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Format specifiers for use with json-schema-validator

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package com.github.fge.jsonschema.formats;

import com.github.fge.jsonschema.exceptions.ProcessingException;
import com.github.fge.jsonschema.format.AbstractFormatAttribute;
import com.github.fge.jsonschema.format.FormatAttribute;
import com.github.fge.jsonschema.processors.data.FullData;
import com.github.fge.jsonschema.report.ProcessingReport;
import com.github.fge.jsonschema.util.NodeType;

import java.util.UUID;

/**
 * Format specifier for a proposed {@code uuid} attribute
 *
 * @see UUID#fromString(String)
 */
public final class UUIDFormatAttribute
    extends AbstractFormatAttribute
{
    private static final FormatAttribute instance = new UUIDFormatAttribute();

    private UUIDFormatAttribute()
    {
        super("uuid", NodeType.STRING);
    }

    public static FormatAttribute getInstance()
    {
        return instance;
    }

    @Override
    public void validate(final ProcessingReport report, final FullData data)
        throws ProcessingException
    {
        final String input = data.getInstance().getNode().textValue();

        try {
            UUID.fromString(input);
        } catch (IllegalArgumentException ignored) {
            report.error(newMsg(data, Messages.UUID_INVALID)
                .put("value", input));
        }
    }
}