/*******************************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 ******************************************************************************/
package org.apache.olingo.odata2.jpa.processor.api.model;

import java.util.List;

import javax.persistence.metamodel.Attribute;

import org.apache.olingo.odata2.api.edm.provider.Property;
import org.apache.olingo.odata2.api.edm.provider.SimpleProperty;

/**
 * A view on Java Persistence Entity Attributes and EDM properties. Java
 * Persistence Attributes of type
 * <ol>
 * <li>embedded ID - are converted into EDM keys</li>
 * <li>ID - are converted into EDM keys</li>
 * <li>attributes - are converted into EDM properties</li>
 * <li>embeddable type - are converted into EDM complex properties</li>
 * <li>relationships - are converted into Associations/Navigation properties</li>
 * </ol>
 * <p>
 * The implementation of the view provides access to EDM properties for a given
 * JPA EDM entity type. The view acts as a container for consistent list of EDM
 * properties of an EDM entity type. EDM property is consistent only if there
 * exists at least one property in the entity type and there is at least one key
 * property.
 * 
 * 
 * <p>
 * @org.apache.olingo.odata2.DoNotImplement
 * @see org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmKeyView
 * @see org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmNavigationPropertyView
 * 
 */
public interface JPAEdmPropertyView extends JPAEdmBaseView {
  /**
   * The method returns a simple EDM property.
   * 
   * @return an instance of type {@link org.apache.olingo.odata2.api.edm.provider.SimpleProperty}
   */
  SimpleProperty getEdmSimpleProperty();

  /**
   * The method returns a JPA EDM key view.
   * 
   * @return an instance of type {@link org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmKeyView}
   */
  JPAEdmKeyView getJPAEdmKeyView();

  /**
   * The method returns a list of Properties for the given Entity Type.
   * 
   * @return a list of {@link org.apache.olingo.odata2.api.edm.provider.Property}
   */
  List<Property> getEdmPropertyList();

  /**
   * The method returns a JPA Attribute for the given JPA entity type.
   * 
   * @return an instance of type {@link javax.persistence.metamodel.Attribute
   * <?, ?>}
   */
  Attribute<?, ?> getJPAAttribute();

  /**
   * The method returns a JPA Attribute referenced by a JPA Attribute in the {@link javax.persistence.JoinColumn}
   * annotation for the given JPA entity type .
   * 
   * @return an instance of type {@link javax.persistence.metamodel.Attribute
   * <?, ?>}
   */
  Attribute<?, ?> getJPAReferencedAttribute();

  /**
   * The method returns a JPA EDM navigation property view.
   * 
   * @return an instance of type {@link org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmNavigationPropertyView}
   */
  JPAEdmNavigationPropertyView getJPAEdmNavigationPropertyView();

  /**
   * The method returns a JPA EDM Entity Type view that holds the property
   * view.
   * 
   * @return an instance of type {@link org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmEntityTypeView}
   */
  JPAEdmEntityTypeView getJPAEdmEntityTypeView();

  /**
   * The method returns a JPA EDM Complex Type view that holds the property
   * view.
   * 
   * @return an instance of type {@link org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmComplexTypeView}
   */
  JPAEdmComplexTypeView getJPAEdmComplexTypeView();

  /**
   * The method returns a list of JPA Join Column Annotations for the given JPA Attribute
   * @return
   * a list of Array of Strings. First element in the Array represents the join column name and the second element in
   * the array represents the referencedColumn name
   */
  List<String[]> getJPAJoinColumns();
}