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/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.core.convert.support;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.springframework.core.convert.ConversionFailedException;
import org.springframework.core.convert.ConverterNotFoundException;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
public class MapToMapConverterTests {
private GenericConversionService conversionService = new GenericConversionService();
@Before
public void setUp() {
conversionService.addConverter(new MapToMapConverter(conversionService));
}
@Test
public void scalarMap() throws Exception {
Map<String, String> map = new HashMap<String, String>();
map.put("1", "9");
map.put("2", "37");
TypeDescriptor sourceType = TypeDescriptor.forObject(map);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("scalarMapTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
try {
conversionService.convert(map, sourceType, targetType);
} catch (ConversionFailedException e) {
assertTrue(e.getCause() instanceof ConverterNotFoundException);
}
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
Map<Integer, Integer> result = (Map<Integer, Integer>) conversionService.convert(map, sourceType, targetType);
assertFalse(map.equals(result));
assertEquals((Integer) 9, result.get(1));
assertEquals((Integer) 37, result.get(2));
}
@Test
public void scalarMapNotGenericTarget() throws Exception {
Map<String, String> map = new HashMap<String, String>();
map.put("1", "9");
map.put("2", "37");
assertTrue(conversionService.canConvert(Map.class, Map.class));
assertSame(map, conversionService.convert(map, Map.class));
}
@Test
public void scalarMapNotGenericSourceField() throws Exception {
Map<String, String> map = new HashMap<String, String>();
map.put("1", "9");
map.put("2", "37");
TypeDescriptor sourceType = new TypeDescriptor(getClass().getField("notGenericMapSource"));
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("scalarMapTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
try {
conversionService.convert(map, sourceType, targetType);
} catch (ConversionFailedException e) {
assertTrue(e.getCause() instanceof ConverterNotFoundException);
}
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
Map<Integer, Integer> result = (Map<Integer, Integer>) conversionService.convert(map, sourceType, targetType);
assertFalse(map.equals(result));
assertEquals((Integer) 9, result.get(1));
assertEquals((Integer) 37, result.get(2));
}
@Test
public void collectionMap() throws Exception {
Map<String, List<String>> map = new HashMap<String, List<String>>();
map.put("1", Arrays.asList("9", "12"));
map.put("2", Arrays.asList("37", "23"));
TypeDescriptor sourceType = TypeDescriptor.forObject(map);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("collectionMapTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
try {
conversionService.convert(map, sourceType, targetType);
} catch (ConversionFailedException e) {
assertTrue(e.getCause() instanceof ConverterNotFoundException);
}
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
Map<Integer, List<Integer>> result = (Map<Integer, List<Integer>>) conversionService.convert(map, sourceType, targetType);
assertFalse(map.equals(result));
assertEquals(Arrays.asList(9, 12), result.get(1));
assertEquals(Arrays.asList(37, 23), result.get(2));
}
@Test
public void collectionMapSourceTarget() throws Exception {
Map<String, List<String>> map = new HashMap<String, List<String>>();
map.put("1", Arrays.asList("9", "12"));
map.put("2", Arrays.asList("37", "23"));
TypeDescriptor sourceType = new TypeDescriptor(getClass().getField("sourceCollectionMapTarget"));
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("collectionMapTarget"));
assertFalse(conversionService.canConvert(sourceType, targetType));
try {
conversionService.convert(map, sourceType, targetType);
fail("Should have failed");
}
catch (ConverterNotFoundException ex) {
// expected
}
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
Map<Integer, List<Integer>> result = (Map<Integer, List<Integer>>) conversionService.convert(map, sourceType, targetType);
assertFalse(map.equals(result));
assertEquals(Arrays.asList(9, 12), result.get(1));
assertEquals(Arrays.asList(37, 23), result.get(2));
}
@Test
public void collectionMapNotGenericTarget() throws Exception {
Map<String, List<String>> map = new HashMap<String, List<String>>();
map.put("1", Arrays.asList("9", "12"));
map.put("2", Arrays.asList("37", "23"));
assertTrue(conversionService.canConvert(Map.class, Map.class));
assertSame(map, conversionService.convert(map, Map.class));
}
@Test
public void collectionMapNotGenericTargetCollectionToObjectInteraction() throws Exception {
Map<String, List<String>> map = new HashMap<String, List<String>>();
map.put("1", Arrays.asList("9", "12"));
map.put("2", Arrays.asList("37", "23"));
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
conversionService.addConverter(new CollectionToObjectConverter(conversionService));
assertTrue(conversionService.canConvert(Map.class, Map.class));
assertSame(map, conversionService.convert(map, Map.class));
}
@Test
public void emptyMap() throws Exception {
Map<String, String> map = new HashMap<String, String>();
TypeDescriptor sourceType = TypeDescriptor.forObject(map);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("emptyMapTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
assertSame(map, conversionService.convert(map, sourceType, targetType));
}
@Test
public void emptyMapNoTargetGenericInfo() throws Exception {
Map<String, String> map = new HashMap<String, String>();
assertTrue(conversionService.canConvert(Map.class, Map.class));
assertSame(map, conversionService.convert(map, Map.class));
}
@Test
public void emptyMapDifferentTargetImplType() throws Exception {
Map<String, String> map = new HashMap<String, String>();
TypeDescriptor sourceType = TypeDescriptor.forObject(map);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("emptyMapDifferentTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
LinkedHashMap<String, String> result = (LinkedHashMap<String, String>) conversionService.convert(map, sourceType, targetType);
assertEquals(map, result);
assertEquals(LinkedHashMap.class, result.getClass());
}
@Test
public void noDefaultConstructorCopyNotRequired() throws Exception {
// SPR-9284
NoDefaultConstructorMap<String, Integer> map = new NoDefaultConstructorMap<String,Integer>(
Collections.<String, Integer> singletonMap("1", 1));
TypeDescriptor sourceType = TypeDescriptor.map(NoDefaultConstructorMap.class,
TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(Integer.class));
TypeDescriptor targetType = TypeDescriptor.map(NoDefaultConstructorMap.class,
TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(Integer.class));
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
Map<String, Integer> result = (Map<String, Integer>) conversionService.convert(map, sourceType, targetType);
assertEquals(map, result);
assertEquals(NoDefaultConstructorMap.class, result.getClass());
}
@Test
@SuppressWarnings("unchecked")
public void multiValueMapToMultiValueMap() throws Exception {
DefaultConversionService.addDefaultConverters(conversionService);
MultiValueMap<String, Integer> source = new LinkedMultiValueMap<String, Integer>();
source.put("a", Arrays.asList(1, 2, 3));
source.put("b", Arrays.asList(4, 5, 6));
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("multiValueMapTarget"));
MultiValueMap<String, String> converted = (MultiValueMap<String, String>) conversionService.convert(source, targetType);
assertThat(converted.size(), equalTo(2));
assertThat(converted.get("a"), equalTo(Arrays.asList("1", "2", "3")));
assertThat(converted.get("b"), equalTo(Arrays.asList("4", "5", "6")));
}
@Test
@SuppressWarnings("unchecked")
public void mapToMultiValueMap() throws Exception {
DefaultConversionService.addDefaultConverters(conversionService);
Map<String, Integer> source = new HashMap<String, Integer>();
source.put("a", 1);
source.put("b", 2);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("multiValueMapTarget"));
MultiValueMap<String, String> converted = (MultiValueMap<String, String>) conversionService.convert(source, targetType);
assertThat(converted.size(), equalTo(2));
assertThat(converted.get("a"), equalTo(Arrays.asList("1")));
assertThat(converted.get("b"), equalTo(Arrays.asList("2")));
}
@Test
public void testStringToEnumMap() throws Exception {
conversionService.addConverterFactory(new StringToEnumConverterFactory());
Map<String, Integer> source = new HashMap<String, Integer>();
source.put("A", 1);
source.put("C", 2);
EnumMap<MyEnum, Integer> result = new EnumMap<MyEnum, Integer>(MyEnum.class);
result.put(MyEnum.A, 1);
result.put(MyEnum.C, 2);
assertEquals(result,
conversionService.convert(source, TypeDescriptor.forObject(source), new TypeDescriptor(getClass().getField("enumMap"))));
}
@SuppressWarnings("serial")
public static class NoDefaultConstructorMap<K, V> extends HashMap<K, V> {
public NoDefaultConstructorMap(Map<? extends K, ? extends V> map) {
super(map);
}
}
public static enum MyEnum {A, B, C}
public Map<Integer, Integer> scalarMapTarget;
public Map<Integer, List<Integer>> collectionMapTarget;
public Map<String, List<String>> sourceCollectionMapTarget;
public Map<String, String> emptyMapTarget;
public LinkedHashMap<String, String> emptyMapDifferentTarget;
public MultiValueMap<String, String> multiValueMapTarget;
@SuppressWarnings("rawtypes")
public Map notGenericMapSource;
public EnumMap<MyEnum, Integer> enumMap;
}
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