com.nimbusds.jose.crypto.BaseJWSProvider Maven / Gradle / Ivy

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package com.nimbusds.jose.crypto;


import java.security.Provider;
import java.util.Collections;
import java.util.Set;

import com.nimbusds.jose.JWSAlgorithm;
import com.nimbusds.jose.JWSAlgorithmProvider;


/**
 * The base abstract class for JSON Web Signature (JWS) signers and verifiers.
 *
 * @author Vladimir Dzhuvinov
 * @version $version$ (2014-01-28)
 */
abstract class BaseJWSProvider implements JWSAlgorithmProvider {


	/**
	 * The supported algorithms.
	 */
	private final Set algs;


	/**
	 * The underlying cryptographic provider, {@code null} if not specified
	 * (implies default one).
	 */
	protected Provider provider = null;


	/**
	 * Creates a new base JWS provider.
	 *
	 * @param algs The supported JWS algorithms. Must not be {@code null}.
	 */
	public BaseJWSProvider(final Set algs) {

		if (algs == null) {
			
			throw new IllegalArgumentException("The supported JWS algorithm set must not be null");
		}

		this.algs = Collections.unmodifiableSet(algs);
	}


	@Override
	public Set supportedAlgorithms() {

		return algs;
	}


	@Override
	public void setProvider(final Provider provider) {

		this.provider = provider;
	}
}