/**
    * Copyright 2005-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.krad.data.metadata.impl;
  
  import java.util.Collections;
  import java.util.List;
  
  import org.kuali.rice.krad.data.metadata.DataObjectCollection;
  import org.kuali.rice.krad.data.metadata.DataObjectCollectionSortAttribute;
  
  /**
  * Collection meta data.
  *
  * <p>
  * Implementation that represents the meta data for a collection in a data object.
  * </p>
  *
  * @author Kuali Rice Team (rice.collab@kuali.org)
  */
  public class DataObjectCollectionImpl extends MetadataChildBase implements DataObjectCollection {
  	private static final long serialVersionUID = -785119931770775640L;
  
  	protected DataObjectCollection embeddedCollection;
  
      protected String elementLabel;
  	protected Long minItems;
  	protected Long maxItems;
  	protected List<DataObjectCollectionSortAttribute> defaultOrdering;
  	protected Boolean indirectCollection;
  
      /**
      * The elementLabel defines the name to be used for a single object within the collection.
      *
      * <p>
      * For example: "Address" may be the name of one object within the "Addresses" collection.
      * </p>
      */
      @Override
  	public String getElementLabel() {
  		if (elementLabel == null) {
  			elementLabel = getLabelFromPropertyName(relatedType.getSimpleName());
  		}
          return elementLabel;
      }
  
      /**
      * Sets name used for single object within collection.
      *
      * @param elementLabel single object name
      */
      public void setElementLabel(String elementLabel) {
          this.elementLabel = elementLabel;
      }
  
  	@Override
  	public Long getMinItems() {
  		if (minItems != null) {
  			return minItems;
  		}
  		if (embeddedCollection != null) {
  			return embeddedCollection.getMinItems();
  		}
  		return null;
      }
  
      /**
      * Sets minimum items in collection.
      *
      * @param minOccurs minimum items in collection.
      */
  	public void setMinItemsInCollection(Long minOccurs) {
  		this.minItems = minOccurs;
      }
  
      /**
      * {@inheritDoc}
      */
  	@Override
  	public Long getMaxItems() {
  		if (maxItems != null) {
  			return maxItems;
  		}
  		if (embeddedCollection != null) {
  			return embeddedCollection.getMaxItems();
  		}
  		return null;
     }
 
     /**
     * Sets maximum items in collection.
     *
     * @param maxOccurs maximum items in collection.
     */
 	public void setMaxItemsInCollection(Long maxOccurs) {
 		this.maxItems = maxOccurs;
     }
 
     /**
     * {@inheritDoc}
     */
 	@Override
 	public List<DataObjectCollectionSortAttribute> getDefaultOrdering() {
 		if (defaultOrdering != null) {
 			return defaultOrdering;
 		}
 		if (embeddedCollection != null) {
 			return embeddedCollection.getDefaultOrdering();
 		}
 		return Collections.emptyList();
 	}
 
     /**
     * Sets attribute that the default order of the collection.
     *
     * @param defaultCollectionOrdering attribute name
     */
 	public void setDefaultCollectionOrderingAttributeNames(
 			List<DataObjectCollectionSortAttribute> defaultCollectionOrdering) {
 		this.defaultOrdering = defaultCollectionOrdering;
 	}
 
     /**
     * {@inheritDoc}
     */
 	@Override
 	public boolean isIndirectCollection() {
 		if (indirectCollection != null) {
 			return indirectCollection;
 		}
 		if (embeddedCollection != null) {
 			return embeddedCollection.isIndirectCollection();
 		}
 		return false;
 	}
 
     /**
     * Sets whether linked item is used.
     *
     * @param indirectCollection whether link item used.
     */
 	public void setIndirectCollection(boolean indirectCollection) {
 		this.indirectCollection = indirectCollection;
 	}
 
     /**
     * Gets the embedded collection.
     *
     * @return the embedded collection, if it exists.
     */
 	public DataObjectCollection getEmbeddedCollection() {
 		return embeddedCollection;
 	}
 
 	public void setEmbeddedCollection(DataObjectCollection embeddedCollection) {
 		this.embeddedCollection = embeddedCollection;
 		setEmbeddedMetadataChild(embeddedCollection);
 	}
 
 }