package org.aspectj.apache.bcel.classfile;

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import  org.aspectj.apache.bcel.Constants;
import  java.io.*;

This class represents an entry in the exception table of the Code
attribute and is used only there. It contains a range in which a
particular exception handler is active.
Author:
 M. Dahm
See Also:
Code
Version:
$Id: CodeException.java,v 1.3 2008/05/28 23:53:02 aclement Exp $/**
 * This class represents an entry in the exception table of the <em>Code</em>
 * attribute and is used only there. It contains a range in which a
 * particular exception handler is active.
 *
 * @version $Id: CodeException.java,v 1.3 2008/05/28 23:53:02 aclement Exp $
 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 * @see     Code
 */
public final class CodeException implements Cloneable, Constants, Node, Serializable {
  private int start_pc;   // Range in the code the exception handler is
  private int end_pc;     // active. start_pc is inclusive, end_pc exclusive
  private int handler_pc; /* Starting address of exception handler, i.e.,
			               * an offset from start of code.
			               */
  private int catch_type; /* If this is zero the handler catches any
			   * exception, otherwise it points to the
			   * exception class which is to be caught.
			   */

  public CodeException(CodeException c) {
    this(c.getStartPC(), c.getEndPC(), c.getHandlerPC(), c.getCatchType());
  }

  CodeException(DataInputStream file) throws IOException {
    start_pc   = file.readUnsignedShort();
    end_pc     = file.readUnsignedShort();
    handler_pc = file.readUnsignedShort();
    catch_type = file.readUnsignedShort();
  }

  public CodeException(int start_pc, int end_pc, int handler_pc, int catch_type) {
    this.start_pc   = start_pc;
    this.end_pc     = end_pc;
    this.handler_pc = handler_pc;
    this.catch_type = catch_type;
  }

  public void accept(ClassVisitor v) {
    v.visitCodeException(this);
  }    

  public final void dump(DataOutputStream file) throws IOException {
    file.writeShort(start_pc);
    file.writeShort(end_pc);
    file.writeShort(handler_pc);
    file.writeShort(catch_type);
  }

  
Returns:
0, if the handler catches any exception, otherwise it points to
the exception class which is to be caught./**
   * @return 0, if the handler catches any exception, otherwise it points to
   * the exception class which is to be caught.
   */  
  public final int getCatchType() { return catch_type; }    

  
Returns:
Exclusive end index of the region where the handler is active./**
   * @return Exclusive end index of the region where the handler is active.
   */  
  public final int getEndPC() { return end_pc; }

  
Returns:
Starting address of exception handler, relative to the code./**
   * @return Starting address of exception handler, relative to the code.
   */  
  public final int getHandlerPC() { return handler_pc; }

  
Returns:
Inclusive start index of the region where the handler is active./**
   * @return Inclusive start index of the region where the handler is active.
   */
  public final int getStartPC() { return start_pc; }

  
@param
catch_type./**
   * @param catch_type.
   */
  public final void setCatchType(int catch_type) {
    this.catch_type = catch_type;
  }

  
Params:
end_pc – end of handled block/**
   * @param end_pc end of handled block
   */
  public final void setEndPC(int end_pc) {
    this.end_pc = end_pc;
  }

  
Params:
handler_pc – where the actual code is/**
   * @param handler_pc where the actual code is
   */
  public final void setHandlerPC(int handler_pc) {
    this.handler_pc = handler_pc;
  }

  
Params:
start_pc – start of handled block/**
   * @param start_pc start of handled block
   */
  public final void setStartPC(int start_pc) {
    this.start_pc = start_pc;
  }    

  
Returns:
String representation./**
   * @return String representation.
   */ 
  public final String toString() {
    return "CodeException(start_pc = " + start_pc + 
      ", end_pc = " + end_pc +
      ", handler_pc = " + handler_pc + ", catch_type = " + catch_type + ")";
  }    

  
Returns:
String representation./**
   * @return String representation.
   */ 
  public final String toString(ConstantPool cp, boolean verbose) {
    String str;

    if(catch_type == 0)
      str = "<Any exception>(0)";
    else
      str = Utility.compactClassName(cp.getConstantString(catch_type, CONSTANT_Class), false) +
	(verbose? "(" + catch_type + ")" : "");

    return start_pc + "\t" + end_pc + "\t" + handler_pc + "\t" + str;
  }

  public final String toString(ConstantPool cp) {
    return toString(cp, true);
  }

  
Returns:
deep copy of this object/**
   * @return deep copy of this object
   */
  public CodeException copy() {
    try {
      return (CodeException)clone();
    } catch(CloneNotSupportedException e) {}

    return null;
  }
}