org.eel.kitchen.jsonschema.syntax.DivisibleBySyntaxChecker.java Source code

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Here is the source code for org.eel.kitchen.jsonschema.syntax.DivisibleBySyntaxChecker.java

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/*
 * Copyright (c) 2012, Francis Galiegue <fgaliegue@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Lesser GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Lesser GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.eel.kitchen.jsonschema.syntax;

import com.fasterxml.jackson.databind.JsonNode;
import org.eel.kitchen.jsonschema.report.Message;
import org.eel.kitchen.jsonschema.util.NodeType;

import java.math.BigDecimal;
import java.util.List;

/**
 * Syntax checker for the {@code divisibleBy} keyword
 *
 * <p>Note: in draft v4, this will be renamed to {@code mod}.</p>
 *
 */
public final class DivisibleBySyntaxChecker extends SimpleSyntaxChecker {
    private static final BigDecimal ZERO = BigDecimal.ZERO;

    private static final SyntaxChecker instance = new DivisibleBySyntaxChecker();

    private DivisibleBySyntaxChecker() {
        super("divisibleBy", NodeType.INTEGER, NodeType.NUMBER);
    }

    public static SyntaxChecker getInstance() {
        return instance;
    }

    @Override
    void checkValue(final Message.Builder msg, final List<Message> messages, final JsonNode schema) {
        final JsonNode node = schema.get(keyword);

        if (node.decimalValue().compareTo(ZERO) > 0)
            return;

        msg.setMessage("divisibleBy is not strictly greater than 0").addInfo("value", node);

        messages.add(msg.build());
    }
}