/*
 * Copyright 2017-2020 original authors
 *
 * 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
 *
 * https://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.
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package io.micronaut.web.router.version.resolution;

import io.micronaut.context.annotation.Requires;
import io.micronaut.http.HttpRequest;
import io.micronaut.web.router.version.RoutesVersioningConfiguration;

import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.List;
import java.util.Objects;
import java.util.Optional;

A RequestVersionResolver responsible for extracting version from HttpParameters.
Author:Bogdan Oros
Since:1.1.0
/** * A {@link RequestVersionResolver} responsible for extracting version from {@link io.micronaut.http.HttpParameters}. * * @author Bogdan Oros * @since 1.1.0 */
@Singleton @Requires(beans = {RoutesVersioningConfiguration.class, ParameterVersionResolverConfiguration.class}) public class ParameterVersionResolver implements RequestVersionResolver { private final List<String> parameterNames;
Creates a RequestVersionResolver to extract version from request parameter.
Params:
  • configuration – A configuration to pick correct request parameter names.
/** * Creates a {@link RequestVersionResolver} to extract version from request parameter. * * @param configuration A configuration to pick correct request parameter names. */
@Inject public ParameterVersionResolver(ParameterVersionResolverConfiguration configuration) { this.parameterNames = configuration.getNames(); } @Override public Optional<String> resolve(HttpRequest<?> request) { return parameterNames.stream() .map(name -> request.getParameters().get(name)) .filter(Objects::nonNull) .findFirst(); } }