/**
* Copyright (C) 2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mujava.op;
import java.io.*;
import java.util.Vector;
import openjava.mop.*;
import openjava.ptree.*;
/**
* <p>Generate JTD (Java-specific this keyword deletion) --
* delete each occurrence of the keyword <i>this</i>
* </p>
* @author Yu-Seung Ma
* @version 1.0
*/
public class JTD extends mujava.op.util.Mutator
{
Vector instanceVar = new Vector();
Vector localVar = new Vector();
boolean isJTDTarget = false;
public JTD(FileEnvironment file_env, ClassDeclaration cdecl, CompilationUnit comp_unit)
{
super( file_env, comp_unit );
}
public void visit( AssignmentExpression p ) throws ParseTreeException
{
Expression newp = this.evaluateDown( p );
if (newp != p)
{
p.replace( newp );
return;
}
p.childrenAccept( this );
newp = this.evaluateUp( p );
if (newp != p)
p.replace( newp );
}
boolean isTarget( Parameter p ) throws ParseTreeException
{
for (int i=0; i<instanceVar.size(); i++)
{
String field_name = instanceVar.get(i).toString();
if (field_name.equals(p.getVariable()))
{
localVar.add(p.getVariable());
return true;
}
}
return false;
}
public void visit( FieldDeclaration p ) throws ParseTreeException
{
instanceVar.add(p.getName());
}
public void visit( ConstructorDeclaration p ) throws ParseTreeException
{
ParameterList plist = p.getParameters();
localVar.removeAllElements();
for (int i=0; i<plist.size(); i++)
{
if (isTarget(plist.get(i)))
{
isJTDTarget = true;
}
}
if (isJTDTarget)
{
super.visit(p);
}
isJTDTarget = false;
}
public void visit( MethodDeclaration p ) throws ParseTreeException
{
ParameterList plist = p.getParameters();
localVar.removeAllElements();
for (int i=0; i<plist.size(); i++)
{
if (isTarget(plist.get(i)))
{
isJTDTarget = true;
}
}
if (isJTDTarget)
{
super.visit(p);
}
isJTDTarget = false;
}
public void visit( FieldAccess p ) throws ParseTreeException
{
Expression ref_exp = p.getReferenceExpr();
String var_name = p.getName();
if (ref_exp instanceof SelfAccess)
{
if (((SelfAccess)ref_exp).getAccessType() == SelfAccess.THIS)
{
for (int i=0; i<localVar.size(); i++)
{
if (var_name.equals(localVar.get(i).toString()))
{
FieldAccess mutant = (FieldAccess)p.makeRecursiveCopy();
mutant.setReferenceExpr(null);
outputToFile(p, mutant);
}
}
}
}
}
/**
* Output JTD mutants to files
* @param original
* @param mutant
*/
public void outputToFile(FieldAccess original, FieldAccess mutant)
{
if (comp_unit == null)
return;
String f_name;
num++;
f_name = getSourceName(this);
String mutant_dir = getMuantID();
try
{
PrintWriter out = getPrintWriter(f_name);
ISK_JTD_Writer writer = new ISK_JTD_Writer(mutant_dir, out);
writer.setMutant(original, mutant);
comp_unit.accept( writer );
out.flush();
out.close();
} catch ( IOException e )
{
System.err.println( "fails to create " + f_name );
} catch ( ParseTreeException e )
{
System.err.println( "errors during printing " + f_name );
e.printStackTrace();
}
}
/**
* Output JTD mutants to files
* @param original
* @param mutant
*/
public void outputToFile(MethodCall original, MethodCall mutant)
{
if (comp_unit == null)
return;
String f_name;
num++;
f_name = getSourceName(this);
String mutant_dir = getMuantID();
try
{
PrintWriter out = getPrintWriter(f_name);
ISK_JTD_Writer writer = new ISK_JTD_Writer(mutant_dir, out);
writer.setMutant(original, mutant);
comp_unit.accept( writer );
out.flush();
out.close();
} catch ( IOException e )
{
System.err.println( "fails to create " + f_name );
} catch ( ParseTreeException e )
{
System.err.println( "errors during printing " + f_name );
e.printStackTrace();
}
}
}