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package io.swagger.transform.util;

import com.github.fge.jsonschema.core.load.configuration.LoadingConfiguration;
import com.github.fge.jsonschema.core.load.uri.URITranslatorConfiguration;
import com.github.fge.jsonschema.main.JsonSchemaFactory;

public final class SwaggerJsonSchemaFactory {
    private static final String BASE_URI
            = "http://swagger-api.github.io/schemas/";
    private static final String ROOT_CONTEXT = "resource:/schemas/";

    private static final SwaggerJsonSchemaFactory INSTANCE
            = new SwaggerJsonSchemaFactory();

    private final JsonSchemaFactory factory;

    private SwaggerJsonSchemaFactory() {
        final URITranslatorConfiguration translatorConfiguration
                = URITranslatorConfiguration.newBuilder()
                .setNamespace(ROOT_CONTEXT)
                .addPathRedirect(BASE_URI, ROOT_CONTEXT)
                .freeze();
        final LoadingConfiguration loadingConfiguration
                = LoadingConfiguration.newBuilder()
                .setURITranslatorConfiguration(translatorConfiguration)
                .freeze();
        factory = JsonSchemaFactory.newBuilder()
                .setLoadingConfiguration(loadingConfiguration).freeze();
    }

    public static SwaggerJsonSchemaFactory getInstance() {
        return INSTANCE;
    }

    public JsonSchemaFactory getFactory() {
        return factory;
    }
}