Mercurial > dive4elements > river
diff flys-client/src/main/java/org/dive4elements/river/client/shared/DoubleUtils.java @ 5834:f507086aa94b
Repaired internal references.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Thu, 25 Apr 2013 12:31:32 +0200 |
parents | flys-client/src/main/java/de/intevation/flys/client/shared/DoubleUtils.java@51ed89b754ae |
children | 821a02bbfb4e |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/org/dive4elements/river/client/shared/DoubleUtils.java Thu Apr 25 12:31:32 2013 +0200 @@ -0,0 +1,81 @@ +package de.intevation.flys.client.shared; + + +public final class DoubleUtils { + + public static final String DEFAULT_DELIM = " "; + + + private DoubleUtils() { + } + + + public static Double getDouble(String value) { + try { + return Double.valueOf(value); + } + catch (NumberFormatException nfe) { + // do nothing + } + + return null; + } + + + public static double[] getMinMax(String value) { + return getMinMax(value, DEFAULT_DELIM); + } + + + public static double[] getMinMax(String value, String delim) { + if (value == null) { + return null; + } + + String[] values = value.split(delim); + + int len = values != null ? values.length : 0; + double[] mm = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE }; + + for (int i = 0; i < len; i++) { + Double d = getDouble(values[i]); + + if (d != null) { + mm[0] = mm[0] < d ? mm[0] : d; + mm[1] = mm[1] > d ? mm[1] : d; + } + } + + return mm[0] != Double.MAX_VALUE && mm[1] != -Double.MAX_VALUE + ? mm + : null; + } + + /** toIndex is not inclusive, fromIndex is. */ + static void fill(double[] array, int fromIndex, int toIndex, double val) { + for (int i = fromIndex; i < toIndex; i++) { + array[i] = val; + } + } + + /** @see java.util.Arrays.copyOf */ + public static double[] copyOf(double[] toCopy, int newLen) { + double[] nArray = new double[newLen]; + + if (toCopy == null) { + fill(nArray, 0, nArray.length, 0d); + return nArray; + } + + int goTo = (newLen < toCopy.length) + ? newLen + : toCopy.length; + + for (int i = 0; i < goTo; i++) { + nArray[i] = toCopy[i]; + } + fill (nArray, goTo, nArray.length, 0d); + return nArray; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :