001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.transport.jdk;
020
021import javax.inject.Inject;
022import javax.inject.Named;
023
024import org.eclipse.aether.RepositorySystemSession;
025import org.eclipse.aether.repository.RemoteRepository;
026import org.eclipse.aether.spi.connector.transport.http.ChecksumExtractor;
027import org.eclipse.aether.spi.connector.transport.http.HttpTransporter;
028import org.eclipse.aether.spi.connector.transport.http.HttpTransporterFactory;
029import org.eclipse.aether.spi.io.PathProcessor;
030import org.eclipse.aether.transfer.NoTransporterException;
031
032import static java.util.Objects.requireNonNull;
033
034/**
035 * JDK Transport factory: on Java11+ it works.
036 *
037 * @since 2.0.0
038 */
039@Named(JdkTransporterFactory.NAME)
040public final class JdkTransporterFactory implements HttpTransporterFactory {
041    public static final String NAME = "jdk";
042
043    private float priority = 10.0f;
044
045    private final ChecksumExtractor checksumExtractor;
046
047    private final PathProcessor pathProcessor;
048
049    @Inject
050    public JdkTransporterFactory(ChecksumExtractor checksumExtractor, PathProcessor pathProcessor) {
051        this.checksumExtractor = requireNonNull(checksumExtractor, "checksumExtractor");
052        this.pathProcessor = requireNonNull(pathProcessor, "pathProcessor");
053    }
054
055    @Override
056    public float getPriority() {
057        return priority;
058    }
059
060    public JdkTransporterFactory setPriority(float priority) {
061        this.priority = priority;
062        return this;
063    }
064
065    @Override
066    public HttpTransporter newInstance(RepositorySystemSession session, RemoteRepository repository)
067            throws NoTransporterException {
068        requireNonNull(session, "session cannot be null");
069        requireNonNull(repository, "repository cannot be null");
070
071        if (!"http".equalsIgnoreCase(repository.getProtocol()) && !"https".equalsIgnoreCase(repository.getProtocol())) {
072            throw new NoTransporterException(repository, "Only HTTP/HTTPS is supported");
073        }
074
075        return new JdkTransporter(session, repository, javaVersion(), checksumExtractor, pathProcessor);
076    }
077
078    private static int javaVersion() {
079        try {
080            final String version = System.getProperty("java.version", "11" /* default must pass */);
081            final int dot = version.indexOf('.');
082            final int hyphen = version.indexOf('-');
083            final int sep = (dot > 0 && dot < hyphen || hyphen < 0) ? dot : hyphen;
084            return Integer.parseInt(sep > 0 ? version.substring(0, sep) : version);
085        } catch (final NumberFormatException nfe) {
086            return 11; // cannot be a pre-java 11 version so let it pass
087        }
088    }
089}