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Added apache header and fixed checkstyle error
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Lines changed: 65 additions & 42 deletions

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‎src/main/java/org/apache/commons/collections4/MapBuilder.java‎

Lines changed: 38 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -1,8 +1,28 @@
1+
/*
2+
* Licensed to the Apache Software Foundation (ASF) under one or more
3+
* contributor license agreements. See the NOTICE file distributed with
4+
* this work for additional information regarding copyright ownership.
5+
* The ASF licenses this file to You under the Apache License, Version 2.0
6+
* (the "License"); you may not use this file except in compliance with
7+
* the License. You may obtain a copy of the License at
8+
*
9+
* http://www.apache.org/licenses/LICENSE-2.0
10+
*
11+
* Unless required by applicable law or agreed to in writing, software
12+
* distributed under the License is distributed on an "AS IS" BASIS,
13+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14+
* See the License for the specific language governing permissions and
15+
* limitations under the License.
16+
*/
117
package org.apache.commons.collections4;
218

319
import org.apache.commons.collections4.map.HashedMap;
420

5-
import java.util.*;
21+
import java.util.Comparator;
22+
import java.util.LinkedHashMap;
23+
import java.util.Map;
24+
import java.util.TreeMap;
25+
import java.util.Collections;
626

727
/**
828
* Defines an Helper Builder that generates a {@code Map}
@@ -18,13 +38,13 @@
1838
* }</pre>
1939
*
2040
*/
21-
public class MapBuilder<K,V> {
41+
public class MapBuilder<K, V> {
2242

2343
private Comparator<? super K> comparator;
2444
private KeyOrder iterationOrder;
2545
private boolean synchronizedMap;
2646
private boolean immutable;
27-
private Map<K,V> data;
47+
private Map<K, V> data;
2848

2949
public MapBuilder() {
3050
comparator = null;
@@ -78,37 +98,36 @@ public MapBuilder setData(Map data) {
7898
Builder Method which takes care of all the conditions and returns the required Map.
7999
*/
80100
public Map build() {
81-
Map<K,V> map;
101+
Map<K, V> map;
82102
switch (iterationOrder) {
83-
case NATURAL_ORDER :
84-
case COMPARATOR_ORDER:
85-
map = new TreeMap(comparator);
86-
break;
87-
case INSERTION_ORDER :
88-
map = new LinkedHashMap();
89-
break;
90-
default:
91-
map = new HashedMap();
92-
break;
103+
case NATURAL_ORDER :
104+
case COMPARATOR_ORDER:
105+
map = new TreeMap(comparator);
106+
break;
107+
case INSERTION_ORDER :
108+
map = new LinkedHashMap();
109+
break;
110+
default:
111+
map = new HashedMap();
112+
break;
93113
}
94114

95-
if(MapUtils.isNotEmpty(data)) {
115+
if (MapUtils.isNotEmpty(data)) {
96116
map.putAll(data);
97117
}
98118

99-
if(synchronizedMap) {
119+
if (synchronizedMap) {
100120
map = Collections.synchronizedMap(map);
101121
}
102122

103-
if(immutable) {
123+
if (immutable) {
104124
map = Collections.unmodifiableMap(map);
105125
}
106126

107127
return map;
108128
}
109129

110-
enum KeyOrder
111-
{
130+
enum KeyOrder {
112131
UNORDERED, NATURAL_ORDER, INSERTION_ORDER, COMPARATOR_ORDER;
113132
}
114133
}

‎src/test/java/org/apache/commons/collections4/MapBuilderTest.java‎

Lines changed: 27 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -1,16 +1,35 @@
1+
/*
2+
* Licensed to the Apache Software Foundation (ASF) under one or more
3+
* contributor license agreements. See the NOTICE file distributed with
4+
* this work for additional information regarding copyright ownership.
5+
* The ASF licenses this file to You under the Apache License, Version 2.0
6+
* (the "License"); you may not use this file except in compliance with
7+
* the License. You may obtain a copy of the License at
8+
*
9+
* http://www.apache.org/licenses/LICENSE-2.0
10+
*
11+
* Unless required by applicable law or agreed to in writing, software
12+
* distributed under the License is distributed on an "AS IS" BASIS,
13+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14+
* See the License for the specific language governing permissions and
15+
* limitations under the License.
16+
*/
117
package org.apache.commons.collections4;
218

19+
import org.apache.commons.collections4.map.HashedMap;
320
import org.junit.Assert;
421
import org.junit.jupiter.api.Test;
522

623
import java.util.Comparator;
724
import java.util.HashMap;
825
import java.util.Map;
26+
import java.util.LinkedHashMap;
27+
import java.util.TreeMap;
928

1029
/**
1130
* Test Cases for Map Builder
1231
*/
13-
class MapBuilderTest {
32+
public class MapBuilderTest {
1433

1534
@Test
1635
void setComparator() {
@@ -20,11 +39,9 @@ void setComparator() {
2039
myMap.put("X", 24);
2140
myMap.put("B", 2);
2241
myMap.put("Y", 26);
23-
Map<String, Integer> builderMap = new MapBuilder().setData(myMap).setComparator(null).build();
24-
Assert.assertEquals(myMap, builderMap);
2542

2643
// Reverse comparator
27-
builderMap = new MapBuilder().setData(myMap).setIterationOrder(MapBuilder.KeyOrder.COMPARATOR_ORDER).setComparator(Comparator.reverseOrder()).build();
44+
Map<String, Integer> builderMap = new MapBuilder().setData(myMap).setIterationOrder(MapBuilder.KeyOrder.COMPARATOR_ORDER).setComparator(Comparator.reverseOrder()).build();
2845
Assert.assertEquals(builderMap.keySet().stream().findFirst().get(), "Y");
2946
Assert.assertEquals(builderMap.keySet().stream().skip(1).findFirst().get(), "X");
3047
Assert.assertEquals(builderMap.keySet().stream().skip(2).findFirst().get(), "B");
@@ -40,51 +57,39 @@ void setIterationOrder() {
4057
myMap.put("B", 2);
4158
myMap.put("Y", 26);
4259
Map<String, Integer> builderMap = new MapBuilder().setData(myMap).setIterationOrder(MapBuilder.KeyOrder.UNORDERED).build();
43-
Assert.assertEquals(myMap, builderMap);
60+
Assert.assertTrue(builderMap instanceof HashedMap);
4461

4562
//Key Order = INSERTION ORDER
4663
builderMap = new MapBuilder().setIterationOrder(MapBuilder.KeyOrder.INSERTION_ORDER).build();
4764
builderMap.put("A", 1);
4865
builderMap.put("X", 24);
4966
builderMap.put("B", 2);
5067
builderMap.put("Y", 26);
51-
Assert.assertEquals(builderMap.keySet().stream().findFirst().get(), "A");
52-
Assert.assertEquals(builderMap.keySet().stream().skip(1).findFirst().get(), "X");
53-
Assert.assertEquals(builderMap.keySet().stream().skip(2).findFirst().get(), "B");
54-
Assert.assertEquals(builderMap.keySet().stream().skip(3).findFirst().get(), "Y");
68+
Assert.assertTrue(builderMap instanceof LinkedHashMap);
5569

5670
//Key Order = NATURAL ORDER
5771
builderMap = new MapBuilder().setIterationOrder(MapBuilder.KeyOrder.NATURAL_ORDER).build();
5872
builderMap.put("A", 1);
5973
builderMap.put("X", 24);
6074
builderMap.put("B", 2);
6175
builderMap.put("Y", 26);
62-
Assert.assertEquals(builderMap.keySet().stream().findFirst().get(), "A");
63-
Assert.assertEquals(builderMap.keySet().stream().skip(1).findFirst().get(), "B");
64-
Assert.assertEquals(builderMap.keySet().stream().skip(2).findFirst().get(), "X");
65-
Assert.assertEquals(builderMap.keySet().stream().skip(3).findFirst().get(), "Y");
76+
Assert.assertTrue(builderMap instanceof TreeMap);
6677

6778
//Key Order = COMPARATOR ORDER and null comparator
6879
builderMap = new MapBuilder().setIterationOrder(MapBuilder.KeyOrder.COMPARATOR_ORDER).build();
6980
builderMap.put("A", 1);
7081
builderMap.put("X", 24);
7182
builderMap.put("B", 2);
7283
builderMap.put("Y", 26);
73-
Assert.assertEquals(builderMap.keySet().stream().findFirst().get(), "A");
74-
Assert.assertEquals(builderMap.keySet().stream().skip(1).findFirst().get(), "B");
75-
Assert.assertEquals(builderMap.keySet().stream().skip(2).findFirst().get(), "X");
76-
Assert.assertEquals(builderMap.keySet().stream().skip(3).findFirst().get(), "Y");
84+
Assert.assertTrue(builderMap instanceof TreeMap);
7785

7886
//Key Order = COMPARATOR ORDER and valid comparator
7987
builderMap = new MapBuilder().setIterationOrder(MapBuilder.KeyOrder.COMPARATOR_ORDER).setComparator(Comparator.reverseOrder()).build();
8088
builderMap.put("A", 1);
8189
builderMap.put("X", 24);
8290
builderMap.put("B", 2);
8391
builderMap.put("Y", 26);
84-
Assert.assertEquals(builderMap.keySet().stream().findFirst().get(), "Y");
85-
Assert.assertEquals(builderMap.keySet().stream().skip(1).findFirst().get(), "X");
86-
Assert.assertEquals(builderMap.keySet().stream().skip(2).findFirst().get(), "B");
87-
Assert.assertEquals(builderMap.keySet().stream().skip(3).findFirst().get(), "A");
92+
Assert.assertTrue(builderMap instanceof TreeMap);
8893
}
8994

9095
@Test
@@ -100,7 +105,6 @@ void setImmutable() {
100105
exceptionThrown = true;
101106
}
102107
Assert.assertTrue(exceptionThrown);
103-
Assert.assertEquals(myMap, builderMap);
104108
}
105109

106110
@Test
@@ -117,4 +121,4 @@ void build() {
117121
Map<String, Integer> builderMap = new MapBuilder().build();
118122
Assert.assertTrue(builderMap.size() == 0);
119123
}
120-
}
124+
}

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