com.jingtum.core.bouncycastle.asn1.ASN1ObjectIdentifier Maven / Gradle / Ivy

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/*
 * Copyright www.jingtum.com Inc. 
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.jingtum.core.bouncycastle.asn1;

public class ASN1ObjectIdentifier
    extends DERObjectIdentifier
{
    public ASN1ObjectIdentifier(String identifier)
    {
        super(identifier);
    }

    ASN1ObjectIdentifier(byte[] bytes)
    {
        super(bytes);
    }

    ASN1ObjectIdentifier(ASN1ObjectIdentifier oid, String branch)
    {
        super(oid, branch);
    }

    /**
     * Return an OID that creates a branch under the current one.
     *
     * @param branchID node numbers for the new branch.
     * @return the OID for the new created branch.
     */
    public ASN1ObjectIdentifier branch(String branchID)
    {
        return new ASN1ObjectIdentifier(this, branchID);
    }

    /**
     * Return  true if this oid is an extension of the passed in branch, stem.
     * @param stem the arc or branch that is a possible parent.
     * @return  true if the branch is on the passed in stem, false otherwise.
     */
    public boolean on(ASN1ObjectIdentifier stem)
    {
        String id = getId(), stemId = stem.getId();
        return id.length() > stemId.length() && id.charAt(stemId.length()) == '.' && id.startsWith(stemId);
    }
}