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XMLTooling-J is a low-level library that may be used to construct libraries that allow developers to work with XML in a Java beans manner.
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/*
 * Licensed to the University Corporation for Advanced Internet Development, 
 * Inc. (UCAID) under one or more contributor license agreements.  See the 
 * NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The UCAID 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 org.opensaml.xml.security.x509;

import java.security.PublicKey;
import java.security.cert.X509CRL;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

import javax.crypto.SecretKey;

import org.opensaml.xml.security.credential.BasicCredential;
import org.opensaml.xml.security.credential.Credential;

/**
 * A basic implementation of {@link X509Credential}.
 */
public class BasicX509Credential extends BasicCredential implements X509Credential {

    /** Entity certificate. */
    private X509Certificate entityCert;

    /** Entity certificate chain, must include entity certificate. */
    private Collection entityCertChain;

    /** CRLs for this credential. */
    private Collection crls;

    /** {@inheritDoc} */
    public Class getCredentialType() {
        return X509Credential.class;
    }

    /** {@inheritDoc} */
    public Collection getCRLs() {
        return crls;
    }

    /**
     * Sets the CRLs for this credential.
     * 
     * @param newCRLs CRLs for this credential
     */
    public void setCRLs(Collection newCRLs) {
        crls = newCRLs;
    }

    /** {@inheritDoc} */
    public X509Certificate getEntityCertificate() {
        return entityCert;
    }

    /**
     * Sets the entity certificate for this credential.
     * 
     * @param cert entity certificate for this credential
     */
    public void setEntityCertificate(X509Certificate cert) {
        entityCert = cert;
        if (cert != null) {
            setPublicKey(cert.getPublicKey());
        } else {
            setPublicKey(null);
        }
    }

    /** {@inheritDoc} */
    public Collection getEntityCertificateChain() {
        if (entityCertChain == null && entityCert != null) {
            HashSet constructedChain = new HashSet(5);
            constructedChain.add(entityCert);
            return constructedChain;
        }

        return entityCertChain;
    }

    /**
     * Sets the entity certificate chain for this credential. This MUST include the entity
     * certificate.
     * 
     * @param certs ntity certificate chain for this credential
     */
    public void setEntityCertificateChain(Collection certs) {
        entityCertChain = new ArrayList(certs);
    }

    /** {@inheritDoc} */
    public void setPublicKey(PublicKey key) {
        if (entityCert != null) {
            if (! entityCert.getPublicKey().equals(key)) {
                throw new IllegalArgumentException("X509Credential already contains a certificate " 
                        + "with a different public key");
            }
        }
        super.setPublicKey(key);
    }

    /** {@inheritDoc} */
    public void setSecretKey(SecretKey key) {
        if (key != null) {
            throw new UnsupportedOperationException("Secret (symmetric) key may not be set " 
                    + "on an X509Credential instance");
        }
    }

    /** {@inheritDoc} */
    public SecretKey getSecretKey() {
        return null;
    }
    
}