com.enonic.cms.core.search.builder.ExpressionValueResolver.java Source code

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Here is the source code for com.enonic.cms.core.search.builder.ExpressionValueResolver.java

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/*
 * Copyright 2000-2013 Enonic AS
 * http://www.enonic.com/license
 */

package com.enonic.cms.core.search.builder;

import org.apache.commons.lang.StringUtils;

import com.enonic.cms.core.content.index.queryexpression.ArrayExpr;
import com.enonic.cms.core.content.index.queryexpression.Expression;
import com.enonic.cms.core.content.index.queryexpression.FunctionEvaluator;
import com.enonic.cms.core.content.index.queryexpression.FunctionExpr;
import com.enonic.cms.core.content.index.queryexpression.ValueExpr;

/**
 * Created by IntelliJ IDEA.
 * User: rmh
 * Date: 11/23/11
 * Time: 12:26 PM
 */
public final class ExpressionValueResolver {
    public static Object[] toValues(final Expression expr) {
        if (expr instanceof ArrayExpr) {
            return toValues((ArrayExpr) expr);
        } else if (expr instanceof ValueExpr) {
            return new Object[] { toValue((ValueExpr) expr) };
        } else if (expr instanceof FunctionExpr) {
            return toValues((FunctionExpr) expr);
        } else {
            return new String[0];
        }
    }

    public static Object toValue(final ValueExpr expr) {
        if (expr.isNumber()) {
            return expr.getValue();

        } else {
            final String stringValue = expr.getValue().toString();
            return StringUtils.lowerCase(stringValue);
        }
    }

    private static Object[] toValues(final ArrayExpr expr) {
        final ValueExpr[] list = expr.getValues();
        final Object[] result = new Object[list.length];

        for (int i = 0; i < list.length; i++) {
            result[i] = toValue(list[i]);
        }

        return result;
    }

    private static Object[] toValues(final FunctionExpr expr) {
        final FunctionEvaluator eval = new FunctionEvaluator();
        return toValues((Expression) expr.evaluate(eval));
    }

}