1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/**
* Copyright (c) 2014, University of Warsaw
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package pl.edu.mimuw.cloudatlas.interpreter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import pl.edu.mimuw.cloudatlas.model.Attribute;
import pl.edu.mimuw.cloudatlas.model.Type;
import pl.edu.mimuw.cloudatlas.model.TypeCollection;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueList;
import pl.edu.mimuw.cloudatlas.model.ValueNull;
import pl.edu.mimuw.cloudatlas.model.ZMI;
public class Table implements Iterable<TableRow> {
private final List<String> columns = new ArrayList<String>();
private final Map<String, Integer> headersMap = new HashMap<String, Integer>();
private final List<TableRow> rows = new ArrayList<TableRow>();
// creates whole table based on a given ZMI
public Table(ZMI zmi) {
Set<String> allColumns = new HashSet<String>();
for(ZMI z : zmi.getSons())
for(Entry<Attribute, Value> e : z.getAttributes())
allColumns.add(e.getKey().getName());
columns.addAll(allColumns);
int i = 0;
for(String c : columns)
headersMap.put(c, i++);
for(ZMI z : zmi.getSons()) {
Value[] row = new Value[columns.size()];
for(int j = 0; j < row.length; ++j)
row[j] = ValueNull.getInstance();
for(Entry<Attribute, Value> e : z.getAttributes())
row[getColumnIndex(e.getKey().getName())] = e.getValue();
appendRow(new TableRow(row));
}
}
// creates an empty table with same columns as given
public Table(Table table) {
this.columns.addAll(table.columns);
this.headersMap.putAll(table.headersMap);
}
public List<String> getColumns() {
return Collections.unmodifiableList(columns);
}
public void appendRow(TableRow row) {
if(row.getSize() != columns.size())
throw new InternalInterpreterException("Cannot append row. Length expected: " + columns.size() + ", got: "
+ row.getSize() + ".");
rows.add(row);
}
public int getColumnIndex(String column) {
try {
return headersMap.get(column).intValue();
} catch(NullPointerException exception) {
throw new NoSuchAttributeException(column);
}
}
public ValueList getColumn(String column) {
if(column.startsWith("&")) {
throw new NoSuchAttributeException(column);
}
try {
int position = headersMap.get(column);
List<Value> result = new ArrayList<Value>();
for(TableRow row : rows) {
Value v = row.getIth(position);
result.add(v);
}
Type elementType = TypeCollection.computeElementType(result);
return new ValueList(result, elementType);
} catch(NullPointerException exception) {
throw new NoSuchAttributeException(column);
}
}
@Override
public Iterator<TableRow> iterator() {
return rows.iterator();
}
public void sort(Comparator<TableRow> comparator) {
Collections.sort(rows, comparator);
}
}
|