46 import java.util.Map;
  47 import java.util.Set;
  48 import java.util.function.Supplier;
  49 
  50 import jdk.internal.access.JavaLangModuleAccess;
  51 import jdk.internal.access.SharedSecrets;
  52 
  53 import static jdk.internal.module.ClassFileConstants.*;
  54 
  55 
  56 /**
  57  * Read module information from a {@code module-info} class file.
  58  *
  59  * @implNote The rationale for the hand-coded reader is startup performance
  60  * and fine control over the throwing of InvalidModuleDescriptorException.
  61  */
  62 
  63 public final class ModuleInfo {
  64 
  65     private final int JAVA_MIN_SUPPORTED_VERSION = 53;
  66     private final int JAVA_MAX_SUPPORTED_VERSION = 56;
  67 
  68     private static final JavaLangModuleAccess JLMA
  69         = SharedSecrets.getJavaLangModuleAccess();
  70 
  71     // supplies the set of packages when ModulePackages attribute not present
  72     private final Supplier<Set<String>> packageFinder;
  73 
  74     // indicates if the ModuleHashes attribute should be parsed
  75     private final boolean parseHashes;
  76 
  77     private ModuleInfo(Supplier<Set<String>> pf, boolean ph) {
  78         packageFinder = pf;
  79         parseHashes = ph;
  80     }
  81 
  82     private ModuleInfo(Supplier<Set<String>> pf) {
  83         this(pf, true);
  84     }
  85 
  86     /**

  46 import java.util.Map;
  47 import java.util.Set;
  48 import java.util.function.Supplier;
  49 
  50 import jdk.internal.access.JavaLangModuleAccess;
  51 import jdk.internal.access.SharedSecrets;
  52 
  53 import static jdk.internal.module.ClassFileConstants.*;
  54 
  55 
  56 /**
  57  * Read module information from a {@code module-info} class file.
  58  *
  59  * @implNote The rationale for the hand-coded reader is startup performance
  60  * and fine control over the throwing of InvalidModuleDescriptorException.
  61  */
  62 
  63 public final class ModuleInfo {
  64 
  65     private final int JAVA_MIN_SUPPORTED_VERSION = 53;
  66     private final int JAVA_MAX_SUPPORTED_VERSION = 57;
  67 
  68     private static final JavaLangModuleAccess JLMA
  69         = SharedSecrets.getJavaLangModuleAccess();
  70 
  71     // supplies the set of packages when ModulePackages attribute not present
  72     private final Supplier<Set<String>> packageFinder;
  73 
  74     // indicates if the ModuleHashes attribute should be parsed
  75     private final boolean parseHashes;
  76 
  77     private ModuleInfo(Supplier<Set<String>> pf, boolean ph) {
  78         packageFinder = pf;
  79         parseHashes = ph;
  80     }
  81 
  82     private ModuleInfo(Supplier<Set<String>> pf) {
  83         this(pf, true);
  84     }
  85 
  86     /**