/**
    * Copyright 2010-2013 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.common.util.nullify;
  
  import java.lang.reflect.InvocationTargetException;
  import java.util.Arrays;
  import java.util.List;
  
  import org.apache.commons.beanutils.PropertyUtils;
  import org.kuali.common.util.Str;
  import org.springframework.util.Assert;
  
  public class BeanNullifier implements Nullifier {
  
  	Object bean;
  	List<String> properties;
  	List<String> nullTokens = Arrays.asList(NullUtils.NULL);
  	boolean caseSensitive = false;
  
  	@Override
  	public void nullify() {
  		Assert.notNull(bean, "bean cannot be null");
  		Assert.notNull(properties, "properties cannot be null");
  		Assert.notNull(nullTokens, "nullTokens cannot be null");
  
  		for (String property : properties) {
  			Object value = getProperty(bean, property);
  			if (isNullify(value, nullTokens, caseSensitive)) {
  				setProperty(bean, property, null);
  			}
  		}
  	}
  
  	protected boolean isNullify(Object value, List<String> nullTokens, boolean caseSensitive) {
  		if (value == null) {
  			return false;
  		} else {
  			return Str.contains(nullTokens, value.toString(), caseSensitive);
  		}
  	}
  
  	protected void setProperty(Object bean, String property, Object value) {
  		try {
  			PropertyUtils.setProperty(bean, property, value);
  		} catch (NoSuchMethodException e) {
  			throw new IllegalArgumentException(e);
  		} catch (InvocationTargetException e) {
  			throw new IllegalArgumentException(e);
  		} catch (IllegalAccessException e) {
  			throw new IllegalArgumentException(e);
  		}
  	}
  
  	protected Object getProperty(Object bean, String property) {
  		try {
  			return PropertyUtils.getProperty(bean, property);
  		} catch (NoSuchMethodException e) {
  			throw new IllegalArgumentException(e);
  		} catch (InvocationTargetException e) {
  			throw new IllegalArgumentException(e);
  		} catch (IllegalAccessException e) {
  			throw new IllegalArgumentException(e);
  		}
  	}
  
  	public Object getBean() {
  		return bean;
  	}
  
  	public void setBean(Object bean) {
  		this.bean = bean;
  	}
  
  	public List<String> getProperties() {
  		return properties;
  	}
  
  	public void setProperties(List<String> properties) {
  		this.properties = properties;
  	}
  
  	public List<String> getNullTokens() {
  		return nullTokens;
  	}
  
  	public void setNullTokens(List<String> nullTokens) {
 		this.nullTokens = nullTokens;
 	}
 
 	public boolean isCaseSensitive() {
 		return caseSensitive;
 	}
 
 	public void setCaseSensitive(boolean caseSensitive) {
 		this.caseSensitive = caseSensitive;
 	}
 
 }