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comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/XYDatasetToZeroMapper.java @ 1824:982956bde69e

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Added a dataset to zero mapper to circumvent shortcommings in XYDifferenceRenderer. flys-artifacts/trunk@3153 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 03 Nov 2011 12:28:38 +0000
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1823:7a11b37d8594 1824:982956bde69e
1 package de.intevation.flys.jfree;
2
3 import java.util.Iterator;
4 import java.util.List;
5 import java.util.ArrayList;
6
7 import org.jfree.data.xy.XYDataset;
8
9 import org.jfree.data.general.DatasetChangeListener;
10 import org.jfree.data.general.DatasetGroup;
11
12 import org.jfree.data.DomainOrder;
13
14 import java.io.Serializable;
15
16 public class XYDatasetToZeroMapper
17 implements Serializable
18 {
19 protected int seriesA;
20 protected int seriesB;
21
22 public class MappedXYDataset implements XYDataset, Serializable {
23
24 protected XYDataset parent;
25
26 public MappedXYDataset() {
27 }
28
29 public MappedXYDataset(XYDataset parent) {
30 this.parent = parent;
31 }
32
33 protected int remap(int series) {
34 switch (series) {
35 case 0: return seriesA;
36 case 1: return seriesB;
37 }
38 return series;
39 }
40
41 @Override
42 public int getSeriesCount() {
43 return seriesA != seriesB ? 2 : 1;
44 }
45
46 @Override
47 public Comparable getSeriesKey(int series) {
48 return parent.getSeriesKey(remap(series));
49 }
50
51 @Override
52 public int indexOf(Comparable seriesKey) {
53 Comparable cmpA = parent.getSeriesKey(seriesA);
54 if (cmpA == seriesKey
55 || (cmpA != null && cmpA.equals(seriesKey))) {
56 return 0;
57 }
58 Comparable cmpB = parent.getSeriesKey(seriesB);
59 if (cmpB == seriesKey
60 || (cmpB != null && cmpB.equals(seriesKey))) {
61 return 1;
62 }
63 return -1;
64 }
65
66 @Override
67 public void addChangeListener(DatasetChangeListener listener) {
68 parent.addChangeListener(listener);
69 }
70
71 @Override
72 public void removeChangeListener(DatasetChangeListener listener) {
73 parent.removeChangeListener(listener);
74 }
75
76 @Override
77 public DatasetGroup getGroup() {
78 return parent.getGroup();
79 }
80
81 @Override
82 public void setGroup(DatasetGroup group) {
83 parent.setGroup(group);
84 }
85
86 @Override
87 public DomainOrder getDomainOrder() {
88 return parent.getDomainOrder();
89 }
90
91 @Override
92 public int getItemCount(int series) {
93 return parent.getItemCount(remap(series));
94 }
95
96 @Override
97 public Number getX(int series, int item) {
98 return parent.getX(remap(series), item);
99 }
100
101 @Override
102 public double getXValue(int series, int item) {
103 return parent.getXValue(remap(series), item);
104 }
105
106 @Override
107 public Number getY(int series, int item) {
108 return parent.getY(remap(series), item);
109 }
110
111 @Override
112 public double getYValue(int series, int item) {
113 return parent.getYValue(remap(series), item);
114 }
115 } // class MappedXYDataset
116
117 public XYDatasetToZeroMapper() {
118 }
119
120 public XYDatasetToZeroMapper(int seriesA) {
121 this(seriesA, seriesA);
122 }
123
124 public XYDatasetToZeroMapper(int seriesA, int seriesB) {
125 this.seriesA = seriesA;
126 this.seriesB = seriesB;
127 }
128
129 public Iterator<XYDataset> iterator(XYDataset dataset) {
130 List<XYDataset> list = new ArrayList<XYDataset>(1);
131 list.add(new MappedXYDataset(dataset));
132 return list.iterator();
133 }
134 }
135 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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