poi/poi/src/main/java/org/apache/poi/util/Removal.java

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package org.apache.poi.util;

import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Retention;
import java.lang.annotation.Documented;


/**
 * <p>Program elements annotated &#64;Removal track the earliest final release
 * when a deprecated feature will be removed. This is an internal decoration:
 * a feature may be removed in a release earlier or later than the release
 * number specified by this annotation.</p>
 *
 * <p>The POI project policy is to deprecate an element for 2 final releases
 * before removing. This annotation exists to make it easier to follow up on the
 * second step of the two-step deprecate and remove process.</p>
 *
 * <p>A deprecated feature may be removed in nightly and beta releases prior
 * to the final release for which it is eligible, but may be removed later for
 * various reasons. If it is known in advance that the feature will not be
 * removed in the n+2 release, a later version should be specified by this
 * annotation. The annotation version number should not include beta</p>
 *
 * <p>For example, a feature with a {@code @deprecated POI 3.15 beta 3}
 * is deprecated in POI 3.15 and 3.16 and becomes eligible for deletion during
 * the POI 3.17 release series, and may be deleted immediately after POI 3.16 is
 * released. This would be annotated {@code @Removal(version="3.17")}</p>.
 *
 * @since POI-3.15 beta 3
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface Removal {
    /**
     * The POI version when this feature may be removed.
     *
     * To ensure that the version number can be compared to the current version
     * and a unit test can generate a warning if a removal-eligible feature has
     * not been removed yet, the version number should adhere to the following format:
     * <pre>{@code
     * Format: "(?<major>\d+)\.(?<minor>\d+)"
     * Example: "3.15"
     * }</pre>
     */
    String version() default "";
    // TODO: Verify that the version syntax is valid by parsing with a version-aware parser like
    // org.apache.maven.artifact.versioning.DefaultArtifactVersion
}