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19  package org.apache.maven.plugin.internal;
20  
21  import javax.inject.Inject;
22  import javax.inject.Named;
23  import javax.inject.Singleton;
24  import org.apache.maven.plugin.MavenPluginPrerequisitesChecker;
25  import org.apache.maven.plugin.descriptor.PluginDescriptor;
26  import org.apache.maven.rtinfo.RuntimeInformation;
27  import org.codehaus.plexus.util.StringUtils;
28  import org.slf4j.Logger;
29  import org.slf4j.LoggerFactory;
30  
31  @Named
32  @Singleton
33  public class MavenPluginMavenPrerequisiteChecker implements MavenPluginPrerequisitesChecker {
34      private final Logger logger = LoggerFactory.getLogger(getClass());
35      private final RuntimeInformation runtimeInformation;
36  
37      @Inject
38      public MavenPluginMavenPrerequisiteChecker(RuntimeInformation runtimeInformation) {
39          super();
40          this.runtimeInformation = runtimeInformation;
41      }
42  
43      @Override
44      public void accept(PluginDescriptor pluginDescriptor) {
45          String requiredMavenVersion = pluginDescriptor.getRequiredMavenVersion();
46          if (StringUtils.isNotBlank(requiredMavenVersion)) {
47              boolean isRequirementMet = false;
48              try {
49                  isRequirementMet = runtimeInformation.isMavenVersion(requiredMavenVersion);
50              } catch (IllegalArgumentException e) {
51                  logger.warn(
52                          "Could not verify plugin's Maven prerequisite as an invalid version is given in "
53                                  + requiredMavenVersion,
54                          e);
55                  return;
56              }
57              if (!isRequirementMet) {
58                  throw new IllegalStateException("Required Maven version " + requiredMavenVersion
59                          + " is not met by current version " + runtimeInformation.getMavenVersion());
60              }
61          }
62      }
63  }