/*
 * 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.DoubleSeqProperty;
import org.csstudio.dal.LongSeqAccess;
import org.csstudio.dal.SequencePropertyCharacteristics;
import org.csstudio.dal.context.PropertyContext;

/**
 * Default implementation of DoubleSeqProperty
 *
 */
public class DoubleSeqPropertyImpl extends NumericPropertyImpl<double[],Double> implements DoubleSeqProperty{
	private int sequenceLength;
	private boolean chInitialized = false;
	
	/**
	 * Creates a new DoubleSeqPropertyImpl object.
	 *
	 * @param name property name
	 * @param propertyContext property context
	 */
	public DoubleSeqPropertyImpl(String name, PropertyContext propertyContext){
		super(double[].class, name, propertyContext);
		addDataAccessType(LongSeqAccess.class, LongSeqDataAccessWrapper.class);
	}

	private void readCharacteristics() throws DataExchangeException{
		if (chInitialized)
			return;
		Integer length = null;
		length = (Integer)getCharacteristic(SequencePropertyCharacteristics.C_SEQUENCE_LENGTH);
		if (length==null)
			throw new DataExchangeException(this, "Obtaining characteristic "+SequencePropertyCharacteristics.C_SEQUENCE_LENGTH+" failed for uknown reason.");
		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 Double getMinimum() throws DataExchangeException {
		return (Double)getCharacteristic(C_MINIMUM);
	}

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