/*

  * 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 javax.faces.component;

 import java.beans.PropertyDescriptor;

 import java.lang.ref.Reference;

 import java.lang.ref.SoftReference;

 import java.lang.reflect.Method;

 class _PropertyDescriptorHolder

 {

     private final PropertyDescriptor _descriptor;

     private Reference<Method> _readMethodRef;

     private Reference<Method> _writeMethodRef;

     public _PropertyDescriptorHolder(PropertyDescriptor descriptor)

     {

         _descriptor = descriptor;

         _readMethodRef = new SoftReference<Method>(_descriptor.getReadMethod());

     }

     public _PropertyDescriptorHolder(PropertyDescriptor descriptor, Method readMethod)

     {

         _descriptor = descriptor;

         _readMethodRef = new SoftReference<Method>(readMethod);

     }

     public String getName()

     {

         return _descriptor.getName();

     }

     public Method getReadMethod()

     {

         Method readMethod = _readMethodRef.get();

         if (readMethod == null)

         {

             readMethod = _descriptor.getReadMethod();

             _readMethodRef = new SoftReference<Method>(readMethod);

         }

         return readMethod;

     }

     public Method getWriteMethod()

     {

         if (_writeMethodRef == null || _writeMethodRef.get() == null)

         {

             // In facelets, the Method instance used to write the variable is stored

             // in a variable (see org.apache.myfaces.view.facelets.tag.BeanPropertyTagRule),

             // so the impact of this synchronized call at the end is minimal compared with 

             // getReadMethod. That's the reason why cache it here in a lazy way is enough

             // instead retrieve it as soon as this holder is created.

             Method writeMethod = _descriptor.getWriteMethod();

             _writeMethodRef = new SoftReference<Method>(writeMethod);

         }

         return _writeMethodRef.get();

     }

     public PropertyDescriptor getPropertyDescriptor()

     {

         return _descriptor;

     }

 }