src/java.base/share/classes/java/net/URI.java

rev 15833 : 8168073: Speed up URI creation during module bootstrap
Reviewed-by: alanb, mchung, psandoz

*** 35,44 ****
--- 35,47 ----
  import java.nio.charset.CharsetDecoder;
  import java.nio.charset.CoderResult;
  import java.nio.charset.CodingErrorAction;
  import java.nio.charset.CharacterCodingException;
  import java.text.Normalizer;
+ import jdk.internal.loader.URLClassPath;
+ import jdk.internal.misc.JavaNetUriAccess;
+ import jdk.internal.misc.SharedSecrets;
  import sun.nio.cs.ThreadLocalCoders;
  
  import java.lang.Character;             // for javadoc
  import java.lang.NullPointerException;  // for javadoc
  
*** 818,827 ****
--- 821,849 ----
                              null, null, fragment))
              .parse(false);
      }
  
      /**
+      * Constructs a simple URI consisting of only a scheme and a pre-validated
+      * path. Provides a fast-path for some internal cases.
+      */
+     URI(String scheme, String path) {
+         assert validSchemeAndPath(scheme, path);
+         this.scheme = scheme;
+         this.path = path;
+     }
+ 
+     private static boolean validSchemeAndPath(String scheme, String path) {
+         try {
+             URI u = new URI(scheme + ":" + path);
+             return scheme.equals(u.scheme) && path.equals(u.path);
+         } catch (URISyntaxException e) {
+             return false;
+         }
+     }
+ 
+     /**
       * Creates a URI by parsing the given string.
       *
       * <p> This convenience factory method works as if by invoking the {@link
       * #URI(String)} constructor; any {@link URISyntaxException} thrown by the
       * constructor is caught and wrapped in a new {@link
*** 3569,3575 ****
  
              return p;
          }
  
      }
! 
  }
--- 3591,3605 ----
  
              return p;
          }
  
      }
!     static {
!         SharedSecrets.setJavaNetUriAccess(
!             new JavaNetUriAccess() {
!                 public URI create(String scheme, String path) {
!                     return new URI(scheme, path);
!                 }
!             }
!         );
!     }
  }