Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/model/FixingsColumn.java @ 7471:fff862f4ef76
Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time.
Hopefully this improves the overall speed of loading data from the datacage.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | af13ceeba52a |
children |
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/* 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; import org.dive4elements.river.artifacts.math.Linear; import java.util.Arrays; import java.io.Serializable; public class FixingsColumn implements Serializable { protected double [] kms; protected double [] ws; protected QRangeTree qs; public FixingsColumn() { } public FixingsColumn( double [] kms, double [] ws, QRangeTree qs ) { this.kms = kms; this.ws = ws; this.qs = qs; } public boolean getW(double km, double [] w) { return getW(km, w, 0); } public boolean getW(double km, double [] w, int index) { if (kms.length == 0 || km < kms[0] || km > kms[kms.length-1]) { w[index] = Double.NaN; return true; } int idx = Arrays.binarySearch(kms, km); if (idx >= 0) { w[index] = ws[idx]; return true; } idx = -idx - 1; w[index] = Linear.linear(km, kms[idx-1], kms[idx], ws[idx-1], ws[idx]); return false; } public double getQ(double km) { return qs.findQ(km); } public QRangeTree getQRanges() { return qs; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :