/*
    * Copyright 2012 Vincent Demeester<vincent+shortbrain@demeester.fr>.
    * 
    * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.shortbrain.vaadin.container.property;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
  import java.util.LinkedList;
  import java.util.List;
  
  /**
   * Implementation of {@link PropertyReaderAlgorithm} that looks for method
   * (getter) of the beanClass.
   * 
   * @author Vincent Demeester <vincent@demeester.fr>
   * 
   */
  public class GetterReaderAlgorithm implements PropertyReaderAlgorithm {
  
  	public GetterReaderAlgorithm() {
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public List<PropertyMetadata> getProperties(Class<?> beanClass) {
  		if (beanClass == null) {
  			throw new IllegalArgumentException("beanClass cannot be null.");
  		}
  		List<PropertyMetadata> metadatas = new LinkedList<PropertyMetadata>();
  		for (Method method : beanClass.getDeclaredMethods()) {
  			if (Modifier.isPublic(method.getModifiers())
  					&& method.getName().startsWith("get")) {
  				String propertyName = method.getName().substring(3);
  				Class<?> propertyClass = method.getReturnType();
  				String propertyAttribute = propertyName;
  				PropertyMetadata metadata = new PropertyMetadata(propertyName,
  						propertyClass, null, propertyAttribute);
  				metadatas.add(metadata);
  			}
  		}
  		return metadatas;
  	}
  }