Mercurial > dive4elements > river
changeset 6821:1c3b2f7dc9a4
S/Q relation: Added forgotten class.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Wed, 14 Aug 2013 11:01:16 +0200 (2013-08-14) |
parents | f48d45e760d0 |
children | 330ea2915168 |
files | artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/LogSQ.java |
diffstat | 1 files changed, 68 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/LogSQ.java Wed Aug 14 11:01:16 2013 +0200 @@ -0,0 +1,68 @@ +/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde + * Software engineering by Intevation GmbH + * + * This file is Free Software under the GNU AGPL (>=v3) + * and comes with ABSOLUTELY NO WARRANTY! Check out the + * documentation coming with Dive4Elements River for details. + */ + +package org.dive4elements.river.artifacts.model.sq; + +public class LogSQ extends SQ { + + public static final View LOG_SQ_VIEW = new View() { + @Override + public double getS(SQ sq) { + return ((LogSQ)sq).getLogS(); + } + + @Override + public double getQ(SQ sq) { + return ((LogSQ)sq).getLogQ(); + } + }; + + public static final Factory LOG_SQ_FACTORY = new Factory() { + @Override + public SQ createSQ(double s, double q) { + return new LogSQ(s, q); + } + }; + + protected double logS; + protected double logQ; + + protected boolean logTrans; + + public LogSQ() { + } + + public LogSQ(double s, double q) { + super(s, q); + } + + /** important: We cannot process negative s/q. */ + @Override + public boolean isValid() { + return super.isValid() && s > 0d && q > 0d; + } + + protected void ensureLogTrans() { + if (!logTrans) { + logTrans = true; + logS = Math.log(s); + logQ = Math.log(q); + } + } + + public double getLogS() { + ensureLogTrans(); + return logS; + } + + public double getLogQ() { + ensureLogTrans(); + return logQ; + } +} +