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 *  or more contributor license agreements.  See the NOTICE file
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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;

/**
 * "In" expression.
 * 
 * @author Andrei Adamchik
 */
public class ASTIn extends ConditionNode {

    /**
     * Constructor used by expression parser. Do not invoke directly.
     */
    ASTIn(int id) {
        super(id);
    }

    public ASTIn() {
        super(ExpressionParserTreeConstants.JJTIN);
    }

    public ASTIn(ASTPath path, ASTList list) {
        super(ExpressionParserTreeConstants.JJTIN);
        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.TRUE;
            }
        }

        return Boolean.FALSE;
    }

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

    protected String getExpressionOperator(int index) {
        return "in";
    }

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