derbmpstring.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 78 行

package org.bouncycastle.asn1;

import java.io.*;

/**
 * DER BMPString object.
 */
public class DERBMPString
    extends DERObject
    implements DERString
{
    String  string;

    /**
     * basic constructor - byte encoded string.
     */
    public DERBMPString(
        byte[]   string)
    {
        char[]  cs = new char[string.length / 2];

        for (int i = 0; i != cs.length; i++)
        {
            cs[i] = (char)((string[2 * i] << 8) | (string[2 * i + 1] & 0xff));
        }

        this.string = new String(cs);
    }

    /**
     * basic constructor
     */
    public DERBMPString(
        String   string)
    {
        this.string = string;
    }

    public String getString()
    {
        return string;
    }

    public int hashCode()
    {
        return this.getString().hashCode();
    }

    public boolean equals(
        Object  o)
    {
        if (!(o instanceof DERBMPString))
        {
            return false;
        }

        DERPrintableString  s = (DERPrintableString)o;

        return this.getString().equals(s.getString());
    }

    void encode(
        DEROutputStream  out)
        throws IOException
    {
        char[]  c = string.toCharArray();
        byte[]  b = new byte[c.length * 2];

        for (int i = 0; i != c.length; i++)
        {
            b[2 * i] = (byte)(c[i] >> 8);
            b[2 * i + 1] = (byte)c[i];
        }

        out.writeEncoded(BMP_STRING, b);
    }
}