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/* Soot - a J*va Optimization Framework
 * Copyright (C) 2012 Eric Bodden
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
package soot.coffi;

import soot.Value;
import soot.jimple.*;

/** A constant pool entry of type CONSTANT_MethodHandle
 * @see cp_info
 * @author Eric Bodden
 */class CONSTANT_MethodHandle_info extends cp_info {
     // RoboVM note: Added possible values for kind
     public static final int REF_invokeVirtual    = 5;
     public static final int REF_invokeStatic     = 6;
     public static final int REF_invokeSpecial    = 7;
     public static final int REF_newInvokeSpecial = 8;
     public static final int REF_invokeInterface  = 9;

	 public int kind;
	 
	 public int target_index;

	 public int size() { return 4; }
	 
	   /** Returns a String representation of this entry.
	    * @param constant_pool constant pool of ClassFile.
	    * @return String representation of this entry.
	    * @see cp_info#toString
	    */
	   public String toString(cp_info constant_pool[]) {
		   //currently neglects field "kind"		   
		   cp_info target = constant_pool[target_index];
	       return target.toString(constant_pool);
	   }
	   /** Returns a String description of what kind of entry this is.
	    * @return the String "methodhandle".
	    * @see cp_info#typeName
	    */
	   public String typeName() { return "methodhandle"; }
	   
	   /** Compares this entry with another cp_info object (which may reside
	    * in a different constant pool).
	    * @param constant_pool constant pool of ClassFile for this.
	    * @param cp constant pool entry to compare against.
	    * @param cp_constant_pool constant pool of ClassFile for cp.
	    * @return a value <0, 0, or >0 indicating whether this is smaller,
	    * the same or larger than cp.
	    * @see cp_info#compareTo
	    */
	   public int compareTo(cp_info constant_pool[],cp_info cp,cp_info cp_constant_pool[]) {
	      int i;
	      if (tag!=cp.tag) return tag-cp.tag;
	      CONSTANT_MethodHandle_info cu = (CONSTANT_MethodHandle_info)cp;
	      i = constant_pool[target_index].
	         compareTo(constant_pool,cp_constant_pool[cu.target_index],cp_constant_pool);
	      if (i!=0) return i;
	      return kind-cu.kind;
	   }

 
	   public Value createJimpleConstantValue(cp_info[] constant_pool) {
	       // RoboVM note: Changed to return a SootMethodHandle
	       InvokeExpr expr = (InvokeExpr) constant_pool[target_index].createJimpleConstantValue(constant_pool);
	       return Jimple.v().newMethodHandle(kind, expr.getMethodRef());
	   }
}