatName != null &&
        nativeFormatName.equals(metadataFormatName)) {
        formatName = metadataFormatName;
    } else {
        String[] extraFormatNames = inData.getExtraMetadataFormatNames();

        if (extraFormatNames != null) {
            for (int i = 0; i < extraFormatNames.length; i++) {
                if (extraFormatNames[i].equals(metadataFormatName)) {
                    formatName = metadataFormatName;
                    break;
                }
            }
        }
    }

    if (formatName == null &&
        inData.isStandardMetadataFormatSupported()) {
        formatName = STANDARD_METADATA_NAME;
    }

    if (formatName != null) {
        try {
            Node root = inData.getAsTree(formatName);
            outData.mergeTree(formatName, root);
        } catch(IIOInvalidTreeException e) {
            // ignore
        }
    }
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
public static void main(String[] args) throws IOException {
    ImageWriter iw =
        (ImageWriter)ImageIO.getImageWritersByFormatName("jpeg").next();

    ImageTypeSpecifier type =
        ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);

    ImageOutputStream ios =
        ImageIO.createImageOutputStream(new File("MergeTreeTest.jpeg"));
    iw.setOutput(ios);

    IIOMetadata meta = iw.getDefaultImageMetadata(type, null);

    boolean isFailed = false;

    String[] fmts = meta.getMetadataFormatNames();
    for (int i=0; i<fmts.length; i++) {
        System.out.print("Format: " + fmts[i] + " ... ");
        Node root = meta.getAsTree(fmts[i]);
        try {
            meta.mergeTree(fmts[i], root);
        } catch (NullPointerException e) {
            throw new RuntimeException("Test failed for format " + fmts[i], e);
        }
        System.out.println("PASSED");
    }
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
public static void test(String mimeType, boolean useStreamMeta,
                        String metaXml, String... boolXpaths)
    throws Exception
{
    BufferedImage img =
        new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);
    ImageWriter iw = ImageIO.getImageWritersByMIMEType(mimeType).next();
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    ImageOutputStream ios = new MemoryCacheImageOutputStream(os);
    iw.setOutput(ios);
    ImageWriteParam param = null;
    IIOMetadata streamMeta = iw.getDefaultStreamMetadata(param);
    IIOMetadata imageMeta =
        iw.getDefaultImageMetadata(new ImageTypeSpecifier(img), param);
    IIOMetadata meta = useStreamMeta ? streamMeta : imageMeta;
    Source src = new StreamSource(new StringReader(metaXml));
    DOMResult dst = new DOMResult();
    transform(src, dst);
    Document doc = (Document)dst.getNode();
    Element node = doc.getDocumentElement();
    String metaFormat = node.getNodeName();

    // Verify that the default metadata gets formatted correctly.
    verify(meta.getAsTree(metaFormat), boolXpaths, false);

    meta.mergeTree(metaFormat, node);

    // Verify that the merged metadata gets formatte correctly.
    verify(meta.getAsTree(metaFormat), boolXpaths, true);

    iw.write(streamMeta, new IIOImage(img, null, imageMeta), param);
    iw.dispose();
    ios.close();
    ImageReader ir = ImageIO.getImageReader(iw);
    byte[] bytes = os.toByteArray();
    if (bytes.length == 0)
        throw new AssertionError("Zero length image file");
    ByteArrayInputStream is = new ByteArrayInputStream(bytes);
    ImageInputStream iis = new MemoryCacheImageInputStream(is);
    ir.setInput(iis);
    if (useStreamMeta) meta = ir.getStreamMetadata();
    else meta = ir.getImageMetadata(0);

    // Verify again after writing and re-reading the image
    verify(meta.getAsTree(metaFormat), boolXpaths, true);
}
 

import javax.imageio.metadata.IIOMetadata; //導入方法依賴的package包/類
private static byte[] createTestPng() throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    BufferedImage img = createTestImage();

    try {
        ImageOutputStream ios = ImageIO.createImageOutputStream(baos);

        ImageWriter w = ImageIO.getImageWritersByFormatName("PNG").next();

        w.setOutput(ios);

        ImageWriteParam p = w.getDefaultWriteParam();

        ImageTypeSpecifier t = ImageTypeSpecifier.createFromRenderedImage(img);

        IIOMetadata m = w.getDefaultImageMetadata(t, p);

        String nativeMetadataFormat = m.getNativeMetadataFormatName();

        Node root = m.getAsTree(nativeMetadataFormat);

        IIOMetadataNode textEntry = new IIOMetadataNode("tEXtEntry");
        textEntry.setAttribute("keyword", "comment");
        textEntry.setAttribute("value", "This is a test image for JDK-6945174");

        IIOMetadataNode text = new IIOMetadataNode("tEXt");
        text.appendChild(textEntry);

        root.appendChild(text);

        m.mergeTree(nativeMetadataFormat, root);

        IIOImage iio_img = new IIOImage(img, null, m);

        w.write(iio_img);

        w.dispose();
        ios.flush();
        ios.close();
    } catch (IOException e) {
        throw new RuntimeException("Test failed.", e);
    }

    baos.flush();

    byte[] data = baos.toByteArray();

    adjustCommentLength(Integer.MAX_VALUE + 0x1000, data);

    return data;
}