/*
 * Copyright 2010-2012 Luca Garulli (l.garulli--at--orientechnologies.com)
 *
 * 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 com.orientechnologies.orient.core.db.record;

import com.orientechnologies.common.collection.OMultiValue;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.record.ORecord;

/**
 * Lazy implementation of ArrayList. It's bound to a source ORecord object to keep track of changes. This avoid to call the
 * makeDirty() by hand when the list is changed.
 * 
 * @author Luca Garulli (l.garulli--at--orientechnologies.com)
 * 
 */
public class ORecordMultiValueHelper {
	public enum MULTIVALUE_CONTENT_TYPE {
		EMPTY, ALL_RECORDS, ALL_RIDS, HYBRID
	}

	public static MULTIVALUE_CONTENT_TYPE updateContentType(final MULTIVALUE_CONTENT_TYPE iPreviousStatus, final Object iValue) {
		if (iPreviousStatus == MULTIVALUE_CONTENT_TYPE.HYBRID) {
			// DO NOTHING

		} else if (iPreviousStatus == MULTIVALUE_CONTENT_TYPE.EMPTY) {
			if (iValue instanceof ORID)
				return MULTIVALUE_CONTENT_TYPE.ALL_RIDS;
			else if (iValue instanceof ORecord<?>)
				return MULTIVALUE_CONTENT_TYPE.ALL_RECORDS;
			else
				return MULTIVALUE_CONTENT_TYPE.HYBRID;

		} else if (iPreviousStatus == MULTIVALUE_CONTENT_TYPE.ALL_RECORDS) {
			if (iValue instanceof ORID)
				return MULTIVALUE_CONTENT_TYPE.HYBRID;

		} else if (iPreviousStatus == MULTIVALUE_CONTENT_TYPE.ALL_RIDS) {
			if (!(iValue instanceof ORID))
				return MULTIVALUE_CONTENT_TYPE.HYBRID;
		}
		return iPreviousStatus;
	}

	public static String toString(final ORecordLazyMultiValue iMultivalue) {
		final boolean previousAutoConvertSetting = iMultivalue.isAutoConvertToRecord();
		iMultivalue.setAutoConvertToRecord(false);

		final String result = OMultiValue.toString(iMultivalue);

		iMultivalue.setAutoConvertToRecord(previousAutoConvertSetting);
		return result;
	}
}
