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/*
 * Copyright (c) 2013, 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 com.github.fge.jsonschema.syntax.draftv4;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jsonschema.processing.ProcessingException;
import com.github.fge.jsonschema.report.ProcessingReport;
import com.github.fge.jsonschema.syntax.helpers.SchemaOrSchemaArraySyntaxChecker;
import com.github.fge.jsonschema.syntax.SyntaxChecker;
import com.github.fge.jsonschema.tree.JsonSchemaTree;

import static com.github.fge.jsonschema.messages.SyntaxMessages.*;

public final class DraftV4ItemsSyntaxChecker
    extends SchemaOrSchemaArraySyntaxChecker
{
    private static final SyntaxChecker INSTANCE
        = new DraftV4ItemsSyntaxChecker();

    public static SyntaxChecker getInstance()
    {
        return INSTANCE;
    }

    private DraftV4ItemsSyntaxChecker()
    {
        super("items");
    }

    @Override
    protected void extraChecks(final ProcessingReport report,
        final JsonSchemaTree tree)
        throws ProcessingException
    {
        final JsonNode node = getNode(tree);

        if (node.isArray() && node.size() == 0)
            report.error(newMsg(tree, EMPTY_ARRAY));
    }
}