/*
 * Copyright (c) 2006 Stiftung Deutsches Elektronen-Synchroton,
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS.
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION,
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */

package org.csstudio.dal.impl;

import org.csstudio.dal.DataExchangeException;
import org.csstudio.dal.DoubleSeqAccess;
import org.csstudio.dal.LongSeqProperty;
import org.csstudio.dal.SequencePropertyCharacteristics;
import org.csstudio.dal.context.PropertyContext;


/**
 * Default implementation of LongSeqProperty
 *
  */
public class LongSeqPropertyImpl extends NumericPropertyImpl<long[],Long>
	implements LongSeqProperty
{
	private int sequenceLength;
	private boolean chInitialized = false;
	/**
	 * Creates a new LongSeqPropertyImpl object.
	 *
	 * @param name property name
	 * @param propertyContext property context
	 */
	public LongSeqPropertyImpl(String name, PropertyContext propertyContext)
	{
		super(long[].class, name, propertyContext);
		addDataAccessType(DoubleSeqAccess.class, DoubleSeqDataAccessWrapper.class);
	}

	
	private void readCharacteristics() throws DataExchangeException
	{
		if (chInitialized)
			return;
	
		Integer length = null;
		length = (Integer)getCharacteristic(SequencePropertyCharacteristics.C_SEQUENCE_LENGTH);
		sequenceLength = length.intValue();
		chInitialized = true;

	}


	/*
	 *  (non-Javadoc)
	 * @see org.csstudio.dal.SequenceAccess#getSequenceLength()
	 */
	@Override
	public int getSequenceLength() throws DataExchangeException
	{
		if (!chInitialized)
			readCharacteristics();
		return sequenceLength;
	}
	
	/* (non-Javadoc)
	 * @see org.csstudio.dal.NumericSimpleProperty#getMinimum()
	 */
	@Override
	public Long getMinimum() throws DataExchangeException {
		return (Long)getCharacteristic(C_MINIMUM);
	}

	/* (non-Javadoc)
	 * @see org.csstudio.dal.NumericSimpleProperty#getMaximum()
	 */
	@Override
	public Long getMaximum() throws DataExchangeException {
		return (Long)getCharacteristic(C_MAXIMUM);
	}
}

/* __oOo__ */