package org.jsoup.nodes;

/**
 * An XML Declaration.
 * 
 * @author Jonathan Hedley, jonathan@hedley.net
 */
public class XmlDeclaration extends Node {
    private static final String DECL_KEY = "declaration";
    private final boolean isProcessingInstruction; // <! if true, <? if false,
                                                   // declaration (and last data
                                                   // char should be ?)

    /**
     * Create a new XML declaration
     * 
     * @param data
     *            data
     * @param baseUri
     *            base uri
     * @param isProcessingInstruction
     *            is processing instruction
     */
    public XmlDeclaration(String data, String baseUri,
            boolean isProcessingInstruction) {
        super(baseUri);
        attributes.put(DECL_KEY, data);
        this.isProcessingInstruction = isProcessingInstruction;
    }

    @Override
    public String nodeName() {
        return "#declaration";
    }

    /**
     * Get the unencoded XML declaration.
     * 
     * @return XML declaration
     */
    public String getWholeDeclaration() {
        return attributes.get(DECL_KEY);
    }

    @Override
    void outerHtmlHead(StringBuilder accum, int depth,
            Document.OutputSettings out) {
        accum.append("<").append(isProcessingInstruction ? "!" : "?")
                .append(getWholeDeclaration()).append(">");
    }

    @Override
    void outerHtmlTail(StringBuilder accum, int depth,
            Document.OutputSettings out) {
    }

    @Override
    public String toString() {
        return outerHtml();
    }
}