// ino.module.Assign.8622.package 
package de.dhbwstuttgart.syntaxtree.statement;
// ino.end
// ino.module.Assign.8622.import 
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Vector;

import org.apache.log4j.Logger;

import de.dhbwstuttgart.bytecode.ClassFile;
import de.dhbwstuttgart.bytecode.CodeAttribute;
import de.dhbwstuttgart.bytecode.JVMCode;
import de.dhbwstuttgart.myexception.CTypeReconstructionException;
import de.dhbwstuttgart.myexception.JVMCodeException;
import de.dhbwstuttgart.myexception.SCExcept;
import de.dhbwstuttgart.myexception.SCStatementException;
import de.dhbwstuttgart.parser.JavaClassName;
import de.dhbwstuttgart.syntaxtree.Class;
import de.dhbwstuttgart.syntaxtree.SyntaxTreeNode;
import de.dhbwstuttgart.syntaxtree.type.GenericTypeVar;
import de.dhbwstuttgart.syntaxtree.type.Type;
import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
import de.dhbwstuttgart.syntaxtree.type.Void;
import de.dhbwstuttgart.typeinference.ConstraintsSet;
import de.dhbwstuttgart.typeinference.JavaCodeResult;
import de.dhbwstuttgart.typeinference.Pair;
import de.dhbwstuttgart.typeinference.ResultSet;
import de.dhbwstuttgart.typeinference.SingleConstraint;
import de.dhbwstuttgart.typeinference.assumptions.TypeAssumptions;
import de.dhbwstuttgart.typeinference.unify.Unify;




// ino.class.Assign.24926.declaration 
public class Assign extends Expr
// ino.end
// ino.class.Assign.24926.body
{
    // ino.method.Assign.24930.definition 
    public Assign(int offset,int variableLength)
    // ino.end
    // ino.method.Assign.24930.body 
    {
        super(offset,variableLength);
    }
    // ino.end


    // ino.attribute.expr1.24933.declaration 
    public Expr expr1;
    // ino.end
    // ino.attribute.expr2.24936.declaration 
    public Expr expr2;
    // ino.end

    // ino.attribute.parserlog.24939.decldescription type=javadoc
    /**
     * Logger log4j
     */
    // ino.end
    // ino.attribute.parserlog.24939.declaration 
    protected static Logger parserlog = Logger.getLogger("parser");
    // ino.end
    
    
    // ino.method.set_Expr.24942.definition 
    public void set_Expr(Expr expr1,Expr expr2)
    // ino.end
    // ino.method.set_Expr.24942.body 
    {
        this.expr1 = expr1;
        this.expr2 = expr2;
    }
    // ino.end
    
    
    
    
    
    // ino.method.get_Name.24948.definition 
    public String get_Name()
    // ino.end
    // ino.method.get_Name.24948.body 
    {
        return null;
    }
    // ino.end
    
    
    
    // ino.method.codegen.24951.definition 
    public void codegen(ClassFile classfile, CodeAttribute code, Vector paralist)
    throws JVMCodeException
    // ino.end
    // ino.method.codegen.24951.body 
    {
        // AutoBoxing-Feature: Literale koennen nur als Objekt zugewiesen werden
        if (expr2 instanceof Literal) ((Literal)expr2).setPrimitiveFlag(false);
        
        
        if(expr1 instanceof LocalOrFieldVar)
        {
            LocalOrFieldVar local = (LocalOrFieldVar)expr1;
            Vector name_vector = local.get_Name_Vector();
            Vector type_vector = local.get_Type_Vector();
            String local_name = null;
            String class_name = null;
            String type = null;
            for(int i=0; i < name_vector.size()-1; i++)
            {
                local_name = (String)name_vector.elementAt(i);
                type = JVMCode.get_codegen_Type((String)type_vector.elementAt(i), paralist);
                int index = code.get_indexOf_Var(local_name);
                if(index != -1)
                {
                    // LocalVar
                    try
                    {
                    	JavaClassName local_type = code.get_TypeOf_Var(local_name).getName();
                        code.add_code(JVMCode.nload_n(local_type.toString(), index));
                    }
                    catch(JVMCodeException e)
                    {
                        // out of nload_n
                        String local_type = code.get_TypeOf_Var(local_name).getName().toString();
                        code.add_code(JVMCode.nload(local_type));
                        code.add_code_byte((byte)index);
                    }
                }
                else
                {
                    // FieldVar
                    code.add_code(JVMCode.aload_0);
                    code.add_code(JVMCode.getfield);
                    code.add_code_short(classfile.add_field_ref(local_name, class_name, type));
                }
                class_name = (String)type_vector.elementAt(i);
            }
            expr2.codegen(classfile, code, paralist);
            local_name = (String)name_vector.lastElement();
            int index = code.get_indexOf_Var(local_name);
            if(index != -1)
            {
                // LocalVar
                try
                {
                    String local_type = code.get_TypeOf_Var(local_name).getName().toString();
                    code.add_code(JVMCode.nstore_n(local_type, index));
                }
                catch(JVMCodeException e)
                {
                    // out of nstore_n
                    String local_type = code.get_TypeOf_Var(local_name).getName().toString();
                    code.add_code(JVMCode.nstore(local_type));
                    code.add_code_byte((byte)index);
                }
            }
            else
            {
                // FieldVar
                code.add_code(JVMCode.putfield);
                code.add_code_short(classfile.add_field_ref(local_name, class_name, JVMCode.get_codegen_Type(expr2.getTypeName(), paralist)));
            }
        }
        else if(expr1 instanceof InstVar)
        {
            InstVar instvar = (InstVar)expr1;
            String instvar_name = instvar.get_codegen_UsedId();
            code.add_code(JVMCode.aload_0);
            expr2.codegen(classfile, code, paralist);
            code.add_code(JVMCode.putfield);
            code.add_code_short(classfile.add_field_ref(instvar_name, null, null));
        }
        else throw new  JVMCodeException("JVMCodeException: Assign: void test codegen(ClassFile classfile, Code_attribute code)");
    }
    // ino.end

    /**
     * @author AI10023 - Andreas Stadelmeier
     */
	@Override
	public ConstraintsSet TYPEExpr(TypeAssumptions assumptions) {
		ConstraintsSet ret = new ConstraintsSet();
		ret.add(expr1.TYPEExpr(assumptions));
		ret.add(expr2.TYPEExpr(assumptions));
		//this.setTypeVariable( TypePlaceholder.fresh(this));
		this.setType(TypePlaceholder.fresh(this));
		ret.add(new SingleConstraint(expr2.getType().TYPE(assumptions, this), expr1.getType().TYPE(assumptions, this))); //expr2.type <. expr1.type
		ret.add(new SingleConstraint(expr1.getType().TYPE(assumptions, this), this.getType().TYPE(assumptions, this))); 
		return ret;
	}
	
	/**
	 * Spezifikation:
	 * 	TYPEStmt( Ass, stmt ) =
	 * 	let (stmt : rty, ConS) = TYPEExpr( Ass, stmt )
	 * 	in (stmt : Void, ConS)
	 */
	@Override
	public ConstraintsSet TYPEStmt(TypeAssumptions assumptions){
		ConstraintsSet ret = this.TYPEExpr(assumptions); //TypeExpr aufrufen
		this.setType(new Void(this,0)); //Typ des Statments auf Void setzen.
		return ret;
	}


    
     // ino.method.toString.24960.defdescription type=javadoc
     /**
      * <br/>Author: Martin Pl�micke
      * @return
      */
     // ino.end
    // ino.method.toString.24960.definition 
    public String toString()
    // ino.end
    // ino.method.toString.24960.body 
    {
    	if(getType() == null)return "(" + expr1.toString() + " = " + expr2.toString() + ")";
        return getType().toString() + "(" + expr1.toString() + " = " + expr2.toString() + ")";
    }
    // ino.end


    // ino.method.wandleRefTypeAttributes2GenericAttributes.24963.definition 
    public void wandleRefTypeAttributes2GenericAttributes(Vector<Type> paralist, Vector<GenericTypeVar> genericMethodParameters)
    // ino.end
    // ino.method.wandleRefTypeAttributes2GenericAttributes.24963.body 
    {
    }
    // ino.end
    

    @Override
    public String getTypeInformation(){
        return "(" + expr1.getTypeInformation() + " = " + expr2.getTypeInformation() + ") : "+this.getType();
    }

    @Override
    public JavaCodeResult printJavaCode(ResultSet resultSet){
    	JavaCodeResult ret = new JavaCodeResult().attach(this.expr1.printJavaCode(resultSet) ).attach( " = " ).attach( this.expr2.printJavaCode(resultSet));
    	return ret;
    }





	@Override
	public Vector<SyntaxTreeNode> getChildren() {
		Vector<SyntaxTreeNode> ret = new Vector<SyntaxTreeNode>();
		ret.add(this.expr1);
		ret.add(this.expr2);
		return ret;
	}

}
// ino.end