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import soot.ArrayType;

import soot.Local;

import soot.SootClass;

import soot.SootField;

import soot.SootMethod;

import soot.Trap;

import soot.Type;

import soot.Unit;

import soot.Value;

import soot.jimple.*;

import java.util.HashMap;

import java.util.Map;

public class Representation

{

private Map<SootMethod, String> _methodRepr = new HashMap<SootMethod, String>();

private Map<SootMethod, String> _methodSigRepr = new HashMap<SootMethod, String>();

private Map<Trap, String> _trapRepr = new HashMap<Trap, String>();

public String type(SootClass c)

{

return c.getName();

}

public String type(Type t)

{

return t.toString();

}

/*

public String classconstant(Type t)

{

return "<class " + type(t) + ">";

}

*/

public String classconstant(SootClass c)

{

return "<class " + type(c) + ">";

}

public String classconstant(Type t)

{

return "<class " + type(t) + ">";

}

public String signature(SootMethod m)

{

String result = _methodSigRepr.get(m);

if(result == null)

{

result = m.getSignature();

_methodSigRepr.put(m, result);

}

return result;

}

public String signature(SootField f)

{

return f.getSignature();

}

public String simpleName(SootMethod m)

{

return m.getName();

}

public String simpleName(SootField m)

{

return m.getName();

}

public String modifier(String m)

{

return m;

}

public String descriptor(SootMethod m)

{

StringBuilder builder = new StringBuilder();

builder.append(m.getReturnType().toString());

builder.append("(");

for(int i = 0; i < m.getParameterCount(); i++)

{

builder.append(m.getParameterType(i));

if(i != m.getParameterCount() - 1)

{

builder.append(",");

}

}

builder.append(")");

return builder.toString();

}

public String thisVar(SootMethod m)

{

return compactMethod(m) + "/@this";

}

public String nativeReturnVar(SootMethod m)

{

return compactMethod(m) + "/@native-return";

}

public String param(SootMethod m, int i)

{

return compactMethod(m) + "/@param" + i;

}

public String index(int i)

{

return "" + i;

}

public String local(SootMethod m, Local l)

{

return compactMethod(m) + "/" + l.getName();

}

public String newLocalIntermediate(SootMethod m, Local l, Session session)

{

String s = local(m, l);

return s + "/intermediate/" + session.nextNumber(s);

}

public String handler(SootMethod m, Trap trap, Session session)

{

String result = _trapRepr.get(trap);

if(result == null)

{

String name = "catch " + type(trap.getException());

result = compactMethod(m) + "/" + name + "/" + session.nextNumber(name);

_trapRepr.put(trap, result);

}

return result;

}

public String throwLocal(SootMethod m, Local l, Session session)

{

String name = "throw " + l.getName();

return compactMethod(m) + "/" + name + "/" + session.nextNumber(name);

}

public String method(SootMethod m)

{

return signature(m);

}

/**

* If there is only one method with the name of m, then returns a

* compact name. Otherwise, the signature is returned.

*/

public String compactMethod(SootMethod m)

{

String result = _methodRepr.get(m);

if(result == null) {

String name = m.getName();

int count = 0;

for(SootMethod other : m.getDeclaringClass().getMethods()) {

if(other.getName().equals(name)) {

count++;

}

}

if(count > 1) {

result = m.getSignature();

}

else {

result = m.getDeclaringClass().getName() + "." + name;

}

_methodRepr.put(m, result);

}

return result;

}

public String invoke(SootMethod inMethod, InvokeExpr expr, Session session)

{

String name = expr.getMethod().getName();

return compactMethod(inMethod)

+ "/" + expr.getMethod().getDeclaringClass() + "." + name

+ "/" + session.nextNumber(name);

}

public String heapAlloc(SootMethod inMethod, AnyNewExpr expr, Session session)

{

if(expr instanceof NewExpr || expr instanceof NewArrayExpr)

{

return heapAlloc(inMethod, expr.getType(), session);

}

/* else if(expr instanceof NewMultiArrayExpr)

{

return compactMethod(inMethod) + "/" + type + "/" + session.nextNumber(type);

} */

else

{

throw new RuntimeException("Cannot handle new expression: " + expr);

}

}

public String heapMultiArrayAlloc(SootMethod inMethod, NewMultiArrayExpr expr, ArrayType type, Session session)

{

return heapAlloc(inMethod, type, session);

}

public String heapAlloc(SootMethod inMethod, Type type, Session session)

{

String s = type.toString();

return compactMethod(inMethod) + "/new " + s + "/" + session.nextNumber(s);

}

public String stringconstant(SootMethod inMethod, StringConstant constant)

{

String s = constant.toString();

String content = s.substring(1, s.length() - 1);

if(content.trim().equals(content) && content.length() > 0)

{

return content;

}

else

{

return "<<\"" + content + "\">>";

}

}

}