/**
 *
 *  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 com.agfa.hap.sdo.mapper;

import java.util.Collection;
import java.util.Iterator;

import com.agfa.hap.sdo.DataMapper;
import com.agfa.hap.sdo.PartialDataObject;
import com.agfa.hap.sdo.Property;
import com.agfa.hap.sdo.SnapshotDefinition;
import com.agfa.hap.sdo.Type;

/**
 * @author awvjz
 * 
 * this datamapper wraps another datamapper and delegates to this second mapper in case the object it has to work with are not partialdataobjects
 *
 */
public class DelegatingPartialDataObjectMapper<T> implements DataMapper<T> {
	private DataMapper<T> delegate; 
	private PartialDataObjectMapper defaultMapper = new PartialDataObjectMapper();
	
	public DelegatingPartialDataObjectMapper(DataMapper<T> delegateDataMapper){	
		delegate = delegateDataMapper;
	}

	public T create(Type type) {
		T instance = delegate.create(type);
		if (instance == null){
			return (T) defaultMapper.create(type);
		}
		return instance;		
	}

	public Type getCorrespondingType(Class clazz) {
		Type type = null;
		try {
			type = delegate.getCorrespondingType(clazz);
		} catch (IllegalArgumentException e){
			//no type was found
		}
		if (type == null){
			return defaultMapper.getCorrespondingType(clazz);
		}
		return type;
	}


	public Object getProperty(T object, Property property) {
		if (object instanceof PartialDataObject){
			return defaultMapper.getProperty((PartialDataObject) object, property);
		}
		return delegate.getProperty(object, property);
	}


	public T newProxy(Type type, Object identity) {
		T proxy = delegate.newProxy(type, identity);
		if (proxy == null){
			return (T) defaultMapper.newProxy(type, identity);
		}
		return proxy;
	}


	public Iterator<? extends T> getObjects(T object, Property property) {
		if (object instanceof PartialDataObject){
			return (Iterator<? extends T>) defaultMapper.getObjects((PartialDataObject) object, property);
		}
		return delegate.getObjects(object, property);
	}


	public Type getType(T object) {
		if (object instanceof PartialDataObject){
			return defaultMapper.getType((PartialDataObject) object);			
		}
		return delegate.getType(object);
	}


	public boolean isProxy(T object) {
		if (object instanceof PartialDataObject){
			return defaultMapper.isProxy((PartialDataObject) object);			
		}
		return delegate.isProxy(object);
	}


	public void setProperty(T object, Property property, Object value) {
		if (object instanceof PartialDataObject){
			defaultMapper.setProperty((PartialDataObject) object, property, value);
		} else {
			delegate.setProperty(object, property, value);
		}
	}


	public void setUnavailable(T object, Property property) {
		if (object instanceof PartialDataObject){
			defaultMapper.setUnavailable((PartialDataObject) object, property);
		} else {
			delegate.setUnavailable(object, property);
		}		
	}

	public Collection<T> getProperties(Collection<T> object, Property bulkProperty, SnapshotDefinition def) {
		return delegate.getProperties(object, bulkProperty, def);
	}

	public boolean isBulkProperty(Class clazz, Property property) {
		if (PartialDataObject.class.isAssignableFrom(clazz)) {
			return false;
		}
		return delegate.isBulkProperty(clazz, property);
	}
	
	

}