/**
    * Copyright 2011 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.osedu.org/licenses/ECL-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.kuali.common.impex.model;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlAttribute;
  import javax.xml.bind.annotation.XmlElement;
  
  import org.kuali.common.util.CollectionUtils;
  
  /**
   * This class represents any named connection between columns
   */
  @XmlAccessorType(XmlAccessType.PROPERTY)
  public abstract class Constraint implements NamedElement {
  
  	String name;
  	List<String> columnNames = new ArrayList<String>();
  
  	/**
  	 * This is a copy constructor. It must create a perfect, deep, copy of this object
  	 */
  	public Constraint(Constraint constraint) {
  		this.name = constraint.getName();
  		this.columnNames = new ArrayList<String>(CollectionUtils.toEmptyList(constraint.getColumnNames()));
  	}
  
  	public Constraint() {
  		super();
  	}
  
  	public Constraint(List<String> columnNames, String name) {
  		this.columnNames = columnNames;
  		this.name = name;
  	}
  
  	@XmlElement(name = "column")
  	public List<String> getColumnNames() {
  		return columnNames;
  	}
  
  	@Override
  	@XmlAttribute
  	public String getName() {
  		return name;
  	}
  
  	public void setName(String name) {
  		this.name = name;
  	}
  
  	public void setColumnNames(List<String> columnNames) {
  		this.columnNames = columnNames;
  	}
  }