teichmann@5844: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5844:  * Software engineering by Intevation GmbH
teichmann@5844:  *
teichmann@5992:  * This file is Free Software under the GNU AGPL (>=v3)
teichmann@5844:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5992:  * documentation coming with Dive4Elements River for details.
teichmann@5844:  */
teichmann@5844: 
teichmann@5829: package org.dive4elements.river.importer;
sascha@185: 
teichmann@5829: import org.dive4elements.river.model.Range;
teichmann@5829: import org.dive4elements.river.model.River;
sascha@188: 
sascha@188: import java.math.BigDecimal;
sascha@188: 
sascha@188: import org.apache.log4j.Logger;
sascha@188: 
felix@4713: /** A range that is about to be imported. */
sascha@185: public class ImportRange
sascha@186: implements   Comparable<ImportRange>
sascha@185: {
teichmann@8200:     /** Private log. */
sascha@188:     private static Logger log = Logger.getLogger(ImportRange.class);
sascha@188: 
sascha@189:     protected BigDecimal a;
sascha@189:     protected BigDecimal b;
sascha@188: 
sascha@188:     protected Range peer;
sascha@185: 
sascha@185:     public ImportRange() {
sascha@185:     }
sascha@185: 
tom@8412:     public ImportRange(BigDecimal a) {
tom@8412:         this.a = a;
tom@8412:         this.b = null;
tom@8412:     }
tom@8412: 
sascha@189:     public ImportRange(BigDecimal a, BigDecimal b) {
tom@7003: 
teichmann@7376:         // enforce a<b and set only a for zero-length ranges
tom@7003:         if (a != null && b == null) {
tom@7003:             this.a = a;
tom@7003:             this.b = null;
tom@7003:         }
tom@7003:         else if (a == null && b != null) {
tom@7003:             this.a = b;
tom@7003:             this.b = null;
tom@7003:         }
tom@7003:         else if (a == null && b == null) {
tom@7003:             throw new IllegalArgumentException("Both a and b are null.");
tom@7003:         }
tom@7003:         else if (a == b) {
tom@7003:             this.a = a;
tom@7003:             this.b = null;
tom@7003:         }
tom@7003:         else {
tom@7221:             if (a.compareTo(b) > 0) {
teichmann@7376:                 BigDecimal t = a; a = b; b = t;
tom@7003:             }
tom@7003:             this.a = a;
tom@7003:             this.b = b;
tom@7003:         }
sascha@186:     }
sascha@186: 
sascha@189:     private static final int compare(BigDecimal a, BigDecimal b) {
sascha@186:         if (a == null && b == null) {
sascha@186:             return 0;
sascha@186:         }
sascha@186:         if (a == null && b != null) {
sascha@186:             return -1;
sascha@186:         }
sascha@186:         if (a != null && b == null) {
sascha@186:             return +1;
sascha@186:         }
sascha@186:         return a.compareTo(b);
sascha@186:     }
sascha@186: 
sascha@186:     public int compareTo(ImportRange other) {
sascha@189:         int cmp = compare(a, other.a);
sascha@186:         if (cmp != 0) return cmp;
sascha@189:         return compare(b, other.b);
sascha@185:     }
sascha@185: 
sascha@189:     public BigDecimal getA() {
sascha@189:         return a;
sascha@185:     }
sascha@185: 
sascha@189:     public void setA(BigDecimal a) {
tom@7221:         if (this.b != null && a.compareTo(b) >= 0) {
tom@8856:             throw new IllegalArgumentException(
tom@8856:                 "a (" + a + ") must be smaller than b (" + b + ").");
tom@7221:         }
teichmann@7376:         this.a = a;
sascha@185:     }
sascha@185: 
sascha@189:     public BigDecimal getB() {
sascha@189:         return b;
sascha@189:     }
sascha@189: 
sascha@189:     public void setB(BigDecimal b) {
tom@7221:         if (b != null && b.compareTo(a) <= 0) {
tom@8856:             throw new IllegalArgumentException(
tom@8856:                 "b (" + b + ") must be greater than a (" + a + ") or null.");
tom@7221:         }
teichmann@7376:         this.b = b;
sascha@185:     }
sascha@188: 
sascha@188:     public Range getPeer(River river) {
sascha@188:         if (peer == null) {
sascha@500:             peer = ImporterSession.getInstance().getRange(river, a, b);
sascha@188:         }
sascha@188:         return peer;
sascha@188:     }
sascha@185: }
sascha@185: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :