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package org.spongycastle.jce.cert;
import java.util.ArrayList;
import java.util.Collection;
/**
* Parameters used as input for the Collection <code>CertStore</code>
* algorithm.<br />
* <br />
* This class is used to provide necessary configuration parameters
* to implementations of the Collection <code>CertStore</code>
* algorithm. The only parameter included in this class is the
* <code>Collection</code> from which the <code>CertStore</code> will
* retrieve certificates and CRLs.<br />
* <br />
* <b>Concurrent Access</b><br />
* <br />
* Unless otherwise specified, the methods defined in this class are not
* thread-safe. Multiple threads that need to access a single
* object concurrently should synchronize amongst themselves and
* provide the necessary locking. Multiple threads each manipulating
* separate objects need not synchronize.
*
* @see java.util.Collection
* @see CertStore
**/
public class CollectionCertStoreParameters implements CertStoreParameters
{
private Collection collection;
/**
* Creates an instance of <code>CollectionCertStoreParameters</code> which
* will allow certificates and CRLs to be retrieved from the specified
* <code>Collection</code>. If the specified <code>Collection</code>
* contains an object that is not a <code>Certificate</code> or
* <code>CRL</code>, that object will be ignored by the Collection
* <code>CertStore</code>.<br />
* <br />
* The <code>Collection</code> is <b>not</b> copied. Instead, a reference
* is used. This allows the caller to subsequently add or remove
* <code>Certificates</code> or <code>CRL</code>s from the
* <code>Collection</code>, thus changing the set of
* <code>Certificates</code> or <code>CRL</code>s available to the
* Collection <code>CertStore</code>. The Collection
* <code>CertStore</code> will not modify the contents of the
* <code>Collection</code>.<br />
* <br />
* If the <code>Collection</code> will be modified by one thread while
* another thread is calling a method of a Collection <code>CertStore</code>
* that has been initialized with this <code>Collection</code>, the
* <code>Collection</code> must have fail-fast iterators.
*
* @param collection
* a <code>Collection</code> of <code>Certificate</code>s
* and <code>CRL</code>s
*
* @exception NullPointerException
* if <code>collection</code> is <code>null</code>
*/
public CollectionCertStoreParameters(Collection collection)
{
if (collection == null)
{
throw new NullPointerException("collection must be non-null");
}
this.collection = collection;
}
/**
* Creates an instance of <code>CollectionCertStoreParameters</code> with
* the an empty Collection.
*/
public CollectionCertStoreParameters()
{
collection = new ArrayList();
}
/**
* Returns the <code>Collection</code> from which <code>Certificate</code>s
* and <code>CRL</code>s are retrieved. This is <b>not</b> a copy of the
* <code>Collection</code>, it is a reference. This allows the caller to
* subsequently add or remove <code>Certificates</code> or
* <code>CRL</code>s from the <code>Collection</code>.
*
* @return the <code>Collection</code> (never null)
*/
public Collection getCollection()
{
return collection;
}
/**
* Returns a copy of this object. Note that only a reference to the
* <code>Collection</code> is copied, and not the contents.
*
* @return the copy
*/
public Object clone()
{
try
{
return super.clone();
}
catch (CloneNotSupportedException e)
{
/* Cannot happen */
throw new InternalError(e.toString());
}
}
/**
* Returns a formatted string describing the parameters.
*
* @return a formatted string describing the parameters
*/
public String toString()
{
StringBuffer s = new StringBuffer();
s.append("CollectionCertStoreParameters: [\n collections:\n");
s.append(getCollection());
s.append("\n]");
return s.toString();
}
}
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