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Cayenne Object Persistence Framework

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 *  to you under the Apache License, Version 2.0 (the
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package org.apache.cayenne.exp.parser;

import org.apache.cayenne.exp.Expression;

/**
 * "Not In" expression.
 * 
 * @author Andrei Adamchik
 */
public class ASTNotIn extends ConditionNode {
    ASTNotIn(int id) {
        super(id);
    }

    public ASTNotIn() {
        super(ExpressionParserTreeConstants.JJTNOTIN);
    }

    public ASTNotIn(ASTPath path, ASTList list) {
        super(ExpressionParserTreeConstants.JJTNOTIN);
        jjtAddChild(path, 0);
        jjtAddChild(list, 1);
    }

    protected Object evaluateNode(Object o) throws Exception {
        int len = jjtGetNumChildren();
        if (len != 2) {
            return Boolean.FALSE;
        }

        Object o1 = evaluateChild(0, o);
        if (o1 == null) {
            return Boolean.FALSE;
        }

        Object[] objects = (Object[]) evaluateChild(1, o);
        if (objects == null) {
            return Boolean.FALSE;
        }

        int size = objects.length;
        for (int i = 0; i < size; i++) {
            if (o1.equals(objects[i])) {
                return Boolean.FALSE;
            }
        }

        return Boolean.TRUE;
    }

    /**
     * Creates a copy of this expression node, without copying children.
     */
    public Expression shallowCopy() {
        return new ASTNotIn(id);
    }

    protected String getExpressionOperator(int index) {
        return "not in";
    }

    public int getType() {
        return Expression.NOT_IN;
    }
}