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The Bouncy Castle Java APIs for the OpenPGP Protocol. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.openpgp;

import java.util.Iterator;

import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Iterable;

/**
 * Holder for a list of PGPOnePassSignatures
 */
public class PGPOnePassSignatureList
    implements Iterable
{
    PGPOnePassSignature[]    sigs;
    
    public PGPOnePassSignatureList(
        PGPOnePassSignature[]    sigs)
    {
        this.sigs = new PGPOnePassSignature[sigs.length];
        
        System.arraycopy(sigs, 0, this.sigs, 0, sigs.length);
    }
    
    public PGPOnePassSignatureList(
        PGPOnePassSignature    sig)
    {
        this.sigs = new PGPOnePassSignature[1];
        this.sigs[0] = sig;
    }
    
    public PGPOnePassSignature get(
        int    index)
    {
        return sigs[index];
    }
    
    public int size()
    {
        return sigs.length;
    }
    
    public boolean isEmpty()
    {
        return (sigs.length == 0);
    }

    /**
     * Support method for Iterable where available.
     */
    public Iterator iterator()
    {
        return new Arrays.Iterator(sigs);
    }
}