io.gravitee.policy.v3.jwt.resolver.UserDefinedSignatureKeyResolver Maven / Gradle / Ivy

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/*
 * Copyright © 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed 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 io.gravitee.policy.v3.jwt.resolver;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class UserDefinedSignatureKeyResolver implements SignatureKeyResolver {

    private final String givenKey;

    public UserDefinedSignatureKeyResolver(String givenKey) {
        this.givenKey = givenKey;
    }

    @Override
    public String resolve() {
        if (givenKey == null || givenKey.trim().isEmpty()) {
            throw new IllegalArgumentException("No specified given key while expecting it due to policy settings.");
        }

        return givenKey;
    }
}