src/java.base/share/classes/jdk/internal/org/objectweb/asm/Attribute.java

rev 50604 : imported patch jep181-rev1

*** 56,65 ****
--- 56,67 ----
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  package jdk.internal.org.objectweb.asm;
  
+ import java.util.Arrays;
+ 
  /**
   * A non standard class, field, method or code attribute.
   *
   * @author Eric Bruneton
   * @author Eugene Kuleshov
*** 279,284 ****
--- 281,354 ----
              out.putShort(cw.newUTF8(attr.type)).putInt(b.length);
              out.putByteArray(b.data, 0, b.length);
              attr = attr.next;
          }
      }
+ 
+     //The stuff below is temporary - once proper support for nestmate attribute has been added, it can be safely removed.
+     //see also changes in ClassReader.accept.
+ 
+     public static class NestMembers extends Attribute {
+         public NestMembers() {
+             super("NestMembers");
+         }
+ 
+         byte[] bytes;
+         String[] classes;
+ 
+         @Override
+         protected Attribute read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) {
+             int offset = off;
+             NestMembers a = new NestMembers();
+             int size = cr.readShort(off);
+             a.classes = new String[size];
+             off += 2;
+             for (int i = 0; i < size ; i++) {
+                 a.classes[i] = cr.readClass(off, buf);
+                 off += 2;
+             }
+             a.bytes = Arrays.copyOfRange(cr.b, offset, offset + len);
+             return a;
+         }
+ 
+         @Override
+         protected ByteVector write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals) {
+             ByteVector v = new ByteVector(bytes.length);
+             v.putShort(classes.length);
+             for (String s : classes) {
+                 v.putShort(cw.newClass(s));
+             }
+             return v;
+         }
+     }
+ 
+     public static class NestHost extends Attribute {
+ 
+         byte[] bytes;
+         String clazz;
+ 
+         public NestHost() {
+             super("NestHost");
+         }
+ 
+         @Override
+         protected Attribute read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) {
+             int offset = off;
+             NestHost a = new NestHost();
+             a.clazz = cr.readClass(off, buf);
+             a.bytes = Arrays.copyOfRange(cr.b, offset, offset + len);
+             return a;
+         }
+ 
+         @Override
+         protected ByteVector write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals) {
+             ByteVector v = new ByteVector(bytes.length);
+             v.putShort(cw.newClass(clazz));
+             return v;
+         }
+     }
+ 
+     static final Attribute[] DEFAULT_ATTRIBUTE_PROTOS = new Attribute[] {
+         new NestMembers(),
+         new NestHost()
+     };
  }