/**
 * Copyright 2005-2013 Restlet S.A.S.
 * 
 * The contents of this file are subject to the terms of one of the following
 * open source licenses: Apache 2.0 or LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL
 * 1.0 (the "Licenses"). You can select the license that you prefer but you may
 * not use this file except in compliance with one of these Licenses.
 * 
 * You can obtain a copy of the Apache 2.0 license at
 * http://www.opensource.org/licenses/apache-2.0
 * 
 * You can obtain a copy of the LGPL 3.0 license at
 * http://www.opensource.org/licenses/lgpl-3.0
 * 
 * You can obtain a copy of the LGPL 2.1 license at
 * http://www.opensource.org/licenses/lgpl-2.1
 * 
 * You can obtain a copy of the CDDL 1.0 license at
 * http://www.opensource.org/licenses/cddl1
 * 
 * You can obtain a copy of the EPL 1.0 license at
 * http://www.opensource.org/licenses/eclipse-1.0
 * 
 * See the Licenses for the specific language governing permissions and
 * limitations under the Licenses.
 * 
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly at
 * http://www.restlet.com/products/restlet-framework
 * 
 * Restlet is a registered trademark of Restlet S.A.S.
 */

package org.restlet.ext.wadl;

import static org.restlet.ext.wadl.WadlRepresentation.APP_NAMESPACE;

import java.util.List;
import java.util.Map;

import org.restlet.ext.xml.XmlWriter;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

/**
 * Defines a potential value for a parent parameter description.
 * 
 * @author Jerome Louvel
 */
public class OptionInfo extends DocumentedInfo {

    /** Value of this option element. */
    private String value;

    /**
     * Constructor.
     */
    public OptionInfo() {
        super();
    }

    /**
     * Constructor with a single documentation element.
     * 
     * @param documentation
     *            A single documentation element.
     */
    public OptionInfo(DocumentationInfo documentation) {
        super(documentation);
    }

    /**
     * Constructor with a list of documentation elements.
     * 
     * @param documentations
     *            The list of documentation elements.
     */
    public OptionInfo(List<DocumentationInfo> documentations) {
        super(documentations);
    }

    /**
     * Constructor with a single documentation element.
     * 
     * @param documentation
     *            A single documentation element.
     */
    public OptionInfo(String documentation) {
        super(documentation);
    }

    /**
     * Returns the value of this option element.
     * 
     * @return The value of this option element.
     */
    public String getValue() {
        return this.value;
    }

    /**
     * Sets the value of this option element.
     * 
     * @param value
     *            The value of this option element.
     */
    public void setValue(String value) {
        this.value = value;
    }

    @Override
    public void updateNamespaces(Map<String, String> namespaces) {
        namespaces.putAll(resolveNamespaces());

    }

    /**
     * Writes the current object as an XML element using the given SAX writer.
     * 
     * @param writer
     *            The SAX writer.
     * @throws SAXException
     */
    public void writeElement(XmlWriter writer) throws SAXException {
        final AttributesImpl attributes = new AttributesImpl();
        if ((getValue() != null) && !getValue().equals("")) {
            attributes.addAttribute("", "id", null, "xs:string", getValue());
        }

        if (getDocumentations().isEmpty()) {
            writer.emptyElement(APP_NAMESPACE, "option", null, attributes);
        } else {
            writer.startElement(APP_NAMESPACE, "option", null, attributes);

            for (final DocumentationInfo documentationInfo : getDocumentations()) {
                documentationInfo.writeElement(writer);
            }

            writer.endElement(APP_NAMESPACE, "option");
        }
    }

}