/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 java.beans;

/**
 * Describes a bean's global information.
 */
public class BeanDescriptor extends FeatureDescriptor {

    private Class<?> beanClass;

    private Class<?> customizerClass;

    /**
     * <p>
     * Constructs an instance with the bean's {@link Class} and a customizer
     * {@link Class}. The descriptor's {@link #getName()} is set as the
     * unqualified name of the <code>beanClass</code>.
     * </p>
     * 
     * @param beanClass
     *            The bean's Class.
     * @param customizerClass
     *            The bean's customizer Class.
     */
    public BeanDescriptor(Class<?> beanClass, Class<?> customizerClass) {
        if (beanClass == null) {
            throw new NullPointerException();
        }
        setName(getShortClassName(beanClass));
        this.beanClass = beanClass;
        this.customizerClass = customizerClass;
    }

    /**
     * <p>
     * Constructs an instance with the bean's {@link Class}. The descriptor's
     * {@link #getName()} is set as the unqualified name of the
     * <code>beanClass</code>.
     * </p>
     * 
     * @param beanClass
     *            The bean's Class.
     */
    public BeanDescriptor(Class<?> beanClass) {
        this(beanClass, null);
    }

    /**
     * <p>
     * Gets the bean's customizer {@link Class}/
     * </p>
     * 
     * @return A {@link Class} instance or <code>null</code>.
     */
    public Class<?> getCustomizerClass() {
        return customizerClass;
    }

    /**
     * <p>
     * Gets the bean's {@link Class}.
     * </p>
     * 
     * @return A {@link Class} instance.
     */
    public Class<?> getBeanClass() {
        return beanClass;
    }

    /**
     * <p>
     * Utility method for getting the unqualified name of a {@link Class}.
     * </p>
     * 
     * @param leguminaClass
     *            The Class to get the name from.
     * @return A String instance or <code>null</code>.
     */
    private String getShortClassName(Class<?> leguminaClass) {
        if(leguminaClass == null) {
            return null;
        }
        String beanClassName = leguminaClass.getName();
        int lastIndex = beanClassName.lastIndexOf("."); //$NON-NLS-1$
        return (lastIndex == -1) ? beanClassName : beanClassName.substring(lastIndex + 1);
    }

}