/**
 * 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.Arrays;
import java.util.Collections;
import java.util.List;

import org.epics.pvdata.pv.PVField;
import org.epics.pvdata.pv.PVStringArray;
import org.epics.pvdata.pv.PVStructure;
import org.epics.pvdata.pv.StringArrayData;
import org.diirt.vtype.VStringArray;
import org.diirt.vtype.VTypeToString;
import org.diirt.util.array.ArrayInt;
import org.diirt.util.array.ListInt;

/**
 * @author msekoranja
 *
 */
public class PVFieldToVStringArray extends AlarmTimeDisplayExtractor implements VStringArray {

        private final ListInt size;
        private final List<String> array;

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

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

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

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

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

                        this.size = new ArrayInt(data.data.length);
                        this.array = Collections.unmodifiableList(Arrays.asList(data.data));
                }
                else
                {
                        size = null;
                        array = null;
                }
        }

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

        /* (non-Javadoc)
         * @see org.epics.pvmanager.data.VStringArray#getArray()
         */
        @Override
        public List<String> getData() {
                return array;
        }

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

}