text: /*
   * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  package jdk.vm.ci.meta;
  
  import java.util.Objects;
  
  /**
   * Represents an exception handler within the bytecodes.
   */
  public final class ExceptionHandler {
  
      private final int startBCI;
      private final int endBCI;
      private final int handlerBCI;
      private final int catchTypeCPI;
      private final JavaType catchType;
  
      /**
       * Creates a new exception handler with the specified ranges.
       *
       * @param startBCI the start index of the protected range
       * @param endBCI the end index of the protected range
       * @param catchBCI the index of the handler
       * @param catchTypeCPI the index of the throwable class in the constant pool
       * @param catchType the type caught by this exception handler
       */
      public ExceptionHandler(int startBCI, int endBCI, int catchBCI, int catchTypeCPI, JavaType catchType) {
          this.startBCI = startBCI;
          this.endBCI = endBCI;
          this.handlerBCI = catchBCI;
          this.catchTypeCPI = catchTypeCPI;
          this.catchType = catchType;
      }
  
      /**
       * Returns the start bytecode index of the protected range of this handler.
       */
      public int getStartBCI() {
          return startBCI;
      }
  
      /**
       * Returns the end bytecode index of the protected range of this handler.
       */
      public int getEndBCI() {
          return endBCI;
      }
  
      /**
       * Returns the bytecode index of the handler block of this handler.
       */
      public int getHandlerBCI() {
          return handlerBCI;
      }
  
      /**
       * Returns the index into the constant pool representing the type of exception caught by this
       * handler.
       */
      public int catchTypeCPI() {
          return catchTypeCPI;
      }
  
      /**
       * Checks whether this handler catches all exceptions.
       *
       * @return {@code true} if this handler catches all exceptions
       */
      public boolean isCatchAll() {
          return catchTypeCPI == 0;
      }
  
      /**
       * Returns the type of exception caught by this exception handler.
       */
      public JavaType getCatchType() {
          return catchType;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (!(obj instanceof ExceptionHandler)) {
              return false;
          }
          ExceptionHandler that = (ExceptionHandler) obj;
          if (this.startBCI != that.startBCI || this.endBCI != that.endBCI || this.handlerBCI != that.handlerBCI || this.catchTypeCPI != that.catchTypeCPI) {
              return false;
          }
          return Objects.equals(this.catchType, that.catchType);
      }
  
      @Override
      public String toString() {
          return "ExceptionHandler<startBCI=" + startBCI + ", endBCI=" + endBCI + ", handlerBCI=" + handlerBCI + ", catchTypeCPI=" + catchTypeCPI + ", catchType=" + catchType + ">";
      }
  
      @Override
      public int hashCode() {
          return catchTypeCPI ^ endBCI ^ handlerBCI;
      }
  }
  