Java 类org.dom4j.Comment 实例源码

/**
 * Remove comments from XML
 *
 * @param document
 * @throws IOException
 * @throws DocumentException
 */
private static void removeComments(Document document) throws IOException, DocumentException {
    Visitor visitor = new VisitorSupport() {

        @Override
        public void visit(Comment comment) {
            comment.setText(" ");
        }
    };
    document.accept(visitor);
}

public void assertNodesEqual( Node n1, Node n2 ) {
    int nodeType1 = n1.getNodeType();
    int nodeType2 = n2.getNodeType();
    assertTrue( "Nodes are of same type: ", nodeType1 == nodeType2 );

    switch (nodeType1) {
        case Node.ELEMENT_NODE:
            assertNodesEqual((Element) n1, (Element) n2);
            break;
        case Node.DOCUMENT_NODE:
            assertNodesEqual((Document) n1, (Document) n2);
            break;
        case Node.ATTRIBUTE_NODE:
            assertNodesEqual((Attribute) n1, (Attribute) n2);
            break;
        case Node.TEXT_NODE:
            assertNodesEqual((Text) n1, (Text) n2);
            break;
        case Node.CDATA_SECTION_NODE:
            assertNodesEqual((CDATA) n1, (CDATA) n2);
            break;
        case Node.ENTITY_REFERENCE_NODE:
            assertNodesEqual((Entity) n1, (Entity) n2);
            break;
        case Node.PROCESSING_INSTRUCTION_NODE:
            assertNodesEqual((ProcessingInstruction) n1, (ProcessingInstruction) n2);
            break;
        case Node.COMMENT_NODE:
            assertNodesEqual((Comment) n1, (Comment) n2);
            break;
        case Node.DOCUMENT_TYPE_NODE:
            assertNodesEqual((DocumentType) n1, (DocumentType) n2);
            break;
        case Node.NAMESPACE_NODE:
            assertNodesEqual((Namespace) n1, (Namespace) n2);
            break;
        default:
            assertTrue( "Invalid node types. node1: " + n1 + " and node2: " + n2, false );
    }
}

/**
 * Print the given element using the given print writer and initial 
 * indention
 * @param elem      the xml element
 * @param indention the initial indention
 * @param writer    the print writer to use for the output
 */
@SuppressWarnings("unchecked")
public void print(Element elem, String indention, PrintWriter writer) {
    writer.print(indention + "<" + elem.getName());

    Iterator<Attribute> itAtt   = elem.attributeIterator();
    Iterator<Element>   itElem  = elem.elementIterator();

    if (elem.hasMixedContent() || (elem.hasContent() && !itElem.hasNext())) {
        Iterator<Node> it = elem.nodeIterator();
        while (it.hasNext()) {
            Node node = it.next();
            if (node instanceof CharacterData) {                    
                if (!(node instanceof Comment) && node.getText().trim().length() != 0) {
                    throw new IllegalArgumentException("text content not supported: \"" + node.getText() + "\"");                       
                }
            }
            else if (!(node instanceof Element || node instanceof Attribute)) {
                throw new IllegalArgumentException("only attributes and elements are supported");                   
            }
        }
    }
    while (itAtt.hasNext()) {
        Attribute att = itAtt.next();
        final String attName    = att.getName();
        final String attValue   = att.getValue();
        writer.print(" " + attName + "=\"" + escapeAttributeValue(attValue) + "\"");
    }
    if (!itElem.hasNext()) {
        writer.println("/>");
    }
    else {
        writer.println(">");
        while (itElem.hasNext()) {
            print(itElem.next(), indention + getIndention(), writer);
        }
        writer.println(indention + "</" + elem.getName() + ">");            
    }
    writer.flush();
}

public void add(Comment comment) {
    element.add( comment );
}

public boolean remove(Comment comment) {
    return element.remove( comment );
}

protected void writeElement(Element element) throws IOException {
    int size = element.nodeCount();
    String qualifiedName = element.getQualifiedName();

    writePrintln();
    indent();

    writer.write("<");
    writer.write(qualifiedName);

    boolean textOnly = true;

    for (int i = 0; i < size; i++) {
        Node node = element.node(i);
        if (node instanceof Element) {
            textOnly = false;
        } else if (node instanceof Comment) {
            textOnly = false;
        }
    }

    writeAttributes(element);

    lastOutputNodeType = Node.ELEMENT_NODE;

    if (size <= 0) {
        writeEmptyElementClose(qualifiedName);
    } else {
        writer.write(">");

        if (textOnly) {
            // we have at least one text node so lets assume
            // that its non-empty
            writeElementContent(element);
        } else {
            if (element.attributeCount() > 3)
                writePrintln();
            // we know it's not null or empty from above
            ++indentLevel;

            writeElementContent(element);

            --indentLevel;

            writePrintln();
            indent();
        }

        writer.write("</");
        writer.write(qualifiedName);
        writer.write(">");
    }
    if (element.attributeCount() > 2 && indentLevel > 0)
        writePrintln();

    lastOutputNodeType = Node.ELEMENT_NODE;
}

public void add(Comment comment) {
    getWrapped().add(comment);
}

public boolean remove(Comment comment) {
    return getWrapped().remove(comment);
}

protected void writeElement(Element element) throws IOException {
    int size = element.nodeCount();
    String qualifiedName = element.getQualifiedName();

    writePrintln();
    indent();

    writer.write("<");
    writer.write(qualifiedName);

    int previouslyDeclaredNamespaces = namespaceStack.size();
    Namespace ns = element.getNamespace();

    if (isNamespaceDeclaration(ns)) {
        namespaceStack.push(ns);
        writeNamespace(ns);
    }

    // Print out additional namespace declarations
    boolean textOnly = true;

    for (int i = 0; i < size; i++) {
        Node node = element.node(i);

        if (node instanceof Namespace) {
            Namespace additional = (Namespace) node;

            if (isNamespaceDeclaration(additional)) {
                namespaceStack.push(additional);
                writeNamespace(additional);
            }
        } else if (node instanceof Element) {
            textOnly = false;
        } else if (node instanceof Comment) {
            textOnly = false;
        }
    }

    writeAttributes(element);

    lastOutputNodeType = Node.ELEMENT_NODE;

    if (size <= 0) {
        writeEmptyElementClose(qualifiedName);
    } else {
        writer.write(">");

        if (textOnly) {
            // we have at least one text node so lets assume
            // that its non-empty
            writeElementContent(element);
        } else {
            // we know it's not null or empty from above
            ++indentLevel;

            writeElementContent(element);

            --indentLevel;

            writePrintln();
            indent();
        }

        writer.write("</");
        writer.write(qualifiedName);
        writer.write(">");
    }

    // remove declared namespaceStack from stack
    while (namespaceStack.size() > previouslyDeclaredNamespaces) {
        namespaceStack.pop();
    }

    lastOutputNodeType = Node.ELEMENT_NODE;
}

public void add(Comment comment) {
    element.add( comment );
}

public boolean remove(Comment comment) {
    return element.remove( comment );
}

public void add(Comment comment) {
    target().add( comment );
}

public boolean remove(Comment comment) {
    return target().remove( comment );
}

protected void writeElement(Element element) throws IOException {
    int size = element.nodeCount();
    String qualifiedName = element.getQualifiedName();

    writePrintln();
    indent();

    writer.write("<");
    writer.write(qualifiedName);

    boolean textOnly = true;

    for (int i = 0; i < size; i++) {
        Node node = element.node(i);
        if (node instanceof Element) {
            textOnly = false;
        } else if (node instanceof Comment) {
            textOnly = false;
        }
    }

    writeAttributes(element);

    lastOutputNodeType = Node.ELEMENT_NODE;

    if (size <= 0) {
        writeEmptyElementClose(qualifiedName);
    } else {
        writer.write(">");

        if (textOnly) {
            // we have at least one text node so lets assume
            // that its non-empty
            writeElementContent(element);
        } else {
            if (element.attributeCount() > 3)
                writePrintln();
            // we know it's not null or empty from above
            ++indentLevel;

            writeElementContent(element);

            --indentLevel;

            writePrintln();
            indent();
        }

        writer.write("</");
        writer.write(qualifiedName);
        writer.write(">");
    }
    if (element.attributeCount() > 2 && indentLevel > 0)
        writePrintln();

    lastOutputNodeType = Node.ELEMENT_NODE;
}

public boolean isComment(Object obj)
{
    return obj instanceof Comment;
}

public String getCommentStringValue(Object obj)
{
    Comment cmt = (Comment) obj;

    return cmt.getText();
}

/**
 * Writes the given {@link Comment}.
 * 
 * @param comment
 *            <code>Comment</code> to output.
 * 
 * @throws IOException
 *             DOCUMENT ME!
 */
public void write(Comment comment) throws IOException {
    writeComment(comment.getText());

    if (autoFlush) {
        flush();
    }
}