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Backwards-compatible handling of generic and raw collection converters

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Issue: SPR-11369
This commit is contained in:
Juergen Hoeller
2014-02-01 19:24:40 +01:00
parent e6f4796779
commit 874a2a9ca2
3 changed files with 88 additions and 25 deletions
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82
spring-core/src/test/java/org/springframework/core/convert/support/GenericConversionServiceTests.java
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@@ -619,7 +619,7 @@ public class GenericConversionServiceTests {
GenericConversionService conversionService = new DefaultConversionService();
byte[] byteArray = new byte[] { 1, 2, 3 };
Byte[] converted = conversionService.convert(byteArray, Byte[].class);
assertTrue(Arrays.equals(converted, new Byte[] { 1, 2, 3 }));
assertTrue(Arrays.equals(converted, new Byte[] {1, 2, 3}));
}
@Test
@@ -739,7 +739,7 @@ public class GenericConversionServiceTests {
byte[] byteArray = new byte[] { 1, 2, 3 };
byte[] converted = conversionService.convert(byteArray, byte[].class);
assertNotSame(byteArray, converted);
assertTrue(Arrays.equals(new byte[] { 2, 3, 4 }, converted));
assertTrue(Arrays.equals(new byte[] {2, 3, 4}, converted));
}
@Test
@@ -769,8 +769,11 @@ public class GenericConversionServiceTests {
@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),
@@ -788,6 +791,7 @@ public class GenericConversionServiceTests {
@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"),
@@ -800,6 +804,46 @@ public class GenericConversionServiceTests {
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"))));
}
@@ -810,6 +854,7 @@ public class GenericConversionServiceTests {
public static @interface ExampleAnnotation {
}
private static class MyConditionalConverter implements Converter<String, Color>, ConditionalConverter {
private int matchAttempts = 0;
@@ -830,8 +875,8 @@ public class GenericConversionServiceTests {
}
}
private static class MyConditionalGenericConverter implements GenericConverter,
ConditionalConverter {
private static class MyConditionalGenericConverter implements GenericConverter, ConditionalConverter {
private List<TypeDescriptor> sourceTypes = new ArrayList<TypeDescriptor>();
@@ -857,8 +902,8 @@ public class GenericConversionServiceTests {
}
}
private static class MyConditionalConverterFactory implements
ConverterFactory<String, Color>, ConditionalConverter {
private static class MyConditionalConverterFactory implements ConverterFactory<String, Color>, ConditionalConverter {
private MyConditionalConverter converter = new MyConditionalConverter();
@@ -885,6 +930,7 @@ public class GenericConversionServiceTests {
}
}
interface MyEnumInterface {
String getCode();
@@ -900,6 +946,23 @@ public class GenericConversionServiceTests {
}
}
public static class MyStringToRawCollectionConverter implements Converter<String, Collection> {
@Override
public Collection convert(String source) {
return Collections.singleton(source + "X");
}
}
public 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
@@ -924,12 +987,13 @@ public class GenericConversionServiceTests {
}
}
public Collection<String> stringCollection;
public Collection<Integer> integerCollection;
public Collection rawCollection;
public Collection<?> genericCollection;
public Collection<String> stringCollection;
public Collection<Integer> integerCollection;
}