程序包 cn.taketoday.bytecode

类 Handler

java.lang.Object
cn.taketoday.bytecode.Handler
final class Handler extends Object
Information about an exception handler. Corresponds to an element of the exception_table array of a Code attribute, as defined in the Java Virtual Machine Specification (JVMS). Handler instances can be chained together, with their nextHandler field, to describe a full JVMS exception_table array.
作者:
Eric Bruneton
另请参阅:

  • 字段概要

    字段
    修饰符和类型
    字段
    说明
    final int
    catchType
    The catch_type field of this JVMS exception_table entry.
    final String
    catchTypeDescriptor
    The internal name of the type of exceptions handled by this handler, or null to catch any exceptions.
    final Label
    endPc
    The end_pc field of this JVMS exception_table entry.
    final Label
    handlerPc
    The handler_pc field of this JVMS exception_table entry.
    Handler
    nextHandler
    The next exception handler.
    final Label
    startPc
    The start_pc field of this JVMS exception_table entry.

  • 构造器概要

    构造器
    构造器
    说明
    Handler(Handler handler, Label startPc, Label endPc)
    Constructs a new Handler from the given one, with a different scope.
    Handler(Label startPc, Label endPc, Label handlerPc, int catchType, String catchTypeDescriptor)
    Constructs a new Handler.

  • 方法概要

    修饰符和类型
    方法
    说明
    (专用程序包) static int
    getExceptionTableLength(Handler firstHandler)
    Returns the number of elements of the Handler list that begins with the given element.
    (专用程序包) static int
    getExceptionTableSize(Handler firstHandler)
    Returns the size in bytes of the JVMS exception_table corresponding to the Handler list that begins with the given element.
    (专用程序包) static void
    putExceptionTable(Handler firstHandler, ByteVector output)
    Puts the JVMS exception_table corresponding to the Handler list that begins with the given element.
    (专用程序包) static Handler
    removeRange(Handler firstHandler, Label start, Label end)
    Removes the range between start and end from the Handler list that begins with the given element.

    从类继承的方法 java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • 字段详细资料

    • startPc

      public final Label startPc
      The start_pc field of this JVMS exception_table entry. Corresponds to the beginning of the exception handler's scope (inclusive).

    • endPc

      public final Label endPc
      The end_pc field of this JVMS exception_table entry. Corresponds to the end of the exception handler's scope (exclusive).

    • handlerPc

      public final Label handlerPc
      The handler_pc field of this JVMS exception_table entry. Corresponding to the beginning of the exception handler's code.

    • catchType

      public final int catchType
      The catch_type field of this JVMS exception_table entry. This is the constant pool index of the internal name of the type of exceptions handled by this handler, or 0 to catch any exceptions.

    • catchTypeDescriptor

      public final String catchTypeDescriptor
      The internal name of the type of exceptions handled by this handler, or null to catch any exceptions.

    • nextHandler

      public Handler nextHandler
      The next exception handler.

  • 构造器详细资料

    • Handler

      Handler(Label startPc, Label endPc, Label handlerPc, int catchType, String catchTypeDescriptor)
      Constructs a new Handler.
      参数:
      startPc - the start_pc field of this JVMS exception_table entry.
      endPc - the end_pc field of this JVMS exception_table entry.
      handlerPc - the handler_pc field of this JVMS exception_table entry.
      catchType - The catch_type field of this JVMS exception_table entry.
      catchTypeDescriptor - The internal name of the type of exceptions handled by this handler, or null to catch any exceptions.

    • Handler

      Handler(Handler handler, Label startPc, Label endPc)
      Constructs a new Handler from the given one, with a different scope.
      参数:
      handler - an existing Handler.
      startPc - the start_pc field of this JVMS exception_table entry.
      endPc - the end_pc field of this JVMS exception_table entry.

  • 方法详细资料

    • removeRange

      static Handler removeRange(Handler firstHandler, Label start, Label end)
      Removes the range between start and end from the Handler list that begins with the given element.
      参数:
      firstHandler - the beginning of a Handler list. May be null.
      start - the start of the range to be removed.
      end - the end of the range to be removed. Maybe null.
      返回:
      the exception handler list with the start-end range removed.

    • getExceptionTableLength

      static int getExceptionTableLength(Handler firstHandler)
      Returns the number of elements of the Handler list that begins with the given element.
      参数:
      firstHandler - the beginning of a Handler list. May be null.
      返回:
      the number of elements of the Handler list that begins with 'handler'.

    • getExceptionTableSize

      static int getExceptionTableSize(Handler firstHandler)
      Returns the size in bytes of the JVMS exception_table corresponding to the Handler list that begins with the given element. This includes the exception_table_length field.
      参数:
      firstHandler - the beginning of a Handler list. May be null.
      返回:
      the size in bytes of the exception_table_length and exception_table structures.

    • putExceptionTable

      static void putExceptionTable(Handler firstHandler, ByteVector output)
      Puts the JVMS exception_table corresponding to the Handler list that begins with the given element. This includes the exception_table_length field.
      参数:
      firstHandler - the beginning of a Handler list. May be null.
      output - where the exception_table_length and exception_table structures must be put.