[Tomcat Wiki] Update of "FilterMetaInfo" by xxd82329

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The following page has been changed by xxd82329:
http://wiki.apache.org/tomcat/FilterMetaInfo

New page:
/**
 * some meta-info for filters, such as the configured level (engine/host, etc), 
and the
 * order it being configured in the config file.
 * 
 * @author xxd
 * 
 */
public class FilterMetaInfo implements Comparable<FilterMetaInfo> {

        // -------------------- Level for filters ----------
        public static enum FilterLevels {
                ENGINE("engine"), HOST("host"), CONTEXT("context"), 
WRAPPER("wrapper");
                private final String readableName;

                private FilterLevels(String readableName) {
                        this.readableName = readableName;
                }

                /*
                 * (non-Javadoc)
                 * 
                 * @see java.lang.Enum#toString()
                 */
                @Override
                public String toString() {
                        return this.readableName;
                }
        }

        private final FilterLevels level;

        private final int order;

        public FilterMetaInfo(FilterLevels level, int order) {
                super();
                this.level = level;
                this.order = order;
        }

        /**
         * @return the level
         */
        public FilterLevels getLevel() {
                return level;
        }

        /**
         * @return the order
         */
        public int getOrder() {
                return order;
        }

        private int compareOrder(int order1, int order2) {
                return (order1 < order2 ? -1 : (order1 == order2 ? 0 : 1));
        }

        @Override
        public int compareTo(FilterMetaInfo o) {
                if (o.level != this.level) {
                        return compareOrder(this.order, o.order);
                } else {
                        return this.level.compareTo(o.level);
                }
        }
}

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