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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 FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.openpgp;

import java.util.Iterator;

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

/**
 * A list of PGP signatures - normally in the signature block after literal data.
 */
public class PGPSignatureList
    implements Iterable
{
    PGPSignature[]    sigs;
    
    public PGPSignatureList(
        PGPSignature[]    sigs)
    {
        this.sigs = new PGPSignature[sigs.length];
        
        System.arraycopy(sigs, 0, this.sigs, 0, sigs.length);
    }
    
    public PGPSignatureList(
        PGPSignature    sig)
    {
        this.sigs = new PGPSignature[1];
        this.sigs[0] = sig;
    }
    
    public PGPSignature 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);
    }
}