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package sun.security.provider.certpath;

import java.util.Set;

import java.security.InvalidAlgorithmParameterException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.cert.*;


This class specifies the set of parameters used as input for the Sun
certification path build algorithm. It is identical to PKIXBuilderParameters
with the addition of a buildForward parameter which allows
the caller to specify whether or not the path should be constructed in
the forward direction.
The default for the buildForward parameter is
true, which means that the build algorithm should construct paths
from the target subject back to the trusted anchor.

Author:     Sean Mullan,      Yassir Elley
Since:      1.4
/**
 * This class specifies the set of parameters used as input for the Sun
 * certification path build algorithm. It is identical to PKIXBuilderParameters
 * with the addition of a <code>buildForward</code> parameter which allows
 * the caller to specify whether or not the path should be constructed in
 * the forward direction.
 *
 * The default for the <code>buildForward</code> parameter is
 * true, which means that the build algorithm should construct paths
 * from the target subject back to the trusted anchor.
 *
 * @since       1.4
 * @author      Sean Mullan
 * @author      Yassir Elley
 */
public class SunCertPathBuilderParameters extends PKIXBuilderParameters {

    private boolean buildForward = true;

    
Creates an instance of SunCertPathBuilderParameters with the
specified parameter values.

Params:
  • trustAnchors – a Set of TrustAnchors
  • targetConstraints – a CertSelector specifying the
constraints on the target certificate
Throws:
/**
     * Creates an instance of <code>SunCertPathBuilderParameters</code> with the
     * specified parameter values.
     *
     * @param trustAnchors a <code>Set</code> of <code>TrustAnchor</code>s
     * @param targetConstraints a <code>CertSelector</code> specifying the
     * constraints on the target certificate
     * @throws InvalidAlgorithmParameterException if the specified
     * <code>Set</code> is empty <code>(trustAnchors.isEmpty() == true)</code>
     * @throws NullPointerException if the specified <code>Set</code> is
     * <code>null</code>
     * @throws ClassCastException if any of the elements in the <code>Set</code>
     * are not of type <code>java.security.cert.TrustAnchor</code>
     */
    public SunCertPathBuilderParameters(Set<TrustAnchor> trustAnchors,
        CertSelector targetConstraints) throws InvalidAlgorithmParameterException
    {
        super(trustAnchors, targetConstraints);
        setBuildForward(true);
    }

    
Creates an instance of SunCertPathBuilderParameters that
uses the specified KeyStore to populate the set
of most-trusted CA certificates.

Params:
  • keystore – A keystore from which the set of most-trusted
CA certificates will be populated.
  • targetConstraints – a CertSelector specifying the
constraints on the target certificate
Throws:
/**
     * Creates an instance of <code>SunCertPathBuilderParameters</code> that
     * uses the specified <code>KeyStore</code> to populate the set
     * of most-trusted CA certificates.
     *
     * @param keystore A keystore from which the set of most-trusted
     * CA certificates will be populated.
     * @param targetConstraints a <code>CertSelector</code> specifying the
     * constraints on the target certificate
     * @throws KeyStoreException if the keystore has not been initialized.
     * @throws InvalidAlgorithmParameterException if the keystore does
     * not contain at least one trusted certificate entry
     * @throws NullPointerException if the keystore is <code>null</code>
     */
    public SunCertPathBuilderParameters(KeyStore keystore,
        CertSelector targetConstraints)
        throws KeyStoreException, InvalidAlgorithmParameterException
    {
        super(keystore, targetConstraints);
        setBuildForward(true);
    }

    
Returns the value of the buildForward flag.

Returns:the value of the buildForward flag
/**
     * Returns the value of the buildForward flag.
     *
     * @return the value of the buildForward flag
     */
    public boolean getBuildForward() {
        return this.buildForward;
    }

    
Sets the value of the buildForward flag. If true, paths
are built from the target subject to the trusted anchor.
If false, paths are built from the trusted anchor to the
target subject. The default value if not specified is true.

Params:
  • buildForward – the value of the buildForward flag
/**
     * Sets the value of the buildForward flag. If true, paths
     * are built from the target subject to the trusted anchor.
     * If false, paths are built from the trusted anchor to the
     * target subject. The default value if not specified is true.
     *
     * @param buildForward the value of the buildForward flag
     */
    public void setBuildForward(boolean buildForward) {
        this.buildForward = buildForward;
    }

    
Returns a formatted string describing the parameters.

Returns:a formatted string describing the parameters.
/**
     * Returns a formatted string describing the parameters.
     *
     * @return a formatted string describing the parameters.
     */
    public String toString() {
        StringBuffer sb = new StringBuffer();
        sb.append("[\n");
        sb.append(super.toString());
        sb.append("  Build Forward Flag: " + String.valueOf(buildForward) + "\n");
        sb.append("]\n");
        return sb.toString();
    }
}