Example usage for org.springframework.expression.spel.support StandardEvaluationContext StandardEvaluationContext

Introduction

In this page you can find the example usage for org.springframework.expression.spel.support StandardEvaluationContext StandardEvaluationContext.

Prototype

public StandardEvaluationContext()

Source Link

Document

Create a StandardEvaluationContext with a null root object.

Usage

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

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

    final StandardEvaluationContext spelCtx = new StandardEvaluationContext();
    if (null != applicationContext) {
        spelCtx.setBeanResolver(new BeanFactoryResolver(applicationContext));
    }/*from w ww .  jav a 2s .  c  o m*/
    if (!(dbo instanceof BasicDBList)) {
        String[] keySet = dbo.keySet().toArray(new String[] {});
        for (String key : keySet) {
            spelCtx.setVariable(key, dbo.get(key));
        }
    }

    final List<String> ctorParamNames = new ArrayList<String>();
    final MongoPersistentProperty idProperty = entity.getIdProperty();
    final S instance = constructInstance(entity, new PreferredConstructor.ParameterValueProvider() {
        @SuppressWarnings("unchecked")
        public <T> T getParameterValue(PreferredConstructor.Parameter<T> parameter) {
            String name = parameter.getName();
            TypeInformation<T> type = parameter.getType();
            Class<T> rawType = parameter.getRawType();
            String key = idProperty == null ? name
                    : idProperty.getName().equals(name) ? idProperty.getKey() : name;
            Object obj = dbo.get(key);

            ctorParamNames.add(name);
            if (obj instanceof DBRef) {
                return read(type, ((DBRef) obj).fetch());
            } else if (obj instanceof BasicDBList) {
                BasicDBList objAsDbList = (BasicDBList) obj;
                List<?> l = unwrapList(objAsDbList, type);
                return conversionService.convert(l, rawType);
            } else if (obj instanceof DBObject) {
                return read(type, ((DBObject) obj));
            } else if (null != obj && obj.getClass().isAssignableFrom(rawType)) {
                return (T) obj;
            } else if (null != obj) {
                return conversionService.convert(obj, rawType);
            }

            return null;
        }
    }, spelCtx);

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

            boolean isConstructorProperty = ctorParamNames.contains(prop.getName());
            boolean hasValueForProperty = dbo.containsField(prop.getKey());

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

            Object obj = getValueInternal(prop, dbo, spelCtx, prop.getSpelExpression());
            try {
                setProperty(instance, prop, obj, useFieldAccessOnly);
            } catch (IllegalAccessException e) {
                throw new MappingException(e.getMessage(), e);
            } catch (InvocationTargetException e) {
                throw new MappingException(e.getMessage(), e);
            }
        }
    });

    // 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 {
                setProperty(instance, inverseProp, obj);
            } catch (IllegalAccessException e) {
                throw new MappingException(e.getMessage(), e);
            } catch (InvocationTargetException e) {
                throw new MappingException(e.getMessage(), e);
            }
        }
    });

    return instance;
}

From source file:org.springframework.data.gemfire.config.annotation.support.AbstractAnnotationConfigSupport.java

/**
 * Constructs, configures and initializes a new instance of an {@link EvaluationContext}.
 *
 * @param beanFactory reference to the Spring {@link BeanFactory}.
 * @return a new {@link EvaluationContext}.
 * @see org.springframework.beans.factory.BeanFactory
 * @see org.springframework.expression.EvaluationContext
 * @see #getBeanFactory()/*  w w  w .  jav  a 2s  .c  om*/
 */
protected EvaluationContext newEvaluationContext(BeanFactory beanFactory) {

    StandardEvaluationContext evaluationContext = new StandardEvaluationContext();

    evaluationContext.addPropertyAccessor(new BeanFactoryAccessor());
    evaluationContext.addPropertyAccessor(new EnvironmentAccessor());
    evaluationContext.addPropertyAccessor(new MapAccessor());
    evaluationContext.setTypeLocator(new StandardTypeLocator(getBeanClassLoader()));

    configureTypeConverter(evaluationContext, beanFactory);

    return evaluationContext;
}

From source file:org.springframework.integration.expression.ExpressionUtils.java

/**
 * Create a {@link StandardEvaluationContext} with a {@link MapAccessor} in its
 * property accessor property and the supplied {@link ConversionService} in its
 * conversionService property./* w  w w.  ja v a  2 s .c o  m*/
 * @param conversionService the conversion service.
 * @return the evaluation context.
 */
private static StandardEvaluationContext createStandardEvaluationContext(ConversionService conversionService,
        BeanFactory beanFactory) {
    StandardEvaluationContext evaluationContext = new StandardEvaluationContext();
    evaluationContext.addPropertyAccessor(new MapAccessor());
    if (conversionService != null) {
        evaluationContext.setTypeConverter(new StandardTypeConverter(conversionService));
    }
    if (beanFactory != null) {
        evaluationContext.setBeanResolver(new BeanFactoryResolver(beanFactory));
    }
    return evaluationContext;
}