/**
 * Copyright (C) 2010-14 diirt developers. See COPYRIGHT.TXT
 * All rights reserved. Use is subject to license terms. See LICENSE.TXT
 */
package org.diirt.support.pva.adapters;


import java.util.List;

import org.epics.pvdata.pv.ByteArrayData;
import org.epics.pvdata.pv.PVByteArray;
import org.epics.pvdata.pv.PVField;
import org.epics.pvdata.pv.PVStructure;
import org.epics.pvdata.pv.PVUByteArray;
import org.diirt.vtype.VByteArray;
import org.diirt.vtype.VTypeToString;
import org.diirt.util.array.ArrayByte;
import org.diirt.util.array.ArrayInt;
import org.diirt.util.array.ListByte;
import org.diirt.util.array.ListInt;
import org.diirt.vtype.ArrayDimensionDisplay;
import org.diirt.vtype.ValueUtil;

/**
 * @author msekoranja
 *
 */
public class PVFieldToVByteArray extends AlarmTimeDisplayExtractor implements VByteArray {

        private final ListInt size;
        private final ListByte list;

        public PVFieldToVByteArray(PVStructure pvField, boolean disconnected) {
                this("value", pvField, disconnected);
        }

        public PVFieldToVByteArray(String fieldName, PVStructure pvField, boolean disconnected) {
                this(pvField.getSubField(fieldName), pvField, disconnected);
        }

        public PVFieldToVByteArray(PVField field, PVStructure pvParent, boolean disconnected) {
                super(pvParent, disconnected);

                if (field instanceof PVByteArray)
                {
                        PVByteArray valueField = (PVByteArray)field;

                        ByteArrayData data = new ByteArrayData();
                        valueField.get(0, valueField.getLength(), data);

                        this.size = new ArrayInt(data.data.length);
                        this.list = new ArrayByte(data.data);
                }
                else if (field instanceof PVUByteArray)
                {
                        PVUByteArray valueField = (PVUByteArray)field;

                        ByteArrayData data = new ByteArrayData();
                        valueField.get(0, valueField.getLength(), data);

                        this.size = new ArrayInt(data.data.length);
                        this.list = new ArrayByte(data.data);
                }
                else
                {
                        size = null;
                        list = null;
                }
        }

        /* (non-Javadoc)
         * @see org.epics.pvmanager.data.Array#getSizes()
         */
        @Override
        public ListInt getSizes() {
                return size;
        }

        /* (non-Javadoc)
         * @see org.epics.pvmanager.data.VByteArray#getData()
         */
        @Override
        public ListByte getData() {
                return list;
        }

    @Override
    public String toString() {
        return VTypeToString.toString(this);
    }

    @Override
    public List<ArrayDimensionDisplay> getDimensionDisplay() {
        return ValueUtil.defaultArrayDisplay(this);
    }

}