2013-10-18 11:33:46 +00:00
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// ino.module.IfStmt.8632.package
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2014-09-02 08:33:54 +00:00
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package de.dhbwstuttgart.syntaxtree.statement;
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2013-10-18 11:33:46 +00:00
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// ino.end
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// ino.module.IfStmt.8632.import
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Iterator;
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import java.util.Vector;
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2014-02-09 15:07:31 +00:00
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2013-10-18 11:33:46 +00:00
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import mycompiler.mybytecode.ClassFile;
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import mycompiler.mybytecode.CodeAttribute;
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import mycompiler.mybytecode.JVMCode;
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import mycompiler.myexception.CTypeReconstructionException;
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import mycompiler.myexception.JVMCodeException;
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import mycompiler.myexception.SCExcept;
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import mycompiler.myexception.SCStatementException;
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import mycompiler.mytypereconstruction.CSubstitution;
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import mycompiler.mytypereconstruction.CSupportData;
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import mycompiler.mytypereconstruction.CTriple;
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import mycompiler.mytypereconstruction.replacementlistener.CReplaceTypeEvent;
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import mycompiler.mytypereconstruction.set.CSubstitutionSet;
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import mycompiler.mytypereconstruction.set.CTripleSet;
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import mycompiler.mytypereconstruction.set.CTypeAssumptionSet;
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import mycompiler.mytypereconstruction.typeassumption.CTypeAssumption;
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2014-02-09 15:07:31 +00:00
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2013-10-18 11:33:46 +00:00
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import org.apache.log4j.Logger;
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// ino.end
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2014-02-09 15:07:31 +00:00
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2014-02-19 22:04:48 +00:00
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2014-09-02 08:33:54 +00:00
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2014-09-02 09:07:16 +00:00
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2014-09-02 08:33:54 +00:00
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import de.dhbwstuttgart.core.SyntaxTreeNode;
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import de.dhbwstuttgart.syntaxtree.Class;
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import de.dhbwstuttgart.syntaxtree.operator.LogOp;
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import de.dhbwstuttgart.syntaxtree.operator.Operator;
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import de.dhbwstuttgart.syntaxtree.operator.RelOp;
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import de.dhbwstuttgart.syntaxtree.type.BooleanType;
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import de.dhbwstuttgart.syntaxtree.type.GenericTypeVar;
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import de.dhbwstuttgart.syntaxtree.type.Pair;
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import de.dhbwstuttgart.syntaxtree.type.RefType;
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import de.dhbwstuttgart.syntaxtree.type.Type;
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import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
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import de.dhbwstuttgart.syntaxtree.type.Void;
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import de.dhbwstuttgart.typeinference.ConstraintsSet;
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import de.dhbwstuttgart.typeinference.FreshTypeVariable;
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import de.dhbwstuttgart.typeinference.JavaCodeResult;
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import de.dhbwstuttgart.typeinference.ResultSet;
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import de.dhbwstuttgart.typeinference.SingleConstraint;
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import de.dhbwstuttgart.typeinference.assumptions.TypeAssumptions;
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2014-09-02 09:07:16 +00:00
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import de.dhbwstuttgart.typeinference.unify.MUB;
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import de.dhbwstuttgart.typeinference.unify.Unify;
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2013-10-18 11:33:46 +00:00
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import sun.reflect.generics.reflectiveObjects.NotImplementedException;
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// ino.class.IfStmt.25300.declaration
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public class IfStmt extends Statement
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// ino.end
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// ino.class.IfStmt.25300.body
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{
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// ino.method.IfStmt.25304.definition
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public IfStmt(int offset, int variableLength)
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// ino.end
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// ino.method.IfStmt.25304.body
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{
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super(offset,variableLength);
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}
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// ino.end
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// ino.attribute.hamaDebug.25307.declaration
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public boolean hamaDebug = true; //hama: Debug Ausgaben von mir ein- bzw. ausschalten
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// ino.end
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// ino.attribute.expr.25310.declaration
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public Expr expr;
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// ino.end
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// ino.attribute.then_block.25313.declaration
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public Statement then_block;
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// ino.end
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// ino.attribute.else_block.25316.declaration
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public Statement else_block;
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// ino.end
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// ino.attribute.parserlog.25319.declaration
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protected static Logger parserlog = Logger.getLogger("parser");
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// ino.end
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// ino.method.set_Expr.25322.definition
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public void set_Expr(Expr exp)
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// ino.end
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// ino.method.set_Expr.25322.body
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{
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this.expr = exp;
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}
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// ino.end
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// ino.method.set_Then_block.25325.definition
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public void set_Then_block(Statement blk)
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// ino.end
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// ino.method.set_Then_block.25325.body
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{
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this.then_block = blk;
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}
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// ino.end
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// ino.method.set_Else_block.25328.definition
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public void set_Else_block(Statement blk)
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// ino.end
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// ino.method.set_Else_block.25328.body
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{
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this.else_block = blk;
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}
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// ino.end
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// ino.method.codegen.25334.definition
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public void codegen(ClassFile classfile, CodeAttribute code, Vector paralist)
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throws JVMCodeException
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// ino.end
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// ino.method.codegen.25334.body
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{
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if_codegen(classfile, code, false, paralist);
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}
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// ino.end
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// ino.method.if_codegen.25337.definition
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public void if_codegen(ClassFile classfile, CodeAttribute code, boolean not, Vector paralist)
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throws JVMCodeException
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// ino.end
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// ino.method.if_codegen.25337.body
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{
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if(expr instanceof NotExpr)
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{
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expr = ((NotExpr)expr).get_Expr();
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if_codegen(classfile, code, !not, paralist);
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}
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else
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{
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if(expr instanceof Binary)
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{
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Operator op = ((Binary)expr).get_Operator();
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if(op instanceof LogOp)
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{
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((LogOp)op).if_codegen(classfile, code, not, expr, then_block, else_block, paralist);
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}
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else
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{
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if(op instanceof RelOp)
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{
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Expr expr1 = ((Binary)expr).get_Expr1();
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Expr expr2 = ((Binary)expr).get_Expr2();
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expr1.codegen(classfile, code, paralist);
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expr2.codegen(classfile, code, paralist);
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if(expr1 instanceof Null || expr2 instanceof Null)
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{
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((RelOp)op).if_codegen(classfile, code, "null", not);
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}
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else
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{
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((RelOp)op).if_codegen(classfile, code, expr1.getTypeName(), not);
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}
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int breakpoint1 = code.get_code_length();
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code.add_code_short(0);
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if(then_block!=null)
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{
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then_block.codegen(classfile, code, paralist);
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code.set_code_short(code.get_code_length() + 1 - breakpoint1, breakpoint1);
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}
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int breakpoint2 = code.get_code_length();
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if(else_block != null)
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{
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code.add_code(JVMCode.goto_);
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code.add_code_short(0); // replaced later
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else_block.codegen(classfile, code, paralist);
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code.set_code_short(breakpoint2 + 4 - breakpoint1, breakpoint1);
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code.set_code_short(code.get_code_length() - breakpoint2, breakpoint2 + 1);
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}
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}
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else
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{
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throw new JVMCodeException("JVMCodeException: IfStmt: void if_codegen(ClassFile classfile, Code_attribute code, boolean not)");
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}
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}
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}
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else
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{
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expr.codegen(classfile, code, paralist);
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if(!not)
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{
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code.add_code(JVMCode.ifeq);
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}
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else
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{
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code.add_code(JVMCode.ifne);
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}
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int breakpoint1 = code.get_code_length();
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code.add_code_short(0);
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if(then_block!=null)
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{
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then_block.codegen(classfile, code, paralist);
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code.set_code_short(code.get_code_length() + 1 - breakpoint1, breakpoint1);
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}
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int breakpoint2 = code.get_code_length();
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if(!(else_block==null || else_block instanceof EmptyStmt))
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{
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//hama: Die zwei folgenen if-Abfragen wurden eingef<65>gt und beheben den Bug,
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//der zuerst im Use Case Toggle1 bemerkt wurde. Hier wird nun gepr<70>ft ob der
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//letzte Befehl in einem if-Block ein return war. Trifft dieser Fall zu,
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//so wird kein goto Befehl (f<>r das <20>berspringen des else-Blocks eingef<65>gt)
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//-> das verlangt die vm ->der code w<>re nicht erreichbar.
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//Allerdings k<>nnte das return-Statement nat<61>rlich auch an einer anderen
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//Stelle (nicht als letzter Befehl) stehen, f<>r diesen Fall d<>rfte die
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//Codegenerierung noch nicht funktionieren. Hab versucht diesen Fall mit
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//Toggle3 zu erzeugen - wird aber richtig generiert.
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//letztes Statement im Vector in s schreiben
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//Statement s = (Statement)(((Block)this.then_block).statements.lastElement());
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//Instanz von Return zum pr<70>fen anlegen
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Return r = new Return(getOffset(),getVariableLength());
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if( !(((Block)this.then_block).statements.lastElement()).getClass().equals(r.getClass()) )
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{
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code.add_code(JVMCode.goto_);
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code.add_code_short(0);
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}
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else_block.codegen(classfile, code, paralist);
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if( !(((Block)this.then_block).statements.lastElement()).getClass().equals(r.getClass()) )
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{
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code.set_code_short(breakpoint2 + 4 - breakpoint1, breakpoint1);
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code.set_code_short(code.get_code_length()-breakpoint2, breakpoint2 + 1);
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}
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}
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}
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}
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}
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// ino.end
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// ino.method.makeNewResult.25343.definition
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private void makeNewResult(MUB Mub, CTriple triple, CTypeAssumptionSet V, CTripleSet returnSet)
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throws CTypeReconstructionException
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// ino.end
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// ino.method.makeNewResult.25343.body
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{
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CSubstitutionSet unifier = new CSubstitutionSet(Mub.getUnifier());
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// --------------------------
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// Typannahmen bauen:
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// --------------------------
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CTypeAssumptionSet V_substituted = V.deepCopy();
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V_substituted.sub(unifier);
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// --------------------------
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// Substitutionen bauen:
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// --------------------------
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CSubstitutionSet substSet = triple.getSubstitutions().deepCopy();
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substSet.applyUnifier(unifier);
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substSet.unite(unifier);
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// --------------------------
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// R<>ckgabetyp bauen:
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// --------------------------
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Iterator<? extends Type> setMubIt = Mub.getMub().iterator();
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while(setMubIt.hasNext()) {
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Type retType = setMubIt.next();
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Type retType2 = substSet.applyThisSubstitutionSet(retType.clone());
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// Muesste eigentlich cloneAndApplyUnify machen PL 06-03-18
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// If(Rettype Instanceof TypePlaceholders){
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// Iterator<Csubstitution> Pairit = Unifier.Getiterator();
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// While(Pairit.Hasnext()){
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// Csubstitution Pair = Pairit.Next();
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// If(Pair.Gettypevar().Getname().Equals(Rettype.Getname())){
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// Rettype = Pair.Gettype();
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// Break;
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// }
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// }
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// }
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// --------------------------
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CTriple resultTriple = new CTriple(substSet, retType2, V_substituted);
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//CSubstitutionSet CSubstUnifier = new CSubstitutionSet(unifier);
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//CTriple resultTriple2 = retTriple.cloneAndApplyUnify(CSubstUnifier);
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// --------------------------
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// Triple zu R<>ckgabemenge hinzuf<75>gen
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// --------------------------
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if(!returnSet.contains(resultTriple)){
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returnSet.addElement(resultTriple);
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}
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}
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}
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// ino.end
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// ino.method.applyUnifier.25346.definition
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private void applyUnifier(Vector<Vector<Pair>> unifierPossibilities, CTriple triple, CTypeAssumptionSet V, CTripleSet returnSet)
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throws CTypeReconstructionException
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// ino.end
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// ino.method.applyUnifier.25346.body
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{
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// --------------------------
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// Wenn Unifier vorhanden, dann anwenden:
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// --------------------------
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if(unifierPossibilities.size()!=0){
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// --------------------------
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// Alle m<>glichen Unifier auf V_i,j anwenden:
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// --------------------------
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for(int k=0; k<unifierPossibilities.size(); k++){
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CSubstitutionSet unifier = new CSubstitutionSet(unifierPossibilities.elementAt(k));
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// --------------------------
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// Typannahmen bauen:
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// --------------------------
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CTypeAssumptionSet V_substituted = V.deepCopy();
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V_substituted.sub(unifier);
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// --------------------------
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// Substitutionen bauen:
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// --------------------------
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CSubstitutionSet substSet = triple.getSubstitutions().deepCopy();
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substSet.applyUnifier(unifier);
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substSet.unite(unifier);
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// --------------------------
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// R<>ckgabetyp bauen:
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// --------------------------
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Type retType = triple.getResultType();
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if(retType instanceof TypePlaceholder){
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Iterator<CSubstitution> pairIt = unifier.getIterator();
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while(pairIt.hasNext()){
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CSubstitution pair = pairIt.next();
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if(pair.getTypeVar().getName().equals(retType.getName())){
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retType = pair.getType();
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break;
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}
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}
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}
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// --------------------------
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CTriple resultTriple = new CTriple(substSet, retType, V_substituted);
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// --------------------------
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// Triple zu R<>ckgabemenge hinzuf<75>gen
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// --------------------------
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if(!returnSet.contains(resultTriple)){
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returnSet.addElement(resultTriple);
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}
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}
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}
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// --------------------------
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// Ansonsten Fehlermeldung:
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// --------------------------
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else {
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throw new CTypeReconstructionException("IfStmt.TRStatement(): Block-Typen lassen sich nicht unifizieren.",this);
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}
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}
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// ino.end
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// ino.method.wandleRefTypeAttributes2GenericAttributes.25349.definition
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public void wandleRefTypeAttributes2GenericAttributes(Vector<Type> paralist, Vector<GenericTypeVar> genericMethodParameters)
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// ino.end
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// ino.method.wandleRefTypeAttributes2GenericAttributes.25349.body
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{
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if(then_block!=null){
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then_block.wandleRefTypeAttributes2GenericAttributes(paralist,genericMethodParameters);
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}
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if(else_block!=null){
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else_block.wandleRefTypeAttributes2GenericAttributes(paralist,genericMethodParameters);
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}
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}
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// ino.end
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public boolean addOffsetsToStatement(CTypeAssumption localAssumption, String NameVariable, boolean isMemberVariable)
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{
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expr.addOffsetsToExpression(localAssumption,NameVariable,isMemberVariable);
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else_block.addOffsetsToStatement(localAssumption,NameVariable,isMemberVariable);
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then_block.addOffsetsToStatement(localAssumption,NameVariable,isMemberVariable);
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return true;
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}
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@Override
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public ConstraintsSet TYPEStmt(TypeAssumptions assumptions) {
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ConstraintsSet ret = new ConstraintsSet();
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2014-02-11 15:30:38 +00:00
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this.setType(TypePlaceholder.fresh(this));
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2013-10-18 11:33:46 +00:00
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ret.add(expr.TYPEExpr(assumptions)); // die Constraints f<>r (expressionDesIfStmt)
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ret.add(this.then_block.TYPEStmt(assumptions));
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if(else_block!=null){
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ret.add(this.else_block.TYPEStmt(assumptions));
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2014-02-11 15:30:38 +00:00
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if(!(else_block.getType() instanceof Void))ret.add(new SingleConstraint(else_block.getType(),this.getType()));
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2013-10-18 11:33:46 +00:00
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}
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2014-08-11 12:35:33 +00:00
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ret.add(new SingleConstraint(expr.getType(),assumptions.getTypeFor(new RefType("Boolean",0), this))); //(expressionDesIfStmt)<.boolean
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2014-02-11 15:30:38 +00:00
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if(!(then_block.getType() instanceof Void))ret.add(new SingleConstraint(then_block.getType(),this.getType()));
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if(then_block.getType() instanceof Void &&
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(else_block == null || else_block.getType() instanceof Void))this.setType(new Void(this.getOffset()));
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2013-10-18 11:33:46 +00:00
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return ret;
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}
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public void replaceType(CReplaceTypeEvent e) {
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// TODO Auto-generated method stub
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throw new NotImplementedException();
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}
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public int getTypeLineNumber() {
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throw new NotImplementedException();
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}
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@Override
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public JavaCodeResult printJavaCode(ResultSet resultSet) {
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JavaCodeResult ret = new JavaCodeResult("If(").attach(this.expr.printJavaCode(resultSet)).attach("){\n");
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if(this.then_block!=null)ret.attach(this.then_block.printJavaCode(resultSet));
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ret.attach("\n}else{\n");
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if(this.else_block!=null)ret.attach(this.else_block.printJavaCode(resultSet));
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ret.attach("\n}");
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return ret;
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}
|
2014-02-19 22:04:48 +00:00
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@Override
|
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|
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public Vector<SyntaxTreeNode> getChildren() {
|
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|
|
Vector<SyntaxTreeNode> ret = new Vector<SyntaxTreeNode>();
|
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if(this.expr!=null)ret.add(this.expr);
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if(this.else_block!=null)ret.add(this.else_block);
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if(this.then_block!=null)ret.add(this.then_block);
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return ret;
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}
|
2013-10-18 11:33:46 +00:00
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}
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// ino.end
|