| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.maven.plugins.artifact.buildinfo; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.maven.shared.utils.StringUtils; |
| import org.apache.maven.shared.utils.cli.CommandLineException; |
| import org.apache.maven.shared.utils.cli.CommandLineUtils; |
| import org.apache.maven.shared.utils.cli.Commandline; |
| import org.apache.maven.shared.utils.cli.StreamConsumer; |
| import org.apache.maven.toolchain.Toolchain; |
| |
| /** |
| * A helper to get JDK version from a JDK toolchain. |
| */ |
| class JdkToolchainUtil { |
| static String getJavaVersion(Toolchain toolchain) { |
| String version = "unknown"; |
| String java = toolchain.findTool("java"); |
| if (java != null) { |
| try { |
| Commandline cl = new Commandline(java + " -version"); |
| LineConsumer out = new LineConsumer(); |
| LineConsumer err = new LineConsumer(); |
| CommandLineUtils.executeCommandLine(cl, out, err); |
| version = StringUtils.join(err.getLines().iterator(), ":"); |
| if (version == null) { |
| version = "unable to detect..."; |
| } |
| } catch (CommandLineException cle) { |
| version = cle.toString(); |
| } |
| } |
| return version; |
| } |
| |
| private static class LineConsumer implements StreamConsumer { |
| private List<String> lines = new ArrayList<>(); |
| |
| @Override |
| public void consumeLine(String line) throws IOException { |
| lines.add(line); |
| } |
| |
| List<String> getLines() { |
| return lines; |
| } |
| } |
| } |