/*
* Copyright 2002-2018 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.awt.Color;
import java.awt.SystemColor;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
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.core.convert.converter.ConditionalConverter;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.core.io.DescriptiveResource;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
import org.springframework.tests.Assume;
import org.springframework.tests.TestGroup;
import org.springframework.util.StopWatch;
import org.springframework.util.StringUtils;
import static java.util.Comparator.*;
import static java.util.stream.Collectors.*;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
/**
* Unit tests for {@link GenericConversionService}.
*
* <p>In this package for access to package-local converter implementations.
*
* @author Keith Donald
* @author Juergen Hoeller
* @author Phillip Webb
* @author David Haraburda
* @author Sam Brannen
*/
public class GenericConversionServiceTests {
private final GenericConversionService conversionService = new GenericConversionService();
@Test
public void canConvert() {
assertFalse(conversionService.canConvert(String.class, Integer.class));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(String.class, Integer.class));
}
@Test
public void canConvertAssignable() {
assertTrue(conversionService.canConvert(String.class, String.class));
assertTrue(conversionService.canConvert(Integer.class, Number.class));
assertTrue(conversionService.canConvert(boolean.class, boolean.class));
assertTrue(conversionService.canConvert(boolean.class, Boolean.class));
}
@Test(expected = IllegalArgumentException.class)
public void canConvertFromClassSourceTypeToNullTargetType() {
conversionService.canConvert(String.class, null);
}
@Test(expected = IllegalArgumentException.class)
public void canConvertFromTypeDescriptorSourceTypeToNullTargetType() {
conversionService.canConvert(TypeDescriptor.valueOf(String.class), null);
}
@Test
public void canConvertNullSourceType() {
assertTrue(conversionService.canConvert(null, Integer.class));
assertTrue(conversionService.canConvert(null, TypeDescriptor.valueOf(Integer.class)));
}
@Test
public void convert() {
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertEquals(Integer.valueOf(3), conversionService.convert("3", Integer.class));
}
@Test
public void convertNullSource() {
assertEquals(null, conversionService.convert(null, Integer.class));
}
@Test(expected = ConversionFailedException.class)
public void convertNullSourcePrimitiveTarget() {
conversionService.convert(null, int.class);
}
@Test(expected = ConversionFailedException.class)
public void convertNullSourcePrimitiveTargetTypeDescriptor() {
conversionService.convert(null, TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(int.class));
}
@Test(expected = IllegalArgumentException.class)
public void convertNotNullSourceNullSourceTypeDescriptor() {
conversionService.convert("3", null, TypeDescriptor.valueOf(int.class));
}
@Test
public void convertAssignableSource() {
assertEquals(Boolean.FALSE, conversionService.convert(false, boolean.class));
assertEquals(Boolean.FALSE, conversionService.convert(false, Boolean.class));
}
@Test(expected = ConverterNotFoundException.class)
public void converterNotFound() {
conversionService.convert("3", Integer.class);
}
@Test(expected = IllegalArgumentException.class)
public void addConverterNoSourceTargetClassInfoAvailable() {
conversionService.addConverter(new UntypedConverter());
}
@Test
public void sourceTypeIsVoid() {
assertFalse(conversionService.canConvert(void.class, String.class));
}
@Test
public void targetTypeIsVoid() {
assertFalse(conversionService.canConvert(String.class, void.class));
}
@Test
public void convertNull() {
assertNull(conversionService.convert(null, Integer.class));
}
@Test(expected = IllegalArgumentException.class)
public void convertToNullTargetClass() {
conversionService.convert("3", (Class<?>) null);
}
@Test(expected = IllegalArgumentException.class)
public void convertToNullTargetTypeDescriptor() {
conversionService.convert("3", TypeDescriptor.valueOf(String.class), null);
}
@Test(expected = IllegalArgumentException.class)
public void convertWrongSourceTypeDescriptor() {
conversionService.convert("3", TypeDescriptor.valueOf(Integer.class), TypeDescriptor.valueOf(Long.class));
}
@Test(expected = ConversionFailedException.class)
public void convertWrongTypeArgument() {
conversionService.addConverterFactory(new StringToNumberConverterFactory());
conversionService.convert("BOGUS", Integer.class);
}
@Test
public void convertSuperSourceType() {
conversionService.addConverter(new Converter<CharSequence, Integer>() {
@Override
public Integer convert(CharSequence source) {
return Integer.valueOf(source.toString());
}
});
Integer result = conversionService.convert("3", Integer.class);
assertEquals(Integer.valueOf(3), result);
}
// SPR-8718
@Test(expected = ConverterNotFoundException.class)
public void convertSuperTarget() {
conversionService.addConverter(new ColorConverter());
conversionService.convert("#000000", SystemColor.class);
}
@Test
public void convertObjectToPrimitive() {
assertFalse(conversionService.canConvert(String.class, boolean.class));
conversionService.addConverter(new StringToBooleanConverter());
assertTrue(conversionService.canConvert(String.class, boolean.class));
Boolean b = conversionService.convert("true", boolean.class);
assertTrue(b);
assertTrue(conversionService.canConvert(TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(boolean.class)));
b = (Boolean) conversionService.convert("true", TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(boolean.class));
assertTrue(b);
}
@Test
public void convertObjectToPrimitiveViaConverterFactory() {
assertFalse(conversionService.canConvert(String.class, int.class));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(String.class, int.class));
Integer three = conversionService.convert("3", int.class);
assertEquals(3, three.intValue());
}
@Test(expected = ConverterNotFoundException.class)
public void genericConverterDelegatingBackToConversionServiceConverterNotFound() {
conversionService.addConverter(new ObjectToArrayConverter(conversionService));
assertFalse(conversionService.canConvert(String.class, Integer[].class));
conversionService.convert("3,4,5", Integer[].class);
}
@Test
public void testListToIterableConversion() {
List<Object> raw = new ArrayList<>();
raw.add("one");
raw.add("two");
Object converted = conversionService.convert(raw, Iterable.class);
assertSame(raw, converted);
}
@Test
public void testListToObjectConversion() {
List<Object> raw = new ArrayList<>();
raw.add("one");
raw.add("two");
Object converted = conversionService.convert(raw, Object.class);
assertSame(raw, converted);
}
@Test
public void testMapToObjectConversion() {
Map<Object, Object> raw = new HashMap<>();
raw.put("key", "value");
Object converted = conversionService.convert(raw, Object.class);
assertSame(raw, converted);
}
@Test
public void testInterfaceToString() {
conversionService.addConverter(new MyBaseInterfaceToStringConverter());
conversionService.addConverter(new ObjectToStringConverter());
Object converted = conversionService.convert(new MyInterfaceImplementer(), String.class);
assertEquals("RESULT", converted);
}
@Test
public void testInterfaceArrayToStringArray() {
conversionService.addConverter(new MyBaseInterfaceToStringConverter());
conversionService.addConverter(new ArrayToArrayConverter(conversionService));
String[] converted = conversionService.convert(new MyInterface[] {new MyInterfaceImplementer()}, String[].class);
assertEquals("RESULT", converted[0]);
}
@Test
public void testObjectArrayToStringArray() {
conversionService.addConverter(new MyBaseInterfaceToStringConverter());
conversionService.addConverter(new ArrayToArrayConverter(conversionService));
String[] converted = conversionService.convert(new MyInterfaceImplementer[] {new MyInterfaceImplementer()}, String[].class);
assertEquals("RESULT", converted[0]);
}
@Test
public void testStringArrayToResourceArray() {
conversionService.addConverter(new MyStringArrayToResourceArrayConverter());
Resource[] converted = conversionService.convert(new String[] { "x1", "z3" }, Resource[].class);
List<String> descriptions = Arrays.stream(converted).map(Resource::getDescription).sorted(naturalOrder()).collect(toList());
assertEquals(Arrays.asList("1", "3"), descriptions);
}
@Test
public void testStringArrayToIntegerArray() {
conversionService.addConverter(new MyStringArrayToIntegerArrayConverter());
Integer[] converted = conversionService.convert(new String[] {"x1", "z3"}, Integer[].class);
assertArrayEquals(new Integer[] { 1, 3 }, converted);
}
@Test
public void testStringToIntegerArray() {
conversionService.addConverter(new MyStringToIntegerArrayConverter());
Integer[] converted = conversionService.convert("x1,z3", Integer[].class);
assertArrayEquals(new Integer[] { 1, 3 }, converted);
}
@Test
public void testWildcardMap() throws Exception {
Map<String, String> input = new LinkedHashMap<>();
input.put("key", "value");
Object converted = conversionService.convert(input, TypeDescriptor.forObject(input), new TypeDescriptor(getClass().getField("wildcardMap")));
assertEquals(input, converted);
}
@Test
public void testStringToString() {
String value = "myValue";
String result = conversionService.convert(value, String.class);
assertSame(value, result);
}
@Test
public void testStringToObject() {
String value = "myValue";
Object result = conversionService.convert(value, Object.class);
assertSame(value, result);
}
@Test
public void testIgnoreCopyConstructor() {
WithCopyConstructor value = new WithCopyConstructor();
Object result = conversionService.convert(value, WithCopyConstructor.class);
assertSame(value, result);
}
@Test
public void testPerformance2() throws Exception {
Assume.group(TestGroup.PERFORMANCE);
StopWatch watch = new StopWatch("list<string> -> list<integer> conversionPerformance");
watch.start("convert 4,000,000 with conversion service");
List<String> source = new LinkedList<>();
source.add("1");
source.add("2");
source.add("3");
TypeDescriptor td = new TypeDescriptor(getClass().getField("list"));
for (int i = 0; i < 1000000; i++) {
conversionService.convert(source, TypeDescriptor.forObject(source), td);
}
watch.stop();
watch.start("convert 4,000,000 manually");
for (int i = 0; i < 4000000; i++) {
List<Integer> target = new ArrayList<>(source.size());
for (String element : source) {
target.add(Integer.valueOf(element));
}
}
watch.stop();
// System.out.println(watch.prettyPrint());
}
@Test
public void testPerformance3() throws Exception {
Assume.group(TestGroup.PERFORMANCE);
StopWatch watch = new StopWatch("map<string, string> -> map<string, integer> conversionPerformance");
watch.start("convert 4,000,000 with conversion service");
Map<String, String> source = new HashMap<>();
source.put("1", "1");
source.put("2", "2");
source.put("3", "3");
TypeDescriptor td = new TypeDescriptor(getClass().getField("map"));
for (int i = 0; i < 1000000; i++) {
conversionService.convert(source, TypeDescriptor.forObject(source), td);
}
watch.stop();
watch.start("convert 4,000,000 manually");
for (int i = 0; i < 4000000; i++) {
Map<String, Integer> target = new HashMap<>(source.size());
source.forEach((k, v) -> target.put(k, Integer.valueOf(v)));
}
watch.stop();
// System.out.println(watch.prettyPrint());
}
@Test
public void emptyListToArray() {
conversionService.addConverter(new CollectionToArrayConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
List<String> list = new ArrayList<>();
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = TypeDescriptor.valueOf(String[].class);
assertTrue(conversionService.canConvert(sourceType, targetType));
assertEquals(0, ((String[]) conversionService.convert(list, sourceType, targetType)).length);
}
@Test
public void emptyListToObject() {
conversionService.addConverter(new CollectionToObjectConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
List<String> list = new ArrayList<>();
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = TypeDescriptor.valueOf(Integer.class);
assertTrue(conversionService.canConvert(sourceType, targetType));
assertNull(conversionService.convert(list, sourceType, targetType));
}
@Test
public void stringToArrayCanConvert() {
conversionService.addConverter(new StringToArrayConverter(conversionService));
assertFalse(conversionService.canConvert(String.class, Integer[].class));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(String.class, Integer[].class));
}
@Test
public void stringToCollectionCanConvert() throws Exception {
conversionService.addConverter(new StringToCollectionConverter(conversionService));
assertTrue(conversionService.canConvert(String.class, Collection.class));
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("integerCollection"));
assertFalse(conversionService.canConvert(TypeDescriptor.valueOf(String.class), targetType));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(TypeDescriptor.valueOf(String.class), targetType));
}
@Test
public void testConvertiblePairsInSet() {
Set<GenericConverter.ConvertiblePair> set = new HashSet<>();
set.add(new GenericConverter.ConvertiblePair(Number.class, String.class));
assert set.contains(new GenericConverter.ConvertiblePair(Number.class, String.class));
}
@Test
public void testConvertiblePairEqualsAndHash() {
GenericConverter.ConvertiblePair pair = new GenericConverter.ConvertiblePair(Number.class, String.class);
GenericConverter.ConvertiblePair pairEqual = new GenericConverter.ConvertiblePair(Number.class, String.class);
assertEquals(pair, pairEqual);
assertEquals(pair.hashCode(), pairEqual.hashCode());
}
@Test
public void testConvertiblePairDifferentEqualsAndHash() {
GenericConverter.ConvertiblePair pair = new GenericConverter.ConvertiblePair(Number.class, String.class);
GenericConverter.ConvertiblePair pairOpposite = new GenericConverter.ConvertiblePair(String.class, Number.class);
assertFalse(pair.equals(pairOpposite));
assertFalse(pair.hashCode() == pairOpposite.hashCode());
}
@Test(expected = IllegalArgumentException.class)
public void canConvertIllegalArgumentNullTargetTypeFromClass() {
conversionService.canConvert(String.class, null);
}
@Test(expected = IllegalArgumentException.class)
public void canConvertIllegalArgumentNullTargetTypeFromTypeDescriptor() {
conversionService.canConvert(TypeDescriptor.valueOf(String.class), null);
}
@Test
public void removeConvertible() {
conversionService.addConverter(new ColorConverter());
assertTrue(conversionService.canConvert(String.class, Color.class));
conversionService.removeConvertible(String.class, Color.class);
assertFalse(conversionService.canConvert(String.class, Color.class));
}
@Test
public void conditionalConverter() {
MyConditionalConverter converter = new MyConditionalConverter();
conversionService.addConverter(new ColorConverter());
conversionService.addConverter(converter);
assertEquals(Color.BLACK, conversionService.convert("#000000", Color.class));
assertTrue(converter.getMatchAttempts() > 0);
}
@Test
public void conditionalConverterFactory() {
MyConditionalConverterFactory converter = new MyConditionalConverterFactory();
conversionService.addConverter(new ColorConverter());
conversionService.addConverterFactory(converter);
assertEquals(Color.BLACK, conversionService.convert("#000000", Color.class));
assertTrue(converter.getMatchAttempts() > 0);
assertTrue(converter.getNestedMatchAttempts() > 0);
}
@Test
public void conditionalConverterCachingForDifferentAnnotationAttributes() throws Exception {
conversionService.addConverter(new ColorConverter());
conversionService.addConverter(new MyConditionalColorConverter());
assertEquals(Color.BLACK, conversionService.convert("000000xxxx",
new TypeDescriptor(getClass().getField("activeColor"))));
assertEquals(Color.BLACK, conversionService.convert(" #000000 ",
new TypeDescriptor(getClass().getField("inactiveColor"))));
assertEquals(Color.BLACK, conversionService.convert("000000yyyy",
new TypeDescriptor(getClass().getField("activeColor"))));
assertEquals(Color.BLACK, conversionService.convert(" #000000 ",
new TypeDescriptor(getClass().getField("inactiveColor"))));
}
@Test
public void shouldNotSupportNullConvertibleTypesFromNonConditionalGenericConverter() {
GenericConverter converter = new NonConditionalGenericConverter();
try {
conversionService.addConverter(converter);
fail("Did not throw IllegalStateException");
}
catch (IllegalStateException ex) {
assertEquals("Only conditional converters may return null convertible types", ex.getMessage());
}
}
@Test
public void conditionalConversionForAllTypes() {
MyConditionalGenericConverter converter = new MyConditionalGenericConverter();
conversionService.addConverter(converter);
assertEquals((Integer) 3, conversionService.convert(3, Integer.class));
assertThat(converter.getSourceTypes().size(), greaterThan(2));
assertTrue(converter.getSourceTypes().stream().allMatch(td -> Integer.class.equals(td.getType())));
}
@Test
public void convertOptimizeArray() {
// SPR-9566
byte[] byteArray = new byte[] { 1, 2, 3 };
byte[] converted = conversionService.convert(byteArray, byte[].class);
assertSame(byteArray, converted);
}
@Test
public void testEnumToStringConversion() {
conversionService.addConverter(new EnumToStringConverter(conversionService));
assertEquals("A", conversionService.convert(MyEnum.A, String.class));
}
@Test
public void testSubclassOfEnumToString() throws Exception {
conversionService.addConverter(new EnumToStringConverter(conversionService));
assertEquals("FIRST", conversionService.convert(EnumWithSubclass.FIRST, String.class));
}
@Test
public void testEnumWithInterfaceToStringConversion() {
// SPR-9692
conversionService.addConverter(new EnumToStringConverter(conversionService));
conversionService.addConverter(new MyEnumInterfaceToStringConverter<MyEnum>());
assertEquals("1", conversionService.convert(MyEnum.A, String.class));
}
@Test
public void testStringToEnumWithInterfaceConversion() {
conversionService.addConverterFactory(new StringToEnumConverterFactory());
conversionService.addConverterFactory(new StringToMyEnumInterfaceConverterFactory());
assertEquals(MyEnum.A, conversionService.convert("1", MyEnum.class));
}
@Test
public void testStringToEnumWithBaseInterfaceConversion() {
conversionService.addConverterFactory(new StringToEnumConverterFactory());
conversionService.addConverterFactory(new StringToMyEnumBaseInterfaceConverterFactory());
assertEquals(MyEnum.A, conversionService.convert("base1", MyEnum.class));
}
@Test
public void convertNullAnnotatedStringToString() throws Exception {
String source = null;
TypeDescriptor sourceType = new TypeDescriptor(getClass().getField("annotatedString"));
TypeDescriptor targetType = TypeDescriptor.valueOf(String.class);
conversionService.convert(source, sourceType, targetType);
}
@Test
public void multipleCollectionTypesFromSameSourceType() throws Exception {
conversionService.addConverter(new MyStringToRawCollectionConverter());
conversionService.addConverter(new MyStringToGenericCollectionConverter());
conversionService.addConverter(new MyStringToStringCollectionConverter());
conversionService.addConverter(new MyStringToIntegerCollectionConverter());
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
assertEquals(Collections.singleton(4),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("integerCollection"))));
assertEquals(Collections.singleton(4),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
assertEquals(Collections.singleton(4),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericCollection"))));
assertEquals(Collections.singleton(4),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
}
@Test
public void adaptedCollectionTypesFromSameSourceType() throws Exception {
conversionService.addConverter(new MyStringToStringCollectionConverter());
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
try {
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("integerCollection")));
fail("Should have thrown ConverterNotFoundException");
}
catch (ConverterNotFoundException ex) {
// expected
}
}
@Test
public void genericCollectionAsSource() throws Exception {
conversionService.addConverter(new MyStringToGenericCollectionConverter());
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
// The following is unpleasant but a consequence of the generic collection converter above...
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("integerCollection"))));
}
@Test
public void rawCollectionAsSource() throws Exception {
conversionService.addConverter(new MyStringToRawCollectionConverter());
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("stringCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("genericCollection"))));
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("rawCollection"))));
// The following is unpleasant but a consequence of the raw collection converter above...
assertEquals(Collections.singleton("testX"),
conversionService.convert("test", TypeDescriptor.valueOf(String.class), new TypeDescriptor(getClass().getField("integerCollection"))));
}
@ExampleAnnotation(active = true)
public String annotatedString;
@ExampleAnnotation(active = true)
public Color activeColor;
@ExampleAnnotation(active = false)
public Color inactiveColor;
public List<Integer> list;
public Map<String, Integer> map;
public Map<String, ?> wildcardMap;
@SuppressWarnings("rawtypes")
public Collection rawCollection;
public Collection<?> genericCollection;
public Collection<String> stringCollection;
public Collection<Integer> integerCollection;
@Retention(RetentionPolicy.RUNTIME)
private @interface ExampleAnnotation {
boolean active();
}
private interface MyBaseInterface {
}
private interface MyInterface extends MyBaseInterface {
}
private static class MyInterfaceImplementer implements MyInterface {
}
private static class MyBaseInterfaceToStringConverter implements Converter<MyBaseInterface, String> {
@Override
public String convert(MyBaseInterface source) {
return "RESULT";
}
}
private static class MyStringArrayToResourceArrayConverter implements Converter<String[], Resource[]> {
@Override
public Resource[] convert(String[] source) {
return Arrays.stream(source).map(s -> s.substring(1)).map(DescriptiveResource::new).toArray(Resource[]::new);
}
}
private static class MyStringArrayToIntegerArrayConverter implements Converter<String[], Integer[]> {
@Override
public Integer[] convert(String[] source) {
return Arrays.stream(source).map(s -> s.substring(1)).map(Integer::valueOf).toArray(Integer[]::new);
}
}
private static class MyStringToIntegerArrayConverter implements Converter<String, Integer[]> {
@Override
public Integer[] convert(String source) {
String[] srcArray = StringUtils.commaDelimitedListToStringArray(source);
return Arrays.stream(srcArray).map(s -> s.substring(1)).map(Integer::valueOf).toArray(Integer[]::new);
}
}
private static class WithCopyConstructor {
WithCopyConstructor() {}
@SuppressWarnings("unused")
WithCopyConstructor(WithCopyConstructor value) {}
}
private static class MyConditionalConverter implements Converter<String, Color>, ConditionalConverter {
private int matchAttempts = 0;
@Override
public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
matchAttempts++;
return false;
}
@Override
public Color convert(String source) {
throw new IllegalStateException();
}
public int getMatchAttempts() {
return matchAttempts;
}
}
private static class NonConditionalGenericConverter implements GenericConverter {
@Override
public Set<ConvertiblePair> getConvertibleTypes() {
return null;
}
@Override
@Nullable
public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
return null;
}
}
private static class MyConditionalGenericConverter implements GenericConverter, ConditionalConverter {
private final List<TypeDescriptor> sourceTypes = new ArrayList<>();
@Override
public Set<ConvertiblePair> getConvertibleTypes() {
return null;
}
@Override
public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
sourceTypes.add(sourceType);
return false;
}
@Override
@Nullable
public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
return null;
}
public List<TypeDescriptor> getSourceTypes() {
return sourceTypes;
}
}
private static class MyConditionalConverterFactory implements ConverterFactory<String, Color>, ConditionalConverter {
private MyConditionalConverter converter = new MyConditionalConverter();
private int matchAttempts = 0;
@Override
public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
matchAttempts++;
return true;
}
@Override
@SuppressWarnings("unchecked")
public <T extends Color> Converter<String, T> getConverter(Class<T> targetType) {
return (Converter<String, T>) converter;
}
public int getMatchAttempts() {
return matchAttempts;
}
public int getNestedMatchAttempts() {
return converter.getMatchAttempts();
}
}
private static interface MyEnumBaseInterface {
String getBaseCode();
}
private interface MyEnumInterface extends MyEnumBaseInterface {
String getCode();
}
private enum MyEnum implements MyEnumInterface {
A("1"),
B("2"),
C("3");
private final String code;
MyEnum(String code) {
this.code = code;
}
@Override
public String getCode() {
return code;
}
@Override
public String getBaseCode() {
return "base" + code;
}
}
private enum EnumWithSubclass {
FIRST {
@Override
public String toString() {
return "1st";
}
}
}
@SuppressWarnings("rawtypes")
private static class MyStringToRawCollectionConverter implements Converter<String, Collection> {
@Override
public Collection convert(String source) {
return Collections.singleton(source + "X");
}
}
private static class MyStringToGenericCollectionConverter implements Converter<String, Collection<?>> {
@Override
public Collection<?> convert(String source) {
return Collections.singleton(source + "X");
}
}
private static class MyEnumInterfaceToStringConverter<T extends MyEnumInterface> implements Converter<T, String> {
@Override
public String convert(T source) {
return source.getCode();
}
}
private static class StringToMyEnumInterfaceConverterFactory implements ConverterFactory<String, MyEnumInterface> {
@SuppressWarnings({"unchecked", "rawtypes"})
public <T extends MyEnumInterface> Converter<String, T> getConverter(Class<T> targetType) {
return new StringToMyEnumInterfaceConverter(targetType);
}
private static class StringToMyEnumInterfaceConverter<T extends Enum<?> & MyEnumInterface> implements Converter<String, T> {
private final Class<T> enumType;
public StringToMyEnumInterfaceConverter(Class<T> enumType) {
this.enumType = enumType;
}
public T convert(String source) {
for (T value : enumType.getEnumConstants()) {
if (value.getCode().equals(source)) {
return value;
}
}
return null;
}
}
}
private static class StringToMyEnumBaseInterfaceConverterFactory implements ConverterFactory<String, MyEnumBaseInterface> {
@SuppressWarnings({"unchecked", "rawtypes"})
public <T extends MyEnumBaseInterface> Converter<String, T> getConverter(Class<T> targetType) {
return new StringToMyEnumBaseInterfaceConverter(targetType);
}
private static class StringToMyEnumBaseInterfaceConverter<T extends Enum<?> & MyEnumBaseInterface> implements Converter<String, T> {
private final Class<T> enumType;
public StringToMyEnumBaseInterfaceConverter(Class<T> enumType) {
this.enumType = enumType;
}
public T convert(String source) {
for (T value : enumType.getEnumConstants()) {
if (value.getBaseCode().equals(source)) {
return value;
}
}
return null;
}
}
}
private static class MyStringToStringCollectionConverter implements Converter<String, Collection<String>> {
@Override
public Collection<String> convert(String source) {
return Collections.singleton(source + "X");
}
}
private static class MyStringToIntegerCollectionConverter implements Converter<String, Collection<Integer>> {
@Override
public Collection<Integer> convert(String source) {
return Collections.singleton(source.length());
}
}
@SuppressWarnings("rawtypes")
private static class UntypedConverter implements Converter {
@Override
public Object convert(Object source) {
return source;
}
}
private static class ColorConverter implements Converter<String, Color> {
@Override
public Color convert(String source) {
return Color.decode(source.trim());
}
}
private static class MyConditionalColorConverter implements Converter<String, Color>, ConditionalConverter {
@Override
public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
ExampleAnnotation ann = targetType.getAnnotation(ExampleAnnotation.class);
return (ann != null && ann.active());
}
@Override
public Color convert(String source) {
return Color.decode(source.substring(0, 6));
}
}
}
