Example usage for org.springframework.core.convert TypeDescriptor isCollection

Introduction

In this page you can find the example usage for org.springframework.core.convert TypeDescriptor isCollection.

Prototype

public boolean isCollection() 

Source Link

Document

Is this type a Collection type?

Usage

From source file:ch.rasc.wampspring.method.MethodParameterConverter.java

@SuppressWarnings("unchecked")
private Object convertListElements(TypeDescriptor td, Object convertedValue) {
    if (List.class.isAssignableFrom(convertedValue.getClass()) && td.isCollection()
            && td.getElementTypeDescriptor() != null) {
        Class<?> elementType = td.getElementTypeDescriptor().getType();

        Collection<Object> convertedList = new ArrayList<>();
        for (Object record : (List<Object>) convertedValue) {
            Object convertedObject = this.objectMapper.convertValue(record, elementType);
            convertedList.add(convertedObject);
        }//from w ww. j a  v a  2s.c  o  m
        return convertedList;

    }
    return convertedValue;
}

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From source file:cz.jirutka.validator.spring.support.RelaxedBooleanTypeConverterDecorator.java

public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
    return targetType.isAssignableTo(BOOLEAN_TYPE)
            && (sourceType.isAssignableTo(NUMBER_TYPE) || sourceType.isCollection() || sourceType.isArray())
            || decorated.canConvert(sourceType, targetType);
}

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From source file:cz.jirutka.validator.spring.support.RelaxedBooleanTypeConverterDecorator.java

public Object convertValue(Object value, TypeDescriptor sourceType, TypeDescriptor targetType) {
    if (targetType.isAssignableTo(BOOLEAN_TYPE)) {
        if (value instanceof Number) {
            return ((Number) value).intValue() != 0;
        }//from w ww.j  av a2 s.  c om
        if (sourceType.isCollection()) {
            return !((Collection) value).isEmpty();
        }
        if (sourceType.isArray()) {
            return ((Object[]) value).length != 0;
        }
        return value;

    } else {
        return decorated.convertValue(value, sourceType, targetType);
    }
}

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From source file:ch.rasc.wampspring.method.MethodParameterConverter.java

public Object convert(MethodParameter parameter, Object argument) {
    if (argument == null) {
        if (parameter.getParameterType().getName().equals("java.util.Optional")) {
            return OptionalUnwrapper.empty();
        }//w w  w  .j ava  2  s  .com

        return null;
    }

    Class<?> sourceClass = argument.getClass();
    Class<?> targetClass = parameter.getParameterType();

    TypeDescriptor td = new TypeDescriptor(parameter);

    if (targetClass.isAssignableFrom(sourceClass)) {
        return convertListElements(td, argument);
    }

    if (this.conversionService.canConvert(sourceClass, targetClass)) {
        try {
            return convertListElements(td, this.conversionService.convert(argument, targetClass));
        } catch (Exception e) {

            TypeFactory typeFactory = this.objectMapper.getTypeFactory();
            if (td.isCollection()) {
                JavaType type = CollectionType.construct(td.getType(),
                        typeFactory.constructType(td.getElementTypeDescriptor().getType()));
                return this.objectMapper.convertValue(argument, type);
            } else if (td.isArray()) {
                JavaType type = typeFactory.constructArrayType(td.getElementTypeDescriptor().getType());
                return this.objectMapper.convertValue(argument, type);
            }

            throw e;
        }
    }
    return this.objectMapper.convertValue(argument, targetClass);
}

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