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package org.apache.juneau;

import org.apache.juneau.reflect.*;

/**
 * A unit of work for applying an annotation to a context builder.
 *
 * <p>
 * Consists of a pair of objects:
 * <ul>
 * 	<li>{@link AnnotationInfo} - The annotation being applied.
 * 	<li>{@link AnnotationApplier} - The applier for that annotation.
 * </ul>
 *
 * <ul class='seealso'>
 * 	<li class='extlink'>{@source}
 * </ul>
 */
@SuppressWarnings("rawtypes")
public class AnnotationWork {
	final AnnotationInfo annotation;
	final AnnotationApplier applier;

	/**
	 * Constructor.
	 *
	 * @param annotation The annotation being applied.
	 * @param applier The applier for that annotation.
	 */
	public AnnotationWork(AnnotationInfo annotation, AnnotationApplier applier) {
		this.annotation = annotation;
		this.applier = applier;
	}

	/**
	 * Returns <jk>true</jk> if the annotation in this work can be applied to the specified builder.
	 *
	 * @param builder The builder.
	 * @return <jk>true</jk> if the annotation in this work can be applied to the specified builder.
	 */
	public boolean canApply(Object builder) {
		return applier.canApply(builder);
	}

	/**
	 * Calls {@link AnnotationApplier#apply(AnnotationInfo, Object)} on the specified builder.
	 *
	 * <p>
	 * A no-op if {@link AnnotationApplier#canApply(Object)} returns <jk>false</jk>.
	 *
	 * @param builder The builder.
	 */
	@SuppressWarnings("unchecked")
	public void apply(Object builder) {
		if (canApply(builder))
			applier.apply(annotation, builder);
	}
}
