/*******************************************************************************
 * Copyright (c) 1998, 2008 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 ******************************************************************************/  
 package org.eclipse.persistence.internal.oxm.record;

import org.eclipse.persistence.internal.oxm.ContainerValue;
import org.eclipse.persistence.internal.oxm.Reference;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.oxm.record.UnmarshalRecord;

/**
 * The UnmarshalContext allows mappings to be unmarshalled differently depending 
 * on the type of object.  An UnmarshalRecord maintains a reference to a single
 * UnmarshalContext.
 */
public interface UnmarshalContext {

	/**
	 * An event indicating that startElement has been called on the unmarshalRecord.
	 * @param unmarshalRecord The UnmarshalRecord that received the startElement call.
	 */
    public void startElement(UnmarshalRecord unmarshalRecord);

    /**
	 * An event indicating that characters has been called on the unmarshalRecord.
	 * @param unmarshalRecord The UnmarshalRecord that received the characters call.
     */
    public void characters(UnmarshalRecord unmarshalRecord);

    /**
	 * An event indicating that endElement has been called on the unmarshalRecord.
	 * @param unmarshalRecord The UnmarshalRecord that received the endElement call.
     */
    public void endElement(UnmarshalRecord unmarshalRecord);

    /**
     * The UnmarshalContext is responsible for assigning values to the object being 
     * built.
     * @param unmarshalRecord
     * @param value
     * @param mapping
     */
    public void setAttributeValue(UnmarshalRecord unmarshalRecord, Object value, DatabaseMapping mapping);

    /**
     * When a collection mapping is processed the UnmarshalContext is responsible for
     * handling the values one at a time.
     * @param unmarshalRecord
     * @param containerValue A container object such as a java.util.ArrayList, to which 
     * the value will be added.
     * @param value The value to be added to the container,
     */
    public void addAttributeValue(UnmarshalRecord unmarshalRecord, ContainerValue containerValue, Object value);

    /**
     * When a collection mapping is processed the UnmarshalContext is responsible for
     * handling the values one at a time.
     * @param unmarshalRecord
     * @param containerValue A container object such as a java.util.ArrayList, to which 
     * the value will be added.
     * @param value The value to be added to the container,
     * @param collection
     */
    public void addAttributeValue(UnmarshalRecord unmarshalRecord, ContainerValue containerValue, Object value, Object collection);

    /*
     * When a Reference is built the UnmarshalContext is given the ability to perform
     * further processing on it. 
     * @param reference
     */
    public void reference(Reference reference);

    /**
     * This method is called when unmapped content (XML content that does not correspond to 
     * any specified mapping, policy, etc.) is encountered during the unmarshal process.  
     * @param unmarshalRecord The UnmarshalRecord that encountered the unmapped content .
     */
    public void unmappedContent(UnmarshalRecord unmarshalRecord);

}