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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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package org.apache.juneau.xml;

import static org.apache.juneau.internal.CollectionUtils.*;

import java.util.*;

import org.apache.juneau.*;
import org.apache.juneau.xml.annotation.*;

/**
 * Metadata on classes specific to the XML serializers and parsers pulled from the {@link Xml @Xml} annotation on the
 * class.
 *
 * <h5 class='section'>See Also:</h5><ul>
 * 	<li class='link'><a class="doclink" href="../../../../index.html#jm.XmlDetails">XML Details</a>
 * </ul>
 */
public class XmlClassMeta extends ExtendedClassMeta {

	private final Namespace namespace;
	private final XmlFormat format;
	private final String childName;

	/**
	 * Constructor.
	 *
	 * @param cm The class that this annotation is defined on.
	 * @param mp XML metadata provider (for finding information about other artifacts).
	 */
	public XmlClassMeta(ClassMeta<?> cm, XmlMetaProvider mp) {
		super(cm);
		List<Xml> xmls = list();
		List<XmlSchema> schemas = list();
		if (cm != null) {
			cm.forEachAnnotation(Xml.class, x -> true, x -> xmls.add(x));
			cm.forEachAnnotation(XmlSchema.class, x -> true, x -> schemas.add(x));
		}
		this.namespace = XmlUtils.findNamespace(xmls, schemas);

		String _childName = null;
		XmlFormat _format = XmlFormat.DEFAULT;
		for (Xml a : xmls) {
			if (a.format() != XmlFormat.DEFAULT)
				_format = a.format();
			if (! a.childName().isEmpty())
				_childName = a.childName();
		}
		this.format = _format;
		this.childName = _childName;
	}

	/**
	 * Returns the {@link Xml#format() @Xml(format)} annotation defined on the class.
	 *
	 * @return The value of the annotation, or {@link XmlFormat#DEFAULT} if not specified.
	 */
	protected XmlFormat getFormat() {
		return format;
	}

	/**
	 * Returns the {@link Xml#childName() @Xml(childName)} annotation defined on the class.
	 *
	 * @return The value of the annotation, or <jk>null</jk> if not specified.
	 */
	protected String getChildName() {
		return childName;
	}

	/**
	 * Returns the XML namespace associated with this class.
	 *
	 * <p>
	 * Namespace is determined in the following order of {@link Xml#prefix() @Xml(prefix)} annotation:
	 * <ol>
	 * 	<li>Class.
	 * 	<li>Package.
	 * 	<li>Superclasses.
	 * 	<li>Superclass packages.
	 * 	<li>Interfaces.
	 * 	<li>Interface packages.
	 * </ol>
	 *
	 * @return The namespace associated with this class, or <jk>null</jk> if no namespace is associated with it.
	 */
	public Namespace getNamespace() {
		return namespace;
	}
}
