/*
 * 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 de.unioninvestment.eai.portal.portlet.crud.scripting.model;

import de.unioninvestment.eai.portal.portlet.crud.domain.model.ContainerBlob;
import de.unioninvestment.eai.portal.portlet.crud.domain.model.ContainerClob;
import de.unioninvestment.eai.portal.portlet.crud.domain.model.ContainerField;
import de.unioninvestment.eai.portal.portlet.crud.domain.support.map.ValueTransformer;

/**
 * Repräsentiert ein Datenfeld einer Zeile.
 * 
 * @author markus.bonsch
 * 
 */
public class ScriptField {

	static final ScriptToModelValueTransformer SCRIPT_TO_MODEL_VALUE_TRANSFORMER = new ScriptToModelValueTransformer();
	
	static final class ScriptToModelValueTransformer implements
			ValueTransformer<Object, Object> {
		@Override
		public Object transform(Object scriptValue) {
			if (scriptValue instanceof ScriptClob) {
				return ((ScriptClob) scriptValue).getContainerClob();
			} else if (scriptValue instanceof ScriptBlob) {
				return ((ScriptBlob) scriptValue).getContainerBlob();
			} else {
				return scriptValue;
			}
		}
	}

	private ContainerField containerField;

	/**
	 * Konstruktor.
	 * 
	 * @param containerField
	 *            Feld
	 */
	ScriptField(ContainerField containerField) {
		this.containerField = containerField;
	}

	/**
	 * 
	 * @return - Spaltenname des Feldes
	 */
	public String getName() {
		return containerField.getName();
	}

	/**
	 * 
	 * @return - Feldwert
	 */
	public Object getValue() {
		Object value = containerField.getValue();
		if (value instanceof ContainerClob) {
			value = new ScriptClob((ContainerClob) value);
		} else if (value instanceof ContainerBlob) {
			value = new ScriptBlob((ContainerBlob) value);
		}
		return value;
	}

	/**
	 * Setzt für das Feld einen neuen Wert.
	 * 
	 * @param value
	 *            Feldwert
	 */
	public void setValue(Object value) {
		containerField.setValue(SCRIPT_TO_MODEL_VALUE_TRANSFORMER.transform(value));
	}

	/**
	 * Gibt zurück ob das Feld verändert wurde.
	 * 
	 * @return true bei Feldänderung, sonst false
	 */
	public boolean isModified() {
		return containerField.isModified();
	}
}