Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/LevelOrderIndices.java @ 784:7b81d563c8c0

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Improved date input validation. A given date needs to be in a specific range (issue212). gnv-artifacts/trunk@866 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 30 Mar 2010 09:17:53 +0000
parents c4156275c1e1
children cdade5005cba
rev   line source
450
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.gnv.jfreechart;
20a480753ff9 Render labels in vertical cross section charts.
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2
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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3 import java.util.LinkedList;
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4
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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5 /**
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c4156275c1e1 Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 450
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6 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
450
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7 */
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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8 public class LevelOrderIndices
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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9 {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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10 public interface Visitor {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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11 Object visit(int index);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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12 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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14 protected int from;
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15 protected int to;
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16
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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17 public LevelOrderIndices() {
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18 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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19
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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20 public LevelOrderIndices(int to) {
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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21 this(0, to);
20a480753ff9 Render labels in vertical cross section charts.
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22 }
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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23
20a480753ff9 Render labels in vertical cross section charts.
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24 public LevelOrderIndices(int from, int to) {
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25 this.from = Math.min(from, to);
20a480753ff9 Render labels in vertical cross section charts.
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26 this.to = Math.max(from, to);
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27 }
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28
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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29 public Object visit(Visitor visitor) {
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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30 LinkedList<int[]> queue = new LinkedList<int[]>();
20a480753ff9 Render labels in vertical cross section charts.
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31
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32 queue.add(new int [] { from, to });
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33
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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34 while (!queue.isEmpty()) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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35 int [] pair = queue.remove();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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36
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37 int mid = (pair[0] + pair[1]) >> 1;
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38
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39 Object result = visitor.visit(mid);
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40
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41 if (result != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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42 return result;
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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43 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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44
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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45 if (mid-1 >= pair[0]) {
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46 queue.add(new int [] { pair[0], mid-1 });
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47 }
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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48
20a480753ff9 Render labels in vertical cross section charts.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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49 if (mid+1 <= pair[1]) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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50 pair[0] = mid+1;
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51 queue.add(pair);
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52 }
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53 }
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54
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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55 return null;
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56 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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57 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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58 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org