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1
28 package net.sf.jasperreports.engine.data;
29
30 import java.util.Collection  ;
31 import java.util.Iterator ;
32 import java.util.Map ;
33
34 import net.sf.jasperreports.engine.JRField;
35 import net.sf.jasperreports.engine.JRRewindableDataSource;
36
37
41 public class JRMapCollectionDataSource implements JRRewindableDataSource
42 {
43
44
47 private Collection records = null;
48 private Iterator iterator = null;
49 private Map currentRecord = null;
50
51
52
55 public JRMapCollectionDataSource(Collection col)
56 {
57 records = col;
58
59 if (records != null)
60 {
61 iterator = records.iterator();
62 }
63 }
64
65
66
69 public boolean next()
70 {
71 boolean hasNext = false;
72
73 if (iterator != null)
74 {
75 hasNext = iterator.hasNext();
76
77 if (hasNext)
78 {
79 currentRecord = (Map )iterator.next();
80 }
81 }
82
83 return hasNext;
84 }
85
86
87
90 public Object getFieldValue(JRField field)
91 {
92 Object value = null;
93
94 if (currentRecord != null)
95 {
96 value = currentRecord.get(field.getName());
97 }
98
99 return value;
100 }
101
102
103
106 public void moveFirst()
107 {
108 if (records != null)
109 {
110 iterator = records.iterator();
111 }
112 }
113
114
115 }
116 |
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