package railo.runtime.sql.old;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.FileReader;
import java.sql.SQLException;
import java.util.Vector;
// Referenced classes of package Zql:
// ZExpression, ZConstant, ZExp, ZTuple,
// ZqlParser
public final class ZEval
{
public ZEval()
{
}
public boolean eval(ZTuple ztuple, ZExp zexp)
throws SQLException
{
if(ztuple == null || zexp == null)
throw new SQLException("ZEval.eval(): null argument or operator");
if(!(zexp instanceof ZExpression))
throw new SQLException("ZEval.eval(): only expressions are supported");
ZExpression zexpression = (ZExpression)zexp;
String s = zexpression.getOperator();
if(s.equals("AND"))
{
boolean flag = true;
for(int i = 0; i < zexpression.nbOperands(); i++)
flag &= eval(ztuple, zexpression.getOperand(i));
return flag;
}
if(s.equals("OR"))
{
boolean flag1 = false;
for(int j = 0; j < zexpression.nbOperands(); j++)
flag1 |= eval(ztuple, zexpression.getOperand(j));
return flag1;
}
if(s.equals("NOT"))
return !eval(ztuple, zexpression.getOperand(0));
if(s.equals("="))
return evalCmp(ztuple, zexpression.getOperands()) == 0.0D;
if(s.equals("!="))
return evalCmp(ztuple, zexpression.getOperands()) != 0.0D;
if(s.equals("<>"))
return evalCmp(ztuple, zexpression.getOperands()) != 0.0D;
if(s.equals("#"))
throw new SQLException("ZEval.eval(): Operator # not supported");
if(s.equals(">"))
return evalCmp(ztuple, zexpression.getOperands()) > 0.0D;
if(s.equals(">="))
return evalCmp(ztuple, zexpression.getOperands()) >= 0.0D;
if(s.equals("<"))
return evalCmp(ztuple, zexpression.getOperands()) < 0.0D;
if(s.equals("<="))
return evalCmp(ztuple, zexpression.getOperands()) <= 0.0D;
if(s.equals("BETWEEN") || s.equals("NOT BETWEEN"))
{
ZExpression zexpression1 = new ZExpression("AND", new ZExpression(">=", zexpression.getOperand(0), zexpression.getOperand(1)), new ZExpression("<=", zexpression.getOperand(0), zexpression.getOperand(2)));
if(s.equals("NOT BETWEEN"))
return !eval(ztuple, ( (zexpression1)));
return eval(ztuple, ( (zexpression1)));
}
if(s.equals("LIKE") || s.equals("NOT LIKE"))
throw new SQLException("ZEval.eval(): Operator (NOT) LIKE not supported");
if(s.equals("IN") || s.equals("NOT IN"))
{
ZExpression zexpression2 = new ZExpression("OR");
for(int k = 1; k < zexpression.nbOperands(); k++)
zexpression2.addOperand(new ZExpression("=", zexpression.getOperand(0), zexpression.getOperand(k)));
if(s.equals("NOT IN"))
return !eval(ztuple, ( (zexpression2)));
return eval(ztuple, ( (zexpression2)));
}
if(s.equals("IS NULL"))
{
if(zexpression.nbOperands() <= 0 || zexpression.getOperand(0) == null)
return true;
ZExp zexp1 = zexpression.getOperand(0);
if(zexp1 instanceof ZConstant)
return ((ZConstant)zexp1).getType() == 1;
throw new SQLException("ZEval.eval(): can't eval IS (NOT) NULL");
}
if(s.equals("IS NOT NULL"))
{
ZExpression zexpression3 = new ZExpression("IS NULL");
zexpression3.setOperands(zexpression.getOperands());
return !eval(ztuple, ((zexpression3)));
}
throw new SQLException("ZEval.eval(): Unknown operator " + s);
}
double evalCmp(ZTuple ztuple, Vector vector)
throws SQLException
{
if(vector.size() < 2)
throw new SQLException("ZEval.evalCmp(): Trying to compare less than two values");
if(vector.size() > 2)
throw new SQLException("ZEval.evalCmp(): Trying to compare more than two values");
Object obj = null;
Object obj1 = null;
obj = evalExpValue(ztuple, (ZExp)vector.elementAt(0));
obj1 = evalExpValue(ztuple, (ZExp)vector.elementAt(1));
if((obj instanceof String) || (obj1 instanceof String))
return (obj.equals(obj1) ? 0 : -1);
if((obj instanceof Number) && (obj1 instanceof Number))
return ((Number)obj).doubleValue() - ((Number)obj1).doubleValue();
throw new SQLException("ZEval.evalCmp(): can't compare (" + obj.toString() + ") with (" + obj1.toString() + ")");
}
double evalNumericExp(ZTuple ztuple, ZExpression zexpression)
throws SQLException
{
if(ztuple == null || zexpression == null || zexpression.getOperator() == null)
throw new SQLException("ZEval.eval(): null argument or operator");
String s = zexpression.getOperator();
Object obj = evalExpValue(ztuple, zexpression.getOperand(0));
if(!(obj instanceof Double))
throw new SQLException("ZEval.evalNumericExp(): expression not numeric");
Double double1 = (Double)obj;
if(s.equals("+"))
{
double d = double1.doubleValue();
for(int i = 1; i < zexpression.nbOperands(); i++)
{
Object obj1 = evalExpValue(ztuple, zexpression.getOperand(i));
d += ((Number)obj1).doubleValue();
}
return d;
}
if(s.equals("-"))
{
double d1 = double1.doubleValue();
if(zexpression.nbOperands() == 1)
return -d1;
for(int j = 1; j < zexpression.nbOperands(); j++)
{
Object obj2 = evalExpValue(ztuple, zexpression.getOperand(j));
d1 -= ((Number)obj2).doubleValue();
}
return d1;
}
if(s.equals("*"))
{
double d2 = double1.doubleValue();
for(int k = 1; k < zexpression.nbOperands(); k++)
{
Object obj3 = evalExpValue(ztuple, zexpression.getOperand(k));
d2 *= ((Number)obj3).doubleValue();
}
return d2;
}
if(s.equals("/"))
{
double d3 = double1.doubleValue();
for(int l = 1; l < zexpression.nbOperands(); l++)
{
Object obj4 = evalExpValue(ztuple, zexpression.getOperand(l));
d3 /= ((Number)obj4).doubleValue();
}
return d3;
}
if(s.equals("**"))
{
double d4 = double1.doubleValue();
for(int i1 = 1; i1 < zexpression.nbOperands(); i1++)
{
Object obj5 = evalExpValue(ztuple, zexpression.getOperand(i1));
d4 = Math.pow(d4, ((Number)obj5).doubleValue());
}
return d4;
}
throw new SQLException("ZEval.evalNumericExp(): Unknown operator " + s);
}
public Object evalExpValue(ZTuple ztuple, ZExp zexp)
throws SQLException
{
Object obj = null;
if(zexp instanceof ZConstant)
{
ZConstant zconstant = (ZConstant)zexp;
switch(zconstant.getType())
{
case 0: // '\0'
Object obj1 = ztuple.getAttValue(zconstant.getValue());
if(obj1 == null)
throw new SQLException("ZEval.evalExpValue(): unknown column " + zconstant.getValue());
try
{
obj = new Double(obj1.toString());
}
catch(NumberFormatException numberformatexception)
{
obj = obj1;
}
break;
case 2: // '\002'
obj = new Double(zconstant.getValue());
break;
case 1: // '\001'
case 3: // '\003'
default:
obj = zconstant.getValue();
break;
}
} else
if(zexp instanceof ZExpression)
obj = new Double(evalNumericExp(ztuple, (ZExpression)zexp));
return obj;
}
public static void main(String args[])
{
try
{
BufferedReader bufferedreader = new BufferedReader(new FileReader("test.db"));
String s = bufferedreader.readLine();
ZTuple ztuple = new ZTuple(s);
ZqlParser zqlparser = new ZqlParser();
ZEval zeval = new ZEval();
while((s = bufferedreader.readLine()) != null)
{
ztuple.setRow(s);
BufferedReader bufferedreader1 = new BufferedReader(new FileReader("test.sql"));
String s1;
while((s1 = bufferedreader1.readLine()) != null)
{
zqlparser.initParser(new ByteArrayInputStream(s1.getBytes()));
ZExp zexp = zqlparser.readExpression();
System.out.print(s + ", " + s1 + ", ");
System.out.println(zeval.eval(ztuple, zexp));
}
bufferedreader1.close();
}
bufferedreader.close();
}
catch(Exception exception)
{
}
}
}