com.github.fge.jsonschema.syntax.checkers.draftv3.ExtendsSyntaxChecker.java Source code

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Here is the source code for com.github.fge.jsonschema.syntax.checkers.draftv3.ExtendsSyntaxChecker.java

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/*
 * Copyright (c) 2013, 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 com.github.fge.jsonschema.syntax.checkers.draftv3;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jsonschema.exceptions.ProcessingException;
import com.github.fge.jsonschema.report.ProcessingReport;
import com.github.fge.jsonschema.syntax.checkers.SyntaxChecker;
import com.github.fge.jsonschema.syntax.checkers.helpers.SchemaOrSchemaArraySyntaxChecker;
import com.github.fge.jsonschema.tree.SchemaTree;

/**
 * Syntax checker for draft v3's {@code extends} keyword
 */
public final class ExtendsSyntaxChecker extends SchemaOrSchemaArraySyntaxChecker {
    private static final SyntaxChecker INSTANCE = new ExtendsSyntaxChecker();

    public static SyntaxChecker getInstance() {
        return INSTANCE;
    }

    private ExtendsSyntaxChecker() {
        super("extends");
    }

    @Override
    protected void extraChecks(final ProcessingReport report, final SchemaTree tree) throws ProcessingException {
        final JsonNode node = tree.getNode().get(keyword);
        if (node.isArray() && node.size() == 0)
            report.warn(newMsg(tree, "extendsEmptyArray"));
    }
}