org.cryptoworkshop.ximix.common.asn1.message.NodeInfo.java Source code

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Here is the source code for org.cryptoworkshop.ximix.common.asn1.message.NodeInfo.java

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/**
 * Copyright 2013 Crypto Workshop Pty Ltd
 *
 * Licensed 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 org.cryptoworkshop.ximix.common.asn1.message;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERSet;
import org.bouncycastle.asn1.DERUTF8String;

/**
 * Carrier class for information related to a node - its name and capabilities.
 */
public class NodeInfo extends ASN1Object {
    private final String name;
    private final CapabilityMessage[] capabilities;

    /**
     * Base constructor.
     *
     * @param name the name of the node associated with this info message.
     * @param capabilities an array of CapabilityMessage giving the capabilities of the node.
     */
    public NodeInfo(String name, CapabilityMessage[] capabilities) {
        this.name = name;
        this.capabilities = capabilities;
    }

    private NodeInfo(ASN1Sequence s) {
        this.name = DERUTF8String.getInstance(s.getObjectAt(0)).getString();
        this.capabilities = convertSet(ASN1Set.getInstance(s.getObjectAt(1)));
    }

    @Override
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(new DERUTF8String(name));
        v.add(new DERSet(capabilities));

        return new DERSequence(v);
    }

    private CapabilityMessage[] convertSet(ASN1Set strings) {
        CapabilityMessage[] rv = new CapabilityMessage[strings.size()];

        for (int i = 0; i != rv.length; i++) {
            rv[i] = CapabilityMessage.getInstance(strings.getObjectAt(i));
        }

        return rv;
    }

    public static NodeInfo getInstance(Object o) {
        if (o instanceof NodeInfo) {
            return (NodeInfo) o;
        } else if (o != null) {
            return new NodeInfo(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public String getName() {
        return name;
    }

    public CapabilityMessage[] getCapabilities() {
        return capabilities.clone();
    }
}