/**
    * Copyright 2005-2012 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.datadictionary.validation.constraint.provider;
  
  import org.kuali.rice.krad.datadictionary.validation.capability.Constrainable;
  import org.kuali.rice.krad.datadictionary.validation.constraint.Constraint;
  import org.kuali.rice.krad.datadictionary.validation.constraint.resolver.ConstraintResolver;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * A class that implements a simple in memory storage map of constraint resolvers. This provides a convenient base class
   * from which other constraint providers can be derived. 
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   * @since 1.1
   */
  public abstract class BaseConstraintProvider<T extends Constrainable> implements ConstraintProvider<T> {
  	
  	
  	protected Map<String, ConstraintResolver<T>> resolverMap;
  	
  	public void init() {
  		if (resolverMap == null)
  			resolverMap = new HashMap<String, ConstraintResolver<T>>();
  
  	}
  	
  	/**
  	 * @see org.kuali.rice.krad.datadictionary.validation.constraint.provider.ConstraintProvider#getConstraints(org.kuali.rice.krad.datadictionary.validation.capability.Constrainable, java.lang.Class)
  	 */
  	@Override
  	public List<Constraint> getConstraints(T definition, Class<? extends Constraint> constraintType) {
  		if (resolverMap == null)
  			init();
  		
  		ConstraintResolver<T> resolver = resolverMap.get(constraintType.getName());
  
  		if (resolver == null)
  			return null;
  		
  		return resolver.resolve(definition);
  	}
  
  	/**
  	 * @return the resolverMap
  	 */
  	public Map<String, ConstraintResolver<T>> getResolverMap() {
  		return this.resolverMap;
  	}
  
  	/**
  	 * @param resolverMap the resolverMap to set
  	 */
  	public void setResolverMap(Map<String, ConstraintResolver<T>> resolverMap) {
  		this.resolverMap = resolverMap;
  	}
  	
  }