/*****************************************************************************
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.ASTArray;
import com.meidusa.amoeba.sqljep.ASTFunNode;
import com.meidusa.amoeba.sqljep.JepRuntime;
import com.meidusa.amoeba.sqljep.Node;
import com.meidusa.amoeba.sqljep.ParseException;
public final class In extends PostfixCommand {
public boolean isAutoBox() {
return false;
}
final public int getNumberOfParameters() {
return 2;
}
public Comparable<?>[] evaluate(ASTFunNode node, JepRuntime runtime)
throws ParseException {
node.jjtGetChild(0).jjtAccept(runtime.ev, null);
Comparable<?> source = runtime.stack.pop();
if (source == null) {
return new Comparable<?>[] { (Boolean.FALSE) };
} else {
Node arg = node.jjtGetChild(1);
if (arg instanceof ASTArray) {
arg.jjtAccept(runtime.ev, null);
int childSize = arg.jjtGetNumChildren();
for (int i = 0; i < childSize; i++) {
Comparable<?> d = runtime.stack.pop();
if (source instanceof Comparative) {
Comparative other = (Comparative) source;
boolean result = other.intersect(
Comparative.Equivalent, d,
ComparativeComparator.comparator);
if (result) {
runtime.stack.setSize(runtime.stack.size()
- (childSize - i - 1));
return new Comparable<?>[] { (Boolean.TRUE) };
}
} else if (d != null
&& ComparativeComparator.compareTo(source, d) == 0) {
// runtime.stack.setSize(0);
runtime.stack.setSize(runtime.stack.size()
- (childSize - i - 1));
return new Comparable<?>[] { (Boolean.TRUE) };
}
}
// runtime.stack.setSize(0);
return new Comparable<?>[] { (Boolean.FALSE) };
} else {
throw new ParseException("Internal error in function IN");
}
}
}
public Comparable<?> getResult(Comparable<?>... comparables)
throws ParseException {
return comparables[0];
}
}