import org.springframework.data.mapping.model.PersistentEntityParameterValueProvider; //导入依赖的package包/类
private ParameterValueProvider<VaultPersistentProperty> getParameterProvider(
		VaultPersistentEntity<?> entity, SecretDocument source) {

	VaultPropertyValueProvider provider = new VaultPropertyValueProvider(source);

	PersistentEntityParameterValueProvider<VaultPersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<>(
			entity, provider, source);

	return new ParameterValueProvider<VaultPersistentProperty>() {

		@Nullable
		@Override
		public <T> T getParameterValue(Parameter<T, VaultPersistentProperty> parameter) {

			Object value = parameterProvider.getParameterValue(parameter);
			return value != null ? readValue(value, parameter.getType()) : null;
		}
	};
}
 

import org.springframework.data.mapping.model.PersistentEntityParameterValueProvider; //导入依赖的package包/类
private ParameterValueProvider<SolrPersistentProperty> getParameterValueProvider(SolrPersistentEntity<?> entity,
		Map<String, ?> source, Object parent) {

	SolrPropertyValueProvider provider = new SolrPropertyValueProvider(source, parent);
	PersistentEntityParameterValueProvider<SolrPersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<SolrPersistentProperty>(
			entity, provider, parent);

	return parameterProvider;
}
 

import org.springframework.data.mapping.model.PersistentEntityParameterValueProvider; //导入依赖的package包/类
/**
   * Creates a new parameter provider.
   *
   * @param entity the persistent entity.
   * @param source the source document.
   * @param evaluator the SPEL expression evaluator.
   * @param parent the optional parent.
   * @return a new parameter value provider.
   */
private ParameterValueProvider<CratePersistentProperty> getParameterProvider(final CratePersistentEntity<?> entity, final CrateDocument source, 
																			 final DefaultSpELExpressionEvaluator evaluator, final Object parent) {
	
    CratePropertyValueProvider provider = new CratePropertyValueProvider(source, evaluator, parent);
    
    PersistentEntityParameterValueProvider<CratePersistentProperty> parameterProvider = new PersistentEntityParameterValueProvider<>(entity, provider, parent);

    return new ConverterAwareSpELExpressionParameterValueProvider(evaluator, conversionService, parameterProvider, parent);
}