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/*
 * Copyright (C) 2004, 2006 Joe Walnes.
 * Copyright (C) 2006, 2007 XStream Committers.
 * All rights reserved.
 *
 * The software in this package is published under the terms of the BSD
 * style license a copy of which has been included with this distribution in
 * the LICENSE.txt file.
 * 
 * Created on 07. March 2004 by Joe Walnes
 */
package com.thoughtworks.xstream.converters.reflection;

import java.lang.reflect.Field;

/**
 * Provides core reflection services.
 * 
 * @author Joe Walnes
 */
public interface ReflectionProvider {

	/**
	 * Creates a new instance of the specified type. It is in the responsibility
         * of the implementation how such an instance is created.
	 * @param type	the type to instantiate
	 * @return	a new instance of this type
	 */
    Object newInstance(Class type);

    void visitSerializableFields(Object object, Visitor visitor);

    void writeField(Object object, String fieldName, Object value, Class definedIn);

    Class getFieldType(Object object, String fieldName, Class definedIn);

    boolean fieldDefinedInClass(String fieldName, Class type);

    /**
     * A visitor interface for serializable fields defined in a class.
     *
     */
    interface Visitor {

    	/**
    	 * Callback for each visit
    	 * @param name	field name
    	 * @param type	field type
    	 * @param definedIn	where the field was defined
    	 * @param value	field value
    	 */
        void visit(String name, Class type, Class definedIn, Object value);
    }

    /**
     * Returns a field defined in some class.
     * @param definedIn	class where the field was defined
     * @param fieldName	field name
     * @return	the field itself
     */
	Field getField(Class definedIn, String fieldName);

}