Example usage for com.google.gwt.xml.client Document createComment

Introduction

In this page you can find the example usage for com.google.gwt.xml.client Document createComment.

Prototype

Comment createComment(String data);

Source Link

Document

This method creates a new Comment.

Usage

From source file:com.sensia.gwt.relaxNG.RNGInstanceWriter.java

License:Open Source License

protected String writeRNGTag(RNGTag tag, Document dom, Node parentNode) {
    String text = null;//from www .  j  av  a2 s . com
    String error = null;

    if (tag instanceof RNGElement) {
        RNGElement elt = (RNGElement) tag;
        Element newElt = dom.createElement(getFullName(elt.getNamespace(), elt.getName()));
        parentNode.appendChild(newElt);
        ensureNamespaceDecl(elt.getNamespace());
        for (RNGTag child : elt.getChildren())
            writeRNGTag(child, dom, newElt);
    }

    else if (tag instanceof RNGAttribute) {
        RNGAttribute att = (RNGAttribute) tag;
        String name = getFullName(att.getNamespace(), att.getName());
        String value = writeRNGTag(att.getChildren().get(0), dom, null);
        ((Element) parentNode).setAttribute(name, value);
        ensureNamespaceDecl(att.getNamespace());
    }

    else if (tag instanceof RNGGroup) {
        RNGGroup grp = (RNGGroup) tag;
        for (RNGTag child : grp.getChildren())
            writeRNGTag(child, dom, parentNode);
    }

    else if (tag instanceof RNGOptional) {
        RNGOptional opt = (RNGOptional) tag;
        if (opt.isSelected())
            for (RNGTag child : opt.getChildren())
                writeRNGTag(child, dom, parentNode);
    }

    else if (tag instanceof RNGChoice) {
        RNGChoice choice = (RNGChoice) tag;
        if (choice.isSelected())
            text = writeRNGTag(choice.getSelectedPattern(), dom, parentNode);
        else
            error = NO_CHOICE;
    }

    else if (tag instanceof RNGZeroOrMore) {
        RNGZeroOrMore multiple = (RNGZeroOrMore) tag;
        for (List<RNGTag> tagList : multiple.getPatternInstances()) {
            for (RNGTag item : tagList)
                text = writeRNGTag(item, dom, parentNode);
        }
    }

    else if (tag instanceof RNGList) {
        RNGList list = (RNGList) tag;
        StringBuilder buf = new StringBuilder();

        for (RNGTag child : list.getChildren()) {
            String val = writeRNGTag(child, dom, null);
            if (val != null) {
                buf.append(val);
                buf.append(' ');
            }
        }

        if (buf.length() > 0)
            text = buf.toString();
    }

    else if (tag instanceof RNGRef) {
        RNGRef ref = (RNGRef) tag;
        if (ref.getPattern() != null) {
            for (RNGTag child : ref.getPattern().getChildren())
                writeRNGTag(child, dom, parentNode);
        } else
            error = NO_REF;
    }

    else if (tag instanceof RNGValue) {
        text = ((RNGValue) tag).getText();
        if (text == null)
            error = NO_VALUE;
    }

    else if (tag instanceof RNGText) {
        text = ((RNGText) tag).getText();
        if (text == null)
            error = NO_VALUE;
    }

    else if (tag instanceof RNGData<?>) {
        Object val = ((RNGData<?>) tag).getValue();
        if (val != null)
            text = val.toString();
        else
            error = NO_VALUE;
    }

    // deal with text nodes or attribute values
    if (text != null && text.length() > 0) {
        if (parentNode != null) {
            Text node = dom.createTextNode(text);
            parentNode.appendChild(node);
        } else
            return text;
    }

    // deal with error text
    if (error != null) {
        if (parentNode != null) {
            Comment c = dom.createComment(error);
            parentNode.appendChild(c);
        } else
            return error;
    }

    return null;
}

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