Example usage for org.springframework.data.mongodb.core.mapping MongoPersistentProperty getComponentType

Introduction

In this page you can find the example usage for org.springframework.data.mongodb.core.mapping MongoPersistentProperty getComponentType.

Prototype

@Nullable
Class<?> getComponentType();

Source Link

Document

Returns the component type of the type if it is a java.util.Collection .

Usage

From source file:org.springframework.data.mongodb.core.convert.MappingMongoConverter.java

@SuppressWarnings("unchecked")
protected Object getValueInternal(MongoPersistentProperty prop, DBObject dbo, StandardEvaluationContext ctx,
        String spelExpr) {/*from   w  ww .  j  av  a2  s  .c o m*/

    Object o;
    if (null != spelExpr) {
        Expression x = spelExpressionParser.parseExpression(spelExpr);
        o = x.getValue(ctx);
    } else {

        Object sourceValue = dbo.get(prop.getFieldName());

        if (sourceValue == null) {
            return null;
        }

        Class<?> propertyType = prop.getType();

        if (conversions.hasCustomReadTarget(sourceValue.getClass(), propertyType)) {
            return conversionService.convert(sourceValue, propertyType);
        }

        if (sourceValue instanceof DBRef) {
            sourceValue = ((DBRef) sourceValue).fetch();
        }
        if (sourceValue instanceof DBObject) {
            if (prop.isMap()) {
                return readMap(prop.getTypeInformation(), (DBObject) sourceValue);
            } else if (prop.isArray() && sourceValue instanceof BasicDBObject
                    && ((DBObject) sourceValue).keySet().size() == 0) {
                // It's empty
                return Array.newInstance(prop.getComponentType(), 0);
            } else if (prop.isCollectionLike() && sourceValue instanceof BasicDBList) {
                return readCollectionOrArray(
                        (TypeInformation<? extends Collection<?>>) prop.getTypeInformation(),
                        (BasicDBList) sourceValue);
            }

            TypeInformation<?> toType = typeMapper.readType((DBObject) sourceValue, prop.getTypeInformation());

            // It's a complex object, have to read it in
            if (toType != null) {
                // TODO: why do we remove the type?
                // dbo.removeField(CUSTOM_TYPE_KEY);
                o = read(toType, (DBObject) sourceValue);
            } else {
                o = read(mappingContext.getPersistentEntity(prop.getTypeInformation()), (DBObject) sourceValue);
            }
        } else {
            o = sourceValue;
        }
    }
    return o;
}

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