Examples of org.springframework.core.convert.converter.GenericConverter

Package org.springframework.core.convert.converter

Examples of org.springframework.core.convert.converter.GenericConverter

org.springframework.core.convert.converter.GenericConverter
Generic converter interface for converting between two or more types.
This is the most flexible of the Converter SPI interfaces, but also the most complex. It is flexible in that a GenericConverter may support converting between multiple source/target type pairs (see {@link #getConvertibleTypes()}. In addition, GenericConverter implementations have access to source/target {@link TypeDescriptor field context} during the type conversion process.This allows for resolving source and target field metadata such as annotations and generics information, which can be used influence the conversion logic.
This interface should generally not be used when the simpler {@link Converter} or{@link ConverterFactory} interfaces are sufficient.
Implementations may additionally implement {@link ConditionalConverter}. @author Keith Donald @author Juergen Hoeller @since 3.0 @see TypeDescriptor @see Converter @see ConverterFactory @see ConditionalConverter

      for (Iterator<?> it = sourceCollection.iterator(); it.hasNext(); i++) {
        Array.set(array, i, it.next());
      }
    }
    else {
      GenericConverter converter = this.conversionService.getConverter(sourceElementType, targetElementType);
      if (converter == null) {
        throw new ConverterNotFoundException(sourceElementType, targetElementType);
      }
      for (Iterator<?> it = sourceCollection.iterator(); it.hasNext(); i++) {
        Object sourceElement = it.next();

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      for (int i = 0; i < length; i++) {
        collection.add(Array.get(source, i));
      }
    }
    else {
      GenericConverter converter = this.conversionService.getConverter(sourceElementType, targetElementType);
      if (converter == null) {
        throw new ConverterNotFoundException(sourceElementType, targetElementType);
      }
      for (int i = 0; i < length; i++) {
        Object sourceElement = Array.get(source, i);

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      for (String field : fields) {
        target.add(field);
      }
    }
    else {
      GenericConverter converter = this.conversionService.getConverter(sourceType, targetElementType);
      if (converter == null) {
        throw new ConverterNotFoundException(sourceType, targetElementType);
      }
      for (String sourceElement : fields) {
        Object targetElement = ConversionUtils.invokeConverter(

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      }
      if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetType)) {
        return firstElement;
      }
      else {
        GenericConverter converter = this.conversionService.getConverter(sourceElementType, targetType);
        if (converter == null) {
          throw new ConverterNotFoundException(sourceElementType, targetType);
        }
        return ConversionUtils.invokeConverter(converter, firstElement, sourceElementType, targetType);
      }

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      return convertNullSource(sourceType, targetType);
    }
    if (targetType == TypeDescriptor.NULL) {
      return null;
    }
    GenericConverter converter = getConverter(sourceType, targetType);
    if (converter == null) {
      throw new ConverterNotFoundException(sourceType, targetType);
    }
    return ConversionUtils.invokeConverter(converter, source, sourceType, targetType);
  }

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   * @param sourceType the source type to convert from
   * @param targetType the target type to convert to
   * @return the generic converter that will perform the conversion, or <code>null</code> if no suitable converter was found
   */
  protected GenericConverter getConverter(TypeDescriptor sourceType, TypeDescriptor targetType) {
    GenericConverter converter = findConverterForClassPair(sourceType, targetType);
    if (converter != null) {
      return converter;
    }
    else {
      return getDefaultConverter(sourceType, targetType);

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      LinkedList<Class<?>> classQueue = new LinkedList<Class<?>>();
      classQueue.addFirst(sourceObjectType);
      while (!classQueue.isEmpty()) {
        Class<?> currentClass = classQueue.removeLast();
        Map<Class<?>, MatchableConverters> converters = getTargetConvertersForSource(currentClass);
        GenericConverter converter = getMatchingConverterForTarget(sourceType, targetType, converters);
        if (converter != null) {
          return converter;
        }
        Class<?>[] interfaces = currentClass.getInterfaces();
        for (Class<?> ifc : interfaces) {
          classQueue.addFirst(ifc);
        }
      }
      Map<Class<?>, MatchableConverters> objectConverters = getTargetConvertersForSource(Object.class);
      return getMatchingConverterForTarget(sourceType, targetType, objectConverters);
    }
    else {
      LinkedList<Class<?>> classQueue = new LinkedList<Class<?>>();
      classQueue.addFirst(sourceObjectType);
      while (!classQueue.isEmpty()) {
        Class<?> currentClass = classQueue.removeLast();
        Map<Class<?>, MatchableConverters> converters = getTargetConvertersForSource(currentClass);
        GenericConverter converter = getMatchingConverterForTarget(sourceType, targetType, converters);
        if (converter != null) {
          return converter;
        }
        if (currentClass.isArray()) {
          Class<?> componentType = ClassUtils.resolvePrimitiveIfNecessary(currentClass.getComponentType());

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      LinkedList<Class<?>> classQueue = new LinkedList<Class<?>>();
      classQueue.addFirst(targetObjectType);
      while (!classQueue.isEmpty()) {
        Class<?> currentClass = classQueue.removeLast();
        MatchableConverters matchable = converters.get(currentClass);
        GenericConverter converter = matchConverter(matchable, sourceType, targetType);
        if (converter != null) {
          return converter;
        }
        Class<?>[] interfaces = currentClass.getInterfaces();
        for (Class<?> ifc : interfaces) {
          classQueue.addFirst(ifc);
        }
      }
      return matchConverter(converters.get(Object.class), sourceType, targetType);
    }
    else {
      LinkedList<Class<?>> classQueue = new LinkedList<Class<?>>();
      classQueue.addFirst(targetObjectType);
      while (!classQueue.isEmpty()) {
        Class<?> currentClass = classQueue.removeLast();
        MatchableConverters matchable = converters.get(currentClass);
        GenericConverter converter = matchConverter(matchable, sourceType, targetType);
        if (converter != null) {
          return converter;
        }
        if (currentClass.isArray()) {
          Class<?> componentType = ClassUtils.resolvePrimitiveIfNecessary(currentClass.getComponentType());

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      return sourceType.getAnnotation(annotationType) != null;
    }
    
    public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
      AnnotationConverterKey converterKey = new AnnotationConverterKey(sourceType.getAnnotation(annotationType), sourceType.getObjectType());
      GenericConverter converter = cachedPrinters.get(converterKey);
      if (converter == null) {
        Printer<?> printer = annotationFormatterFactory.getPrinter(converterKey.getAnnotation(), converterKey.getFieldType());
        converter = new PrinterConverter(fieldType, printer, FormattingConversionService.this);
        cachedPrinters.put(converterKey, converter);
      }
      return converter.convert(source, sourceType, targetType);
    }

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      return targetType.getAnnotation(annotationType) != null;
    }
    
    public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
      AnnotationConverterKey converterKey = new AnnotationConverterKey(targetType.getAnnotation(annotationType), targetType.getObjectType());
      GenericConverter converter = cachedParsers.get(converterKey);
      if (converter == null) {
        Parser<?> parser = annotationFormatterFactory.getParser(converterKey.getAnnotation(), converterKey.getFieldType());
        converter = new ParserConverter(fieldType, parser, FormattingConversionService.this);
        cachedParsers.put(converterKey, converter);
      }
      return converter.convert(source, sourceType, targetType);
    }

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