Interval.java

/* 
 * Licensed under the Apache License, Version 2.0 (the "License");
 *
 * You may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributions from 2013-2017 where performed either by US government 
 * employees, or under US Veterans Health Administration contracts. 
 *
 * US Veterans Health Administration contributions by government employees
 * are work of the U.S. Government and are not subject to copyright
 * protection in the United States. Portions contributed by government 
 * employees are USGovWork (17USC §105). Not subject to copyright. 
 * 
 * Contribution by contractors to the US Veterans Health Administration
 * during this period are contractually contributed under the
 * Apache License, Version 2.0.
 *
 * See: https://www.usa.gov/government-works
 * 
 * Contributions prior to 2013:
 *
 * Copyright (C) International Health Terminology Standards Development Organisation.
 * Licensed under the Apache License, Version 2.0.
 *
 */



package sh.isaac.api.util;

/**
 * {@link Interval}.
 *
 * @author <a href="mailto:daniel.armbrust.list@gmail.com">Dan Armbrust</a>
 */
public class Interval {
   /** The right inclusive. */
   private boolean leftInclusive, rightInclusive;

   /** The right. */
   private Number left, right;

   //~--- constructors --------------------------------------------------------

   /**
    * Instantiates a new interval.
    *
    * @param parseFrom the parse from
    * @throws NumberFormatException the number format exception
    */
   public Interval(String parseFrom)
            throws NumberFormatException {
      final String s = parseFrom.trim();

      if (s.charAt(0) == '[') {
         this.leftInclusive = true;
      } else if (s.charAt(0) == '(') {
         this.leftInclusive = false;
      } else {
         throw new NumberFormatException(
             "Invalid INTERVAL definition in the validator definition data - char 0 should be [ or (");
      }

      if (s.charAt(s.length() - 1) == ']') {
         this.rightInclusive = true;
      } else if (s.charAt(s.length() - 1) == ')') {
         this.rightInclusive = false;
      } else {
         throw new NumberFormatException(
             "Invalid INTERVAL definition in the validator definition data - last char should be ] or )");
      }

      String numeric = s.substring(1, s.length() - 1);

      numeric = numeric.replaceAll("\\s", "");

      final int pos = numeric.indexOf(',');

      if (pos == 0) {
         // left is null (- infinity)
         this.right = NumericUtils.parseUnknown(numeric.substring(1, numeric.length()));
      } else if (pos > 0) {
         this.left = NumericUtils.parseUnknown(numeric.substring(0, pos));

         if (numeric.length() > (pos + 1)) {
            this.right = NumericUtils.parseUnknown(numeric.substring(pos + 1));
         }
      } else {
         throw new NumberFormatException("Invalid INTERVAL definition in the validator definition data");
      }

      // make sure interval is properly specified
      if ((this.left != null) && (this.right != null)) {
         if (NumericUtils.compare(this.left, this.right) > 0) {
            throw new NumberFormatException("Invalid INTERVAL definition the left value should be <= the right value");
         }
      }
   }

   /**
    * Instantiates a new interval.
    *
    * @param left the left
    * @param leftInclusive the left inclusive
    * @param right the right
    * @param rightInclusive the right inclusive
    */
   public Interval(Number left, boolean leftInclusive, Number right, boolean rightInclusive) {
      this.left           = left;
      this.right          = right;
      this.leftInclusive  = leftInclusive;
      this.rightInclusive = rightInclusive;
   }

   //~--- get methods ---------------------------------------------------------

   /**
    * Gets the left.
    *
    * @return the left
    */
   public Number getLeft() {
      return this.left;
   }

   /**
    * Checks if left inclusive.
    *
    * @return the leftInclusive
    */
   public boolean isLeftInclusive() {
      return this.leftInclusive;
   }

   /**
    * Gets the right.
    *
    * @return the right
    */
   public Number getRight() {
      return this.right;
   }

   /**
    * Checks if right inclusive.
    *
    * @return the rightInclusive
    */
   public boolean isRightInclusive() {
      return this.rightInclusive;
   }
}