/*****************************************************************************
SQLJEP - Java SQL Expression Parser 0.2
November 1 2006
(c) Copyright 2006, Alexey Gaidukov
SQLJEP Author: Alexey Gaidukov
SQLJEP is based on JEP 2.24 (http://www.singularsys.com/jep/)
(c) Copyright 2002, Nathan Funk
See LICENSE.txt for license information.
*****************************************************************************/
package com.meidusa.amoeba.sqljep.function;
import com.meidusa.amoeba.sqljep.function.Comparative;
import com.meidusa.amoeba.sqljep.function.ComparativeComparator;
import com.meidusa.amoeba.sqljep.function.PostfixCommand;
import com.meidusa.amoeba.sqljep.ASTFunNode;
import com.meidusa.amoeba.sqljep.JepRuntime;
import com.meidusa.amoeba.sqljep.ParseException;
public final class Between extends PostfixCommand {
final public int getNumberOfParameters() {
return 3;
}
public boolean isAutoBox() {
return false;
}
public Comparable<?>[] evaluate(ASTFunNode node, JepRuntime runtime)
throws ParseException {
node.childrenAccept(runtime.ev, null);
Comparable<?> limit2 = runtime.stack.pop();
Comparable<?> limit1 = runtime.stack.pop();
Comparable<?> source = runtime.stack.pop();
return new Comparable<?>[] { source, limit1, limit2 };
}
public Comparable<?> getResult(Comparable<?>... comparables)
throws ParseException {
Comparable<?> limit2 = comparables[2];
Comparable<?> limit1 = comparables[1];
Comparable<?> source = comparables[0];
if (source == null || limit1 == null || limit2 == null) {
return (Boolean.FALSE);
} else {
if (source instanceof Comparative) {
Comparative other = (Comparative) source;
boolean result = other.intersect(
Comparative.GreaterThanOrEqual, limit1,
ComparativeComparator.comparator);
result = result
&& other.intersect(Comparative.LessThanOrEqual, limit2,
ComparativeComparator.comparator);
return (result);
} else {
return (ComparativeComparator.compareTo(source, limit1) >= 0 && ComparativeComparator
.compareTo(source, limit2) <= 0);
}
}
}
}