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

Introduction

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

Prototype

@Nullable
String getSpelExpression();

Source Link

Usage

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

private <S extends Object> S read(final MongoPersistentEntity<S> entity, final DBObject dbo) {

    final StandardEvaluationContext spelCtx = new StandardEvaluationContext(dbo);
    spelCtx.addPropertyAccessor(DBObjectPropertyAccessor.INSTANCE);

    if (applicationContext != null) {
        spelCtx.setBeanResolver(new BeanFactoryResolver(applicationContext));
    }/*ww w  . j a va  2 s. co  m*/

    final MappedConstructor constructor = new MappedConstructor(entity, mappingContext);

    SpELAwareParameterValueProvider delegate = new SpELAwareParameterValueProvider(spelExpressionParser,
            spelCtx);
    ParameterValueProvider provider = new DelegatingParameterValueProvider(constructor, dbo, delegate);

    final BeanWrapper<MongoPersistentEntity<S>, S> wrapper = BeanWrapper.create(entity, provider,
            conversionService);

    // Set properties not already set in the constructor
    entity.doWithProperties(new PropertyHandler<MongoPersistentProperty>() {
        public void doWithPersistentProperty(MongoPersistentProperty prop) {

            boolean isConstructorProperty = constructor.isConstructorParameter(prop);
            boolean hasValueForProperty = dbo.containsField(prop.getFieldName());

            if (!hasValueForProperty || isConstructorProperty) {
                return;
            }

            Object obj = getValueInternal(prop, dbo, spelCtx, prop.getSpelExpression());
            wrapper.setProperty(prop, obj, useFieldAccessOnly);
        }
    });

    // Handle associations
    entity.doWithAssociations(new AssociationHandler<MongoPersistentProperty>() {
        public void doWithAssociation(Association<MongoPersistentProperty> association) {
            MongoPersistentProperty inverseProp = association.getInverse();
            Object obj = getValueInternal(inverseProp, dbo, spelCtx, inverseProp.getSpelExpression());
            try {
                wrapper.setProperty(inverseProp, obj);
            } catch (IllegalAccessException e) {
                throw new MappingException(e.getMessage(), e);
            } catch (InvocationTargetException e) {
                throw new MappingException(e.getMessage(), e);
            }
        }
    });

    return wrapper.getBean();
}

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