beancreationchain.java

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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * 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.apache.commons.betwixt.io.read;

/**  
  * A Chain of bean creators.
  *
  * @author Robert Burrell Donkin
  * @since 0.5
  */
public abstract class BeanCreationChain {

    
//-------------------------------------------------------- Class Methods

    /** 
     * Creates the default <code>BeanCreationChain</code> used when reading beans.
     * @return a <code>BeanCreationList</code> with the default creators loader in order, not null
     */
    public static final BeanCreationChain createDefaultChain() {
        // this delegates to the list but this is the canonical version
        // the implementation may change later
        return BeanCreationList.createStandardChain();
    }
    
//-------------------------------------------------------- Instance Methods

    /** 
      * Create a bean for the given mapping in the given context.
      *
      * @param elementMapping specifies the mapping between the type and element.
      * <strong>Note</strong> it is recommended that classes do not store a permenant
      * reference to this object since these objects may later be reused.
      * Not null
      * @param context the context in which this creation happens, not null
      * @return the bean, possibly null
      */
    public abstract Object create(ElementMapping elementMapping, ReadContext context);
    
}