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  * Copyright (c) 2012, Francis Galiegue <>
  * Copyright (c) 2012, Corey Sciuto <>
  * 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
 * 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.keyword.common;
Validator for the format keyword

The format keyword is a particular beast, since it is the only validation keyword able to do semantic analysis of an instance.

This library supports all format attributes defined by draft v3 and draft v4, apart from color and style (for which support is deliberately ommitted). A collection of additional format attributes can be found in a sister project: json-schema-formats.

See also:
public final class FormatKeywordValidator
    extends KeywordValidator
    // The format attribute
    private final String fmt;
    public FormatKeywordValidator(final JsonNode schema)
        super("format", NodeType.values());
         = schema.get().textValue();
    protected void validate(final ValidationContext context,
        final ValidationReport reportfinal JsonNode instance)
        final FormatAttribute attribute = context.getFormat();
        if (attribute != null)
    public String toString()
        return  + ": " + ;
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