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collection to object

This commit is contained in:
Keith Donald 2009-09-21 05:30:54 +00:00
parent 67c02f6c35
commit cb54869726
2 changed files with 30 additions and 5 deletions
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15
org.springframework.core/src/main/java/org/springframework/core/convert/support/ArrayToObjectGenericConverter.java
View File

@ -15,6 +15,8 @@
*/ */
package org.springframework.core.convert.support; package org.springframework.core.convert.support;
import java.lang.reflect.Array;
import org.springframework.core.convert.TypeDescriptor; import org.springframework.core.convert.TypeDescriptor;
class ArrayToObjectGenericConverter implements GenericConverter { class ArrayToObjectGenericConverter implements GenericConverter {
@ -26,7 +28,18 @@ class ArrayToObjectGenericConverter implements GenericConverter {
} }
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) { public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
throw new UnsupportedOperationException("Not yet implemented"); int length = Array.getLength(source);
if (length == 0) {
return null;
} else {
TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
if (sourceElementType.isAssignableTo(targetType)) {
return Array.get(source, 0);
} else {
GenericConverter converter = conversionService.getConverter(sourceElementType, targetType);
return converter.convert(Array.get(source, 0), sourceElementType, targetType);
}
}
} }
} }

20
org.springframework.core/src/main/java/org/springframework/core/convert/support/CollectionToObjectGenericConverter.java
View File

@ -15,6 +15,8 @@
*/ */
package org.springframework.core.convert.support; package org.springframework.core.convert.support;
import java.util.Collection;
import org.springframework.core.convert.TypeDescriptor; import org.springframework.core.convert.TypeDescriptor;
class CollectionToObjectGenericConverter implements GenericConverter { class CollectionToObjectGenericConverter implements GenericConverter {
@ -24,9 +26,19 @@ class CollectionToObjectGenericConverter implements GenericConverter {
public CollectionToObjectGenericConverter(GenericConversionService conversionService) { public CollectionToObjectGenericConverter(GenericConversionService conversionService) {
this.conversionService = conversionService; this.conversionService = conversionService;
} }
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
throw new UnsupportedOperationException("Not yet implemented");
}
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
Collection sourceCollection = (Collection) source;
if (sourceCollection.size() == 0) {
return null;
} else {
TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetType)) {
return sourceCollection.iterator().next();
} else {
GenericConverter converter = conversionService.getConverter(sourceElementType, targetType);
return converter.convert(sourceCollection.iterator().next(), sourceElementType, targetType);
}
}
}
} }