/**
* 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 openjava.mop.*;
import openjava.ptree.*;
/**
* <p>Generate PCD (Type cast operator deletion) mutants --
* deletes type casting operator
* </p>
* <p><i>Example</i>: <br/>
* Child cRef; Parent pRef = cRef; ((Child)pRef).toString(); is mutated to <br>
* Child cRef; Parent pRef = cRef; pRef.toString();
* </p>
* @author Yu-Seung Ma
* @version 1.0
*/
public class PCD extends mujava.op.util.TypeCastMutator
{
public PCD(FileEnvironment file_env, ClassDeclaration cdecl, CompilationUnit comp_unit)
{
super( file_env, comp_unit );
}
public void visit( CastExpression p ) throws ParseTreeException
{
String afterCastType = p.getTypeSpecifier().getName();
String beforeCastType = getType(p.getExpression()).getName();
if ((afterCastType == null) || (beforeCastType == null))
return;
if (afterCastType.equals(beforeCastType))
return;
if (currentMethodCall == null)
{
if (hasHidingVariableOrOverridingMethod(afterCastType, beforeCastType))
{
outputToFile(p);
}
}
else
{
try
{
String method_name = currentMethodCall.getName();
Class[] par_type = getParameterTypes(currentMethodCall);
if ( isNonAbstractOverridingMethodCall(afterCastType, beforeCastType, method_name, par_type))
{
outputToFile(p);
}
} catch (Exception e)
{
// e.printStackTrace();
}
}
}
public void visit( MethodCall p ) throws ParseTreeException
{
Expression newp = this.evaluateDown( p );
if (newp != p)
{
p.replace( newp );
return;
}
Expression ref = p.getReferenceExpr();
if (ref != null)
{
currentMethodCall = p;
ref.accept(this);
currentMethodCall = null;
}
ExpressionList list = p.getArguments();
if (list != null)
list.accept(this);
}
/**
* Write PCD mutants to files
* @param original
*/
public void outputToFile(CastExpression original)
{
if (comp_unit == null)
return;
String f_name;
num++;
f_name = getSourceName(this);
String mutant_dir = getMuantID();
try
{
PrintWriter out = getPrintWriter(f_name);
PCD_Writer writer = new PCD_Writer( mutant_dir, out );
writer.setMutant(original);
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();
}
}
}