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package com.modulus.qbar.lang;
import com.modulus.common.collections.Stack;
import com.modulus.qbar.core.QBObject;
import com.modulus.qbar.core.interpreter.QBInterpreter;
import com.modulus.qbar.core.parser.ByteOperation;
import com.modulus.qbar.core.primitive.QBDouble;
import com.modulus.qbar.core.primitive.QBInt;
import com.modulus.qbar.core.primitive.QBPrimitive;
public class QBLazyRangeListConstructor extends ListConstructor{
private static final long serialVersionUID = -3617305937103054888L;
private ByteOperation[] start;
private ByteOperation[] second;
private ByteOperation[] end;
public QBLazyRangeListConstructor(ByteOperation[] start,
ByteOperation[] second, ByteOperation[] end) {
super();
this.start = start;
this.second = second;
this.end = end;
}
@Override
protected QBList makeList() {
Stack<QBObject> stack = QBInterpreter.instance().getStack();
QBPrimitive startValue;
if(start == null){
startValue = null;
} else{
exec( start, stack );
startValue = (QBPrimitive) returnedValue;
}
QBPrimitive secondValue;
if(second == null){
secondValue = null;
} else {
exec( second, stack );
secondValue = (QBPrimitive) returnedValue;
}
QBPrimitive endValue;
if(end == null){
endValue = null;
} else{
exec( end, stack );
endValue = (QBPrimitive) returnedValue;
}
double change = secondValue == null ? 1 : secondValue.doubleValue() - startValue.doubleValue();
QBPrimitive changeValue;
if(change % 1 == 0 && startValue instanceof QBInt)
changeValue = new QBInt((int)change);
else
changeValue = new QBDouble(change);
return new QBLazyRangeList(startValue, endValue, changeValue);
}
}
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