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package org.apache.juneau.json;

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

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

/**
 * Metadata on classes specific to the JSON serializers and parsers pulled from the {@link Json @Json} annotation on
 * the class.
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc jm.JsonDetails}
 * 	<li class='extlink'>{@source}
 * </ul>
 */
public class JsonClassMeta extends ExtendedClassMeta {

	private final String wrapperAttr;

	/**
	 * Constructor.
	 *
	 * @param cm The class that this annotation is defined on.
	 * @param mp JSON metadata provider (for finding information about other artifacts).
	 */
	public JsonClassMeta(ClassMeta<?> cm, JsonMetaProvider mp) {
		super(cm);

		Value<String> wrapperAttr = Value.empty();
		cm.forEachAnnotation(Json.class, x -> isNotEmpty(x.wrapperAttr()), x -> wrapperAttr.set(x.wrapperAttr()));
		this.wrapperAttr = wrapperAttr.orElse(null);
	}

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