import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
/**
 * return the X9ECParameters object for the named curve represented by
 * the passed in object identifier. Null if the curve isn't present.
 *
 * @param oid an object identifier representing a named curve, if present.
 */
public static X9ECParameters getByOID(
    ASN1ObjectIdentifier oid)
{
    X9ECParametersHolder holder = (X9ECParametersHolder)curves.get(oid);

    if (holder != null)
    {
        return holder.getParameters();
    }

    return null;
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurveWithOID(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
{
    names.addElement(name);
    oidToName.put(oid, name);
    oidToCurve.put(oid, holder);
    name = Strings.toLowerCase(name);
    nameToOID.put(name, oid);
    nameToCurve.put(name, holder);
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
/**
 * return the X9ECParameters object for the named curve represented by
 * the passed in object identifier. Null if the curve isn't present.
 *
 * @param oid an object identifier representing a named curve, if present.
 */
public static X9ECParameters getByOID(
    ASN1ObjectIdentifier oid)
{
    X9ECParametersHolder holder = (X9ECParametersHolder)curves.get(oid);
    return holder == null ? null : holder.getParameters();
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurveWithOID(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
{
    nameToCurve.put(name, holder);
    nameToOID.put(name, oid);
    oidToName.put(oid, name);
    oidToCurve.put(oid, holder);
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
{
    objIds.put(name, oid);
    names.put(oid, name);
    curves.put(oid, holder);
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurve(String name, X9ECParametersHolder holder)
{
    names.addElement(name);
    name = Strings.toLowerCase(name);
    nameToCurve.put(name, holder);
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
public static X9ECParameters getByName(String name)
{
    X9ECParametersHolder holder = (X9ECParametersHolder)nameToCurve.get(Strings.toLowerCase(name));
    return holder == null ? null : holder.getParameters();
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
{
    objIds.put(name.toLowerCase(), oid);
    names.put(oid, name);
    curves.put(oid, holder);
}
 

import org.bouncycastle.asn1.x9.X9ECParametersHolder; //导入依赖的package包/类
static void defineCurve(String name, X9ECParametersHolder holder)
{
    nameToCurve.put(name, holder);
}