org.apache.ibatis.migration.commands.InfoCommand Maven / Gradle / Ivy

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package org.apache.ibatis.migration.commands;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Properties;

public final class InfoCommand implements Command {
  private final PrintStream out;

  public InfoCommand(PrintStream out) {
    this.out = out;
  }

  public void execute(String... params) {
    Properties properties = new Properties();
    InputStream input = getClass().getClassLoader().getResourceAsStream(
        "META-INF/maven/org.mybatis/mybatis-migrations/pom.properties");

    if (input != null) {
      try {
        properties.load(input);
      } catch (IOException e) {
        // ignore, just don't load the properties
      } finally {
        try {
          input.close();
        } catch (IOException e) {
          // close quietly
        }
      }
    }

    out.printf("%s %s (%s)%n",
        properties.getProperty("name"),
        properties.getProperty("version"),
        properties.getProperty("build"));
    out.printf("Java version: %s, vendor: %s%n",
        System.getProperty("java.version"),
        System.getProperty("java.vendor"));
    out.printf("Java home: %s%n", System.getProperty("java.home"));
    out.printf("Default locale: %s_%s, platform encoding: %s%n",
        System.getProperty("user.language"),
        System.getProperty("user.country"),
        System.getProperty("sun.jnu.encoding"));
    out.printf("OS name: \"%s\", version: \"%s\", arch: \"%s\", family: \"%s\"%n",
        System.getProperty("os.name"),
        System.getProperty("os.version"),
        System.getProperty("os.arch"),
        getOsFamily());
  }

  private static final String getOsFamily() {
    String osName = System.getProperty("os.name").toLowerCase();
    String pathSep = System.getProperty("path.separator");

    if (osName.indexOf("windows") != -1) {
      return "windows";
    } else if (osName.indexOf("os/2") != -1) {
      return "os/2";
    } else if (osName.indexOf("z/os") != -1 || osName.indexOf("os/390") != -1) {
      return "z/os";
    } else if (osName.indexOf("os/400") != -1) {
      return "os/400";
    } else if (pathSep.equals(";")) {
      return "dos";
    } else if (osName.indexOf("mac") != -1) {
      if (osName.endsWith("x")) {
        return "mac"; // MACOSX
      }
      return "unix";
    } else if (osName.indexOf("nonstop_kernel") != -1) {
      return "tandem";
    } else if (osName.indexOf("openvms") != -1) {
      return "openvms";
    } else if (pathSep.equals(":")) {
      return "unix";
    }

    return "undefined";
  }

}