gurux.dlms.asn.GXAsn1Integer Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of gurux.dlms Show documentation
gurux.dlms.java package is used to communicate with DLMS devices.
The newest version!
//
// --------------------------------------------------------------------------
//  Gurux Ltd
// 
//
//
// Filename:        $HeadURL$
//
// Version:         $Revision$,
//                  $Date$
//                  $Author$
//
// Copyright (c) Gurux Ltd
//
//---------------------------------------------------------------------------
//
//  DESCRIPTION
//
// This file is a part of Gurux Device Framework.
//
// Gurux Device Framework is Open Source software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License 
// as published by the Free Software Foundation; version 2 of the License.
// Gurux Device Framework is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of 
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
// See the GNU General Public License for more details.
//
// More information of Gurux products: https://www.gurux.org
//
// This code is licensed under the GNU General Public License v2. 
// Full text may be retrieved at http://www.gnu.org/licenses/gpl-2.0.txt
//---------------------------------------------------------------------------

package gurux.dlms.asn;

import java.math.BigInteger;

import gurux.dlms.GXByteBuffer;

/**
 * ASN1 bit string
 */
public class GXAsn1Integer extends Number {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    /**
     * Bit string.
     */
    private byte[] value;

    /**
     * Constructor.
     */
    public GXAsn1Integer() {

    }

    /**
     * Constructor
     * 
     * @param data
     *            Integer value.
     */
    public GXAsn1Integer(final long data) {
        GXByteBuffer bb = new GXByteBuffer();
        bb.setUInt32(data);
        value = bb.array();
    }

    /**
     * Constructor
     * 
     * @param data
     *            Integer.
     */
    public GXAsn1Integer(final byte[] data) {
        if (data == null) {
            throw new IllegalArgumentException("data");
        }
        value = data;
    }

    /**
     * Constructor
     * 
     * @param data
     *            Data.
     * @param index
     *            Index.
     * @param count
     *            Count.
     */
    public GXAsn1Integer(final byte[] data, final int index, final int count) {
        if (data == null || data.length < index + count) {
            throw new IllegalArgumentException("data");
        }
        value = new byte[count];
        System.arraycopy(data, index, value, 0, count);
    }

    /**
     * Constructor
     * 
     * @param data
     *            Integer.
     */
    public GXAsn1Integer(final String data) {
        if (data == null) {
            throw new IllegalArgumentException("data");
        }
        value = new BigInteger(data).toByteArray();
    }

    /**
     * @return Bit string.
     */
    public final byte[] getByteArray() {
        return value;
    }

    /**
     * @return Get integer value as int.
     */
    public final byte toByte() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return bb.getInt8();
    }

    /**
     * @return Get integer value as short.
     */
    public final short toShort() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return bb.getInt16();
    }

    @Override
    public final String toString() {
        String str;
        switch (value.length) {
        case 1:
            str = String.valueOf(toByte());
            break;
        case 2:
            str = String.valueOf(toShort());
            break;
        case 4:
            str = String.valueOf(intValue());
            break;
        case 8:
            str = String.valueOf(longValue());
            break;
        default:
            str = new BigInteger(value).toString();
        }
        return str;
    }

    @Override
    public int intValue() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return bb.getInt32();
    }

    @Override
    public long longValue() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return bb.getInt64();
    }

    @Override
    public float floatValue() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return (float) bb.getInt64();
    }

    @Override
    public double doubleValue() {
        GXByteBuffer bb = new GXByteBuffer(value);
        return (double) bb.getInt64();
    }
}