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JwtPlaceholder.java
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JwtPlaceholder.java
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/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.gateway.service.security.authentication.jwt;
import static org.eclipse.ditto.base.model.common.ConditionChecker.argumentNotEmpty;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import org.eclipse.ditto.json.JsonValue;
import org.eclipse.ditto.jwt.model.JsonWebToken;
import org.eclipse.ditto.placeholders.Placeholder;
/**
* The placeholder that replaces {@code jwt:<body-claim>}.
*/
public final class JwtPlaceholder implements Placeholder<JsonWebToken> {
private static final JwtPlaceholder INSTANCE = new JwtPlaceholder();
/**
* JWT Placeholder prefix.
*/
public static final String PREFIX = "jwt";
/**
* Get the instance of {@code JwtPlaceholder}.
*
* @return the instance.
*/
public static JwtPlaceholder getInstance() {
return INSTANCE;
}
@Override
public String getPrefix() {
return PREFIX;
}
@Override
public List<String> getSupportedNames() {
return List.of();
}
@Override
public boolean supports(final String name) {
return true;
}
@Override
public List<String> resolveValues(final JsonWebToken jwt, final String placeholder) {
argumentNotEmpty(placeholder, "placeholder");
checkNotNull(jwt, "jwt");
final Optional<JsonValue> value = jwt.getBody().getValue(placeholder);
return value.filter(JsonValue::isArray)
.map(JsonValue::asArray)
.map(array -> array.stream()
.map(JsonValue::formatAsString)
.toList())
.or(() -> value.map(JsonValue::formatAsString)
.map(Collections::singletonList))
.orElseGet(Collections::emptyList);
}
}