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A Java implementation of the JSON Schema specification

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/*
 * Copyright (c) 2012, Francis Galiegue 
 *
 * 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 .
 */

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.util.List;

/**
 * Syntax validator for keywords having a positive integer value as an argument
 *
 * Note that this is Java, which means there is the limit that such
 * arguments cannot be greater than {@link Integer#MAX_VALUE}. While not
 * strictly conformant with the specification, this implementation enforces
 * this.
 */
public final class PositiveIntegerSyntaxChecker
    extends AbstractSyntaxChecker
{
    public PositiveIntegerSyntaxChecker(final String keyword)
    {
        super(keyword, NodeType.INTEGER);
    }

    @Override
    public void checkValue(final Message.Builder msg,
        final List messages, final JsonNode schema)
    {
        final JsonNode node = schema.get(keyword);
        msg.addInfo("found", node);

        if (!node.canConvertToInt()) {
            msg.setMessage("integer value is too large")
                .addInfo("max", Integer.MAX_VALUE);
            messages.add(msg.build());
            return;
        }

        if (node.intValue() < 0)
            messages.add(msg.setMessage("value cannot be negative").build());
    }
}