JavaPatternMatching/src/de/dhbwstuttgart/syntaxtree/statement/WhileStmt.java

// ino.module.WhileStmt.8659.package 
package de.dhbwstuttgart.syntaxtree.statement;
// ino.end
// ino.module.WhileStmt.8659.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.syntaxtree.Class;
import de.dhbwstuttgart.syntaxtree.SyntaxTreeNode;
import de.dhbwstuttgart.syntaxtree.operator.LogOp;
import de.dhbwstuttgart.syntaxtree.operator.Operator;
import de.dhbwstuttgart.syntaxtree.operator.RelOp;
import de.dhbwstuttgart.syntaxtree.type.BooleanType;
import de.dhbwstuttgart.syntaxtree.type.GenericTypeVar;
import de.dhbwstuttgart.syntaxtree.type.RefType;
import de.dhbwstuttgart.syntaxtree.type.Type;
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.exceptions.NotImplementedException;
import de.dhbwstuttgart.typeinference.unify.CSubstitutionSet;
import de.dhbwstuttgart.typeinference.unify.Unify;




// ino.class.WhileStmt.26326.declaration 
public class WhileStmt extends Statement
// ino.end
// ino.class.WhileStmt.26326.body
{
    // ino.method.WhileStmt.26330.definition 
    public WhileStmt(int offset, int variableLength)
    // ino.end
    // ino.method.WhileStmt.26330.body 
    {
        super(offset,variableLength);
    }
    // ino.end

    // ino.attribute.expr.26333.declaration 
    public Expr expr;
    // ino.end
    // ino.attribute.loop_block.26336.declaration 
    public Statement loop_block;
    // ino.end
    
    // ino.attribute.parserlog.26339.declaration 
    protected static Logger parserlog = Logger.getLogger("parser");
    // ino.end
    
    // ino.method.set_Expr.26342.definition 
    public void set_Expr(Expr exp)
    // ino.end
    // ino.method.set_Expr.26342.body 
    {
    this.expr = exp;
    }
    // ino.end

    // ino.method.set_Loop_block.26345.definition 
    public void set_Loop_block(Statement blk)
    // ino.end
    // ino.method.set_Loop_block.26345.body 
    {
    this.loop_block = blk;
    }
    // ino.end

    // ino.method.codegen.26351.definition 
    public void codegen(ClassFile classfile, CodeAttribute code, Vector paralist)
    throws JVMCodeException
    // ino.end
    // ino.method.codegen.26351.body 
    {
    if(loop_block!=null && expr!=null) {
        code.add_code(JVMCode.goto_);
        int breakpoint = code.get_code_length();
        code.add_code_short(0);
        loop_block.codegen(classfile, code, paralist);
        code.set_code_short(code.get_code_length() + 1 - breakpoint, breakpoint);
    
        loop_codegen(classfile, code, breakpoint, false, paralist);
    }
    }
    // ino.end

    // ino.method.loop_codegen.26354.definition 
    public void loop_codegen(ClassFile classfile, CodeAttribute code, int breakpoint, boolean not, Vector paralist)
    throws JVMCodeException
    // ino.end
    // ino.method.loop_codegen.26354.body 
    {
    if(expr instanceof NotExpr) {
        expr = ((NotExpr)expr).get_Expr();
        loop_codegen(classfile, code, breakpoint, !not, paralist);
    }
    else if(expr instanceof Binary) {
        Operator op = ((Binary)expr).get_Operator();
        if(op instanceof LogOp) ((LogOp)op).loop_codegen(classfile, code, expr, breakpoint, !not, paralist);
        else if(op instanceof RelOp) {
        Expr expr1 = ((Binary)expr).get_Expr1();
        Expr expr2 = ((Binary)expr).get_Expr2();
        expr1.codegen(classfile, code, paralist);
        expr2.codegen(classfile, code, paralist);
    
        if(expr1 instanceof Null || expr2 instanceof Null) ((RelOp)op).if_codegen(classfile, code, "null", !not);
        else ((RelOp)op).if_codegen(classfile, code, expr1.getTypeName(), !not);
    
        code.add_code_short(breakpoint + 3 - code.get_code_length());
        }
        else throw new JVMCodeException("JVMCodeException: WhileStmt: void loop_codegen(ClassFile classfile, Code_attribute code, int breakpoint, boolean not)");
    }
    else {
        expr.codegen(classfile, code, paralist);
        if(!not) code.add_code(JVMCode.ifne);
        else code.add_code(JVMCode.ifeq);
        code.add_code_short(breakpoint + 3 - code.get_code_length());
    }
    }
    // ino.end

    // ino.method.toString.26360.defdescription type=javadoc
    /**
     * <br/>Author: Martin Pl<EFBFBD>micke
     * @return
     */
    // ino.end
    // ino.method.toString.26360.definition 
    public String toString()
    // ino.end
    // ino.method.toString.26360.body 
    {
        return "WHILE " + loop_block.toString();
    }
    // ino.end
    
    // ino.method.wandleRefTypeAttributes2GenericAttributes.26363.definition 
    public void wandleRefTypeAttributes2GenericAttributes(Vector<Type> paralist, Vector<GenericTypeVar> genericMethodParameters)
    // ino.end
    // ino.method.wandleRefTypeAttributes2GenericAttributes.26363.body 
    {
        if(loop_block!=null){
            loop_block.wandleRefTypeAttributes2GenericAttributes(paralist,genericMethodParameters);
        }
        
    }
    // ino.end
    
	@Override
	public ConstraintsSet TYPEStmt(TypeAssumptions assumptions) {
		ConstraintsSet ret = new ConstraintsSet();
		ret.add(expr.TYPEExpr(assumptions));
		SingleConstraint exprMustBeBool = new SingleConstraint(expr.getType().TYPE(assumptions, this), assumptions.getTypeFor(new RefType("Boolean",this, 0), this)); // while(expr){}; expr <. boolean
		ret.add(exprMustBeBool);
		ret.add(this.loop_block.TYPEStmt(assumptions));
		this.setType(loop_block.getType());
		return ret;
	}

	public int getTypeLineNumber() {
		throw new NotImplementedException();
	}

	@Override
	public JavaCodeResult printJavaCode(ResultSet resultSet) {
		return new JavaCodeResult().attach("while(").attach(this.expr.printJavaCode(resultSet)).attach(")").attach(this.loop_block.printJavaCode(resultSet));
	}

	@Override
	public Vector<SyntaxTreeNode> getChildren() {
		Vector<SyntaxTreeNode> ret = new Vector<SyntaxTreeNode>();
		ret.add(this.expr);
		ret.add(this.loop_block);
		return ret;
	}
}
// ino.end