FixedTranslator.java

/*
 * Copyright (c) 2014, Francis Galiegue (fgaliegue@gmail.com)
 *
 * This software is dual-licensed under:
 *
 * - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
 *   later version;
 * - the Apache Software License (ASL) version 2.0.
 *
 * The text of both licenses is available under the src/resources/ directory of
 * this project (under the names LGPL-3.0.txt and ASL-2.0.txt respectively).
 *
 * Direct link to the sources:
 *
 * - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
 * - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
 */

package com.github.fge.avro.translators;

import com.github.fge.avro.MutableTree;
import com.github.fge.jackson.NodeType;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import org.apache.avro.Schema;

final class FixedTranslator
    extends NamedAvroTypeTranslator
{
    private static final String BYTES_PATTERN = "^[\u0000-\u00ff]*$";

    private static final AvroTranslator INSTANCE = new FixedTranslator();

    private FixedTranslator()
    {
        super(Schema.Type.FIXED);
    }

    public static AvroTranslator getInstance()
    {
        return INSTANCE;
    }

    @Override
    protected void doTranslate(final Schema avroSchema,
        final MutableTree jsonSchema, final ProcessingReport report)
    {
        final int size = avroSchema.getFixedSize();
        jsonSchema.setType(NodeType.STRING);
        jsonSchema.getCurrentNode()
            .put("pattern", BYTES_PATTERN)
            .put("minLength", size)
            .put("maxLength", size);
    }
}