/*
    * Copyright 2007 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.uif.util;
  
  import org.springframework.beans.BeanWrapper;
  import org.springframework.beans.BeanWrapperImpl;
  import org.springframework.beans.BeansException;
  
  import java.beans.PropertyDescriptor;
  import java.util.Map;
  
  /**
   * Utility methods to get/set property values and working with objects
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   * @see org.springframework.beans.BeanWrapper
   */
  public class ObjectPropertyUtils {
  	private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(ObjectPropertyUtils.class);
  
  	public static void copyPropertiesToObject(Map<String, String> properties, Object object) {
  		for (Map.Entry<String, String> property : properties.entrySet()) {
  			setPropertyValue(object, property.getKey(), property.getValue());
  		}
  	}
  
  	public static PropertyDescriptor[] getPropertyDescriptors(Object object) {
  		return wrapObject(object).getPropertyDescriptors();
  	}
  
  	public static Class<?> getPropertyType(Class<?> object, String propertyPath) {
  		return new BeanWrapperImpl(object).getPropertyType(propertyPath);
  	}
  
  	public static Class<?> getPropertyType(Object object, String propertyPath) {
  		return wrapObject(object).getPropertyType(propertyPath);
  	}
  
  	@SuppressWarnings("unchecked")
  	public static <T extends Object> T getPropertyValue(Object object, String propertyPath) {
  	    T result = null;
  	    try {
  	        result = (T) wrapObject(object).getPropertyValue(propertyPath);
  	    } catch (RuntimeException e) {
  	        throw new RuntimeException("Error getting property '" + propertyPath + "' from " + object, e);
  	    }
  	    return result;
  	}
  
  	public static void initializeProperty(Object object, String propertyPath) {
  		Class<?> propertyType = getPropertyType(object, propertyPath);
  		try {
  			setPropertyValue(object, propertyPath, propertyType.newInstance());
  		}
  		catch (Exception e) {
  			throw new RuntimeException("Unable to set new instance for property: " + propertyPath, e);
  		}
  	}
  
  	public static void setPropertyValue(Object object, String propertyPath, Object propertyValue) {
  		wrapObject(object).setPropertyValue(propertyPath, propertyValue);
  	}
  
  	public static void setPropertyValue(Object object, String propertyPath, Object propertyValue, boolean ignoreUnknown) {
  		try {
  			wrapObject(object).setPropertyValue(propertyPath, propertyValue);
  		}
  		catch (BeansException e) {
  			// only throw exception if they have indicated to not ignore unknown
  			if (!ignoreUnknown) {
  				throw new RuntimeException(e);
  			}
  			if (LOG.isTraceEnabled()) {
  				LOG.trace("Ignoring exception thrown during setting of property '" + propertyPath + "': "
  						+ e.getLocalizedMessage());
  			}
  		}
  	}
  	
      public static boolean isReadableProperty(Object object, String propertyPath) {
          return wrapObject(object).isReadableProperty(propertyPath);
      }
  
      public static boolean isWritableProperty(Object object, String propertyPath) {
          return wrapObject(object).isWritableProperty(propertyPath);
      }
 
 	public static BeanWrapper wrapObject(Object object) {
 		BeanWrapper beanWrapper = new BeanWrapperImpl(object);
 		beanWrapper.setAutoGrowNestedPaths(true);
 		
 		return beanWrapper;
 	}
 
 }