package com.sap.runlet.interpreter.nativestdlib;
import behavioral.actions.Statement;
import com.sap.ap.metamodel.utils.StringFormatter;
import com.sap.runlet.abstractinterpreter.Interpreter;
import com.sap.runlet.abstractinterpreter.objects.RunletObject;
import com.sap.runlet.abstractinterpreter.util.Fraction;
import com.sap.runlet.interpreter.RunletInterpreter;
import com.sap.runlet.interpreter.RunletStackFrame;
import com.sap.runlet.interpreter.objects.NativeObject;
import com.sap.runlet.interpreter.statements.ReturnInterpreter;
import data.classes.Association;
import data.classes.AssociationEnd;
import data.classes.ClassTypeDefinition;
import data.classes.MethodSignature;
import data.classes.NativeImpl;
import data.classes.Parameter;
import data.classes.SapClass;
import data.classes.SignatureImplementation;
import data.classes.TypeDefinition;
import dataaccess.expressions.Expression;
public class StringInterpreter implements Interpreter<NativeImpl, SapClass, TypeDefinition, ClassTypeDefinition,
Association, AssociationEnd, Statement, Expression, SignatureImplementation,
RunletStackFrame, NativeImpl, RunletInterpreter> {
private NativeImpl nativeImpl;
public StringInterpreter(NativeImpl nativeImpl) {
this.nativeImpl = nativeImpl;
}
@Override
public RunletObject<AssociationEnd, TypeDefinition, ClassTypeDefinition> evaluate(RunletInterpreter interpreter) throws SecurityException, IllegalArgumentException {
MethodSignature sig = nativeImpl.getImplements_();
String thiz = (String) ((NativeObject) interpreter.getCallstack().peek().getThis()).getNativeObject();
if (sig.getName().equals("substring")) {
Parameter startP = sig.getInput().get(0);
Parameter endP = sig.getInput().get(1);
Fraction start = (Fraction) ((NativeObject) interpreter.getCallstack().peek().getValue(startP)).getNativeObject();
RunletObject<AssociationEnd, TypeDefinition, ClassTypeDefinition> endValue = interpreter.getCallstack().peek().getValue(endP);
Fraction end = null;
if (!endValue.isEmpty()) {
end = (Fraction) ((NativeObject) interpreter.getCallstack().peek().getValue(endP)).getNativeObject();
}
if (end != null) {
return new ReturnInterpreter.ReturnResult(new NativeObject((ClassTypeDefinition) sig.getOutput(), thiz.substring(
start.intValue(), end.intValue()), interpreter.getDefaultSnapshot(), interpreter));
} else {
return new ReturnInterpreter.ReturnResult(new NativeObject((ClassTypeDefinition) sig.getOutput(), thiz
.substring(start.intValue()), interpreter.getDefaultSnapshot(), interpreter));
}
}
if (sig.getName().equals("length")) {
return new ReturnInterpreter.ReturnResult(new NativeObject((ClassTypeDefinition) sig.getOutput(), new Fraction(thiz
.length()), interpreter.getDefaultSnapshot(), interpreter));
}
if (sig.getName().equals("append")) {
Parameter sP = sig.getInput().get(0);
StringBuilder result = new StringBuilder(thiz);
for (RunletObject<AssociationEnd, TypeDefinition, ClassTypeDefinition> argument : interpreter.getCallstack().peek().getValue(sP)) {
result.append((String) ((NativeObject) argument).getNativeObject());
}
return new ReturnInterpreter.ReturnResult(new NativeObject((ClassTypeDefinition) sig.getOutput(), result.toString(),
interpreter.getDefaultSnapshot(), interpreter));
}
throw new RuntimeException("Unknown native method " + StringFormatter.toString(nativeImpl.getImplements_())
+ " and no native interpreter registered for class " + sig.getOwner().getName());
}
}